./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe012_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/safe012_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe012_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:06:57,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:06:57,401 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:06:57,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:06:57,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:06:57,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:06:57,432 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:06:57,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:06:57,433 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:06:57,436 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:06:57,437 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:06:57,437 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:06:57,438 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:06:57,439 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:06:57,439 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:06:57,439 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:06:57,439 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:06:57,440 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:06:57,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:06:57,440 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:06:57,440 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:06:57,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:06:57,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:06:57,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:06:57,441 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:06:57,441 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:06:57,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:06:57,442 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:06:57,442 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:06:57,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:06:57,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:06:57,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:06:57,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:06:57,444 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:06:57,452 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:06:57,452 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:06:57,452 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:06:57,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:06:57,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:06:57,453 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:06:57,453 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:06:57,453 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:06:57,454 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:06:57,454 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:06:57,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:06:57,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:06:57,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:06:57,700 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:06:57,701 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:06:57,702 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-27 21:06:58,785 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:06:58,983 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:06:58,983 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-27 21:06:58,997 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39061838a/e8e9d9a87790474db93bfe0fe59aed83/FLAGbd21c93e7 [2024-06-27 21:06:59,007 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39061838a/e8e9d9a87790474db93bfe0fe59aed83 [2024-06-27 21:06:59,009 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:06:59,010 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:06:59,010 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe012_rmo.oepc.yml/witness.yml [2024-06-27 21:06:59,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:06:59,239 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:06:59,240 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:06:59,240 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:06:59,244 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:06:59,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:06:59" (1/2) ... [2024-06-27 21:06:59,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ad7a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:06:59, skipping insertion in model container [2024-06-27 21:06:59,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:06:59" (1/2) ... [2024-06-27 21:06:59,247 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@71f4d73a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:06:59, skipping insertion in model container [2024-06-27 21:06:59,247 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:06:59" (2/2) ... [2024-06-27 21:06:59,247 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ad7a71 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59, skipping insertion in model container [2024-06-27 21:06:59,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:06:59" (2/2) ... [2024-06-27 21:06:59,248 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:06:59,360 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:06:59,362 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:06:59,362 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:06:59,362 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:06:59,362 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:06:59,362 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-27 21:06:59,398 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:06:59,708 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:06:59,719 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:06:59,847 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:06:59,881 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:06:59,881 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59 WrapperNode [2024-06-27 21:06:59,881 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:06:59,883 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:06:59,883 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:06:59,883 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:06:59,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:06:59,918 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:06:59,967 INFO L138 Inliner]: procedures = 175, calls = 68, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 173 [2024-06-27 21:06:59,968 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:06:59,969 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:06:59,969 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:06:59,969 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:06:59,992 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:06:59,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:06:59,999 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:07:00,024 INFO L175 MemorySlicer]: Split 27 memory accesses to 2 slices as follows [2, 25]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-27 21:07:00,030 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:07:00,030 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:07:00,045 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:07:00,046 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:07:00,048 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:07:00,049 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:07:00,052 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:07:00,053 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:07:00,053 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:07:00,053 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:07:00,068 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (1/1) ... [2024-06-27 21:07:00,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:07:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:07:00,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:07:00,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:07:00,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:07:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:07:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:07:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:07:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:07:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:07:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:07:00,166 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:07:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:07:00,166 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:07:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:07:00,166 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:07:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:07:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:07:00,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:07:00,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:07:00,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:07:00,170 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:07:00,317 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:07:00,319 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:07:00,654 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:07:00,655 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:07:00,901 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:07:00,901 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:07:00,902 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:07:00 BoogieIcfgContainer [2024-06-27 21:07:00,902 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:07:00,904 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:07:00,904 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:07:00,906 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:07:00,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:06:59" (1/4) ... [2024-06-27 21:07:00,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783ff667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:07:00, skipping insertion in model container [2024-06-27 21:07:00,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:06:59" (2/4) ... [2024-06-27 21:07:00,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783ff667 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:07:00, skipping insertion in model container [2024-06-27 21:07:00,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:06:59" (3/4) ... [2024-06-27 21:07:00,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783ff667 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:07:00, skipping insertion in model container [2024-06-27 21:07:00,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:07:00" (4/4) ... [2024-06-27 21:07:00,908 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_rmo.oepc.i [2024-06-27 21:07:00,921 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:07:00,921 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:07:00,921 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:07:00,968 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:07:01,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:07:01,051 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 21:07:01,051 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:07:01,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:07:01,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:07:01,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 21:07:01,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:07:01,073 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;@47966274, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:07:01,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:07:01,081 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:07:01,081 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:07:01,081 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:07:01,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:01,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:07:01,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:01,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash 572520196, now seen corresponding path program 1 times [2024-06-27 21:07:01,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:01,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961868127] [2024-06-27 21:07:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:01,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:02,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:02,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961868127] [2024-06-27 21:07:02,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961868127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:02,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:02,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:07:02,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226332949] [2024-06-27 21:07:02,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:02,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:07:02,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:02,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:07:02,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:07:02,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 21:07:03,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:03,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:03,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 21:07:03,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:03,353 INFO L124 PetriNetUnfolderBase]: 770/1239 cut-off events. [2024-06-27 21:07:03,354 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 21:07:03,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 1239 events. 770/1239 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5945 event pairs, 479 based on Foata normal form. 1/1207 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-27 21:07:03,365 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 21:07:03,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-27 21:07:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:07:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:07:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-27 21:07:03,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-27 21:07:03,377 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-27 21:07:03,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-27 21:07:03,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:03,383 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 21:07:03,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 21:07:03,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 21:07:03,387 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 21:07:03,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:03,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:03,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:03,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:07:03,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:03,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:03,389 INFO L85 PathProgramCache]: Analyzing trace with hash 436118723, now seen corresponding path program 1 times [2024-06-27 21:07:03,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:03,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075325083] [2024-06-27 21:07:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:03,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:05,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:05,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075325083] [2024-06-27 21:07:05,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075325083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:05,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:05,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:07:05,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719229395] [2024-06-27 21:07:05,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:05,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:07:05,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:05,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:07:05,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:07:05,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 21:07:05,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:05,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:05,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 21:07:05,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:05,962 INFO L124 PetriNetUnfolderBase]: 764/1231 cut-off events. [2024-06-27 21:07:05,963 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-27 21:07:05,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 1231 events. 764/1231 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5880 event pairs, 369 based on Foata normal form. 6/1232 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-27 21:07:05,969 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-27 21:07:05,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-27 21:07:05,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:07:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:07:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-27 21:07:05,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 21:07:05,971 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-27 21:07:05,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-27 21:07:05,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:07:05,972 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 21:07:05,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 21:07:05,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 21:07:05,973 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 21:07:05,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:05,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:05,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:05,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:07:05,974 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:05,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash 137620783, now seen corresponding path program 1 times [2024-06-27 21:07:05,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:05,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880130232] [2024-06-27 21:07:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:05,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:08,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:08,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880130232] [2024-06-27 21:07:08,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880130232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:08,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:08,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:07:08,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248593488] [2024-06-27 21:07:08,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:08,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:07:08,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:08,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:07:08,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:07:08,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 21:07:08,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:08,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:08,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 21:07:08,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:09,546 INFO L124 PetriNetUnfolderBase]: 969/1526 cut-off events. [2024-06-27 21:07:09,546 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-27 21:07:09,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 1526 events. 969/1526 cut-off events. For 847/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7172 event pairs, 305 based on Foata normal form. 12/1530 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-27 21:07:09,553 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-27 21:07:09,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-27 21:07:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:07:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:07:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-27 21:07:09,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 21:07:09,555 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-27 21:07:09,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-27 21:07:09,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:07:09,557 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-27 21:07:09,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 21:07:09,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-27 21:07:09,558 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-27 21:07:09,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:09,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:09,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:09,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:07:09,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:09,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:09,559 INFO L85 PathProgramCache]: Analyzing trace with hash -810675488, now seen corresponding path program 1 times [2024-06-27 21:07:09,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:09,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506058564] [2024-06-27 21:07:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:09,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:10,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:10,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506058564] [2024-06-27 21:07:10,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506058564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:10,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:10,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:07:10,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459802968] [2024-06-27 21:07:10,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:10,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:07:10,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:10,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:07:10,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:07:10,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:07:10,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:10,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:10,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:07:10,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:11,632 INFO L124 PetriNetUnfolderBase]: 964/1518 cut-off events. [2024-06-27 21:07:11,633 INFO L125 PetriNetUnfolderBase]: For 1574/1586 co-relation queries the response was YES. [2024-06-27 21:07:11,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4298 conditions, 1518 events. 964/1518 cut-off events. For 1574/1586 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7070 event pairs, 382 based on Foata normal form. 8/1523 useless extension candidates. Maximal degree in co-relation 4281. Up to 1452 conditions per place. [2024-06-27 21:07:11,640 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-27 21:07:11,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 337 flow [2024-06-27 21:07:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:07:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:07:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-27 21:07:11,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 21:07:11,643 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 93 transitions. [2024-06-27 21:07:11,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 337 flow [2024-06-27 21:07:11,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 310 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:11,648 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-27 21:07:11,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 21:07:11,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-27 21:07:11,649 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-27 21:07:11,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:11,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:11,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:11,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:07:11,651 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:11,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash 638865223, now seen corresponding path program 1 times [2024-06-27 21:07:11,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:11,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81072665] [2024-06-27 21:07:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:11,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:13,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:13,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81072665] [2024-06-27 21:07:13,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81072665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:13,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:13,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:07:13,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144711157] [2024-06-27 21:07:13,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:13,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:07:13,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:13,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:07:13,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:07:13,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:13,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:13,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:13,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:13,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:14,120 INFO L124 PetriNetUnfolderBase]: 1112/1732 cut-off events. [2024-06-27 21:07:14,121 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-06-27 21:07:14,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5220 conditions, 1732 events. 1112/1732 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8087 event pairs, 451 based on Foata normal form. 2/1732 useless extension candidates. Maximal degree in co-relation 5201. Up to 1656 conditions per place. [2024-06-27 21:07:14,132 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-27 21:07:14,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 424 flow [2024-06-27 21:07:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:07:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:07:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 21:07:14,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:07:14,136 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 105 transitions. [2024-06-27 21:07:14,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 424 flow [2024-06-27 21:07:14,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 397 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:14,147 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 265 flow [2024-06-27 21:07:14,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-27 21:07:14,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 21:07:14,150 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 265 flow [2024-06-27 21:07:14,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:14,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:14,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:14,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:07:14,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:14,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1282349467, now seen corresponding path program 1 times [2024-06-27 21:07:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:14,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791741057] [2024-06-27 21:07:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:14,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:16,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:16,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791741057] [2024-06-27 21:07:16,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791741057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:16,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:16,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:07:16,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218492384] [2024-06-27 21:07:16,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:16,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:07:16,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:16,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:07:16,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:07:16,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:07:16,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:16,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:16,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:07:16,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:17,586 INFO L124 PetriNetUnfolderBase]: 1067/1677 cut-off events. [2024-06-27 21:07:17,586 INFO L125 PetriNetUnfolderBase]: For 3654/3686 co-relation queries the response was YES. [2024-06-27 21:07:17,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5604 conditions, 1677 events. 1067/1677 cut-off events. For 3654/3686 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7964 event pairs, 390 based on Foata normal form. 14/1679 useless extension candidates. Maximal degree in co-relation 5582. Up to 1549 conditions per place. [2024-06-27 21:07:17,596 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-27 21:07:17,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 535 flow [2024-06-27 21:07:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:07:17,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:07:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 21:07:17,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 21:07:17,598 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 265 flow. Second operand 6 states and 118 transitions. [2024-06-27 21:07:17,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 535 flow [2024-06-27 21:07:17,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 529 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 21:07:17,603 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 347 flow [2024-06-27 21:07:17,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-27 21:07:17,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-27 21:07:17,606 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 347 flow [2024-06-27 21:07:17,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:17,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:17,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:17,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:07:17,606 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:17,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:17,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1268736127, now seen corresponding path program 2 times [2024-06-27 21:07:17,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:17,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625669302] [2024-06-27 21:07:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:17,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:19,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:19,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625669302] [2024-06-27 21:07:19,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625669302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:19,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:19,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:07:19,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504457083] [2024-06-27 21:07:19,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:19,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:07:19,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:19,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:07:19,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:07:19,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:07:19,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:19,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:19,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:07:19,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:20,731 INFO L124 PetriNetUnfolderBase]: 1082/1704 cut-off events. [2024-06-27 21:07:20,732 INFO L125 PetriNetUnfolderBase]: For 5157/5202 co-relation queries the response was YES. [2024-06-27 21:07:20,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6222 conditions, 1704 events. 1082/1704 cut-off events. For 5157/5202 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8122 event pairs, 390 based on Foata normal form. 16/1709 useless extension candidates. Maximal degree in co-relation 6197. Up to 1574 conditions per place. [2024-06-27 21:07:20,742 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-27 21:07:20,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 535 flow [2024-06-27 21:07:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:07:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:07:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 21:07:20,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:07:20,744 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 347 flow. Second operand 6 states and 112 transitions. [2024-06-27 21:07:20,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 535 flow [2024-06-27 21:07:20,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 502 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 21:07:20,750 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 361 flow [2024-06-27 21:07:20,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-27 21:07:20,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-27 21:07:20,751 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 361 flow [2024-06-27 21:07:20,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:20,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:20,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:20,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:07:20,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:20,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1343319274, now seen corresponding path program 1 times [2024-06-27 21:07:20,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:20,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452168701] [2024-06-27 21:07:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:22,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:22,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452168701] [2024-06-27 21:07:22,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452168701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:22,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:22,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:22,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201397568] [2024-06-27 21:07:22,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:22,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:22,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:22,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:07:22,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:22,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:22,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:07:22,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:24,091 INFO L124 PetriNetUnfolderBase]: 1118/1769 cut-off events. [2024-06-27 21:07:24,091 INFO L125 PetriNetUnfolderBase]: For 5970/6010 co-relation queries the response was YES. [2024-06-27 21:07:24,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6520 conditions, 1769 events. 1118/1769 cut-off events. For 5970/6010 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8475 event pairs, 385 based on Foata normal form. 16/1774 useless extension candidates. Maximal degree in co-relation 6493. Up to 1608 conditions per place. [2024-06-27 21:07:24,101 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 75 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-27 21:07:24,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 110 transitions, 733 flow [2024-06-27 21:07:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 21:07:24,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 21:07:24,104 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 361 flow. Second operand 8 states and 154 transitions. [2024-06-27 21:07:24,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 110 transitions, 733 flow [2024-06-27 21:07:24,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 110 transitions, 669 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:24,110 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 468 flow [2024-06-27 21:07:24,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-27 21:07:24,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-27 21:07:24,111 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 468 flow [2024-06-27 21:07:24,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:24,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:24,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:24,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:07:24,112 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:24,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:24,112 INFO L85 PathProgramCache]: Analyzing trace with hash -408290356, now seen corresponding path program 2 times [2024-06-27 21:07:24,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:24,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444088576] [2024-06-27 21:07:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:24,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:27,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:27,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444088576] [2024-06-27 21:07:27,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444088576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:27,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:27,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:27,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755493198] [2024-06-27 21:07:27,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:27,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:27,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:27,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:07:27,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 468 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:27,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:27,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:07:27,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:27,973 INFO L124 PetriNetUnfolderBase]: 1131/1794 cut-off events. [2024-06-27 21:07:27,973 INFO L125 PetriNetUnfolderBase]: For 7709/7762 co-relation queries the response was YES. [2024-06-27 21:07:27,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7122 conditions, 1794 events. 1131/1794 cut-off events. For 7709/7762 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8631 event pairs, 370 based on Foata normal form. 28/1811 useless extension candidates. Maximal degree in co-relation 7093. Up to 1610 conditions per place. [2024-06-27 21:07:27,986 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-27 21:07:27,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 794 flow [2024-06-27 21:07:27,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 21:07:27,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 21:07:27,988 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 468 flow. Second operand 7 states and 135 transitions. [2024-06-27 21:07:27,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 794 flow [2024-06-27 21:07:27,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 751 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:27,994 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 528 flow [2024-06-27 21:07:27,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-27 21:07:27,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-27 21:07:27,995 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 528 flow [2024-06-27 21:07:27,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:27,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:27,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:27,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:07:27,996 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:27,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:27,996 INFO L85 PathProgramCache]: Analyzing trace with hash -408170200, now seen corresponding path program 1 times [2024-06-27 21:07:27,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:28,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287249612] [2024-06-27 21:07:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:28,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:30,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:30,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287249612] [2024-06-27 21:07:30,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287249612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:30,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:30,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67598266] [2024-06-27 21:07:30,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:30,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:30,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:30,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:30,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 528 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:30,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:30,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:30,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:31,762 INFO L124 PetriNetUnfolderBase]: 1231/1932 cut-off events. [2024-06-27 21:07:31,762 INFO L125 PetriNetUnfolderBase]: For 9720/9724 co-relation queries the response was YES. [2024-06-27 21:07:31,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7926 conditions, 1932 events. 1231/1932 cut-off events. For 9720/9724 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9212 event pairs, 407 based on Foata normal form. 6/1935 useless extension candidates. Maximal degree in co-relation 7896. Up to 1748 conditions per place. [2024-06-27 21:07:31,772 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 23 changer transitions 0/124 dead transitions. [2024-06-27 21:07:31,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 981 flow [2024-06-27 21:07:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 21:07:31,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 21:07:31,781 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 528 flow. Second operand 7 states and 131 transitions. [2024-06-27 21:07:31,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 981 flow [2024-06-27 21:07:31,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 124 transitions, 896 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:31,789 INFO L231 Difference]: Finished difference. Result has 78 places, 92 transitions, 619 flow [2024-06-27 21:07:31,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=619, PETRI_PLACES=78, PETRI_TRANSITIONS=92} [2024-06-27 21:07:31,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-27 21:07:31,790 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 92 transitions, 619 flow [2024-06-27 21:07:31,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:31,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:31,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:31,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:07:31,791 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:31,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash -399079630, now seen corresponding path program 3 times [2024-06-27 21:07:31,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:31,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523850528] [2024-06-27 21:07:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:31,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:34,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:34,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523850528] [2024-06-27 21:07:34,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523850528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:34,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:34,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:34,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305820633] [2024-06-27 21:07:34,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:34,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:34,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:34,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:34,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:34,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:07:34,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 619 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:34,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:34,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:07:34,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:35,547 INFO L124 PetriNetUnfolderBase]: 1182/1887 cut-off events. [2024-06-27 21:07:35,547 INFO L125 PetriNetUnfolderBase]: For 10037/10178 co-relation queries the response was YES. [2024-06-27 21:07:35,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7868 conditions, 1887 events. 1182/1887 cut-off events. For 10037/10178 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9291 event pairs, 354 based on Foata normal form. 36/1878 useless extension candidates. Maximal degree in co-relation 7835. Up to 1589 conditions per place. [2024-06-27 21:07:35,557 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 44 changer transitions 0/127 dead transitions. [2024-06-27 21:07:35,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1021 flow [2024-06-27 21:07:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 21:07:35,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 21:07:35,559 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 619 flow. Second operand 7 states and 137 transitions. [2024-06-27 21:07:35,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1021 flow [2024-06-27 21:07:35,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 127 transitions, 991 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:35,567 INFO L231 Difference]: Finished difference. Result has 82 places, 98 transitions, 748 flow [2024-06-27 21:07:35,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=748, PETRI_PLACES=82, PETRI_TRANSITIONS=98} [2024-06-27 21:07:35,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 21:07:35,567 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 98 transitions, 748 flow [2024-06-27 21:07:35,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:35,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:35,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:35,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:07:35,568 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:35,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash -668962858, now seen corresponding path program 2 times [2024-06-27 21:07:35,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:35,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861067781] [2024-06-27 21:07:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:35,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:37,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:37,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861067781] [2024-06-27 21:07:37,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861067781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:37,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:37,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:37,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972573476] [2024-06-27 21:07:37,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:37,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:37,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:37,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:37,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:37,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 98 transitions, 748 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:37,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:37,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:37,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:38,985 INFO L124 PetriNetUnfolderBase]: 1262/1987 cut-off events. [2024-06-27 21:07:38,985 INFO L125 PetriNetUnfolderBase]: For 12049/12068 co-relation queries the response was YES. [2024-06-27 21:07:38,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8675 conditions, 1987 events. 1262/1987 cut-off events. For 12049/12068 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9579 event pairs, 404 based on Foata normal form. 16/1999 useless extension candidates. Maximal degree in co-relation 8641. Up to 1788 conditions per place. [2024-06-27 21:07:39,020 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 27 changer transitions 0/131 dead transitions. [2024-06-27 21:07:39,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 131 transitions, 1155 flow [2024-06-27 21:07:39,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:07:39,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 21:07:39,022 INFO L175 Difference]: Start difference. First operand has 82 places, 98 transitions, 748 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:07:39,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 131 transitions, 1155 flow [2024-06-27 21:07:39,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 131 transitions, 1104 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:39,034 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 799 flow [2024-06-27 21:07:39,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=799, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2024-06-27 21:07:39,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-27 21:07:39,035 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 799 flow [2024-06-27 21:07:39,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:39,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:39,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:39,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:07:39,036 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:39,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash -231038866, now seen corresponding path program 4 times [2024-06-27 21:07:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:39,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046311607] [2024-06-27 21:07:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:41,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:41,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046311607] [2024-06-27 21:07:41,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046311607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:41,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:41,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:41,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953977238] [2024-06-27 21:07:41,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:41,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:41,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:41,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:07:41,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 799 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:41,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:41,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:07:41,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:42,582 INFO L124 PetriNetUnfolderBase]: 1189/1900 cut-off events. [2024-06-27 21:07:42,582 INFO L125 PetriNetUnfolderBase]: For 14033/14146 co-relation queries the response was YES. [2024-06-27 21:07:42,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8673 conditions, 1900 events. 1189/1900 cut-off events. For 14033/14146 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9313 event pairs, 365 based on Foata normal form. 22/1875 useless extension candidates. Maximal degree in co-relation 8636. Up to 1598 conditions per place. [2024-06-27 21:07:42,594 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 45 changer transitions 0/127 dead transitions. [2024-06-27 21:07:42,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 127 transitions, 1093 flow [2024-06-27 21:07:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 21:07:42,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 21:07:42,596 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 799 flow. Second operand 7 states and 131 transitions. [2024-06-27 21:07:42,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 127 transitions, 1093 flow [2024-06-27 21:07:42,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 127 transitions, 1040 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:42,610 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 845 flow [2024-06-27 21:07:42,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=845, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-06-27 21:07:42,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 21:07:42,611 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 845 flow [2024-06-27 21:07:42,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:42,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:42,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:42,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:07:42,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:42,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash -230801530, now seen corresponding path program 3 times [2024-06-27 21:07:42,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:42,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668399824] [2024-06-27 21:07:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:42,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:44,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:44,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668399824] [2024-06-27 21:07:44,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668399824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:44,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:44,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:44,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654522875] [2024-06-27 21:07:44,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:44,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:44,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:44,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:44,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:44,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:44,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 845 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:44,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:44,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:44,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:45,389 INFO L124 PetriNetUnfolderBase]: 1249/1969 cut-off events. [2024-06-27 21:07:45,389 INFO L125 PetriNetUnfolderBase]: For 15428/15447 co-relation queries the response was YES. [2024-06-27 21:07:45,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8999 conditions, 1969 events. 1249/1969 cut-off events. For 15428/15447 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9503 event pairs, 403 based on Foata normal form. 16/1981 useless extension candidates. Maximal degree in co-relation 8960. Up to 1772 conditions per place. [2024-06-27 21:07:45,400 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 29 changer transitions 0/130 dead transitions. [2024-06-27 21:07:45,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 130 transitions, 1182 flow [2024-06-27 21:07:45,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:07:45,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 21:07:45,421 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 845 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:07:45,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 130 transitions, 1182 flow [2024-06-27 21:07:45,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1062 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:45,434 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 798 flow [2024-06-27 21:07:45,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=798, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2024-06-27 21:07:45,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-27 21:07:45,435 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 798 flow [2024-06-27 21:07:45,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:45,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:45,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:45,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:07:45,436 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:45,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:45,436 INFO L85 PathProgramCache]: Analyzing trace with hash -230792602, now seen corresponding path program 1 times [2024-06-27 21:07:45,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:45,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024957988] [2024-06-27 21:07:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:47,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:47,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024957988] [2024-06-27 21:07:47,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024957988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:47,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:47,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:47,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624878218] [2024-06-27 21:07:47,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:47,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:47,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:47,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:47,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:47,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 798 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:47,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:47,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:47,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:48,181 INFO L124 PetriNetUnfolderBase]: 1241/1951 cut-off events. [2024-06-27 21:07:48,182 INFO L125 PetriNetUnfolderBase]: For 16336/16338 co-relation queries the response was YES. [2024-06-27 21:07:48,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8951 conditions, 1951 events. 1241/1951 cut-off events. For 16336/16338 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9366 event pairs, 390 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 8911. Up to 1825 conditions per place. [2024-06-27 21:07:48,195 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 113 selfloop transitions, 13 changer transitions 0/131 dead transitions. [2024-06-27 21:07:48,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 1132 flow [2024-06-27 21:07:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:07:48,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 21:07:48,209 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 798 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:07:48,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 1132 flow [2024-06-27 21:07:48,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 131 transitions, 1087 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 21:07:48,224 INFO L231 Difference]: Finished difference. Result has 95 places, 106 transitions, 802 flow [2024-06-27 21:07:48,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=802, PETRI_PLACES=95, PETRI_TRANSITIONS=106} [2024-06-27 21:07:48,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-27 21:07:48,225 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 106 transitions, 802 flow [2024-06-27 21:07:48,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:48,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:48,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:48,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:07:48,225 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:48,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash 227902427, now seen corresponding path program 1 times [2024-06-27 21:07:48,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:48,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774778723] [2024-06-27 21:07:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:48,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:50,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:50,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774778723] [2024-06-27 21:07:50,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774778723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:50,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:50,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:50,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388946998] [2024-06-27 21:07:50,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:50,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:50,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:50,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 802 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:50,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:50,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:50,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:52,051 INFO L124 PetriNetUnfolderBase]: 1254/1978 cut-off events. [2024-06-27 21:07:52,051 INFO L125 PetriNetUnfolderBase]: For 18230/18238 co-relation queries the response was YES. [2024-06-27 21:07:52,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9266 conditions, 1978 events. 1254/1978 cut-off events. For 18230/18238 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9515 event pairs, 374 based on Foata normal form. 10/1986 useless extension candidates. Maximal degree in co-relation 9225. Up to 1776 conditions per place. [2024-06-27 21:07:52,063 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 25 changer transitions 0/158 dead transitions. [2024-06-27 21:07:52,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 158 transitions, 1329 flow [2024-06-27 21:07:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:07:52,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:07:52,082 INFO L175 Difference]: Start difference. First operand has 95 places, 106 transitions, 802 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:07:52,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 158 transitions, 1329 flow [2024-06-27 21:07:52,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 158 transitions, 1298 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:52,097 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 984 flow [2024-06-27 21:07:52,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=984, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-27 21:07:52,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-27 21:07:52,098 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 984 flow [2024-06-27 21:07:52,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:52,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:52,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:52,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:07:52,099 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:52,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:52,099 INFO L85 PathProgramCache]: Analyzing trace with hash 231627077, now seen corresponding path program 2 times [2024-06-27 21:07:52,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:52,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933627415] [2024-06-27 21:07:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:52,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:54,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:54,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933627415] [2024-06-27 21:07:54,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933627415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:54,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:54,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:54,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770129782] [2024-06-27 21:07:54,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:54,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:54,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:54,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 984 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:54,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:54,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:54,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:56,097 INFO L124 PetriNetUnfolderBase]: 1285/2032 cut-off events. [2024-06-27 21:07:56,097 INFO L125 PetriNetUnfolderBase]: For 21637/21639 co-relation queries the response was YES. [2024-06-27 21:07:56,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10059 conditions, 2032 events. 1285/2032 cut-off events. For 21637/21639 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9836 event pairs, 381 based on Foata normal form. 2/2031 useless extension candidates. Maximal degree in co-relation 10015. Up to 1667 conditions per place. [2024-06-27 21:07:56,109 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 116 selfloop transitions, 50 changer transitions 0/171 dead transitions. [2024-06-27 21:07:56,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 171 transitions, 1640 flow [2024-06-27 21:07:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:07:56,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:07:56,111 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 984 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:07:56,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 171 transitions, 1640 flow [2024-06-27 21:07:56,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 171 transitions, 1588 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:07:56,133 INFO L231 Difference]: Finished difference. Result has 106 places, 134 transitions, 1190 flow [2024-06-27 21:07:56,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1190, PETRI_PLACES=106, PETRI_TRANSITIONS=134} [2024-06-27 21:07:56,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 21:07:56,134 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 134 transitions, 1190 flow [2024-06-27 21:07:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:56,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:56,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:56,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:07:56,134 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:56,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash 231621497, now seen corresponding path program 3 times [2024-06-27 21:07:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:56,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882603459] [2024-06-27 21:07:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:56,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:58,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882603459] [2024-06-27 21:07:58,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882603459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:58,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:58,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:58,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366362662] [2024-06-27 21:07:58,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:58,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:58,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:59,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:07:59,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 134 transitions, 1190 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:59,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:59,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:07:59,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:00,141 INFO L124 PetriNetUnfolderBase]: 1280/2025 cut-off events. [2024-06-27 21:08:00,141 INFO L125 PetriNetUnfolderBase]: For 24861/24863 co-relation queries the response was YES. [2024-06-27 21:08:00,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10716 conditions, 2025 events. 1280/2025 cut-off events. For 24861/24863 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9769 event pairs, 381 based on Foata normal form. 2/2024 useless extension candidates. Maximal degree in co-relation 10669. Up to 1662 conditions per place. [2024-06-27 21:08:00,154 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 116 selfloop transitions, 48 changer transitions 0/169 dead transitions. [2024-06-27 21:08:00,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 169 transitions, 1681 flow [2024-06-27 21:08:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 21:08:00,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 21:08:00,156 INFO L175 Difference]: Start difference. First operand has 106 places, 134 transitions, 1190 flow. Second operand 8 states and 151 transitions. [2024-06-27 21:08:00,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 169 transitions, 1681 flow [2024-06-27 21:08:00,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 169 transitions, 1637 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 21:08:00,182 INFO L231 Difference]: Finished difference. Result has 112 places, 134 transitions, 1250 flow [2024-06-27 21:08:00,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1250, PETRI_PLACES=112, PETRI_TRANSITIONS=134} [2024-06-27 21:08:00,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-27 21:08:00,183 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 134 transitions, 1250 flow [2024-06-27 21:08:00,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:00,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:00,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:00,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:08:00,184 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:00,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash 522695881, now seen corresponding path program 4 times [2024-06-27 21:08:00,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:00,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247004119] [2024-06-27 21:08:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:00,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:02,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:02,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247004119] [2024-06-27 21:08:02,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247004119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:02,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:02,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:02,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542568922] [2024-06-27 21:08:02,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:02,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:02,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:02,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:02,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:02,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:02,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 134 transitions, 1250 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:02,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:02,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:02,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:04,206 INFO L124 PetriNetUnfolderBase]: 1293/2049 cut-off events. [2024-06-27 21:08:04,206 INFO L125 PetriNetUnfolderBase]: For 27894/27911 co-relation queries the response was YES. [2024-06-27 21:08:04,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11134 conditions, 2049 events. 1293/2049 cut-off events. For 27894/27911 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9935 event pairs, 385 based on Foata normal form. 6/2048 useless extension candidates. Maximal degree in co-relation 11085. Up to 1676 conditions per place. [2024-06-27 21:08:04,217 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 56 changer transitions 0/170 dead transitions. [2024-06-27 21:08:04,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 170 transitions, 1793 flow [2024-06-27 21:08:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:08:04,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:08:04,218 INFO L175 Difference]: Start difference. First operand has 112 places, 134 transitions, 1250 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:08:04,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 170 transitions, 1793 flow [2024-06-27 21:08:04,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 170 transitions, 1674 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:04,238 INFO L231 Difference]: Finished difference. Result has 115 places, 139 transitions, 1335 flow [2024-06-27 21:08:04,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1335, PETRI_PLACES=115, PETRI_TRANSITIONS=139} [2024-06-27 21:08:04,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-27 21:08:04,239 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 139 transitions, 1335 flow [2024-06-27 21:08:04,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:04,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:04,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:04,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:08:04,240 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:04,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1427731321, now seen corresponding path program 5 times [2024-06-27 21:08:04,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:04,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683905565] [2024-06-27 21:08:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:04,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:06,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:06,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683905565] [2024-06-27 21:08:06,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683905565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:06,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:06,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:06,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527081912] [2024-06-27 21:08:06,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:06,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:06,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:06,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:06,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:06,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:06,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 139 transitions, 1335 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:06,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:06,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:06,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:07,613 INFO L124 PetriNetUnfolderBase]: 1306/2074 cut-off events. [2024-06-27 21:08:07,614 INFO L125 PetriNetUnfolderBase]: For 30684/30701 co-relation queries the response was YES. [2024-06-27 21:08:07,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11500 conditions, 2074 events. 1306/2074 cut-off events. For 30684/30701 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10127 event pairs, 385 based on Foata normal form. 6/2073 useless extension candidates. Maximal degree in co-relation 11449. Up to 1690 conditions per place. [2024-06-27 21:08:07,626 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 56 changer transitions 0/173 dead transitions. [2024-06-27 21:08:07,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 173 transitions, 1870 flow [2024-06-27 21:08:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:08:07,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 21:08:07,635 INFO L175 Difference]: Start difference. First operand has 115 places, 139 transitions, 1335 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:08:07,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 173 transitions, 1870 flow [2024-06-27 21:08:07,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 173 transitions, 1782 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:07,666 INFO L231 Difference]: Finished difference. Result has 119 places, 142 transitions, 1408 flow [2024-06-27 21:08:07,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1408, PETRI_PLACES=119, PETRI_TRANSITIONS=142} [2024-06-27 21:08:07,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-27 21:08:07,672 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 142 transitions, 1408 flow [2024-06-27 21:08:07,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:07,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:07,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:07,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:08:07,673 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:07,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:07,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1427736901, now seen corresponding path program 6 times [2024-06-27 21:08:07,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:07,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681225074] [2024-06-27 21:08:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:07,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:10,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:10,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681225074] [2024-06-27 21:08:10,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681225074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:10,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:10,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:10,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133801491] [2024-06-27 21:08:10,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:10,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:10,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:10,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:10,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:10,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:10,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 142 transitions, 1408 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:10,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:10,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:10,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:11,597 INFO L124 PetriNetUnfolderBase]: 1301/2067 cut-off events. [2024-06-27 21:08:11,597 INFO L125 PetriNetUnfolderBase]: For 33097/33114 co-relation queries the response was YES. [2024-06-27 21:08:11,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11578 conditions, 2067 events. 1301/2067 cut-off events. For 33097/33114 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10053 event pairs, 385 based on Foata normal form. 6/2066 useless extension candidates. Maximal degree in co-relation 11526. Up to 1685 conditions per place. [2024-06-27 21:08:11,610 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 111 selfloop transitions, 55 changer transitions 0/171 dead transitions. [2024-06-27 21:08:11,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 171 transitions, 1822 flow [2024-06-27 21:08:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:08:11,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:08:11,612 INFO L175 Difference]: Start difference. First operand has 119 places, 142 transitions, 1408 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:08:11,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 171 transitions, 1822 flow [2024-06-27 21:08:11,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 171 transitions, 1641 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 21:08:11,637 INFO L231 Difference]: Finished difference. Result has 120 places, 142 transitions, 1345 flow [2024-06-27 21:08:11,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1345, PETRI_PLACES=120, PETRI_TRANSITIONS=142} [2024-06-27 21:08:11,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-27 21:08:11,637 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 142 transitions, 1345 flow [2024-06-27 21:08:11,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:11,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:11,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:11,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:08:11,638 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:11,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash 738986115, now seen corresponding path program 1 times [2024-06-27 21:08:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:11,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622163922] [2024-06-27 21:08:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:11,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:14,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:14,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622163922] [2024-06-27 21:08:14,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622163922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:14,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:14,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:14,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124245243] [2024-06-27 21:08:14,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:14,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:14,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:14,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:14,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:08:14,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 142 transitions, 1345 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:14,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:14,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:08:14,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:16,022 INFO L124 PetriNetUnfolderBase]: 1307/2102 cut-off events. [2024-06-27 21:08:16,023 INFO L125 PetriNetUnfolderBase]: For 39650/39676 co-relation queries the response was YES. [2024-06-27 21:08:16,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12019 conditions, 2102 events. 1307/2102 cut-off events. For 39650/39676 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10585 event pairs, 212 based on Foata normal form. 20/2076 useless extension candidates. Maximal degree in co-relation 11967. Up to 1677 conditions per place. [2024-06-27 21:08:16,035 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 118 selfloop transitions, 48 changer transitions 0/192 dead transitions. [2024-06-27 21:08:16,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 192 transitions, 1941 flow [2024-06-27 21:08:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 21:08:16,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 21:08:16,036 INFO L175 Difference]: Start difference. First operand has 120 places, 142 transitions, 1345 flow. Second operand 9 states and 172 transitions. [2024-06-27 21:08:16,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 192 transitions, 1941 flow [2024-06-27 21:08:16,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 192 transitions, 1818 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:16,062 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1381 flow [2024-06-27 21:08:16,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1381, PETRI_PLACES=123, PETRI_TRANSITIONS=146} [2024-06-27 21:08:16,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-27 21:08:16,063 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1381 flow [2024-06-27 21:08:16,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:16,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:16,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:16,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:08:16,063 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:16,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1258038173, now seen corresponding path program 2 times [2024-06-27 21:08:16,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:16,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501323035] [2024-06-27 21:08:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:16,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:18,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:18,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501323035] [2024-06-27 21:08:18,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501323035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:18,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:18,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:18,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467070906] [2024-06-27 21:08:18,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:18,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:18,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:18,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:18,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:08:18,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 146 transitions, 1381 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:18,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:18,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:08:18,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:19,900 INFO L124 PetriNetUnfolderBase]: 1295/2084 cut-off events. [2024-06-27 21:08:19,900 INFO L125 PetriNetUnfolderBase]: For 42273/42306 co-relation queries the response was YES. [2024-06-27 21:08:19,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12059 conditions, 2084 events. 1295/2084 cut-off events. For 42273/42306 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10500 event pairs, 297 based on Foata normal form. 18/2057 useless extension candidates. Maximal degree in co-relation 12006. Up to 1758 conditions per place. [2024-06-27 21:08:19,914 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 44 changer transitions 0/184 dead transitions. [2024-06-27 21:08:19,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 184 transitions, 1809 flow [2024-06-27 21:08:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:08:19,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:08:19,916 INFO L175 Difference]: Start difference. First operand has 123 places, 146 transitions, 1381 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:08:19,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 184 transitions, 1809 flow [2024-06-27 21:08:19,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 184 transitions, 1712 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:19,947 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1382 flow [2024-06-27 21:08:19,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1382, PETRI_PLACES=126, PETRI_TRANSITIONS=146} [2024-06-27 21:08:19,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-27 21:08:19,948 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1382 flow [2024-06-27 21:08:19,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:19,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:19,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:19,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:08:19,948 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:19,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1263389615, now seen corresponding path program 3 times [2024-06-27 21:08:19,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:19,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008702628] [2024-06-27 21:08:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:19,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:23,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:23,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008702628] [2024-06-27 21:08:23,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008702628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:23,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:23,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:23,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960346562] [2024-06-27 21:08:23,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:23,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:23,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:23,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:23,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:23,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:08:23,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 146 transitions, 1382 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:23,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:23,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:08:23,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:24,658 INFO L124 PetriNetUnfolderBase]: 1319/2121 cut-off events. [2024-06-27 21:08:24,658 INFO L125 PetriNetUnfolderBase]: For 46246/46265 co-relation queries the response was YES. [2024-06-27 21:08:24,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12393 conditions, 2121 events. 1319/2121 cut-off events. For 46246/46265 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10748 event pairs, 308 based on Foata normal form. 6/2074 useless extension candidates. Maximal degree in co-relation 12338. Up to 1729 conditions per place. [2024-06-27 21:08:24,671 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 61 changer transitions 0/181 dead transitions. [2024-06-27 21:08:24,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 181 transitions, 1814 flow [2024-06-27 21:08:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:08:24,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:08:24,673 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1382 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:08:24,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 181 transitions, 1814 flow [2024-06-27 21:08:24,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 181 transitions, 1716 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:08:24,708 INFO L231 Difference]: Finished difference. Result has 127 places, 148 transitions, 1448 flow [2024-06-27 21:08:24,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1448, PETRI_PLACES=127, PETRI_TRANSITIONS=148} [2024-06-27 21:08:24,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-27 21:08:24,709 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 148 transitions, 1448 flow [2024-06-27 21:08:24,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:24,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:24,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:24,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:08:24,709 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:24,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:24,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1263204917, now seen corresponding path program 1 times [2024-06-27 21:08:24,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:24,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60692645] [2024-06-27 21:08:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:27,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:27,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60692645] [2024-06-27 21:08:27,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60692645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:27,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:27,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:27,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632395327] [2024-06-27 21:08:27,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:27,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:27,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:27,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:27,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:27,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:27,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 148 transitions, 1448 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:27,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:27,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:27,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:28,938 INFO L124 PetriNetUnfolderBase]: 1405/2235 cut-off events. [2024-06-27 21:08:28,938 INFO L125 PetriNetUnfolderBase]: For 46487/46499 co-relation queries the response was YES. [2024-06-27 21:08:28,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12932 conditions, 2235 events. 1405/2235 cut-off events. For 46487/46499 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11117 event pairs, 346 based on Foata normal form. 16/2248 useless extension candidates. Maximal degree in co-relation 12876. Up to 1990 conditions per place. [2024-06-27 21:08:28,951 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 30 changer transitions 0/185 dead transitions. [2024-06-27 21:08:28,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 1926 flow [2024-06-27 21:08:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:08:28,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:08:28,952 INFO L175 Difference]: Start difference. First operand has 127 places, 148 transitions, 1448 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:08:28,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 1926 flow [2024-06-27 21:08:28,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 185 transitions, 1782 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:28,992 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 1389 flow [2024-06-27 21:08:28,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1389, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2024-06-27 21:08:28,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 21:08:28,992 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 1389 flow [2024-06-27 21:08:28,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:28,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:28,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:28,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:08:28,993 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:28,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:28,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1204374357, now seen corresponding path program 4 times [2024-06-27 21:08:28,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:28,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025092026] [2024-06-27 21:08:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:28,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:31,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:31,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025092026] [2024-06-27 21:08:31,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025092026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:31,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:31,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670717322] [2024-06-27 21:08:31,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:31,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:31,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:31,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:08:31,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 1389 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:31,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:31,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:08:31,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:33,050 INFO L124 PetriNetUnfolderBase]: 1330/2137 cut-off events. [2024-06-27 21:08:33,051 INFO L125 PetriNetUnfolderBase]: For 51774/51812 co-relation queries the response was YES. [2024-06-27 21:08:33,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12704 conditions, 2137 events. 1330/2137 cut-off events. For 51774/51812 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10764 event pairs, 312 based on Foata normal form. 10/2087 useless extension candidates. Maximal degree in co-relation 12647. Up to 1745 conditions per place. [2024-06-27 21:08:33,064 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 61 changer transitions 0/182 dead transitions. [2024-06-27 21:08:33,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 1817 flow [2024-06-27 21:08:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:08:33,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 21:08:33,066 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 1389 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:08:33,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 1817 flow [2024-06-27 21:08:33,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 182 transitions, 1750 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:33,105 INFO L231 Difference]: Finished difference. Result has 131 places, 152 transitions, 1490 flow [2024-06-27 21:08:33,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1490, PETRI_PLACES=131, PETRI_TRANSITIONS=152} [2024-06-27 21:08:33,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-27 21:08:33,106 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 152 transitions, 1490 flow [2024-06-27 21:08:33,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:33,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:33,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:33,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:08:33,107 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:33,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1538080485, now seen corresponding path program 2 times [2024-06-27 21:08:33,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:33,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371180082] [2024-06-27 21:08:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:33,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:35,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:35,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371180082] [2024-06-27 21:08:35,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371180082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:35,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:35,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:35,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065948893] [2024-06-27 21:08:35,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:35,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:35,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:35,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:35,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:35,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:35,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 152 transitions, 1490 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:35,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:35,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:35,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:36,566 INFO L124 PetriNetUnfolderBase]: 1412/2250 cut-off events. [2024-06-27 21:08:36,566 INFO L125 PetriNetUnfolderBase]: For 51605/51633 co-relation queries the response was YES. [2024-06-27 21:08:36,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13230 conditions, 2250 events. 1412/2250 cut-off events. For 51605/51633 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11301 event pairs, 340 based on Foata normal form. 24/2270 useless extension candidates. Maximal degree in co-relation 13172. Up to 2003 conditions per place. [2024-06-27 21:08:36,581 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-06-27 21:08:36,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 186 transitions, 1966 flow [2024-06-27 21:08:36,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:08:36,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:08:36,583 INFO L175 Difference]: Start difference. First operand has 131 places, 152 transitions, 1490 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:08:36,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 186 transitions, 1966 flow [2024-06-27 21:08:36,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 186 transitions, 1818 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:36,614 INFO L231 Difference]: Finished difference. Result has 133 places, 154 transitions, 1433 flow [2024-06-27 21:08:36,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1433, PETRI_PLACES=133, PETRI_TRANSITIONS=154} [2024-06-27 21:08:36,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-27 21:08:36,615 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 154 transitions, 1433 flow [2024-06-27 21:08:36,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:36,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:36,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:36,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:08:36,615 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:36,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:36,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1310179335, now seen corresponding path program 3 times [2024-06-27 21:08:36,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:36,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74178563] [2024-06-27 21:08:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:36,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:39,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:39,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74178563] [2024-06-27 21:08:39,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74178563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:39,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:39,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:39,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523977604] [2024-06-27 21:08:39,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:39,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:39,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:39,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:39,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 154 transitions, 1433 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:39,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:39,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:39,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:40,823 INFO L124 PetriNetUnfolderBase]: 1432/2282 cut-off events. [2024-06-27 21:08:40,824 INFO L125 PetriNetUnfolderBase]: For 54602/54630 co-relation queries the response was YES. [2024-06-27 21:08:40,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13451 conditions, 2282 events. 1432/2282 cut-off events. For 54602/54630 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11412 event pairs, 346 based on Foata normal form. 24/2302 useless extension candidates. Maximal degree in co-relation 13392. Up to 2035 conditions per place. [2024-06-27 21:08:40,841 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 30 changer transitions 0/188 dead transitions. [2024-06-27 21:08:40,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 188 transitions, 1917 flow [2024-06-27 21:08:40,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:08:40,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 21:08:40,842 INFO L175 Difference]: Start difference. First operand has 133 places, 154 transitions, 1433 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:08:40,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 188 transitions, 1917 flow [2024-06-27 21:08:40,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 188 transitions, 1844 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:40,881 INFO L231 Difference]: Finished difference. Result has 135 places, 156 transitions, 1453 flow [2024-06-27 21:08:40,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1453, PETRI_PLACES=135, PETRI_TRANSITIONS=156} [2024-06-27 21:08:40,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-27 21:08:40,882 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 156 transitions, 1453 flow [2024-06-27 21:08:40,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:40,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:40,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:40,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:08:40,883 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:40,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:40,883 INFO L85 PathProgramCache]: Analyzing trace with hash -912415551, now seen corresponding path program 4 times [2024-06-27 21:08:40,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:40,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656252604] [2024-06-27 21:08:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:40,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:43,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:43,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656252604] [2024-06-27 21:08:43,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656252604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:43,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:43,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:43,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684838259] [2024-06-27 21:08:43,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:43,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:43,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:43,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:43,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:43,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:43,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 156 transitions, 1453 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:43,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:43,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:43,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:44,364 INFO L124 PetriNetUnfolderBase]: 1424/2270 cut-off events. [2024-06-27 21:08:44,364 INFO L125 PetriNetUnfolderBase]: For 56950/56978 co-relation queries the response was YES. [2024-06-27 21:08:44,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13522 conditions, 2270 events. 1424/2270 cut-off events. For 56950/56978 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11358 event pairs, 308 based on Foata normal form. 24/2290 useless extension candidates. Maximal degree in co-relation 13462. Up to 1929 conditions per place. [2024-06-27 21:08:44,379 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 148 selfloop transitions, 38 changer transitions 0/191 dead transitions. [2024-06-27 21:08:44,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 191 transitions, 1949 flow [2024-06-27 21:08:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:08:44,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 21:08:44,381 INFO L175 Difference]: Start difference. First operand has 135 places, 156 transitions, 1453 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:08:44,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 191 transitions, 1949 flow [2024-06-27 21:08:44,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 191 transitions, 1874 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:44,425 INFO L231 Difference]: Finished difference. Result has 137 places, 158 transitions, 1491 flow [2024-06-27 21:08:44,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1491, PETRI_PLACES=137, PETRI_TRANSITIONS=158} [2024-06-27 21:08:44,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-27 21:08:44,426 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 158 transitions, 1491 flow [2024-06-27 21:08:44,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:44,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:44,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:44,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:08:44,426 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:44,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1995386856, now seen corresponding path program 1 times [2024-06-27 21:08:44,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:44,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343103781] [2024-06-27 21:08:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:44,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:45,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:45,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343103781] [2024-06-27 21:08:45,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343103781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:45,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:45,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:08:45,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565215441] [2024-06-27 21:08:45,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:45,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:08:45,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:08:45,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:08:45,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:08:45,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 158 transitions, 1491 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:45,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:45,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:08:45,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:46,692 INFO L124 PetriNetUnfolderBase]: 1314/2145 cut-off events. [2024-06-27 21:08:46,692 INFO L125 PetriNetUnfolderBase]: For 57997/58031 co-relation queries the response was YES. [2024-06-27 21:08:46,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12975 conditions, 2145 events. 1314/2145 cut-off events. For 57997/58031 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11133 event pairs, 343 based on Foata normal form. 34/2175 useless extension candidates. Maximal degree in co-relation 12914. Up to 1925 conditions per place. [2024-06-27 21:08:46,709 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 141 selfloop transitions, 10 changer transitions 0/172 dead transitions. [2024-06-27 21:08:46,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 172 transitions, 1843 flow [2024-06-27 21:08:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:08:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:08:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 21:08:46,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:08:46,710 INFO L175 Difference]: Start difference. First operand has 137 places, 158 transitions, 1491 flow. Second operand 5 states and 90 transitions. [2024-06-27 21:08:46,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 172 transitions, 1843 flow [2024-06-27 21:08:46,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 172 transitions, 1748 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:46,758 INFO L231 Difference]: Finished difference. Result has 136 places, 161 transitions, 1448 flow [2024-06-27 21:08:46,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1448, PETRI_PLACES=136, PETRI_TRANSITIONS=161} [2024-06-27 21:08:46,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-27 21:08:46,759 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 161 transitions, 1448 flow [2024-06-27 21:08:46,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:46,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:46,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:46,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:08:46,759 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:46,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:46,760 INFO L85 PathProgramCache]: Analyzing trace with hash -117767908, now seen corresponding path program 1 times [2024-06-27 21:08:46,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:46,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728444658] [2024-06-27 21:08:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:46,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:50,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:50,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728444658] [2024-06-27 21:08:50,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728444658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:50,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:50,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:50,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288341194] [2024-06-27 21:08:50,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:50,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:50,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:50,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:50,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 161 transitions, 1448 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:50,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:50,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:50,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:51,275 INFO L124 PetriNetUnfolderBase]: 1562/2516 cut-off events. [2024-06-27 21:08:51,275 INFO L125 PetriNetUnfolderBase]: For 73029/73041 co-relation queries the response was YES. [2024-06-27 21:08:51,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15212 conditions, 2516 events. 1562/2516 cut-off events. For 73029/73041 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13208 event pairs, 255 based on Foata normal form. 24/2538 useless extension candidates. Maximal degree in co-relation 15150. Up to 1924 conditions per place. [2024-06-27 21:08:51,296 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 28 changer transitions 0/224 dead transitions. [2024-06-27 21:08:51,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 224 transitions, 2248 flow [2024-06-27 21:08:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:08:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:08:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 21:08:51,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 21:08:51,298 INFO L175 Difference]: Start difference. First operand has 136 places, 161 transitions, 1448 flow. Second operand 10 states and 185 transitions. [2024-06-27 21:08:51,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 224 transitions, 2248 flow [2024-06-27 21:08:51,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 224 transitions, 2218 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:08:51,350 INFO L231 Difference]: Finished difference. Result has 145 places, 166 transitions, 1557 flow [2024-06-27 21:08:51,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1557, PETRI_PLACES=145, PETRI_TRANSITIONS=166} [2024-06-27 21:08:51,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-27 21:08:51,351 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 166 transitions, 1557 flow [2024-06-27 21:08:51,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:51,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:51,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:51,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:08:51,352 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:51,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:51,352 INFO L85 PathProgramCache]: Analyzing trace with hash 123878390, now seen corresponding path program 2 times [2024-06-27 21:08:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:51,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351284315] [2024-06-27 21:08:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:51,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:54,730 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 21:08:54,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:54,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351284315] [2024-06-27 21:08:54,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351284315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:54,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:54,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:54,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867274979] [2024-06-27 21:08:54,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:54,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:54,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:54,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:54,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:54,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 166 transitions, 1557 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:54,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:54,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:54,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:56,049 INFO L124 PetriNetUnfolderBase]: 1610/2600 cut-off events. [2024-06-27 21:08:56,049 INFO L125 PetriNetUnfolderBase]: For 78234/78246 co-relation queries the response was YES. [2024-06-27 21:08:56,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15960 conditions, 2600 events. 1610/2600 cut-off events. For 78234/78246 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13740 event pairs, 354 based on Foata normal form. 24/2622 useless extension candidates. Maximal degree in co-relation 15895. Up to 2102 conditions per place. [2024-06-27 21:08:56,066 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 26 changer transitions 0/220 dead transitions. [2024-06-27 21:08:56,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 220 transitions, 2316 flow [2024-06-27 21:08:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:08:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:08:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:08:56,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:08:56,068 INFO L175 Difference]: Start difference. First operand has 145 places, 166 transitions, 1557 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:08:56,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 220 transitions, 2316 flow [2024-06-27 21:08:56,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 220 transitions, 2262 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:56,133 INFO L231 Difference]: Finished difference. Result has 150 places, 169 transitions, 1614 flow [2024-06-27 21:08:56,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1614, PETRI_PLACES=150, PETRI_TRANSITIONS=169} [2024-06-27 21:08:56,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-27 21:08:56,134 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 169 transitions, 1614 flow [2024-06-27 21:08:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:56,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:56,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:56,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:08:56,135 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:56,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash 210718070, now seen corresponding path program 3 times [2024-06-27 21:08:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:56,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968670147] [2024-06-27 21:08:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:56,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:59,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:59,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968670147] [2024-06-27 21:08:59,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968670147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:59,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:59,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:59,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709048471] [2024-06-27 21:08:59,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:59,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:59,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:59,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:59,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:59,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:08:59,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 169 transitions, 1614 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:59,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:59,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:08:59,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:00,667 INFO L124 PetriNetUnfolderBase]: 1582/2556 cut-off events. [2024-06-27 21:09:00,668 INFO L125 PetriNetUnfolderBase]: For 78122/78134 co-relation queries the response was YES. [2024-06-27 21:09:00,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15518 conditions, 2556 events. 1582/2556 cut-off events. For 78122/78134 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13505 event pairs, 358 based on Foata normal form. 28/2582 useless extension candidates. Maximal degree in co-relation 15450. Up to 2206 conditions per place. [2024-06-27 21:09:00,687 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 26 changer transitions 0/216 dead transitions. [2024-06-27 21:09:00,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 216 transitions, 2208 flow [2024-06-27 21:09:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:09:00,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 21:09:00,690 INFO L175 Difference]: Start difference. First operand has 150 places, 169 transitions, 1614 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:09:00,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 216 transitions, 2208 flow [2024-06-27 21:09:00,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 216 transitions, 2138 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:00,753 INFO L231 Difference]: Finished difference. Result has 154 places, 170 transitions, 1627 flow [2024-06-27 21:09:00,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1627, PETRI_PLACES=154, PETRI_TRANSITIONS=170} [2024-06-27 21:09:00,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 21:09:00,755 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 170 transitions, 1627 flow [2024-06-27 21:09:00,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:00,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:00,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:00,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:09:00,756 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:00,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:00,756 INFO L85 PathProgramCache]: Analyzing trace with hash -504860576, now seen corresponding path program 4 times [2024-06-27 21:09:00,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:00,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254159730] [2024-06-27 21:09:00,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:00,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:04,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:04,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254159730] [2024-06-27 21:09:04,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254159730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:04,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:04,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:04,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660953359] [2024-06-27 21:09:04,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:04,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:04,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:04,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:04,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:04,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:04,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 170 transitions, 1627 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:04,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:04,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:04,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:06,013 INFO L124 PetriNetUnfolderBase]: 1650/2681 cut-off events. [2024-06-27 21:09:06,013 INFO L125 PetriNetUnfolderBase]: For 82538/82540 co-relation queries the response was YES. [2024-06-27 21:09:06,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16104 conditions, 2681 events. 1650/2681 cut-off events. For 82538/82540 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14489 event pairs, 394 based on Foata normal form. 16/2694 useless extension candidates. Maximal degree in co-relation 16034. Up to 2162 conditions per place. [2024-06-27 21:09:06,033 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 58 changer transitions 0/212 dead transitions. [2024-06-27 21:09:06,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 212 transitions, 2189 flow [2024-06-27 21:09:06,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:09:06,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 21:09:06,034 INFO L175 Difference]: Start difference. First operand has 154 places, 170 transitions, 1627 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:09:06,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 212 transitions, 2189 flow [2024-06-27 21:09:06,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 212 transitions, 2140 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:06,104 INFO L231 Difference]: Finished difference. Result has 156 places, 171 transitions, 1721 flow [2024-06-27 21:09:06,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1721, PETRI_PLACES=156, PETRI_TRANSITIONS=171} [2024-06-27 21:09:06,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-27 21:09:06,105 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 171 transitions, 1721 flow [2024-06-27 21:09:06,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:06,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:06,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:06,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:09:06,105 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:06,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:06,106 INFO L85 PathProgramCache]: Analyzing trace with hash -510222956, now seen corresponding path program 5 times [2024-06-27 21:09:06,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:06,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948381483] [2024-06-27 21:09:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:06,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:09,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:09,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948381483] [2024-06-27 21:09:09,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948381483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:09,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:09,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:09,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811069993] [2024-06-27 21:09:09,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:09,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:09,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:09,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:09,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:09,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 171 transitions, 1721 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:09,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:09,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:09,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:10,854 INFO L124 PetriNetUnfolderBase]: 1718/2809 cut-off events. [2024-06-27 21:09:10,855 INFO L125 PetriNetUnfolderBase]: For 88758/88760 co-relation queries the response was YES. [2024-06-27 21:09:10,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16944 conditions, 2809 events. 1718/2809 cut-off events. For 88758/88760 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15509 event pairs, 412 based on Foata normal form. 16/2822 useless extension candidates. Maximal degree in co-relation 16873. Up to 2278 conditions per place. [2024-06-27 21:09:10,877 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 152 selfloop transitions, 56 changer transitions 0/213 dead transitions. [2024-06-27 21:09:10,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 213 transitions, 2287 flow [2024-06-27 21:09:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:09:10,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 21:09:10,882 INFO L175 Difference]: Start difference. First operand has 156 places, 171 transitions, 1721 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:09:10,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 213 transitions, 2287 flow [2024-06-27 21:09:10,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 213 transitions, 2162 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:10,988 INFO L231 Difference]: Finished difference. Result has 158 places, 172 transitions, 1737 flow [2024-06-27 21:09:10,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1737, PETRI_PLACES=158, PETRI_TRANSITIONS=172} [2024-06-27 21:09:10,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-27 21:09:10,989 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 172 transitions, 1737 flow [2024-06-27 21:09:10,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:10,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:10,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:10,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:09:10,990 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:10,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:10,990 INFO L85 PathProgramCache]: Analyzing trace with hash -750143174, now seen corresponding path program 6 times [2024-06-27 21:09:10,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:10,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011545599] [2024-06-27 21:09:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:14,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:14,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011545599] [2024-06-27 21:09:14,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011545599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:14,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:14,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:14,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012591970] [2024-06-27 21:09:14,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:14,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:14,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:14,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:14,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:14,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:14,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 172 transitions, 1737 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:14,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:14,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:14,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:15,522 INFO L124 PetriNetUnfolderBase]: 1766/2893 cut-off events. [2024-06-27 21:09:15,523 INFO L125 PetriNetUnfolderBase]: For 91731/91733 co-relation queries the response was YES. [2024-06-27 21:09:15,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17380 conditions, 2893 events. 1766/2893 cut-off events. For 91731/91733 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16091 event pairs, 404 based on Foata normal form. 12/2902 useless extension candidates. Maximal degree in co-relation 17308. Up to 2144 conditions per place. [2024-06-27 21:09:15,543 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 59 changer transitions 0/219 dead transitions. [2024-06-27 21:09:15,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 219 transitions, 2357 flow [2024-06-27 21:09:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:09:15,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 21:09:15,545 INFO L175 Difference]: Start difference. First operand has 158 places, 172 transitions, 1737 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:09:15,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 219 transitions, 2357 flow [2024-06-27 21:09:15,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 219 transitions, 2234 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:15,625 INFO L231 Difference]: Finished difference. Result has 161 places, 175 transitions, 1799 flow [2024-06-27 21:09:15,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1799, PETRI_PLACES=161, PETRI_TRANSITIONS=175} [2024-06-27 21:09:15,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-27 21:09:15,626 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 175 transitions, 1799 flow [2024-06-27 21:09:15,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:15,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:15,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:15,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:09:15,626 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:15,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash 488732876, now seen corresponding path program 1 times [2024-06-27 21:09:15,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:15,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875626585] [2024-06-27 21:09:15,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:15,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:19,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:19,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875626585] [2024-06-27 21:09:19,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875626585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:19,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:19,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:19,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979013582] [2024-06-27 21:09:19,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:19,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:19,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:19,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:19,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:19,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:19,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 175 transitions, 1799 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:19,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:19,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:19,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:20,793 INFO L124 PetriNetUnfolderBase]: 1814/2977 cut-off events. [2024-06-27 21:09:20,794 INFO L125 PetriNetUnfolderBase]: For 97289/97291 co-relation queries the response was YES. [2024-06-27 21:09:20,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17919 conditions, 2977 events. 1814/2977 cut-off events. For 97289/97291 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16708 event pairs, 414 based on Foata normal form. 12/2986 useless extension candidates. Maximal degree in co-relation 17845. Up to 2116 conditions per place. [2024-06-27 21:09:20,816 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 153 selfloop transitions, 62 changer transitions 0/220 dead transitions. [2024-06-27 21:09:20,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 220 transitions, 2399 flow [2024-06-27 21:09:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:09:20,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:09:20,821 INFO L175 Difference]: Start difference. First operand has 161 places, 175 transitions, 1799 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:09:20,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 220 transitions, 2399 flow [2024-06-27 21:09:20,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 220 transitions, 2306 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:20,939 INFO L231 Difference]: Finished difference. Result has 165 places, 176 transitions, 1862 flow [2024-06-27 21:09:20,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1862, PETRI_PLACES=165, PETRI_TRANSITIONS=176} [2024-06-27 21:09:20,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-27 21:09:20,941 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 176 transitions, 1862 flow [2024-06-27 21:09:20,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:20,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:20,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:20,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:09:20,941 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:20,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash -200386520, now seen corresponding path program 7 times [2024-06-27 21:09:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:20,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656575361] [2024-06-27 21:09:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:20,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:24,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:24,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656575361] [2024-06-27 21:09:24,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656575361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:24,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:24,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:24,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249040285] [2024-06-27 21:09:24,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:24,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:24,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:24,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:24,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:24,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:24,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 176 transitions, 1862 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:24,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:24,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:24,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:25,598 INFO L124 PetriNetUnfolderBase]: 1882/3104 cut-off events. [2024-06-27 21:09:25,598 INFO L125 PetriNetUnfolderBase]: For 105772/105789 co-relation queries the response was YES. [2024-06-27 21:09:25,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18817 conditions, 3104 events. 1882/3104 cut-off events. For 105772/105789 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17744 event pairs, 458 based on Foata normal form. 20/3117 useless extension candidates. Maximal degree in co-relation 18741. Up to 2562 conditions per place. [2024-06-27 21:09:25,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 150 selfloop transitions, 60 changer transitions 0/215 dead transitions. [2024-06-27 21:09:25,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 215 transitions, 2430 flow [2024-06-27 21:09:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:09:25,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:09:25,629 INFO L175 Difference]: Start difference. First operand has 165 places, 176 transitions, 1862 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:09:25,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 215 transitions, 2430 flow [2024-06-27 21:09:25,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 215 transitions, 2288 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:25,724 INFO L231 Difference]: Finished difference. Result has 167 places, 177 transitions, 1875 flow [2024-06-27 21:09:25,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1875, PETRI_PLACES=167, PETRI_TRANSITIONS=177} [2024-06-27 21:09:25,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-27 21:09:25,724 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 177 transitions, 1875 flow [2024-06-27 21:09:25,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:25,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:25,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:25,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:09:25,725 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:25,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:25,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1255990456, now seen corresponding path program 8 times [2024-06-27 21:09:25,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:25,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458810411] [2024-06-27 21:09:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:25,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:29,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:29,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458810411] [2024-06-27 21:09:29,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458810411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:29,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:29,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:29,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855988315] [2024-06-27 21:09:29,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:29,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:29,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:29,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:29,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:29,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:29,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 177 transitions, 1875 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:29,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:29,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:29,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:30,608 INFO L124 PetriNetUnfolderBase]: 1950/3220 cut-off events. [2024-06-27 21:09:30,608 INFO L125 PetriNetUnfolderBase]: For 111896/111913 co-relation queries the response was YES. [2024-06-27 21:09:30,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19409 conditions, 3220 events. 1950/3220 cut-off events. For 111896/111913 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18665 event pairs, 470 based on Foata normal form. 20/3233 useless extension candidates. Maximal degree in co-relation 19332. Up to 2678 conditions per place. [2024-06-27 21:09:30,630 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 56 changer transitions 0/216 dead transitions. [2024-06-27 21:09:30,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 216 transitions, 2447 flow [2024-06-27 21:09:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:09:30,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 21:09:30,632 INFO L175 Difference]: Start difference. First operand has 167 places, 177 transitions, 1875 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:09:30,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 216 transitions, 2447 flow [2024-06-27 21:09:30,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 216 transitions, 2310 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:30,724 INFO L231 Difference]: Finished difference. Result has 169 places, 178 transitions, 1887 flow [2024-06-27 21:09:30,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1887, PETRI_PLACES=169, PETRI_TRANSITIONS=178} [2024-06-27 21:09:30,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 21:09:30,724 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 178 transitions, 1887 flow [2024-06-27 21:09:30,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:30,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:30,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:30,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:09:30,725 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:30,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:30,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1955277528, now seen corresponding path program 9 times [2024-06-27 21:09:30,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:30,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486374645] [2024-06-27 21:09:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:30,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:34,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:34,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486374645] [2024-06-27 21:09:34,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486374645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:34,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:34,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:34,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527708549] [2024-06-27 21:09:34,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:34,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:34,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:34,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:34,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:34,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:34,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 178 transitions, 1887 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:34,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:34,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:34,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:35,823 INFO L124 PetriNetUnfolderBase]: 2018/3348 cut-off events. [2024-06-27 21:09:35,823 INFO L125 PetriNetUnfolderBase]: For 118367/118384 co-relation queries the response was YES. [2024-06-27 21:09:35,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20011 conditions, 3348 events. 2018/3348 cut-off events. For 118367/118384 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19672 event pairs, 488 based on Foata normal form. 20/3361 useless extension candidates. Maximal degree in co-relation 19933. Up to 2794 conditions per place. [2024-06-27 21:09:35,846 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 57 changer transitions 0/217 dead transitions. [2024-06-27 21:09:35,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 217 transitions, 2463 flow [2024-06-27 21:09:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:35,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:09:35,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:09:35,848 INFO L175 Difference]: Start difference. First operand has 169 places, 178 transitions, 1887 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:09:35,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 217 transitions, 2463 flow [2024-06-27 21:09:35,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 217 transitions, 2332 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:35,959 INFO L231 Difference]: Finished difference. Result has 171 places, 179 transitions, 1909 flow [2024-06-27 21:09:35,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1909, PETRI_PLACES=171, PETRI_TRANSITIONS=179} [2024-06-27 21:09:35,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-27 21:09:35,960 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 179 transitions, 1909 flow [2024-06-27 21:09:35,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:35,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:35,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:35,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:09:35,960 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:35,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1955129658, now seen corresponding path program 10 times [2024-06-27 21:09:35,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319898781] [2024-06-27 21:09:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:39,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:39,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319898781] [2024-06-27 21:09:39,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319898781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:39,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:39,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:39,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302858054] [2024-06-27 21:09:39,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:39,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:39,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:39,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:39,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:39,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:39,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 179 transitions, 1909 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:39,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:39,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:39,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:40,898 INFO L124 PetriNetUnfolderBase]: 2038/3388 cut-off events. [2024-06-27 21:09:40,899 INFO L125 PetriNetUnfolderBase]: For 117750/117767 co-relation queries the response was YES. [2024-06-27 21:09:40,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20039 conditions, 3388 events. 2038/3388 cut-off events. For 117750/117767 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19972 event pairs, 478 based on Foata normal form. 16/3397 useless extension candidates. Maximal degree in co-relation 19960. Up to 2504 conditions per place. [2024-06-27 21:09:40,932 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 61 changer transitions 0/223 dead transitions. [2024-06-27 21:09:40,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 223 transitions, 2549 flow [2024-06-27 21:09:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:09:40,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:09:40,942 INFO L175 Difference]: Start difference. First operand has 171 places, 179 transitions, 1909 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:09:40,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 223 transitions, 2549 flow [2024-06-27 21:09:41,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 223 transitions, 2414 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:41,081 INFO L231 Difference]: Finished difference. Result has 174 places, 182 transitions, 1986 flow [2024-06-27 21:09:41,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1986, PETRI_PLACES=174, PETRI_TRANSITIONS=182} [2024-06-27 21:09:41,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-27 21:09:41,082 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 182 transitions, 1986 flow [2024-06-27 21:09:41,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:41,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:41,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:41,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:09:41,082 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:41,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1960855110, now seen corresponding path program 2 times [2024-06-27 21:09:41,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:41,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690877517] [2024-06-27 21:09:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:41,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:44,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:44,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690877517] [2024-06-27 21:09:44,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690877517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:44,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:44,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:44,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136644776] [2024-06-27 21:09:44,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:44,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:44,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:44,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:44,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 182 transitions, 1986 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:44,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:44,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:44,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:45,749 INFO L124 PetriNetUnfolderBase]: 2086/3484 cut-off events. [2024-06-27 21:09:45,749 INFO L125 PetriNetUnfolderBase]: For 123718/123735 co-relation queries the response was YES. [2024-06-27 21:09:45,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20588 conditions, 3484 events. 2086/3484 cut-off events. For 123718/123735 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20793 event pairs, 498 based on Foata normal form. 16/3493 useless extension candidates. Maximal degree in co-relation 20507. Up to 2700 conditions per place. [2024-06-27 21:09:45,780 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 160 selfloop transitions, 59 changer transitions 0/224 dead transitions. [2024-06-27 21:09:45,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 224 transitions, 2596 flow [2024-06-27 21:09:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:09:45,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:09:45,783 INFO L175 Difference]: Start difference. First operand has 174 places, 182 transitions, 1986 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:09:45,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 224 transitions, 2596 flow [2024-06-27 21:09:45,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 224 transitions, 2483 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:45,915 INFO L231 Difference]: Finished difference. Result has 178 places, 183 transitions, 2033 flow [2024-06-27 21:09:45,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2033, PETRI_PLACES=178, PETRI_TRANSITIONS=183} [2024-06-27 21:09:45,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-27 21:09:45,915 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 183 transitions, 2033 flow [2024-06-27 21:09:45,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:45,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:45,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:45,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:09:45,916 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:45,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:45,916 INFO L85 PathProgramCache]: Analyzing trace with hash 435856168, now seen corresponding path program 3 times [2024-06-27 21:09:45,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:45,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122198619] [2024-06-27 21:09:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:45,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:48,970 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 21:09:48,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:48,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122198619] [2024-06-27 21:09:48,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122198619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:48,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:48,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:48,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695609575] [2024-06-27 21:09:48,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:48,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:48,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:48,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:48,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:49,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:49,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 183 transitions, 2033 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:49,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:49,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:49,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:50,389 INFO L124 PetriNetUnfolderBase]: 2134/3580 cut-off events. [2024-06-27 21:09:50,390 INFO L125 PetriNetUnfolderBase]: For 129747/129764 co-relation queries the response was YES. [2024-06-27 21:09:50,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21257 conditions, 3580 events. 2134/3580 cut-off events. For 129747/129764 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21622 event pairs, 516 based on Foata normal form. 16/3589 useless extension candidates. Maximal degree in co-relation 21174. Up to 2896 conditions per place. [2024-06-27 21:09:50,421 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 158 selfloop transitions, 62 changer transitions 0/225 dead transitions. [2024-06-27 21:09:50,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 225 transitions, 2647 flow [2024-06-27 21:09:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:09:50,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:09:50,424 INFO L175 Difference]: Start difference. First operand has 178 places, 183 transitions, 2033 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:09:50,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 225 transitions, 2647 flow [2024-06-27 21:09:50,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 225 transitions, 2501 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:50,576 INFO L231 Difference]: Finished difference. Result has 180 places, 184 transitions, 2055 flow [2024-06-27 21:09:50,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2055, PETRI_PLACES=180, PETRI_TRANSITIONS=184} [2024-06-27 21:09:50,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 21:09:50,577 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 184 transitions, 2055 flow [2024-06-27 21:09:50,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:50,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:50,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:50,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:09:50,577 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:50,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:50,578 INFO L85 PathProgramCache]: Analyzing trace with hash 701553448, now seen corresponding path program 4 times [2024-06-27 21:09:50,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:50,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944243893] [2024-06-27 21:09:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:50,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:53,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:53,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944243893] [2024-06-27 21:09:53,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944243893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:53,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:53,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:53,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395008768] [2024-06-27 21:09:53,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:53,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:53,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:53,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:53,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:53,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:09:53,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 184 transitions, 2055 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:53,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:53,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:09:53,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:54,987 INFO L124 PetriNetUnfolderBase]: 2114/3548 cut-off events. [2024-06-27 21:09:54,988 INFO L125 PetriNetUnfolderBase]: For 123933/123950 co-relation queries the response was YES. [2024-06-27 21:09:55,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20563 conditions, 3548 events. 2114/3548 cut-off events. For 123933/123950 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21341 event pairs, 451 based on Foata normal form. 16/3557 useless extension candidates. Maximal degree in co-relation 20479. Up to 1958 conditions per place. [2024-06-27 21:09:55,023 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 146 selfloop transitions, 74 changer transitions 0/225 dead transitions. [2024-06-27 21:09:55,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 225 transitions, 2551 flow [2024-06-27 21:09:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:09:55,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 21:09:55,025 INFO L175 Difference]: Start difference. First operand has 180 places, 184 transitions, 2055 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:09:55,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 225 transitions, 2551 flow [2024-06-27 21:09:55,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 225 transitions, 2397 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:55,154 INFO L231 Difference]: Finished difference. Result has 181 places, 183 transitions, 1969 flow [2024-06-27 21:09:55,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1969, PETRI_PLACES=181, PETRI_TRANSITIONS=183} [2024-06-27 21:09:55,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-27 21:09:55,156 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 183 transitions, 1969 flow [2024-06-27 21:09:55,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:55,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:55,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:55,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:09:55,156 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:55,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:55,157 INFO L85 PathProgramCache]: Analyzing trace with hash 851097835, now seen corresponding path program 1 times [2024-06-27 21:09:55,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:55,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559838507] [2024-06-27 21:09:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:55,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:57,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:57,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559838507] [2024-06-27 21:09:57,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559838507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:57,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:57,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:09:57,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986341104] [2024-06-27 21:09:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:57,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:09:57,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:09:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:09:57,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:09:57,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 183 transitions, 1969 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:57,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:57,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:09:57,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:58,956 INFO L124 PetriNetUnfolderBase]: 2020/3425 cut-off events. [2024-06-27 21:09:58,957 INFO L125 PetriNetUnfolderBase]: For 124108/124142 co-relation queries the response was YES. [2024-06-27 21:09:58,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20322 conditions, 3425 events. 2020/3425 cut-off events. For 124108/124142 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20985 event pairs, 481 based on Foata normal form. 36/3422 useless extension candidates. Maximal degree in co-relation 20237. Up to 3047 conditions per place. [2024-06-27 21:09:58,986 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 155 selfloop transitions, 41 changer transitions 0/217 dead transitions. [2024-06-27 21:09:58,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 217 transitions, 2608 flow [2024-06-27 21:09:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:58,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:58,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:09:58,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 21:09:58,988 INFO L175 Difference]: Start difference. First operand has 181 places, 183 transitions, 1969 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:09:58,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 217 transitions, 2608 flow [2024-06-27 21:09:59,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 217 transitions, 2330 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-27 21:09:59,123 INFO L231 Difference]: Finished difference. Result has 179 places, 194 transitions, 1890 flow [2024-06-27 21:09:59,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1890, PETRI_PLACES=179, PETRI_TRANSITIONS=194} [2024-06-27 21:09:59,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-27 21:09:59,124 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 194 transitions, 1890 flow [2024-06-27 21:09:59,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:09:59,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:59,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:59,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:09:59,125 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:09:59,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:59,125 INFO L85 PathProgramCache]: Analyzing trace with hash 478794135, now seen corresponding path program 2 times [2024-06-27 21:09:59,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:59,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160186621] [2024-06-27 21:09:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:59,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:01,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:01,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160186621] [2024-06-27 21:10:01,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160186621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:01,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:01,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:01,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105423988] [2024-06-27 21:10:01,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:01,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:01,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:01,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:01,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:01,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:10:01,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 194 transitions, 1890 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:01,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:01,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:10:01,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:02,346 INFO L124 PetriNetUnfolderBase]: 2007/3408 cut-off events. [2024-06-27 21:10:02,347 INFO L125 PetriNetUnfolderBase]: For 123513/123524 co-relation queries the response was YES. [2024-06-27 21:10:02,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19502 conditions, 3408 events. 2007/3408 cut-off events. For 123513/123524 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20983 event pairs, 482 based on Foata normal form. 13/3382 useless extension candidates. Maximal degree in co-relation 19419. Up to 3039 conditions per place. [2024-06-27 21:10:02,373 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 153 selfloop transitions, 39 changer transitions 0/213 dead transitions. [2024-06-27 21:10:02,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 213 transitions, 2326 flow [2024-06-27 21:10:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 21:10:02,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 21:10:02,375 INFO L175 Difference]: Start difference. First operand has 179 places, 194 transitions, 1890 flow. Second operand 6 states and 111 transitions. [2024-06-27 21:10:02,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 213 transitions, 2326 flow [2024-06-27 21:10:02,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 213 transitions, 2266 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 21:10:02,524 INFO L231 Difference]: Finished difference. Result has 183 places, 194 transitions, 1923 flow [2024-06-27 21:10:02,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1923, PETRI_PLACES=183, PETRI_TRANSITIONS=194} [2024-06-27 21:10:02,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 21:10:02,524 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 194 transitions, 1923 flow [2024-06-27 21:10:02,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:02,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:02,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:02,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:10:02,525 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:02,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:02,525 INFO L85 PathProgramCache]: Analyzing trace with hash 479209845, now seen corresponding path program 3 times [2024-06-27 21:10:02,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:02,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223131700] [2024-06-27 21:10:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:02,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:04,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:04,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223131700] [2024-06-27 21:10:04,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223131700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:04,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:04,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:04,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372723181] [2024-06-27 21:10:04,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:04,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:04,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:04,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:04,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:10:04,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 194 transitions, 1923 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:04,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:04,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:10:04,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:05,655 INFO L124 PetriNetUnfolderBase]: 1996/3384 cut-off events. [2024-06-27 21:10:05,656 INFO L125 PetriNetUnfolderBase]: For 125163/125185 co-relation queries the response was YES. [2024-06-27 21:10:05,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19380 conditions, 3384 events. 1996/3384 cut-off events. For 125163/125185 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20734 event pairs, 486 based on Foata normal form. 22/3359 useless extension candidates. Maximal degree in co-relation 19295. Up to 3013 conditions per place. [2024-06-27 21:10:05,688 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 146 selfloop transitions, 43 changer transitions 0/210 dead transitions. [2024-06-27 21:10:05,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 210 transitions, 2367 flow [2024-06-27 21:10:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 21:10:05,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:10:05,690 INFO L175 Difference]: Start difference. First operand has 183 places, 194 transitions, 1923 flow. Second operand 6 states and 105 transitions. [2024-06-27 21:10:05,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 210 transitions, 2367 flow [2024-06-27 21:10:05,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 210 transitions, 2279 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:05,878 INFO L231 Difference]: Finished difference. Result has 183 places, 197 transitions, 1965 flow [2024-06-27 21:10:05,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1965, PETRI_PLACES=183, PETRI_TRANSITIONS=197} [2024-06-27 21:10:05,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 21:10:05,879 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 197 transitions, 1965 flow [2024-06-27 21:10:05,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:05,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:05,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:05,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:10:05,879 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:05,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:05,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2106160797, now seen corresponding path program 1 times [2024-06-27 21:10:05,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:05,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160846403] [2024-06-27 21:10:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:05,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:07,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:07,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160846403] [2024-06-27 21:10:07,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160846403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:07,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:07,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:07,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217807399] [2024-06-27 21:10:07,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:07,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:07,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:07,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:07,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:07,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:07,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 197 transitions, 1965 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:07,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:07,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:07,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:08,700 INFO L124 PetriNetUnfolderBase]: 2157/3619 cut-off events. [2024-06-27 21:10:08,700 INFO L125 PetriNetUnfolderBase]: For 123787/123789 co-relation queries the response was YES. [2024-06-27 21:10:08,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20713 conditions, 3619 events. 2157/3619 cut-off events. For 123787/123789 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22025 event pairs, 514 based on Foata normal form. 1/3618 useless extension candidates. Maximal degree in co-relation 20628. Up to 3378 conditions per place. [2024-06-27 21:10:08,731 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 198 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2024-06-27 21:10:08,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 224 transitions, 2639 flow [2024-06-27 21:10:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:10:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:10:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:10:08,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:10:08,733 INFO L175 Difference]: Start difference. First operand has 183 places, 197 transitions, 1965 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:10:08,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 224 transitions, 2639 flow [2024-06-27 21:10:08,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 224 transitions, 2531 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:08,874 INFO L231 Difference]: Finished difference. Result has 186 places, 203 transitions, 1999 flow [2024-06-27 21:10:08,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1999, PETRI_PLACES=186, PETRI_TRANSITIONS=203} [2024-06-27 21:10:08,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-27 21:10:08,874 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 203 transitions, 1999 flow [2024-06-27 21:10:08,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:08,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:08,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:08,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:10:08,875 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:08,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:08,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2106280953, now seen corresponding path program 1 times [2024-06-27 21:10:08,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:08,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689658288] [2024-06-27 21:10:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:10,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689658288] [2024-06-27 21:10:10,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689658288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:10,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:10,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:10,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780876218] [2024-06-27 21:10:10,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:10,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:10,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:10,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 203 transitions, 1999 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:10,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:10,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:10,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:11,916 INFO L124 PetriNetUnfolderBase]: 2172/3640 cut-off events. [2024-06-27 21:10:11,916 INFO L125 PetriNetUnfolderBase]: For 130420/130422 co-relation queries the response was YES. [2024-06-27 21:10:11,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21090 conditions, 3640 events. 2172/3640 cut-off events. For 130420/130422 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22086 event pairs, 510 based on Foata normal form. 2/3640 useless extension candidates. Maximal degree in co-relation 21004. Up to 3391 conditions per place. [2024-06-27 21:10:11,947 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 23 changer transitions 0/232 dead transitions. [2024-06-27 21:10:11,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 2701 flow [2024-06-27 21:10:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:10:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:10:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:10:11,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:10:11,949 INFO L175 Difference]: Start difference. First operand has 186 places, 203 transitions, 1999 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:10:11,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 2701 flow [2024-06-27 21:10:12,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 232 transitions, 2639 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 21:10:12,111 INFO L231 Difference]: Finished difference. Result has 191 places, 212 transitions, 2105 flow [2024-06-27 21:10:12,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2105, PETRI_PLACES=191, PETRI_TRANSITIONS=212} [2024-06-27 21:10:12,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-27 21:10:12,112 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 212 transitions, 2105 flow [2024-06-27 21:10:12,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:12,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:12,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:12,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:10:12,112 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:12,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:12,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2106280767, now seen corresponding path program 2 times [2024-06-27 21:10:12,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:12,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228618266] [2024-06-27 21:10:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:12,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:13,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:13,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228618266] [2024-06-27 21:10:13,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228618266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:13,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:13,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:13,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292955086] [2024-06-27 21:10:13,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:13,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:13,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:13,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:13,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:13,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 212 transitions, 2105 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:13,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:13,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:13,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:15,038 INFO L124 PetriNetUnfolderBase]: 2177/3649 cut-off events. [2024-06-27 21:10:15,039 INFO L125 PetriNetUnfolderBase]: For 135414/135416 co-relation queries the response was YES. [2024-06-27 21:10:15,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21469 conditions, 3649 events. 2177/3649 cut-off events. For 135414/135416 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22130 event pairs, 515 based on Foata normal form. 1/3648 useless extension candidates. Maximal degree in co-relation 21380. Up to 3420 conditions per place. [2024-06-27 21:10:15,072 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 207 selfloop transitions, 19 changer transitions 0/231 dead transitions. [2024-06-27 21:10:15,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 231 transitions, 2645 flow [2024-06-27 21:10:15,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:10:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:10:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 21:10:15,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 21:10:15,074 INFO L175 Difference]: Start difference. First operand has 191 places, 212 transitions, 2105 flow. Second operand 7 states and 113 transitions. [2024-06-27 21:10:15,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 231 transitions, 2645 flow [2024-06-27 21:10:15,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 231 transitions, 2595 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-27 21:10:15,213 INFO L231 Difference]: Finished difference. Result has 196 places, 215 transitions, 2149 flow [2024-06-27 21:10:15,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2149, PETRI_PLACES=196, PETRI_TRANSITIONS=215} [2024-06-27 21:10:15,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-27 21:10:15,214 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 215 transitions, 2149 flow [2024-06-27 21:10:15,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:15,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:15,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:15,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:10:15,219 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:15,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:15,219 INFO L85 PathProgramCache]: Analyzing trace with hash 479215797, now seen corresponding path program 2 times [2024-06-27 21:10:15,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:15,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224551023] [2024-06-27 21:10:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:15,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:17,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:17,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224551023] [2024-06-27 21:10:17,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224551023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:17,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:17,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:17,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411626312] [2024-06-27 21:10:17,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:17,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:17,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:17,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:17,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:17,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:17,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 215 transitions, 2149 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:17,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:17,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:17,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:18,229 INFO L124 PetriNetUnfolderBase]: 2187/3664 cut-off events. [2024-06-27 21:10:18,229 INFO L125 PetriNetUnfolderBase]: For 142013/142017 co-relation queries the response was YES. [2024-06-27 21:10:18,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21669 conditions, 3664 events. 2187/3664 cut-off events. For 142013/142017 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22233 event pairs, 516 based on Foata normal form. 4/3666 useless extension candidates. Maximal degree in co-relation 21578. Up to 3408 conditions per place. [2024-06-27 21:10:18,259 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 202 selfloop transitions, 25 changer transitions 0/232 dead transitions. [2024-06-27 21:10:18,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 232 transitions, 2775 flow [2024-06-27 21:10:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:10:18,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 21:10:18,262 INFO L175 Difference]: Start difference. First operand has 196 places, 215 transitions, 2149 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:10:18,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 232 transitions, 2775 flow [2024-06-27 21:10:18,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 232 transitions, 2701 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:18,450 INFO L231 Difference]: Finished difference. Result has 196 places, 218 transitions, 2171 flow [2024-06-27 21:10:18,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2171, PETRI_PLACES=196, PETRI_TRANSITIONS=218} [2024-06-27 21:10:18,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-27 21:10:18,450 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 218 transitions, 2171 flow [2024-06-27 21:10:18,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:18,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:18,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:18,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:10:18,451 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:18,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 478978461, now seen corresponding path program 3 times [2024-06-27 21:10:18,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:18,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463017393] [2024-06-27 21:10:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:18,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:20,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:20,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463017393] [2024-06-27 21:10:20,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463017393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:20,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:20,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:20,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342163371] [2024-06-27 21:10:20,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:20,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:20,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:20,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:20,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:20,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:20,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 218 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:20,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:20,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:20,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:21,270 INFO L124 PetriNetUnfolderBase]: 2184/3659 cut-off events. [2024-06-27 21:10:21,271 INFO L125 PetriNetUnfolderBase]: For 144663/144665 co-relation queries the response was YES. [2024-06-27 21:10:21,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21699 conditions, 3659 events. 2184/3659 cut-off events. For 144663/144665 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22225 event pairs, 515 based on Foata normal form. 1/3658 useless extension candidates. Maximal degree in co-relation 21608. Up to 3416 conditions per place. [2024-06-27 21:10:21,301 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 24 changer transitions 0/237 dead transitions. [2024-06-27 21:10:21,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 237 transitions, 2689 flow [2024-06-27 21:10:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:10:21,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:10:21,303 INFO L175 Difference]: Start difference. First operand has 196 places, 218 transitions, 2171 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:10:21,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 237 transitions, 2689 flow [2024-06-27 21:10:21,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 237 transitions, 2597 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 21:10:21,503 INFO L231 Difference]: Finished difference. Result has 199 places, 218 transitions, 2141 flow [2024-06-27 21:10:21,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2141, PETRI_PLACES=199, PETRI_TRANSITIONS=218} [2024-06-27 21:10:21,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-27 21:10:21,504 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 218 transitions, 2141 flow [2024-06-27 21:10:21,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:21,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:21,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:21,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:10:21,504 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:21,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:21,505 INFO L85 PathProgramCache]: Analyzing trace with hash 497746977, now seen corresponding path program 3 times [2024-06-27 21:10:21,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:21,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048687733] [2024-06-27 21:10:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:21,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:23,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:23,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048687733] [2024-06-27 21:10:23,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048687733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:23,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:23,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:10:23,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895184339] [2024-06-27 21:10:23,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:23,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:10:23,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:23,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:10:23,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:10:23,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:23,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 218 transitions, 2141 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:23,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:23,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:23,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:24,523 INFO L124 PetriNetUnfolderBase]: 2178/3651 cut-off events. [2024-06-27 21:10:24,524 INFO L125 PetriNetUnfolderBase]: For 148387/148389 co-relation queries the response was YES. [2024-06-27 21:10:24,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21598 conditions, 3651 events. 2178/3651 cut-off events. For 148387/148389 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22092 event pairs, 510 based on Foata normal form. 2/3651 useless extension candidates. Maximal degree in co-relation 21506. Up to 3399 conditions per place. [2024-06-27 21:10:24,553 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 205 selfloop transitions, 26 changer transitions 0/236 dead transitions. [2024-06-27 21:10:24,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 236 transitions, 2651 flow [2024-06-27 21:10:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:10:24,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:10:24,554 INFO L175 Difference]: Start difference. First operand has 199 places, 218 transitions, 2141 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:10:24,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 236 transitions, 2651 flow [2024-06-27 21:10:24,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 236 transitions, 2579 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:24,744 INFO L231 Difference]: Finished difference. Result has 200 places, 218 transitions, 2131 flow [2024-06-27 21:10:24,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2131, PETRI_PLACES=200, PETRI_TRANSITIONS=218} [2024-06-27 21:10:24,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-27 21:10:24,744 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 218 transitions, 2131 flow [2024-06-27 21:10:24,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:24,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:24,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:24,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:10:24,745 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:24,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:24,745 INFO L85 PathProgramCache]: Analyzing trace with hash 479224725, now seen corresponding path program 1 times [2024-06-27 21:10:24,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:24,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867006360] [2024-06-27 21:10:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:24,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:27,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:27,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867006360] [2024-06-27 21:10:27,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867006360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:27,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:27,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:27,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830079910] [2024-06-27 21:10:27,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:27,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:27,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:27,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:27,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:27,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:10:27,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 218 transitions, 2131 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:27,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:27,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:10:27,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:28,507 INFO L124 PetriNetUnfolderBase]: 2018/3432 cut-off events. [2024-06-27 21:10:28,508 INFO L125 PetriNetUnfolderBase]: For 144692/144703 co-relation queries the response was YES. [2024-06-27 21:10:28,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20555 conditions, 3432 events. 2018/3432 cut-off events. For 144692/144703 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21099 event pairs, 477 based on Foata normal form. 11/3407 useless extension candidates. Maximal degree in co-relation 20462. Up to 3128 conditions per place. [2024-06-27 21:10:28,543 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 200 selfloop transitions, 12 changer transitions 0/233 dead transitions. [2024-06-27 21:10:28,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 233 transitions, 2619 flow [2024-06-27 21:10:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:10:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:10:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 21:10:28,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:10:28,544 INFO L175 Difference]: Start difference. First operand has 200 places, 218 transitions, 2131 flow. Second operand 6 states and 102 transitions. [2024-06-27 21:10:28,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 233 transitions, 2619 flow [2024-06-27 21:10:28,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 233 transitions, 2557 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:28,763 INFO L231 Difference]: Finished difference. Result has 200 places, 220 transitions, 2132 flow [2024-06-27 21:10:28,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2132, PETRI_PLACES=200, PETRI_TRANSITIONS=220} [2024-06-27 21:10:28,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-27 21:10:28,763 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 220 transitions, 2132 flow [2024-06-27 21:10:28,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:28,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:28,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:28,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:10:28,764 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:28,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 866476668, now seen corresponding path program 1 times [2024-06-27 21:10:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:28,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170623846] [2024-06-27 21:10:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:28,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:30,963 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 21:10:30,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:30,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170623846] [2024-06-27 21:10:30,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170623846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:30,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:30,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:30,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870434626] [2024-06-27 21:10:30,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:30,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:30,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:30,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:30,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:30,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 220 transitions, 2132 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:30,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:30,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:30,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:32,512 INFO L124 PetriNetUnfolderBase]: 2183/3658 cut-off events. [2024-06-27 21:10:32,512 INFO L125 PetriNetUnfolderBase]: For 145950/145952 co-relation queries the response was YES. [2024-06-27 21:10:32,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21575 conditions, 3658 events. 2183/3658 cut-off events. For 145950/145952 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22116 event pairs, 508 based on Foata normal form. 2/3658 useless extension candidates. Maximal degree in co-relation 21482. Up to 3357 conditions per place. [2024-06-27 21:10:32,540 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 207 selfloop transitions, 40 changer transitions 0/252 dead transitions. [2024-06-27 21:10:32,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 252 transitions, 2874 flow [2024-06-27 21:10:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:10:32,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:10:32,542 INFO L175 Difference]: Start difference. First operand has 200 places, 220 transitions, 2132 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:10:32,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 252 transitions, 2874 flow [2024-06-27 21:10:32,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 252 transitions, 2827 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:32,703 INFO L231 Difference]: Finished difference. Result has 204 places, 226 transitions, 2257 flow [2024-06-27 21:10:32,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2257, PETRI_PLACES=204, PETRI_TRANSITIONS=226} [2024-06-27 21:10:32,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 21:10:32,704 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 226 transitions, 2257 flow [2024-06-27 21:10:32,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:32,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:32,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:32,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:10:32,705 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:32,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:32,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1692028428, now seen corresponding path program 2 times [2024-06-27 21:10:32,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:32,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904550385] [2024-06-27 21:10:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:32,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:34,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:34,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904550385] [2024-06-27 21:10:34,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904550385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:34,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:34,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120863369] [2024-06-27 21:10:34,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:34,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:34,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:34,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:34,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:34,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:34,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 226 transitions, 2257 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:34,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:34,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:34,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:35,882 INFO L124 PetriNetUnfolderBase]: 2209/3698 cut-off events. [2024-06-27 21:10:35,883 INFO L125 PetriNetUnfolderBase]: For 155596/155598 co-relation queries the response was YES. [2024-06-27 21:10:35,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22374 conditions, 3698 events. 2209/3698 cut-off events. For 155596/155598 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22386 event pairs, 508 based on Foata normal form. 2/3698 useless extension candidates. Maximal degree in co-relation 22280. Up to 3422 conditions per place. [2024-06-27 21:10:35,914 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 34 changer transitions 0/255 dead transitions. [2024-06-27 21:10:35,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 255 transitions, 3009 flow [2024-06-27 21:10:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:10:35,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 21:10:35,916 INFO L175 Difference]: Start difference. First operand has 204 places, 226 transitions, 2257 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:10:35,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 255 transitions, 3009 flow [2024-06-27 21:10:36,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 255 transitions, 2925 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:36,141 INFO L231 Difference]: Finished difference. Result has 208 places, 232 transitions, 2345 flow [2024-06-27 21:10:36,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2345, PETRI_PLACES=208, PETRI_TRANSITIONS=232} [2024-06-27 21:10:36,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 21:10:36,142 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 232 transitions, 2345 flow [2024-06-27 21:10:36,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:36,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:36,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:36,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:10:36,147 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:36,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:36,148 INFO L85 PathProgramCache]: Analyzing trace with hash 870201318, now seen corresponding path program 3 times [2024-06-27 21:10:36,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:36,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819874718] [2024-06-27 21:10:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:36,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:38,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:38,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819874718] [2024-06-27 21:10:38,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819874718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:38,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:38,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:38,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872705442] [2024-06-27 21:10:38,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:38,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:38,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:38,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:38,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:38,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 232 transitions, 2345 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:38,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:38,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:38,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:39,923 INFO L124 PetriNetUnfolderBase]: 2203/3690 cut-off events. [2024-06-27 21:10:39,924 INFO L125 PetriNetUnfolderBase]: For 158246/158248 co-relation queries the response was YES. [2024-06-27 21:10:39,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22358 conditions, 3690 events. 2203/3690 cut-off events. For 158246/158248 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22335 event pairs, 508 based on Foata normal form. 2/3690 useless extension candidates. Maximal degree in co-relation 22262. Up to 3417 conditions per place. [2024-06-27 21:10:39,955 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 35 changer transitions 0/256 dead transitions. [2024-06-27 21:10:39,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 256 transitions, 2907 flow [2024-06-27 21:10:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:10:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:10:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 21:10:39,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-27 21:10:39,957 INFO L175 Difference]: Start difference. First operand has 208 places, 232 transitions, 2345 flow. Second operand 10 states and 156 transitions. [2024-06-27 21:10:39,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 256 transitions, 2907 flow [2024-06-27 21:10:40,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 256 transitions, 2825 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:40,231 INFO L231 Difference]: Finished difference. Result has 214 places, 232 transitions, 2339 flow [2024-06-27 21:10:40,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2339, PETRI_PLACES=214, PETRI_TRANSITIONS=232} [2024-06-27 21:10:40,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 21:10:40,232 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 232 transitions, 2339 flow [2024-06-27 21:10:40,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:40,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:40,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:40,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:10:40,233 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:40,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:40,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1963431804, now seen corresponding path program 4 times [2024-06-27 21:10:40,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:40,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736173024] [2024-06-27 21:10:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:40,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:42,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:42,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736173024] [2024-06-27 21:10:42,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736173024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:42,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:42,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:42,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217399869] [2024-06-27 21:10:42,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:42,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:42,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:42,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:42,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:42,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:42,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 232 transitions, 2339 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:42,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:42,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:42,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:43,663 INFO L124 PetriNetUnfolderBase]: 2213/3708 cut-off events. [2024-06-27 21:10:43,663 INFO L125 PetriNetUnfolderBase]: For 163549/163551 co-relation queries the response was YES. [2024-06-27 21:10:43,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22578 conditions, 3708 events. 2213/3708 cut-off events. For 163549/163551 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22499 event pairs, 507 based on Foata normal form. 2/3708 useless extension candidates. Maximal degree in co-relation 22480. Up to 3396 conditions per place. [2024-06-27 21:10:43,693 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 210 selfloop transitions, 45 changer transitions 0/260 dead transitions. [2024-06-27 21:10:43,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 260 transitions, 3067 flow [2024-06-27 21:10:43,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:10:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:10:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:10:43,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:10:43,695 INFO L175 Difference]: Start difference. First operand has 214 places, 232 transitions, 2339 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:10:43,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 260 transitions, 3067 flow [2024-06-27 21:10:43,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 260 transitions, 2989 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 21:10:43,935 INFO L231 Difference]: Finished difference. Result has 212 places, 235 transitions, 2407 flow [2024-06-27 21:10:43,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2407, PETRI_PLACES=212, PETRI_TRANSITIONS=235} [2024-06-27 21:10:43,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-27 21:10:43,936 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 235 transitions, 2407 flow [2024-06-27 21:10:43,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:43,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:43,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:43,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:10:43,937 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:43,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:43,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1963437384, now seen corresponding path program 5 times [2024-06-27 21:10:43,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:43,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528487563] [2024-06-27 21:10:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:43,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:46,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:46,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528487563] [2024-06-27 21:10:46,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528487563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:46,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:46,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:46,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557861655] [2024-06-27 21:10:46,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:46,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:46,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:46,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:46,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:46,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:46,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 235 transitions, 2407 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:46,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:46,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:46,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:47,496 INFO L124 PetriNetUnfolderBase]: 2223/3726 cut-off events. [2024-06-27 21:10:47,496 INFO L125 PetriNetUnfolderBase]: For 169453/169455 co-relation queries the response was YES. [2024-06-27 21:10:47,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22848 conditions, 3726 events. 2223/3726 cut-off events. For 169453/169455 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22625 event pairs, 507 based on Foata normal form. 2/3726 useless extension candidates. Maximal degree in co-relation 22749. Up to 3406 conditions per place. [2024-06-27 21:10:47,532 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 50 changer transitions 0/267 dead transitions. [2024-06-27 21:10:47,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 267 transitions, 3165 flow [2024-06-27 21:10:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:10:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:10:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:10:47,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 21:10:47,533 INFO L175 Difference]: Start difference. First operand has 212 places, 235 transitions, 2407 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:10:47,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 267 transitions, 3165 flow [2024-06-27 21:10:47,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 267 transitions, 3037 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:47,827 INFO L231 Difference]: Finished difference. Result has 215 places, 238 transitions, 2443 flow [2024-06-27 21:10:47,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2443, PETRI_PLACES=215, PETRI_TRANSITIONS=238} [2024-06-27 21:10:47,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-27 21:10:47,827 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 238 transitions, 2443 flow [2024-06-27 21:10:47,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:47,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:47,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:47,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:10:47,828 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:47,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1970789034, now seen corresponding path program 6 times [2024-06-27 21:10:47,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:47,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837205805] [2024-06-27 21:10:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:47,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:49,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:49,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837205805] [2024-06-27 21:10:49,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837205805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:49,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:49,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:49,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859714535] [2024-06-27 21:10:49,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:49,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:49,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:49,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:49,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:49,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:49,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 2443 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:49,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:49,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:49,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:51,309 INFO L124 PetriNetUnfolderBase]: 2217/3719 cut-off events. [2024-06-27 21:10:51,310 INFO L125 PetriNetUnfolderBase]: For 166608/166612 co-relation queries the response was YES. [2024-06-27 21:10:51,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22650 conditions, 3719 events. 2217/3719 cut-off events. For 166608/166612 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22601 event pairs, 512 based on Foata normal form. 4/3721 useless extension candidates. Maximal degree in co-relation 22551. Up to 3401 conditions per place. [2024-06-27 21:10:51,344 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 206 selfloop transitions, 49 changer transitions 0/260 dead transitions. [2024-06-27 21:10:51,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 260 transitions, 3009 flow [2024-06-27 21:10:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:10:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:10:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 21:10:51,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-27 21:10:51,356 INFO L175 Difference]: Start difference. First operand has 215 places, 238 transitions, 2443 flow. Second operand 9 states and 143 transitions. [2024-06-27 21:10:51,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 260 transitions, 3009 flow [2024-06-27 21:10:51,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 260 transitions, 2859 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 21:10:51,584 INFO L231 Difference]: Finished difference. Result has 216 places, 238 transitions, 2397 flow [2024-06-27 21:10:51,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2397, PETRI_PLACES=216, PETRI_TRANSITIONS=238} [2024-06-27 21:10:51,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 21:10:51,585 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 238 transitions, 2397 flow [2024-06-27 21:10:51,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:51,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:51,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:51,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:10:51,585 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:51,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:51,586 INFO L85 PathProgramCache]: Analyzing trace with hash -747902516, now seen corresponding path program 1 times [2024-06-27 21:10:51,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:51,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577182723] [2024-06-27 21:10:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:51,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:54,586 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 21:10:54,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:54,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577182723] [2024-06-27 21:10:54,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577182723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:54,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:54,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:54,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542077841] [2024-06-27 21:10:54,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:54,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:54,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:54,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:54,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:54,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:54,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 238 transitions, 2397 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:54,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:54,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:54,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:56,222 INFO L124 PetriNetUnfolderBase]: 2230/3740 cut-off events. [2024-06-27 21:10:56,222 INFO L125 PetriNetUnfolderBase]: For 166367/166373 co-relation queries the response was YES. [2024-06-27 21:10:56,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22772 conditions, 3740 events. 2230/3740 cut-off events. For 166367/166373 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22715 event pairs, 519 based on Foata normal form. 7/3744 useless extension candidates. Maximal degree in co-relation 22673. Up to 3345 conditions per place. [2024-06-27 21:10:56,257 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 217 selfloop transitions, 57 changer transitions 0/279 dead transitions. [2024-06-27 21:10:56,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 279 transitions, 3411 flow [2024-06-27 21:10:56,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:10:56,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:10:56,259 INFO L175 Difference]: Start difference. First operand has 216 places, 238 transitions, 2397 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:10:56,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 279 transitions, 3411 flow [2024-06-27 21:10:56,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 279 transitions, 3283 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 21:10:56,514 INFO L231 Difference]: Finished difference. Result has 216 places, 247 transitions, 2551 flow [2024-06-27 21:10:56,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2551, PETRI_PLACES=216, PETRI_TRANSITIONS=247} [2024-06-27 21:10:56,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 21:10:56,515 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 247 transitions, 2551 flow [2024-06-27 21:10:56,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:56,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:56,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:56,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:10:56,516 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:10:56,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:56,516 INFO L85 PathProgramCache]: Analyzing trace with hash -747782546, now seen corresponding path program 2 times [2024-06-27 21:10:56,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:56,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784837573] [2024-06-27 21:10:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:56,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:59,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:59,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784837573] [2024-06-27 21:10:59,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784837573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:59,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:59,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:10:59,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352983514] [2024-06-27 21:10:59,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:59,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:10:59,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:10:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:10:59,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:10:59,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 247 transitions, 2551 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:10:59,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:59,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:10:59,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:01,115 INFO L124 PetriNetUnfolderBase]: 2240/3757 cut-off events. [2024-06-27 21:11:01,115 INFO L125 PetriNetUnfolderBase]: For 173799/173807 co-relation queries the response was YES. [2024-06-27 21:11:01,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23285 conditions, 3757 events. 2240/3757 cut-off events. For 173799/173807 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22893 event pairs, 511 based on Foata normal form. 9/3764 useless extension candidates. Maximal degree in co-relation 23185. Up to 3429 conditions per place. [2024-06-27 21:11:01,152 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 42 changer transitions 0/279 dead transitions. [2024-06-27 21:11:01,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 279 transitions, 3264 flow [2024-06-27 21:11:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:11:01,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:11:01,154 INFO L175 Difference]: Start difference. First operand has 216 places, 247 transitions, 2551 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:11:01,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 279 transitions, 3264 flow [2024-06-27 21:11:01,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 279 transitions, 3149 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 21:11:01,425 INFO L231 Difference]: Finished difference. Result has 221 places, 253 transitions, 2619 flow [2024-06-27 21:11:01,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2619, PETRI_PLACES=221, PETRI_TRANSITIONS=253} [2024-06-27 21:11:01,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-27 21:11:01,426 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 253 transitions, 2619 flow [2024-06-27 21:11:01,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:01,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:01,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:01,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:11:01,426 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:01,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:01,427 INFO L85 PathProgramCache]: Analyzing trace with hash -255365996, now seen corresponding path program 1 times [2024-06-27 21:11:01,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:01,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663518032] [2024-06-27 21:11:01,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:01,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:04,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:04,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663518032] [2024-06-27 21:11:04,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663518032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:04,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:04,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:04,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733331637] [2024-06-27 21:11:04,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:04,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:04,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:04,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:04,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:04,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:04,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 253 transitions, 2619 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:04,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:04,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:04,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:05,728 INFO L124 PetriNetUnfolderBase]: 2282/3815 cut-off events. [2024-06-27 21:11:05,729 INFO L125 PetriNetUnfolderBase]: For 188081/188089 co-relation queries the response was YES. [2024-06-27 21:11:05,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24053 conditions, 3815 events. 2282/3815 cut-off events. For 188081/188089 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23193 event pairs, 513 based on Foata normal form. 10/3823 useless extension candidates. Maximal degree in co-relation 23951. Up to 3444 conditions per place. [2024-06-27 21:11:05,765 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 52 changer transitions 0/299 dead transitions. [2024-06-27 21:11:05,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 299 transitions, 3681 flow [2024-06-27 21:11:05,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:11:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:11:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 21:11:05,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-27 21:11:05,767 INFO L175 Difference]: Start difference. First operand has 221 places, 253 transitions, 2619 flow. Second operand 10 states and 166 transitions. [2024-06-27 21:11:05,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 299 transitions, 3681 flow [2024-06-27 21:11:06,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 299 transitions, 3567 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:11:06,097 INFO L231 Difference]: Finished difference. Result has 227 places, 266 transitions, 2798 flow [2024-06-27 21:11:06,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2798, PETRI_PLACES=227, PETRI_TRANSITIONS=266} [2024-06-27 21:11:06,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-27 21:11:06,099 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 266 transitions, 2798 flow [2024-06-27 21:11:06,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:06,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:06,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:06,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:11:06,099 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:06,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:06,100 INFO L85 PathProgramCache]: Analyzing trace with hash -570413690, now seen corresponding path program 2 times [2024-06-27 21:11:06,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:06,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458776351] [2024-06-27 21:11:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:06,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:09,001 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 21:11:09,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:09,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458776351] [2024-06-27 21:11:09,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458776351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:09,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:09,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:09,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857414693] [2024-06-27 21:11:09,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:09,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:09,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:09,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:09,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 266 transitions, 2798 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:09,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:09,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:09,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:10,290 INFO L124 PetriNetUnfolderBase]: 2334/3889 cut-off events. [2024-06-27 21:11:10,290 INFO L125 PetriNetUnfolderBase]: For 202537/202545 co-relation queries the response was YES. [2024-06-27 21:11:10,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25194 conditions, 3889 events. 2334/3889 cut-off events. For 202537/202545 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23584 event pairs, 517 based on Foata normal form. 10/3897 useless extension candidates. Maximal degree in co-relation 25090. Up to 3492 conditions per place. [2024-06-27 21:11:10,325 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 64 changer transitions 0/310 dead transitions. [2024-06-27 21:11:10,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 310 transitions, 3952 flow [2024-06-27 21:11:10,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:10,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:11:10,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 21:11:10,327 INFO L175 Difference]: Start difference. First operand has 227 places, 266 transitions, 2798 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:11:10,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 310 transitions, 3952 flow [2024-06-27 21:11:10,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 310 transitions, 3758 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-27 21:11:10,695 INFO L231 Difference]: Finished difference. Result has 231 places, 282 transitions, 2976 flow [2024-06-27 21:11:10,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2976, PETRI_PLACES=231, PETRI_TRANSITIONS=282} [2024-06-27 21:11:10,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-27 21:11:10,696 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 282 transitions, 2976 flow [2024-06-27 21:11:10,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:10,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:10,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:10,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:11:10,696 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:10,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:10,697 INFO L85 PathProgramCache]: Analyzing trace with hash -250724366, now seen corresponding path program 3 times [2024-06-27 21:11:10,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:10,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558974344] [2024-06-27 21:11:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:10,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:13,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558974344] [2024-06-27 21:11:13,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558974344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:13,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:13,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873605488] [2024-06-27 21:11:13,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:13,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:13,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:13,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:13,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 282 transitions, 2976 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:13,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:13,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:13,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:15,131 INFO L124 PetriNetUnfolderBase]: 2328/3881 cut-off events. [2024-06-27 21:11:15,131 INFO L125 PetriNetUnfolderBase]: For 204467/204475 co-relation queries the response was YES. [2024-06-27 21:11:15,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25015 conditions, 3881 events. 2328/3881 cut-off events. For 204467/204475 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23546 event pairs, 516 based on Foata normal form. 10/3889 useless extension candidates. Maximal degree in co-relation 24909. Up to 3487 conditions per place. [2024-06-27 21:11:15,164 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 66 changer transitions 0/313 dead transitions. [2024-06-27 21:11:15,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 313 transitions, 3908 flow [2024-06-27 21:11:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:11:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:11:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-27 21:11:15,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:11:15,166 INFO L175 Difference]: Start difference. First operand has 231 places, 282 transitions, 2976 flow. Second operand 11 states and 176 transitions. [2024-06-27 21:11:15,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 313 transitions, 3908 flow [2024-06-27 21:11:15,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 313 transitions, 3822 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:11:15,430 INFO L231 Difference]: Finished difference. Result has 239 places, 282 transitions, 3028 flow [2024-06-27 21:11:15,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3028, PETRI_PLACES=239, PETRI_TRANSITIONS=282} [2024-06-27 21:11:15,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 21:11:15,431 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 282 transitions, 3028 flow [2024-06-27 21:11:15,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:15,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:15,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:15,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:11:15,431 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:15,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:15,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1690783200, now seen corresponding path program 3 times [2024-06-27 21:11:15,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:15,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361448822] [2024-06-27 21:11:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:15,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:18,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:18,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361448822] [2024-06-27 21:11:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361448822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:18,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:18,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:18,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612406628] [2024-06-27 21:11:18,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:18,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:18,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:18,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:18,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:18,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:18,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 282 transitions, 3028 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:18,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:18,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:18,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:19,996 INFO L124 PetriNetUnfolderBase]: 2341/3905 cut-off events. [2024-06-27 21:11:19,996 INFO L125 PetriNetUnfolderBase]: For 211354/211362 co-relation queries the response was YES. [2024-06-27 21:11:20,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25361 conditions, 3905 events. 2341/3905 cut-off events. For 211354/211362 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23756 event pairs, 520 based on Foata normal form. 9/3912 useless extension candidates. Maximal degree in co-relation 25254. Up to 3560 conditions per place. [2024-06-27 21:11:20,039 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 253 selfloop transitions, 54 changer transitions 0/312 dead transitions. [2024-06-27 21:11:20,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 312 transitions, 3932 flow [2024-06-27 21:11:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 21:11:20,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-27 21:11:20,042 INFO L175 Difference]: Start difference. First operand has 239 places, 282 transitions, 3028 flow. Second operand 9 states and 145 transitions. [2024-06-27 21:11:20,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 312 transitions, 3932 flow [2024-06-27 21:11:20,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 312 transitions, 3774 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 21:11:20,350 INFO L231 Difference]: Finished difference. Result has 241 places, 288 transitions, 3106 flow [2024-06-27 21:11:20,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2870, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3106, PETRI_PLACES=241, PETRI_TRANSITIONS=288} [2024-06-27 21:11:20,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-27 21:11:20,351 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 288 transitions, 3106 flow [2024-06-27 21:11:20,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:20,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:20,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:20,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:11:20,351 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:20,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1690536936, now seen corresponding path program 1 times [2024-06-27 21:11:20,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:20,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165655714] [2024-06-27 21:11:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:20,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:23,892 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 21:11:23,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:23,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165655714] [2024-06-27 21:11:23,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165655714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:23,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:23,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:23,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552695769] [2024-06-27 21:11:23,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:23,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:23,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:23,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:23,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:11:23,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 288 transitions, 3106 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:23,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:23,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:11:23,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:25,156 INFO L124 PetriNetUnfolderBase]: 2232/3751 cut-off events. [2024-06-27 21:11:25,157 INFO L125 PetriNetUnfolderBase]: For 236984/236995 co-relation queries the response was YES. [2024-06-27 21:11:25,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24799 conditions, 3751 events. 2232/3751 cut-off events. For 236984/236995 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23025 event pairs, 484 based on Foata normal form. 21/3732 useless extension candidates. Maximal degree in co-relation 24690. Up to 3259 conditions per place. [2024-06-27 21:11:25,197 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 234 selfloop transitions, 46 changer transitions 0/317 dead transitions. [2024-06-27 21:11:25,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 317 transitions, 3778 flow [2024-06-27 21:11:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:11:25,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 21:11:25,199 INFO L175 Difference]: Start difference. First operand has 241 places, 288 transitions, 3106 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:11:25,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 317 transitions, 3778 flow [2024-06-27 21:11:25,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 317 transitions, 3630 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:25,647 INFO L231 Difference]: Finished difference. Result has 244 places, 289 transitions, 3074 flow [2024-06-27 21:11:25,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3074, PETRI_PLACES=244, PETRI_TRANSITIONS=289} [2024-06-27 21:11:25,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-27 21:11:25,647 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 289 transitions, 3074 flow [2024-06-27 21:11:25,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:25,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:25,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:25,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:11:25,648 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:25,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1040005182, now seen corresponding path program 4 times [2024-06-27 21:11:25,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:25,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041521339] [2024-06-27 21:11:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:25,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:28,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:28,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041521339] [2024-06-27 21:11:28,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041521339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:28,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:28,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:28,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136690961] [2024-06-27 21:11:28,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:28,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:28,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:28,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:28,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:28,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 289 transitions, 3074 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:28,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:28,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:28,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:29,759 INFO L124 PetriNetUnfolderBase]: 2398/3988 cut-off events. [2024-06-27 21:11:29,759 INFO L125 PetriNetUnfolderBase]: For 228045/228064 co-relation queries the response was YES. [2024-06-27 21:11:29,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26155 conditions, 3988 events. 2398/3988 cut-off events. For 228045/228064 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24217 event pairs, 529 based on Foata normal form. 15/3999 useless extension candidates. Maximal degree in co-relation 26045. Up to 3569 conditions per place. [2024-06-27 21:11:29,794 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 84 changer transitions 0/324 dead transitions. [2024-06-27 21:11:29,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 324 transitions, 4158 flow [2024-06-27 21:11:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:11:29,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:11:29,796 INFO L175 Difference]: Start difference. First operand has 244 places, 289 transitions, 3074 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:11:29,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 324 transitions, 4158 flow [2024-06-27 21:11:30,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 324 transitions, 4064 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:11:30,190 INFO L231 Difference]: Finished difference. Result has 245 places, 295 transitions, 3270 flow [2024-06-27 21:11:30,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3270, PETRI_PLACES=245, PETRI_TRANSITIONS=295} [2024-06-27 21:11:30,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-27 21:11:30,191 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 295 transitions, 3270 flow [2024-06-27 21:11:30,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:30,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:30,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:30,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:11:30,191 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:30,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:30,192 INFO L85 PathProgramCache]: Analyzing trace with hash -582263382, now seen corresponding path program 5 times [2024-06-27 21:11:30,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:30,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884627830] [2024-06-27 21:11:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:30,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:32,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:32,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884627830] [2024-06-27 21:11:32,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884627830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:32,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:32,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:32,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007404567] [2024-06-27 21:11:32,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:32,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:32,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:32,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:32,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:32,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 295 transitions, 3270 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:32,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:32,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:32,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:34,463 INFO L124 PetriNetUnfolderBase]: 2403/3997 cut-off events. [2024-06-27 21:11:34,464 INFO L125 PetriNetUnfolderBase]: For 234663/234682 co-relation queries the response was YES. [2024-06-27 21:11:34,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26357 conditions, 3997 events. 2403/3997 cut-off events. For 234663/234682 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24337 event pairs, 527 based on Foata normal form. 15/4008 useless extension candidates. Maximal degree in co-relation 26246. Up to 3575 conditions per place. [2024-06-27 21:11:34,505 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 83 changer transitions 0/328 dead transitions. [2024-06-27 21:11:34,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 328 transitions, 4440 flow [2024-06-27 21:11:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:11:34,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 21:11:34,506 INFO L175 Difference]: Start difference. First operand has 245 places, 295 transitions, 3270 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:11:34,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 328 transitions, 4440 flow [2024-06-27 21:11:34,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 328 transitions, 4250 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 21:11:34,888 INFO L231 Difference]: Finished difference. Result has 249 places, 298 transitions, 3316 flow [2024-06-27 21:11:34,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3316, PETRI_PLACES=249, PETRI_TRANSITIONS=298} [2024-06-27 21:11:34,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-27 21:11:34,889 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 298 transitions, 3316 flow [2024-06-27 21:11:34,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:34,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:34,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:34,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:11:34,890 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:34,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:34,890 INFO L85 PathProgramCache]: Analyzing trace with hash 851751642, now seen corresponding path program 4 times [2024-06-27 21:11:34,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:34,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312944985] [2024-06-27 21:11:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:34,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:37,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:37,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312944985] [2024-06-27 21:11:37,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312944985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:37,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:37,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:37,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737470232] [2024-06-27 21:11:37,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:37,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:37,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:37,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:37,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:37,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:37,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 298 transitions, 3316 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:37,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:37,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:37,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:39,132 INFO L124 PetriNetUnfolderBase]: 2397/3989 cut-off events. [2024-06-27 21:11:39,132 INFO L125 PetriNetUnfolderBase]: For 239349/239368 co-relation queries the response was YES. [2024-06-27 21:11:39,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26251 conditions, 3989 events. 2397/3989 cut-off events. For 239349/239368 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24252 event pairs, 534 based on Foata normal form. 16/4001 useless extension candidates. Maximal degree in co-relation 26139. Up to 3640 conditions per place. [2024-06-27 21:11:39,169 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 270 selfloop transitions, 52 changer transitions 0/327 dead transitions. [2024-06-27 21:11:39,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 327 transitions, 4192 flow [2024-06-27 21:11:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:11:39,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 21:11:39,171 INFO L175 Difference]: Start difference. First operand has 249 places, 298 transitions, 3316 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:11:39,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 327 transitions, 4192 flow [2024-06-27 21:11:39,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 327 transitions, 3884 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 21:11:39,607 INFO L231 Difference]: Finished difference. Result has 252 places, 300 transitions, 3154 flow [2024-06-27 21:11:39,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3154, PETRI_PLACES=252, PETRI_TRANSITIONS=300} [2024-06-27 21:11:39,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-27 21:11:39,607 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 300 transitions, 3154 flow [2024-06-27 21:11:39,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:39,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:39,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:39,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:11:39,608 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:39,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash 851751456, now seen corresponding path program 6 times [2024-06-27 21:11:39,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:39,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661722704] [2024-06-27 21:11:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:42,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:42,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661722704] [2024-06-27 21:11:42,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661722704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:42,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:42,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:42,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404021271] [2024-06-27 21:11:42,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:42,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:42,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:42,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:42,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:42,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:42,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 300 transitions, 3154 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:42,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:42,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:42,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:44,035 INFO L124 PetriNetUnfolderBase]: 2394/3989 cut-off events. [2024-06-27 21:11:44,035 INFO L125 PetriNetUnfolderBase]: For 241001/241020 co-relation queries the response was YES. [2024-06-27 21:11:44,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26079 conditions, 3989 events. 2394/3989 cut-off events. For 241001/241020 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24326 event pairs, 536 based on Foata normal form. 15/4000 useless extension candidates. Maximal degree in co-relation 25965. Up to 3648 conditions per place. [2024-06-27 21:11:44,071 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 49 changer transitions 0/323 dead transitions. [2024-06-27 21:11:44,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 323 transitions, 3860 flow [2024-06-27 21:11:44,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:44,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:11:44,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:11:44,073 INFO L175 Difference]: Start difference. First operand has 252 places, 300 transitions, 3154 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:11:44,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 323 transitions, 3860 flow [2024-06-27 21:11:44,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 323 transitions, 3736 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:11:44,417 INFO L231 Difference]: Finished difference. Result has 255 places, 300 transitions, 3134 flow [2024-06-27 21:11:44,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3134, PETRI_PLACES=255, PETRI_TRANSITIONS=300} [2024-06-27 21:11:44,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-27 21:11:44,418 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 300 transitions, 3134 flow [2024-06-27 21:11:44,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:44,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:44,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:44,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:11:44,419 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:44,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:44,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1079860926, now seen corresponding path program 7 times [2024-06-27 21:11:44,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:44,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932356825] [2024-06-27 21:11:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:44,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:46,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:46,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932356825] [2024-06-27 21:11:46,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932356825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:46,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:46,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:46,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913293302] [2024-06-27 21:11:46,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:46,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:46,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:46,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:46,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:46,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:46,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 300 transitions, 3134 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:46,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:46,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:46,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:48,360 INFO L124 PetriNetUnfolderBase]: 2399/3992 cut-off events. [2024-06-27 21:11:48,360 INFO L125 PetriNetUnfolderBase]: For 247910/247929 co-relation queries the response was YES. [2024-06-27 21:11:48,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26198 conditions, 3992 events. 2399/3992 cut-off events. For 247910/247929 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24289 event pairs, 534 based on Foata normal form. 15/4003 useless extension candidates. Maximal degree in co-relation 26083. Up to 3570 conditions per place. [2024-06-27 21:11:48,402 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 90 changer transitions 0/327 dead transitions. [2024-06-27 21:11:48,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 327 transitions, 4024 flow [2024-06-27 21:11:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:11:48,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 21:11:48,404 INFO L175 Difference]: Start difference. First operand has 255 places, 300 transitions, 3134 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:11:48,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 327 transitions, 4024 flow [2024-06-27 21:11:48,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 327 transitions, 3922 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:11:48,750 INFO L231 Difference]: Finished difference. Result has 256 places, 303 transitions, 3262 flow [2024-06-27 21:11:48,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3262, PETRI_PLACES=256, PETRI_TRANSITIONS=303} [2024-06-27 21:11:48,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-27 21:11:48,751 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 303 transitions, 3262 flow [2024-06-27 21:11:48,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:48,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:48,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:48,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:11:48,751 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:48,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:48,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1206251646, now seen corresponding path program 8 times [2024-06-27 21:11:48,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:48,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131787666] [2024-06-27 21:11:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:48,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:51,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:51,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131787666] [2024-06-27 21:11:51,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131787666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:51,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:51,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:51,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711723709] [2024-06-27 21:11:51,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:51,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:51,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:51,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:51,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:51,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:51,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 303 transitions, 3262 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:51,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:51,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:51,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:52,591 INFO L124 PetriNetUnfolderBase]: 2417/4019 cut-off events. [2024-06-27 21:11:52,591 INFO L125 PetriNetUnfolderBase]: For 257645/257664 co-relation queries the response was YES. [2024-06-27 21:11:52,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26707 conditions, 4019 events. 2417/4019 cut-off events. For 257645/257664 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24458 event pairs, 534 based on Foata normal form. 15/4030 useless extension candidates. Maximal degree in co-relation 26591. Up to 3666 conditions per place. [2024-06-27 21:11:52,633 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 63 changer transitions 0/332 dead transitions. [2024-06-27 21:11:52,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 332 transitions, 4256 flow [2024-06-27 21:11:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:11:52,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:11:52,634 INFO L175 Difference]: Start difference. First operand has 256 places, 303 transitions, 3262 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:11:52,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 332 transitions, 4256 flow [2024-06-27 21:11:53,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 332 transitions, 4080 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:11:53,028 INFO L231 Difference]: Finished difference. Result has 260 places, 312 transitions, 3394 flow [2024-06-27 21:11:53,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3394, PETRI_PLACES=260, PETRI_TRANSITIONS=312} [2024-06-27 21:11:53,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-27 21:11:53,029 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 312 transitions, 3394 flow [2024-06-27 21:11:53,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:53,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:53,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:53,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:11:53,029 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:53,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1206430392, now seen corresponding path program 5 times [2024-06-27 21:11:53,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:53,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916276599] [2024-06-27 21:11:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:53,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:55,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:55,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916276599] [2024-06-27 21:11:55,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916276599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:55,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:55,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:55,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429390927] [2024-06-27 21:11:55,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:55,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:55,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:55,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:55,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:55,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:11:55,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 312 transitions, 3394 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:55,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:55,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:11:55,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:56,928 INFO L124 PetriNetUnfolderBase]: 2443/4059 cut-off events. [2024-06-27 21:11:56,928 INFO L125 PetriNetUnfolderBase]: For 272188/272207 co-relation queries the response was YES. [2024-06-27 21:11:56,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27153 conditions, 4059 events. 2443/4059 cut-off events. For 272188/272207 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24713 event pairs, 522 based on Foata normal form. 16/4071 useless extension candidates. Maximal degree in co-relation 27035. Up to 3586 conditions per place. [2024-06-27 21:11:56,971 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 85 changer transitions 0/349 dead transitions. [2024-06-27 21:11:56,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 349 transitions, 4594 flow [2024-06-27 21:11:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:11:56,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 21:11:56,973 INFO L175 Difference]: Start difference. First operand has 260 places, 312 transitions, 3394 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:11:56,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 349 transitions, 4594 flow [2024-06-27 21:11:57,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 349 transitions, 4480 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 21:11:57,402 INFO L231 Difference]: Finished difference. Result has 266 places, 324 transitions, 3664 flow [2024-06-27 21:11:57,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3664, PETRI_PLACES=266, PETRI_TRANSITIONS=324} [2024-06-27 21:11:57,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-27 21:11:57,403 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 324 transitions, 3664 flow [2024-06-27 21:11:57,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:57,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:57,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:11:57,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:11:57,403 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:11:57,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:57,404 INFO L85 PathProgramCache]: Analyzing trace with hash -913523136, now seen corresponding path program 6 times [2024-06-27 21:11:57,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:57,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700504598] [2024-06-27 21:11:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:57,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:00,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:00,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700504598] [2024-06-27 21:12:00,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700504598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:00,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:00,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:00,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507030231] [2024-06-27 21:12:00,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:00,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:00,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:00,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 324 transitions, 3664 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:00,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:00,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:00,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:01,646 INFO L124 PetriNetUnfolderBase]: 2437/4051 cut-off events. [2024-06-27 21:12:01,646 INFO L125 PetriNetUnfolderBase]: For 276408/276427 co-relation queries the response was YES. [2024-06-27 21:12:01,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27452 conditions, 4051 events. 2437/4051 cut-off events. For 276408/276427 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24723 event pairs, 530 based on Foata normal form. 16/4063 useless extension candidates. Maximal degree in co-relation 27332. Up to 3704 conditions per place. [2024-06-27 21:12:01,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 52 changer transitions 0/344 dead transitions. [2024-06-27 21:12:01,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 344 transitions, 4402 flow [2024-06-27 21:12:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:12:01,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 21:12:01,692 INFO L175 Difference]: Start difference. First operand has 266 places, 324 transitions, 3664 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:12:01,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 344 transitions, 4402 flow [2024-06-27 21:12:02,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 344 transitions, 4282 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-27 21:12:02,216 INFO L231 Difference]: Finished difference. Result has 271 places, 324 transitions, 3654 flow [2024-06-27 21:12:02,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3654, PETRI_PLACES=271, PETRI_TRANSITIONS=324} [2024-06-27 21:12:02,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-27 21:12:02,217 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 324 transitions, 3654 flow [2024-06-27 21:12:02,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:02,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:02,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:02,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:12:02,217 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:02,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:02,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1206014496, now seen corresponding path program 9 times [2024-06-27 21:12:02,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:02,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616401397] [2024-06-27 21:12:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:02,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:04,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:04,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616401397] [2024-06-27 21:12:04,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616401397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:04,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:04,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:04,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141961613] [2024-06-27 21:12:04,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:04,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:04,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:04,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 324 transitions, 3654 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:04,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:04,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:04,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:06,650 INFO L124 PetriNetUnfolderBase]: 2434/4047 cut-off events. [2024-06-27 21:12:06,651 INFO L125 PetriNetUnfolderBase]: For 277869/277888 co-relation queries the response was YES. [2024-06-27 21:12:06,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27261 conditions, 4047 events. 2434/4047 cut-off events. For 277869/277888 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24693 event pairs, 530 based on Foata normal form. 15/4058 useless extension candidates. Maximal degree in co-relation 27139. Up to 3691 conditions per place. [2024-06-27 21:12:06,689 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 64 changer transitions 0/345 dead transitions. [2024-06-27 21:12:06,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 345 transitions, 4396 flow [2024-06-27 21:12:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:12:06,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:12:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 21:12:06,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-27 21:12:06,690 INFO L175 Difference]: Start difference. First operand has 271 places, 324 transitions, 3654 flow. Second operand 10 states and 153 transitions. [2024-06-27 21:12:06,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 345 transitions, 4396 flow [2024-06-27 21:12:07,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 345 transitions, 4244 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:12:07,195 INFO L231 Difference]: Finished difference. Result has 274 places, 324 transitions, 3636 flow [2024-06-27 21:12:07,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3636, PETRI_PLACES=274, PETRI_TRANSITIONS=324} [2024-06-27 21:12:07,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-27 21:12:07,196 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 324 transitions, 3636 flow [2024-06-27 21:12:07,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:07,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:07,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:07,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:12:07,197 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:07,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:07,197 INFO L85 PathProgramCache]: Analyzing trace with hash 736831324, now seen corresponding path program 10 times [2024-06-27 21:12:07,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:07,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862958287] [2024-06-27 21:12:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:07,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:09,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:09,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862958287] [2024-06-27 21:12:09,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862958287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:09,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:09,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:09,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883775513] [2024-06-27 21:12:09,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:09,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:09,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:09,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:09,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:09,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 324 transitions, 3636 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:09,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:09,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:09,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:11,170 INFO L124 PetriNetUnfolderBase]: 2431/4043 cut-off events. [2024-06-27 21:12:11,170 INFO L125 PetriNetUnfolderBase]: For 282721/282740 co-relation queries the response was YES. [2024-06-27 21:12:11,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27260 conditions, 4043 events. 2431/4043 cut-off events. For 282721/282740 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24641 event pairs, 530 based on Foata normal form. 15/4054 useless extension candidates. Maximal degree in co-relation 27137. Up to 3626 conditions per place. [2024-06-27 21:12:11,209 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 87 changer transitions 0/351 dead transitions. [2024-06-27 21:12:11,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 351 transitions, 4550 flow [2024-06-27 21:12:11,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:12:11,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 21:12:11,211 INFO L175 Difference]: Start difference. First operand has 274 places, 324 transitions, 3636 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:12:11,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 351 transitions, 4550 flow [2024-06-27 21:12:11,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 351 transitions, 4370 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 21:12:11,711 INFO L231 Difference]: Finished difference. Result has 271 places, 324 transitions, 3644 flow [2024-06-27 21:12:11,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3644, PETRI_PLACES=271, PETRI_TRANSITIONS=324} [2024-06-27 21:12:11,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-27 21:12:11,711 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 324 transitions, 3644 flow [2024-06-27 21:12:11,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:11,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:11,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:11,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:12:11,712 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:11,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:11,712 INFO L85 PathProgramCache]: Analyzing trace with hash 736594174, now seen corresponding path program 11 times [2024-06-27 21:12:11,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:11,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125426878] [2024-06-27 21:12:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:11,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:14,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125426878] [2024-06-27 21:12:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125426878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:14,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:14,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:14,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355898822] [2024-06-27 21:12:14,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:14,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:14,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:14,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:14,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:14,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:14,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 324 transitions, 3644 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:14,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:14,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:14,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:16,183 INFO L124 PetriNetUnfolderBase]: 2428/4035 cut-off events. [2024-06-27 21:12:16,183 INFO L125 PetriNetUnfolderBase]: For 287663/287682 co-relation queries the response was YES. [2024-06-27 21:12:16,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27319 conditions, 4035 events. 2428/4035 cut-off events. For 287663/287682 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24587 event pairs, 530 based on Foata normal form. 15/4046 useless extension candidates. Maximal degree in co-relation 27196. Up to 3623 conditions per place. [2024-06-27 21:12:16,228 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 266 selfloop transitions, 90 changer transitions 0/361 dead transitions. [2024-06-27 21:12:16,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 361 transitions, 4608 flow [2024-06-27 21:12:16,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:12:16,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:12:16,229 INFO L175 Difference]: Start difference. First operand has 271 places, 324 transitions, 3644 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:12:16,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 361 transitions, 4608 flow [2024-06-27 21:12:16,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 361 transitions, 4342 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 21:12:16,888 INFO L231 Difference]: Finished difference. Result has 272 places, 324 transitions, 3580 flow [2024-06-27 21:12:16,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3580, PETRI_PLACES=272, PETRI_TRANSITIONS=324} [2024-06-27 21:12:16,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-27 21:12:16,888 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 324 transitions, 3580 flow [2024-06-27 21:12:16,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:16,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:16,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:16,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:12:16,889 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:16,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:16,889 INFO L85 PathProgramCache]: Analyzing trace with hash 959197300, now seen corresponding path program 7 times [2024-06-27 21:12:16,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:16,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538573122] [2024-06-27 21:12:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:19,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:19,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538573122] [2024-06-27 21:12:19,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538573122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:19,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:19,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:19,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525970883] [2024-06-27 21:12:19,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:19,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:19,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:19,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:19,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:19,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 324 transitions, 3580 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:19,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:19,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:19,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:20,859 INFO L124 PetriNetUnfolderBase]: 2438/4054 cut-off events. [2024-06-27 21:12:20,859 INFO L125 PetriNetUnfolderBase]: For 283779/283812 co-relation queries the response was YES. [2024-06-27 21:12:20,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27296 conditions, 4054 events. 2438/4054 cut-off events. For 283779/283812 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 24723 event pairs, 538 based on Foata normal form. 24/4074 useless extension candidates. Maximal degree in co-relation 27173. Up to 3579 conditions per place. [2024-06-27 21:12:20,908 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 86 changer transitions 0/346 dead transitions. [2024-06-27 21:12:20,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 346 transitions, 4650 flow [2024-06-27 21:12:20,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:12:20,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 21:12:20,909 INFO L175 Difference]: Start difference. First operand has 272 places, 324 transitions, 3580 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:12:20,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 346 transitions, 4650 flow [2024-06-27 21:12:21,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 346 transitions, 4440 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-27 21:12:21,503 INFO L231 Difference]: Finished difference. Result has 268 places, 327 transitions, 3614 flow [2024-06-27 21:12:21,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3614, PETRI_PLACES=268, PETRI_TRANSITIONS=327} [2024-06-27 21:12:21,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-27 21:12:21,504 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 327 transitions, 3614 flow [2024-06-27 21:12:21,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:21,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:21,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:21,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:12:21,504 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:21,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:21,505 INFO L85 PathProgramCache]: Analyzing trace with hash -844085940, now seen corresponding path program 8 times [2024-06-27 21:12:21,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:21,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522463210] [2024-06-27 21:12:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:21,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:23,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522463210] [2024-06-27 21:12:23,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522463210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:23,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:23,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:23,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370702438] [2024-06-27 21:12:23,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:23,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:23,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:23,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:23,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:23,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:23,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 327 transitions, 3614 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:23,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:23,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:23,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:25,298 INFO L124 PetriNetUnfolderBase]: 2464/4092 cut-off events. [2024-06-27 21:12:25,299 INFO L125 PetriNetUnfolderBase]: For 274364/274397 co-relation queries the response was YES. [2024-06-27 21:12:25,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27487 conditions, 4092 events. 2464/4092 cut-off events. For 274364/274397 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24977 event pairs, 539 based on Foata normal form. 24/4112 useless extension candidates. Maximal degree in co-relation 27366. Up to 3604 conditions per place. [2024-06-27 21:12:25,343 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 92 changer transitions 0/352 dead transitions. [2024-06-27 21:12:25,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 352 transitions, 4741 flow [2024-06-27 21:12:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:12:25,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 21:12:25,344 INFO L175 Difference]: Start difference. First operand has 268 places, 327 transitions, 3614 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:12:25,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 352 transitions, 4741 flow [2024-06-27 21:12:25,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 352 transitions, 4427 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:25,800 INFO L231 Difference]: Finished difference. Result has 270 places, 333 transitions, 3597 flow [2024-06-27 21:12:25,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3597, PETRI_PLACES=270, PETRI_TRANSITIONS=333} [2024-06-27 21:12:25,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 21:12:25,801 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 333 transitions, 3597 flow [2024-06-27 21:12:25,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:25,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:25,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:25,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:12:25,801 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:25,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:25,802 INFO L85 PathProgramCache]: Analyzing trace with hash 737010070, now seen corresponding path program 9 times [2024-06-27 21:12:25,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:25,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641097212] [2024-06-27 21:12:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:25,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:28,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:28,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641097212] [2024-06-27 21:12:28,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641097212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:28,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:28,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:28,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681474345] [2024-06-27 21:12:28,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:28,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:28,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:28,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:28,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:28,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 333 transitions, 3597 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:28,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:28,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:28,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:29,640 INFO L124 PetriNetUnfolderBase]: 2458/4081 cut-off events. [2024-06-27 21:12:29,641 INFO L125 PetriNetUnfolderBase]: For 275159/275178 co-relation queries the response was YES. [2024-06-27 21:12:29,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27060 conditions, 4081 events. 2458/4081 cut-off events. For 275159/275178 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24915 event pairs, 519 based on Foata normal form. 16/4093 useless extension candidates. Maximal degree in co-relation 26939. Up to 3599 conditions per place. [2024-06-27 21:12:29,685 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 256 selfloop transitions, 96 changer transitions 0/357 dead transitions. [2024-06-27 21:12:29,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 357 transitions, 4645 flow [2024-06-27 21:12:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:12:29,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 21:12:29,686 INFO L175 Difference]: Start difference. First operand has 270 places, 333 transitions, 3597 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:12:29,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 357 transitions, 4645 flow [2024-06-27 21:12:30,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 357 transitions, 4494 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 21:12:30,146 INFO L231 Difference]: Finished difference. Result has 274 places, 333 transitions, 3648 flow [2024-06-27 21:12:30,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3648, PETRI_PLACES=274, PETRI_TRANSITIONS=333} [2024-06-27 21:12:30,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-27 21:12:30,147 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 333 transitions, 3648 flow [2024-06-27 21:12:30,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:30,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:30,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:30,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:12:30,148 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:30,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash 736594360, now seen corresponding path program 10 times [2024-06-27 21:12:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:30,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646822831] [2024-06-27 21:12:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:30,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:32,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:32,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646822831] [2024-06-27 21:12:32,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646822831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:32,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:32,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:32,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298053242] [2024-06-27 21:12:32,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:32,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:32,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:32,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:32,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 333 transitions, 3648 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:32,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:32,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:32,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:34,284 INFO L124 PetriNetUnfolderBase]: 2452/4073 cut-off events. [2024-06-27 21:12:34,284 INFO L125 PetriNetUnfolderBase]: For 278007/278026 co-relation queries the response was YES. [2024-06-27 21:12:34,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26994 conditions, 4073 events. 2452/4073 cut-off events. For 278007/278026 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24806 event pairs, 535 based on Foata normal form. 16/4085 useless extension candidates. Maximal degree in co-relation 26872. Up to 3714 conditions per place. [2024-06-27 21:12:34,337 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 294 selfloop transitions, 57 changer transitions 0/356 dead transitions. [2024-06-27 21:12:34,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 356 transitions, 4420 flow [2024-06-27 21:12:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:12:34,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 21:12:34,339 INFO L175 Difference]: Start difference. First operand has 274 places, 333 transitions, 3648 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:12:34,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 356 transitions, 4420 flow [2024-06-27 21:12:35,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 356 transitions, 4240 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:35,033 INFO L231 Difference]: Finished difference. Result has 276 places, 333 transitions, 3596 flow [2024-06-27 21:12:35,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3596, PETRI_PLACES=276, PETRI_TRANSITIONS=333} [2024-06-27 21:12:35,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 21:12:35,034 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 333 transitions, 3596 flow [2024-06-27 21:12:35,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:35,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:35,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:35,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:12:35,034 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:35,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:35,035 INFO L85 PathProgramCache]: Analyzing trace with hash 559462654, now seen corresponding path program 12 times [2024-06-27 21:12:35,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:35,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401006405] [2024-06-27 21:12:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:35,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:37,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:37,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401006405] [2024-06-27 21:12:37,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401006405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:37,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:37,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:37,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474860458] [2024-06-27 21:12:37,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:37,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:37,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:37,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:37,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:37,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:37,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 333 transitions, 3596 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:37,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:37,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:37,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:39,332 INFO L124 PetriNetUnfolderBase]: 2449/4064 cut-off events. [2024-06-27 21:12:39,333 INFO L125 PetriNetUnfolderBase]: For 272790/272798 co-relation queries the response was YES. [2024-06-27 21:12:39,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26748 conditions, 4064 events. 2449/4064 cut-off events. For 272790/272798 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24746 event pairs, 531 based on Foata normal form. 9/4071 useless extension candidates. Maximal degree in co-relation 26626. Up to 3654 conditions per place. [2024-06-27 21:12:39,379 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 277 selfloop transitions, 90 changer transitions 0/372 dead transitions. [2024-06-27 21:12:39,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 372 transitions, 4446 flow [2024-06-27 21:12:39,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:39,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:12:39,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 21:12:39,382 INFO L175 Difference]: Start difference. First operand has 276 places, 333 transitions, 3596 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:12:39,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 372 transitions, 4446 flow [2024-06-27 21:12:39,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 372 transitions, 4294 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 21:12:39,919 INFO L231 Difference]: Finished difference. Result has 277 places, 333 transitions, 3642 flow [2024-06-27 21:12:39,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3642, PETRI_PLACES=277, PETRI_TRANSITIONS=333} [2024-06-27 21:12:39,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-27 21:12:39,920 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 333 transitions, 3642 flow [2024-06-27 21:12:39,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:39,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:39,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:39,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:12:39,921 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:39,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:39,921 INFO L85 PathProgramCache]: Analyzing trace with hash 559699990, now seen corresponding path program 11 times [2024-06-27 21:12:39,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:39,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962655313] [2024-06-27 21:12:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:39,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:42,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:42,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962655313] [2024-06-27 21:12:42,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962655313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:42,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:42,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:42,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982661607] [2024-06-27 21:12:42,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:42,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:42,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:42,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:42,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:42,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 333 transitions, 3642 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:42,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:42,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:42,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:43,827 INFO L124 PetriNetUnfolderBase]: 2443/4058 cut-off events. [2024-06-27 21:12:43,827 INFO L125 PetriNetUnfolderBase]: For 263120/263128 co-relation queries the response was YES. [2024-06-27 21:12:43,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26545 conditions, 4058 events. 2443/4058 cut-off events. For 263120/263128 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24755 event pairs, 526 based on Foata normal form. 10/4066 useless extension candidates. Maximal degree in co-relation 26424. Up to 3651 conditions per place. [2024-06-27 21:12:43,878 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 279 selfloop transitions, 73 changer transitions 0/357 dead transitions. [2024-06-27 21:12:43,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 357 transitions, 4554 flow [2024-06-27 21:12:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:43,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:12:43,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 21:12:43,880 INFO L175 Difference]: Start difference. First operand has 277 places, 333 transitions, 3642 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:12:43,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 357 transitions, 4554 flow [2024-06-27 21:12:44,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 357 transitions, 4338 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 21:12:44,421 INFO L231 Difference]: Finished difference. Result has 275 places, 333 transitions, 3588 flow [2024-06-27 21:12:44,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3432, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3588, PETRI_PLACES=275, PETRI_TRANSITIONS=333} [2024-06-27 21:12:44,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 21:12:44,421 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 333 transitions, 3588 flow [2024-06-27 21:12:44,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:44,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:44,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:44,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:12:44,423 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:44,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:44,423 INFO L85 PathProgramCache]: Analyzing trace with hash 559462840, now seen corresponding path program 12 times [2024-06-27 21:12:44,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:44,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268207242] [2024-06-27 21:12:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:44,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:47,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:47,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268207242] [2024-06-27 21:12:47,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268207242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:47,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:47,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:47,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963735568] [2024-06-27 21:12:47,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:47,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:47,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:47,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:47,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:47,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:12:47,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 333 transitions, 3588 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:47,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:47,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:12:47,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:48,976 INFO L124 PetriNetUnfolderBase]: 2437/4050 cut-off events. [2024-06-27 21:12:48,976 INFO L125 PetriNetUnfolderBase]: For 244879/244887 co-relation queries the response was YES. [2024-06-27 21:12:49,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26106 conditions, 4050 events. 2437/4050 cut-off events. For 244879/244887 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24706 event pairs, 525 based on Foata normal form. 10/4058 useless extension candidates. Maximal degree in co-relation 25985. Up to 3646 conditions per place. [2024-06-27 21:12:49,018 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 280 selfloop transitions, 78 changer transitions 0/363 dead transitions. [2024-06-27 21:12:49,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 363 transitions, 4390 flow [2024-06-27 21:12:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:12:49,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 21:12:49,020 INFO L175 Difference]: Start difference. First operand has 275 places, 333 transitions, 3588 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:12:49,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 363 transitions, 4390 flow [2024-06-27 21:12:49,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 363 transitions, 4243 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:12:49,521 INFO L231 Difference]: Finished difference. Result has 278 places, 333 transitions, 3611 flow [2024-06-27 21:12:49,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3611, PETRI_PLACES=278, PETRI_TRANSITIONS=333} [2024-06-27 21:12:49,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 21:12:49,522 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 333 transitions, 3611 flow [2024-06-27 21:12:49,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:49,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:49,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:49,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:12:49,523 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:49,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash 959206228, now seen corresponding path program 2 times [2024-06-27 21:12:49,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:49,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218504340] [2024-06-27 21:12:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:49,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:53,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:53,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218504340] [2024-06-27 21:12:53,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218504340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:53,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:53,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:53,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874137350] [2024-06-27 21:12:53,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:53,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:53,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:53,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:53,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:53,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:12:53,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 333 transitions, 3611 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:53,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:53,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:12:53,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:54,475 INFO L124 PetriNetUnfolderBase]: 2321/3882 cut-off events. [2024-06-27 21:12:54,475 INFO L125 PetriNetUnfolderBase]: For 266628/266652 co-relation queries the response was YES. [2024-06-27 21:12:54,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25376 conditions, 3882 events. 2321/3882 cut-off events. For 266628/266652 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 23892 event pairs, 497 based on Foata normal form. 30/3858 useless extension candidates. Maximal degree in co-relation 25255. Up to 3358 conditions per place. [2024-06-27 21:12:54,518 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 250 selfloop transitions, 50 changer transitions 0/353 dead transitions. [2024-06-27 21:12:54,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 353 transitions, 4301 flow [2024-06-27 21:12:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:12:54,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 21:12:54,520 INFO L175 Difference]: Start difference. First operand has 278 places, 333 transitions, 3611 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:12:54,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 353 transitions, 4301 flow [2024-06-27 21:12:54,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 353 transitions, 4080 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 21:12:54,971 INFO L231 Difference]: Finished difference. Result has 274 places, 334 transitions, 3516 flow [2024-06-27 21:12:54,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3516, PETRI_PLACES=274, PETRI_TRANSITIONS=334} [2024-06-27 21:12:54,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-27 21:12:54,972 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 334 transitions, 3516 flow [2024-06-27 21:12:54,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:54,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:54,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:12:54,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:12:54,972 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:12:54,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:54,973 INFO L85 PathProgramCache]: Analyzing trace with hash 973491028, now seen corresponding path program 3 times [2024-06-27 21:12:54,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:54,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338328558] [2024-06-27 21:12:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:54,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:58,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:58,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338328558] [2024-06-27 21:12:58,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338328558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:58,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:58,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:58,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472741868] [2024-06-27 21:12:58,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:58,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:58,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:58,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:58,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:58,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:12:58,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 334 transitions, 3516 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:58,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:58,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:12:58,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:59,722 INFO L124 PetriNetUnfolderBase]: 2398/4002 cut-off events. [2024-06-27 21:12:59,722 INFO L125 PetriNetUnfolderBase]: For 269463/269485 co-relation queries the response was YES. [2024-06-27 21:12:59,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26488 conditions, 4002 events. 2398/4002 cut-off events. For 269463/269485 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24665 event pairs, 507 based on Foata normal form. 26/3981 useless extension candidates. Maximal degree in co-relation 26368. Up to 3317 conditions per place. [2024-06-27 21:12:59,768 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 251 selfloop transitions, 54 changer transitions 0/358 dead transitions. [2024-06-27 21:12:59,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 358 transitions, 4390 flow [2024-06-27 21:12:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:12:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:12:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:12:59,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 21:12:59,770 INFO L175 Difference]: Start difference. First operand has 274 places, 334 transitions, 3516 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:12:59,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 358 transitions, 4390 flow [2024-06-27 21:13:00,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 358 transitions, 4286 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:00,359 INFO L231 Difference]: Finished difference. Result has 276 places, 336 transitions, 3566 flow [2024-06-27 21:13:00,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3566, PETRI_PLACES=276, PETRI_TRANSITIONS=336} [2024-06-27 21:13:00,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 21:13:00,360 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 336 transitions, 3566 flow [2024-06-27 21:13:00,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:00,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:00,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:00,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:13:00,361 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:00,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash 559708918, now seen corresponding path program 4 times [2024-06-27 21:13:00,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:00,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866698980] [2024-06-27 21:13:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:00,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:04,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:04,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866698980] [2024-06-27 21:13:04,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866698980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:04,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:04,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:04,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279902821] [2024-06-27 21:13:04,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:04,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:04,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:04,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:04,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:04,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:13:04,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 336 transitions, 3566 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:04,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:04,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:13:04,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:05,378 INFO L124 PetriNetUnfolderBase]: 2367/3965 cut-off events. [2024-06-27 21:13:05,378 INFO L125 PetriNetUnfolderBase]: For 259521/259534 co-relation queries the response was YES. [2024-06-27 21:13:05,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25620 conditions, 3965 events. 2367/3965 cut-off events. For 259521/259534 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24502 event pairs, 505 based on Foata normal form. 21/3944 useless extension candidates. Maximal degree in co-relation 25499. Up to 3397 conditions per place. [2024-06-27 21:13:05,431 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 263 selfloop transitions, 45 changer transitions 0/361 dead transitions. [2024-06-27 21:13:05,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 361 transitions, 4272 flow [2024-06-27 21:13:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:13:05,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 21:13:05,433 INFO L175 Difference]: Start difference. First operand has 276 places, 336 transitions, 3566 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:13:05,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 361 transitions, 4272 flow [2024-06-27 21:13:05,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 361 transitions, 4199 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:13:05,874 INFO L231 Difference]: Finished difference. Result has 280 places, 336 transitions, 3593 flow [2024-06-27 21:13:05,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3493, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3593, PETRI_PLACES=280, PETRI_TRANSITIONS=336} [2024-06-27 21:13:05,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-27 21:13:05,875 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 336 transitions, 3593 flow [2024-06-27 21:13:05,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:05,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:05,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:05,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:13:05,876 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:05,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:05,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1031425374, now seen corresponding path program 1 times [2024-06-27 21:13:05,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:05,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110704259] [2024-06-27 21:13:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:05,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:08,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:08,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110704259] [2024-06-27 21:13:08,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110704259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:08,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:08,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:08,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597094855] [2024-06-27 21:13:08,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:08,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:08,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:08,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:08,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:08,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 336 transitions, 3593 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:08,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:08,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:08,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:09,772 INFO L124 PetriNetUnfolderBase]: 2535/4203 cut-off events. [2024-06-27 21:13:09,773 INFO L125 PetriNetUnfolderBase]: For 244616/244618 co-relation queries the response was YES. [2024-06-27 21:13:09,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26972 conditions, 4203 events. 2535/4203 cut-off events. For 244616/244618 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25698 event pairs, 516 based on Foata normal form. 2/4203 useless extension candidates. Maximal degree in co-relation 26849. Up to 3886 conditions per place. [2024-06-27 21:13:09,816 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 331 selfloop transitions, 32 changer transitions 0/368 dead transitions. [2024-06-27 21:13:09,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 368 transitions, 4623 flow [2024-06-27 21:13:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:13:09,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:13:09,818 INFO L175 Difference]: Start difference. First operand has 280 places, 336 transitions, 3593 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:13:09,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 368 transitions, 4623 flow [2024-06-27 21:13:10,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 368 transitions, 4522 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:10,313 INFO L231 Difference]: Finished difference. Result has 282 places, 340 transitions, 3657 flow [2024-06-27 21:13:10,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3657, PETRI_PLACES=282, PETRI_TRANSITIONS=340} [2024-06-27 21:13:10,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 21:13:10,314 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 340 transitions, 3657 flow [2024-06-27 21:13:10,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:10,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:10,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:10,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:13:10,314 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:10,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:10,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1090969404, now seen corresponding path program 2 times [2024-06-27 21:13:10,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:10,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739781271] [2024-06-27 21:13:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:10,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:12,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:12,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739781271] [2024-06-27 21:13:12,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739781271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:12,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:12,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648196005] [2024-06-27 21:13:12,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:12,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:12,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:12,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:12,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 340 transitions, 3657 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:12,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:12,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:12,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:13,971 INFO L124 PetriNetUnfolderBase]: 2543/4215 cut-off events. [2024-06-27 21:13:13,972 INFO L125 PetriNetUnfolderBase]: For 251004/251006 co-relation queries the response was YES. [2024-06-27 21:13:14,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27121 conditions, 4215 events. 2543/4215 cut-off events. For 251004/251006 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25782 event pairs, 554 based on Foata normal form. 2/4215 useless extension candidates. Maximal degree in co-relation 26997. Up to 3935 conditions per place. [2024-06-27 21:13:14,021 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 330 selfloop transitions, 29 changer transitions 0/364 dead transitions. [2024-06-27 21:13:14,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 364 transitions, 4485 flow [2024-06-27 21:13:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:13:14,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:13:14,023 INFO L175 Difference]: Start difference. First operand has 282 places, 340 transitions, 3657 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:13:14,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 364 transitions, 4485 flow [2024-06-27 21:13:14,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 364 transitions, 4379 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 21:13:14,691 INFO L231 Difference]: Finished difference. Result has 286 places, 342 transitions, 3668 flow [2024-06-27 21:13:14,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3668, PETRI_PLACES=286, PETRI_TRANSITIONS=342} [2024-06-27 21:13:14,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-27 21:13:14,692 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 342 transitions, 3668 flow [2024-06-27 21:13:14,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:14,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:14,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:14,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:13:14,693 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:14,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1206260574, now seen corresponding path program 3 times [2024-06-27 21:13:14,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:14,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869165867] [2024-06-27 21:13:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:14,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:16,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:16,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869165867] [2024-06-27 21:13:16,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869165867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:16,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:16,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920246195] [2024-06-27 21:13:16,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:16,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:16,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 342 transitions, 3668 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:16,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:16,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:16,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:18,365 INFO L124 PetriNetUnfolderBase]: 2551/4227 cut-off events. [2024-06-27 21:13:18,365 INFO L125 PetriNetUnfolderBase]: For 258030/258032 co-relation queries the response was YES. [2024-06-27 21:13:18,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27234 conditions, 4227 events. 2551/4227 cut-off events. For 258030/258032 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25873 event pairs, 554 based on Foata normal form. 2/4227 useless extension candidates. Maximal degree in co-relation 27108. Up to 3964 conditions per place. [2024-06-27 21:13:18,413 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 21 changer transitions 0/362 dead transitions. [2024-06-27 21:13:18,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 362 transitions, 4468 flow [2024-06-27 21:13:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:18,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:13:18,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-27 21:13:18,415 INFO L175 Difference]: Start difference. First operand has 286 places, 342 transitions, 3668 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:13:18,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 362 transitions, 4468 flow [2024-06-27 21:13:18,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 362 transitions, 4387 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:18,882 INFO L231 Difference]: Finished difference. Result has 288 places, 344 transitions, 3676 flow [2024-06-27 21:13:18,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3676, PETRI_PLACES=288, PETRI_TRANSITIONS=344} [2024-06-27 21:13:18,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-27 21:13:18,882 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 344 transitions, 3676 flow [2024-06-27 21:13:18,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:18,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:18,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:18,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:13:18,883 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:18,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:18,883 INFO L85 PathProgramCache]: Analyzing trace with hash -913092546, now seen corresponding path program 1 times [2024-06-27 21:13:18,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:18,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778557934] [2024-06-27 21:13:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:18,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:22,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:22,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778557934] [2024-06-27 21:13:22,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778557934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:22,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:22,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:22,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432037160] [2024-06-27 21:13:22,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:22,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:22,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:22,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:22,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:22,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:22,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 344 transitions, 3676 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:22,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:22,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:22,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:23,638 INFO L124 PetriNetUnfolderBase]: 2559/4235 cut-off events. [2024-06-27 21:13:23,639 INFO L125 PetriNetUnfolderBase]: For 264989/264991 co-relation queries the response was YES. [2024-06-27 21:13:23,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27372 conditions, 4235 events. 2559/4235 cut-off events. For 264989/264991 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25858 event pairs, 532 based on Foata normal form. 2/4235 useless extension candidates. Maximal degree in co-relation 27245. Up to 3953 conditions per place. [2024-06-27 21:13:23,686 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 28 changer transitions 0/367 dead transitions. [2024-06-27 21:13:23,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 367 transitions, 4496 flow [2024-06-27 21:13:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:13:23,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:13:23,688 INFO L175 Difference]: Start difference. First operand has 288 places, 344 transitions, 3676 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:13:23,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 367 transitions, 4496 flow [2024-06-27 21:13:24,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 367 transitions, 4427 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:24,180 INFO L231 Difference]: Finished difference. Result has 290 places, 346 transitions, 3714 flow [2024-06-27 21:13:24,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3607, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3714, PETRI_PLACES=290, PETRI_TRANSITIONS=346} [2024-06-27 21:13:24,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-27 21:13:24,181 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 346 transitions, 3714 flow [2024-06-27 21:13:24,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:24,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:24,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:24,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:13:24,181 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:24,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash 736840252, now seen corresponding path program 4 times [2024-06-27 21:13:24,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:24,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265657956] [2024-06-27 21:13:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:24,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:26,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:26,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265657956] [2024-06-27 21:13:26,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265657956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:26,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:26,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:26,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495597193] [2024-06-27 21:13:26,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:26,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:26,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:26,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:26,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:26,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:26,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 346 transitions, 3714 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:26,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:26,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:26,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:27,628 INFO L124 PetriNetUnfolderBase]: 2554/4232 cut-off events. [2024-06-27 21:13:27,628 INFO L125 PetriNetUnfolderBase]: For 267050/267052 co-relation queries the response was YES. [2024-06-27 21:13:27,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27340 conditions, 4232 events. 2554/4232 cut-off events. For 267050/267052 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25887 event pairs, 515 based on Foata normal form. 2/4232 useless extension candidates. Maximal degree in co-relation 27212. Up to 3927 conditions per place. [2024-06-27 21:13:27,680 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 30 changer transitions 0/371 dead transitions. [2024-06-27 21:13:27,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 371 transitions, 4516 flow [2024-06-27 21:13:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:13:27,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 21:13:27,681 INFO L175 Difference]: Start difference. First operand has 290 places, 346 transitions, 3714 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:13:27,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 371 transitions, 4516 flow [2024-06-27 21:13:28,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 371 transitions, 4401 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:28,262 INFO L231 Difference]: Finished difference. Result has 291 places, 346 transitions, 3670 flow [2024-06-27 21:13:28,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3670, PETRI_PLACES=291, PETRI_TRANSITIONS=346} [2024-06-27 21:13:28,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-27 21:13:28,263 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 346 transitions, 3670 flow [2024-06-27 21:13:28,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:28,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:28,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:28,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:13:28,263 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:28,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash 737024950, now seen corresponding path program 2 times [2024-06-27 21:13:28,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:28,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549408575] [2024-06-27 21:13:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:28,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:31,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:31,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549408575] [2024-06-27 21:13:31,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549408575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:31,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:31,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:31,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363379902] [2024-06-27 21:13:31,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:31,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:31,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:31,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:31,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 346 transitions, 3670 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:31,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:31,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:31,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:32,928 INFO L124 PetriNetUnfolderBase]: 2562/4240 cut-off events. [2024-06-27 21:13:32,928 INFO L125 PetriNetUnfolderBase]: For 273779/273781 co-relation queries the response was YES. [2024-06-27 21:13:32,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27460 conditions, 4240 events. 2562/4240 cut-off events. For 273779/273781 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25908 event pairs, 531 based on Foata normal form. 2/4240 useless extension candidates. Maximal degree in co-relation 27331. Up to 3952 conditions per place. [2024-06-27 21:13:32,981 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 333 selfloop transitions, 30 changer transitions 0/368 dead transitions. [2024-06-27 21:13:32,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 368 transitions, 4494 flow [2024-06-27 21:13:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:13:32,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 21:13:32,983 INFO L175 Difference]: Start difference. First operand has 291 places, 346 transitions, 3670 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:13:32,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 368 transitions, 4494 flow [2024-06-27 21:13:33,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 368 transitions, 4425 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:33,512 INFO L231 Difference]: Finished difference. Result has 292 places, 348 transitions, 3719 flow [2024-06-27 21:13:33,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3601, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3719, PETRI_PLACES=292, PETRI_TRANSITIONS=348} [2024-06-27 21:13:33,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-27 21:13:33,512 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 348 transitions, 3719 flow [2024-06-27 21:13:33,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:33,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:33,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:33,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:13:33,513 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:33,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:33,513 INFO L85 PathProgramCache]: Analyzing trace with hash 965156740, now seen corresponding path program 3 times [2024-06-27 21:13:33,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:33,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009402737] [2024-06-27 21:13:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:33,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:36,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:36,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009402737] [2024-06-27 21:13:36,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009402737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:36,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:36,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:36,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520389552] [2024-06-27 21:13:36,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:36,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:36,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 348 transitions, 3719 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:36,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:36,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:36,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:38,191 INFO L124 PetriNetUnfolderBase]: 2570/4257 cut-off events. [2024-06-27 21:13:38,191 INFO L125 PetriNetUnfolderBase]: For 275381/275385 co-relation queries the response was YES. [2024-06-27 21:13:38,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27668 conditions, 4257 events. 2570/4257 cut-off events. For 275381/275385 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 26047 event pairs, 538 based on Foata normal form. 4/4259 useless extension candidates. Maximal degree in co-relation 27538. Up to 3970 conditions per place. [2024-06-27 21:13:38,243 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 333 selfloop transitions, 27 changer transitions 0/365 dead transitions. [2024-06-27 21:13:38,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 365 transitions, 4527 flow [2024-06-27 21:13:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:13:38,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:13:38,245 INFO L175 Difference]: Start difference. First operand has 292 places, 348 transitions, 3719 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:13:38,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 365 transitions, 4527 flow [2024-06-27 21:13:38,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 365 transitions, 4425 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:38,826 INFO L231 Difference]: Finished difference. Result has 294 places, 350 transitions, 3730 flow [2024-06-27 21:13:38,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3730, PETRI_PLACES=294, PETRI_TRANSITIONS=350} [2024-06-27 21:13:38,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-27 21:13:38,826 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 350 transitions, 3730 flow [2024-06-27 21:13:38,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:38,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:38,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:38,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:13:38,827 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:38,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:38,827 INFO L85 PathProgramCache]: Analyzing trace with hash 973496980, now seen corresponding path program 4 times [2024-06-27 21:13:38,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:38,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067984814] [2024-06-27 21:13:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:38,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:41,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:41,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067984814] [2024-06-27 21:13:41,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067984814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:41,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:41,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:41,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460017942] [2024-06-27 21:13:41,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:41,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:41,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:41,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:41,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:41,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 350 transitions, 3730 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:41,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:41,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:41,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:43,084 INFO L124 PetriNetUnfolderBase]: 2565/4250 cut-off events. [2024-06-27 21:13:43,084 INFO L125 PetriNetUnfolderBase]: For 269420/269424 co-relation queries the response was YES. [2024-06-27 21:13:43,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27377 conditions, 4250 events. 2565/4250 cut-off events. For 269420/269424 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 26020 event pairs, 529 based on Foata normal form. 4/4252 useless extension candidates. Maximal degree in co-relation 27246. Up to 3937 conditions per place. [2024-06-27 21:13:43,134 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 328 selfloop transitions, 34 changer transitions 0/367 dead transitions. [2024-06-27 21:13:43,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 367 transitions, 4542 flow [2024-06-27 21:13:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:13:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:13:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:13:43,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:13:43,136 INFO L175 Difference]: Start difference. First operand has 294 places, 350 transitions, 3730 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:13:43,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 367 transitions, 4542 flow [2024-06-27 21:13:43,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 367 transitions, 4449 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:43,771 INFO L231 Difference]: Finished difference. Result has 296 places, 352 transitions, 3764 flow [2024-06-27 21:13:43,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3764, PETRI_PLACES=296, PETRI_TRANSITIONS=352} [2024-06-27 21:13:43,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-27 21:13:43,772 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 352 transitions, 3764 flow [2024-06-27 21:13:43,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:43,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:43,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:43,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:13:43,773 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:43,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:43,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1083398231, now seen corresponding path program 1 times [2024-06-27 21:13:43,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:43,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539356464] [2024-06-27 21:13:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:43,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:47,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:47,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539356464] [2024-06-27 21:13:47,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539356464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:47,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:47,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:47,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291692072] [2024-06-27 21:13:47,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:47,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:47,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:47,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:47,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:47,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 352 transitions, 3764 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:47,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:47,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:47,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:48,713 INFO L124 PetriNetUnfolderBase]: 2641/4379 cut-off events. [2024-06-27 21:13:48,714 INFO L125 PetriNetUnfolderBase]: For 293519/293525 co-relation queries the response was YES. [2024-06-27 21:13:48,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28172 conditions, 4379 events. 2641/4379 cut-off events. For 293519/293525 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26843 event pairs, 457 based on Foata normal form. 14/4391 useless extension candidates. Maximal degree in co-relation 28040. Up to 3762 conditions per place. [2024-06-27 21:13:48,765 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 59 changer transitions 0/406 dead transitions. [2024-06-27 21:13:48,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 406 transitions, 4947 flow [2024-06-27 21:13:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:13:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:13:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 21:13:48,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-27 21:13:48,767 INFO L175 Difference]: Start difference. First operand has 296 places, 352 transitions, 3764 flow. Second operand 11 states and 188 transitions. [2024-06-27 21:13:48,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 406 transitions, 4947 flow [2024-06-27 21:13:49,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 406 transitions, 4836 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:49,378 INFO L231 Difference]: Finished difference. Result has 304 places, 357 transitions, 3866 flow [2024-06-27 21:13:49,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3866, PETRI_PLACES=304, PETRI_TRANSITIONS=357} [2024-06-27 21:13:49,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-27 21:13:49,378 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 357 transitions, 3866 flow [2024-06-27 21:13:49,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:49,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:49,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:49,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:13:49,379 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:49,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:49,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1075988921, now seen corresponding path program 2 times [2024-06-27 21:13:49,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:49,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425471464] [2024-06-27 21:13:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:49,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:52,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:52,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425471464] [2024-06-27 21:13:52,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425471464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:52,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:52,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389550578] [2024-06-27 21:13:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:52,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:52,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:52,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:52,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:52,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:52,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 357 transitions, 3866 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:52,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:52,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:52,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:54,467 INFO L124 PetriNetUnfolderBase]: 2733/4523 cut-off events. [2024-06-27 21:13:54,467 INFO L125 PetriNetUnfolderBase]: For 302533/302539 co-relation queries the response was YES. [2024-06-27 21:13:54,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29382 conditions, 4523 events. 2733/4523 cut-off events. For 302533/302539 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27903 event pairs, 557 based on Foata normal form. 14/4535 useless extension candidates. Maximal degree in co-relation 29247. Up to 4048 conditions per place. [2024-06-27 21:13:54,512 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 346 selfloop transitions, 64 changer transitions 0/415 dead transitions. [2024-06-27 21:13:54,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 415 transitions, 5020 flow [2024-06-27 21:13:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:13:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:13:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-27 21:13:54,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 21:13:54,514 INFO L175 Difference]: Start difference. First operand has 304 places, 357 transitions, 3866 flow. Second operand 12 states and 195 transitions. [2024-06-27 21:13:54,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 415 transitions, 5020 flow [2024-06-27 21:13:55,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 415 transitions, 4844 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 21:13:55,069 INFO L231 Difference]: Finished difference. Result has 309 places, 370 transitions, 4016 flow [2024-06-27 21:13:55,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4016, PETRI_PLACES=309, PETRI_TRANSITIONS=370} [2024-06-27 21:13:55,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-27 21:13:55,070 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 370 transitions, 4016 flow [2024-06-27 21:13:55,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:55,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:55,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:13:55,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:13:55,070 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:13:55,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:55,071 INFO L85 PathProgramCache]: Analyzing trace with hash -24656953, now seen corresponding path program 1 times [2024-06-27 21:13:55,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:55,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886938639] [2024-06-27 21:13:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:55,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:13:58,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:58,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886938639] [2024-06-27 21:13:58,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886938639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:58,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:58,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:58,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742213266] [2024-06-27 21:13:58,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:58,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:58,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:58,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:58,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:58,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:13:58,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 370 transitions, 4016 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:58,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:58,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:13:58,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:59,548 INFO L124 PetriNetUnfolderBase]: 2746/4551 cut-off events. [2024-06-27 21:13:59,549 INFO L125 PetriNetUnfolderBase]: For 292885/292891 co-relation queries the response was YES. [2024-06-27 21:13:59,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29520 conditions, 4551 events. 2746/4551 cut-off events. For 292885/292891 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 28192 event pairs, 581 based on Foata normal form. 7/4556 useless extension candidates. Maximal degree in co-relation 29385. Up to 4124 conditions per place. [2024-06-27 21:13:59,603 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 347 selfloop transitions, 63 changer transitions 0/415 dead transitions. [2024-06-27 21:13:59,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 415 transitions, 5222 flow [2024-06-27 21:13:59,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:13:59,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:13:59,605 INFO L175 Difference]: Start difference. First operand has 309 places, 370 transitions, 4016 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:13:59,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 415 transitions, 5222 flow [2024-06-27 21:14:00,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 415 transitions, 5088 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:00,303 INFO L231 Difference]: Finished difference. Result has 311 places, 376 transitions, 4140 flow [2024-06-27 21:14:00,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3882, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4140, PETRI_PLACES=311, PETRI_TRANSITIONS=376} [2024-06-27 21:14:00,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-27 21:14:00,304 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 376 transitions, 4140 flow [2024-06-27 21:14:00,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:00,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:00,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:00,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:14:00,305 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:00,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1359099241, now seen corresponding path program 1 times [2024-06-27 21:14:00,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:00,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225442293] [2024-06-27 21:14:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:00,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:03,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:03,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225442293] [2024-06-27 21:14:03,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225442293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:03,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:03,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:03,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480170116] [2024-06-27 21:14:03,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:03,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:03,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:03,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:03,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:03,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:03,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 376 transitions, 4140 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:03,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:03,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:03,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:05,620 INFO L124 PetriNetUnfolderBase]: 2782/4597 cut-off events. [2024-06-27 21:14:05,620 INFO L125 PetriNetUnfolderBase]: For 311864/311870 co-relation queries the response was YES. [2024-06-27 21:14:05,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30455 conditions, 4597 events. 2782/4597 cut-off events. For 311864/311870 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 28467 event pairs, 567 based on Foata normal form. 8/4603 useless extension candidates. Maximal degree in co-relation 30319. Up to 4121 conditions per place. [2024-06-27 21:14:05,667 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 80 changer transitions 0/429 dead transitions. [2024-06-27 21:14:05,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 429 transitions, 5442 flow [2024-06-27 21:14:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:14:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:14:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 21:14:05,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-27 21:14:05,668 INFO L175 Difference]: Start difference. First operand has 311 places, 376 transitions, 4140 flow. Second operand 11 states and 185 transitions. [2024-06-27 21:14:05,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 429 transitions, 5442 flow [2024-06-27 21:14:06,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 429 transitions, 5287 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:06,410 INFO L231 Difference]: Finished difference. Result has 318 places, 388 transitions, 4355 flow [2024-06-27 21:14:06,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3991, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4355, PETRI_PLACES=318, PETRI_TRANSITIONS=388} [2024-06-27 21:14:06,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 21:14:06,412 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 388 transitions, 4355 flow [2024-06-27 21:14:06,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:06,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:06,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:06,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:14:06,413 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:06,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:06,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1189586289, now seen corresponding path program 2 times [2024-06-27 21:14:06,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:06,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827153456] [2024-06-27 21:14:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:06,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:10,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:10,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827153456] [2024-06-27 21:14:10,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827153456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:10,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:10,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:10,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198512543] [2024-06-27 21:14:10,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:10,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:10,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:10,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:10,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:10,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 388 transitions, 4355 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:10,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:10,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:10,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:12,135 INFO L124 PetriNetUnfolderBase]: 2787/4602 cut-off events. [2024-06-27 21:14:12,136 INFO L125 PetriNetUnfolderBase]: For 318899/318905 co-relation queries the response was YES. [2024-06-27 21:14:12,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31071 conditions, 4602 events. 2787/4602 cut-off events. For 318899/318905 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 28445 event pairs, 577 based on Foata normal form. 7/4607 useless extension candidates. Maximal degree in co-relation 30932. Up to 4200 conditions per place. [2024-06-27 21:14:12,196 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 356 selfloop transitions, 64 changer transitions 0/425 dead transitions. [2024-06-27 21:14:12,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 425 transitions, 5337 flow [2024-06-27 21:14:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:14:12,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 21:14:12,198 INFO L175 Difference]: Start difference. First operand has 318 places, 388 transitions, 4355 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:14:12,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 425 transitions, 5337 flow [2024-06-27 21:14:13,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 425 transitions, 5183 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 21:14:13,055 INFO L231 Difference]: Finished difference. Result has 321 places, 391 transitions, 4384 flow [2024-06-27 21:14:13,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4384, PETRI_PLACES=321, PETRI_TRANSITIONS=391} [2024-06-27 21:14:13,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-27 21:14:13,055 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 391 transitions, 4384 flow [2024-06-27 21:14:13,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:13,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:13,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:13,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:14:13,056 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:13,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1936870487, now seen corresponding path program 2 times [2024-06-27 21:14:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:13,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586689005] [2024-06-27 21:14:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:13,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:16,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:16,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586689005] [2024-06-27 21:14:16,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586689005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:16,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:16,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:16,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812827852] [2024-06-27 21:14:16,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:16,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:16,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:16,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:16,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:16,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 391 transitions, 4384 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:16,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:16,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:16,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:18,620 INFO L124 PetriNetUnfolderBase]: 2823/4656 cut-off events. [2024-06-27 21:14:18,620 INFO L125 PetriNetUnfolderBase]: For 335737/335743 co-relation queries the response was YES. [2024-06-27 21:14:18,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31741 conditions, 4656 events. 2823/4656 cut-off events. For 335737/335743 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28782 event pairs, 566 based on Foata normal form. 8/4662 useless extension candidates. Maximal degree in co-relation 31600. Up to 4161 conditions per place. [2024-06-27 21:14:18,676 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 91 changer transitions 0/451 dead transitions. [2024-06-27 21:14:18,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 451 transitions, 5904 flow [2024-06-27 21:14:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 21:14:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 21:14:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 227 transitions. [2024-06-27 21:14:18,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38605442176870747 [2024-06-27 21:14:18,681 INFO L175 Difference]: Start difference. First operand has 321 places, 391 transitions, 4384 flow. Second operand 14 states and 227 transitions. [2024-06-27 21:14:18,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 451 transitions, 5904 flow [2024-06-27 21:14:19,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 451 transitions, 5719 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 21:14:19,651 INFO L231 Difference]: Finished difference. Result has 328 places, 403 transitions, 4589 flow [2024-06-27 21:14:19,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4589, PETRI_PLACES=328, PETRI_TRANSITIONS=403} [2024-06-27 21:14:19,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 21:14:19,664 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 403 transitions, 4589 flow [2024-06-27 21:14:19,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:19,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:19,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:19,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:14:19,665 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:19,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:19,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1181967907, now seen corresponding path program 3 times [2024-06-27 21:14:19,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:19,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620566556] [2024-06-27 21:14:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:19,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:23,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:23,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620566556] [2024-06-27 21:14:23,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620566556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:23,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:23,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:23,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917406841] [2024-06-27 21:14:23,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:23,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:23,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:23,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:23,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:23,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:23,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 403 transitions, 4589 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:23,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:23,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:23,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:25,496 INFO L124 PetriNetUnfolderBase]: 2828/4665 cut-off events. [2024-06-27 21:14:25,496 INFO L125 PetriNetUnfolderBase]: For 340226/340232 co-relation queries the response was YES. [2024-06-27 21:14:25,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31983 conditions, 4665 events. 2828/4665 cut-off events. For 340226/340232 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28846 event pairs, 583 based on Foata normal form. 7/4670 useless extension candidates. Maximal degree in co-relation 31841. Up to 4250 conditions per place. [2024-06-27 21:14:25,550 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 364 selfloop transitions, 74 changer transitions 0/443 dead transitions. [2024-06-27 21:14:25,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 443 transitions, 5619 flow [2024-06-27 21:14:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:14:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:14:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-27 21:14:25,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-27 21:14:25,552 INFO L175 Difference]: Start difference. First operand has 328 places, 403 transitions, 4589 flow. Second operand 12 states and 191 transitions. [2024-06-27 21:14:25,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 443 transitions, 5619 flow [2024-06-27 21:14:26,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 443 transitions, 5395 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-27 21:14:26,597 INFO L231 Difference]: Finished difference. Result has 329 places, 406 transitions, 4574 flow [2024-06-27 21:14:26,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4574, PETRI_PLACES=329, PETRI_TRANSITIONS=406} [2024-06-27 21:14:26,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 21:14:26,597 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 406 transitions, 4574 flow [2024-06-27 21:14:26,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:26,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:26,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:26,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:14:26,598 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:26,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash -17985877, now seen corresponding path program 3 times [2024-06-27 21:14:26,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:26,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228709338] [2024-06-27 21:14:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:26,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:30,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:30,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228709338] [2024-06-27 21:14:30,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228709338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:30,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:30,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:30,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802176141] [2024-06-27 21:14:30,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:30,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:30,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:30,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:30,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:30,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:30,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 406 transitions, 4574 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:30,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:30,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:30,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:32,453 INFO L124 PetriNetUnfolderBase]: 2822/4657 cut-off events. [2024-06-27 21:14:32,454 INFO L125 PetriNetUnfolderBase]: For 344382/344388 co-relation queries the response was YES. [2024-06-27 21:14:32,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31717 conditions, 4657 events. 2822/4657 cut-off events. For 344382/344388 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28855 event pairs, 566 based on Foata normal form. 8/4663 useless extension candidates. Maximal degree in co-relation 31574. Up to 4163 conditions per place. [2024-06-27 21:14:32,514 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 354 selfloop transitions, 93 changer transitions 0/452 dead transitions. [2024-06-27 21:14:32,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 452 transitions, 5754 flow [2024-06-27 21:14:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 21:14:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 21:14:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 223 transitions. [2024-06-27 21:14:32,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792517006802721 [2024-06-27 21:14:32,517 INFO L175 Difference]: Start difference. First operand has 329 places, 406 transitions, 4574 flow. Second operand 14 states and 223 transitions. [2024-06-27 21:14:32,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 452 transitions, 5754 flow [2024-06-27 21:14:33,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 452 transitions, 5536 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-27 21:14:33,635 INFO L231 Difference]: Finished difference. Result has 333 places, 406 transitions, 4548 flow [2024-06-27 21:14:33,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4356, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4548, PETRI_PLACES=333, PETRI_TRANSITIONS=406} [2024-06-27 21:14:33,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 21:14:33,636 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 406 transitions, 4548 flow [2024-06-27 21:14:33,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:33,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:33,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:33,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:14:33,636 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:33,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:33,637 INFO L85 PathProgramCache]: Analyzing trace with hash -514128313, now seen corresponding path program 3 times [2024-06-27 21:14:33,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:33,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109839261] [2024-06-27 21:14:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:33,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:36,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:36,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109839261] [2024-06-27 21:14:36,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109839261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:36,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:36,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:36,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029206481] [2024-06-27 21:14:36,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:36,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:36,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:36,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:36,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:37,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:37,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 406 transitions, 4548 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:37,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:37,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:37,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:38,924 INFO L124 PetriNetUnfolderBase]: 2858/4708 cut-off events. [2024-06-27 21:14:38,925 INFO L125 PetriNetUnfolderBase]: For 373472/373474 co-relation queries the response was YES. [2024-06-27 21:14:38,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32165 conditions, 4708 events. 2858/4708 cut-off events. For 373472/373474 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29105 event pairs, 571 based on Foata normal form. 8/4714 useless extension candidates. Maximal degree in co-relation 32022. Up to 4230 conditions per place. [2024-06-27 21:14:38,978 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 379 selfloop transitions, 61 changer transitions 0/445 dead transitions. [2024-06-27 21:14:38,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 445 transitions, 5607 flow [2024-06-27 21:14:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:14:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:14:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-27 21:14:38,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-27 21:14:38,979 INFO L175 Difference]: Start difference. First operand has 333 places, 406 transitions, 4548 flow. Second operand 12 states and 190 transitions. [2024-06-27 21:14:38,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 445 transitions, 5607 flow [2024-06-27 21:14:40,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 445 transitions, 5400 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-27 21:14:40,009 INFO L231 Difference]: Finished difference. Result has 333 places, 409 transitions, 4527 flow [2024-06-27 21:14:40,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4341, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4527, PETRI_PLACES=333, PETRI_TRANSITIONS=409} [2024-06-27 21:14:40,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 21:14:40,010 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 409 transitions, 4527 flow [2024-06-27 21:14:40,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:40,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:40,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:40,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:14:40,010 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:40,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1710439017, now seen corresponding path program 4 times [2024-06-27 21:14:40,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:40,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409536753] [2024-06-27 21:14:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:40,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:43,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:43,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409536753] [2024-06-27 21:14:43,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409536753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:43,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:43,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:43,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994598319] [2024-06-27 21:14:43,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:43,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:43,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:43,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:43,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 409 transitions, 4527 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:43,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:43,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:43,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:45,941 INFO L124 PetriNetUnfolderBase]: 2879/4741 cut-off events. [2024-06-27 21:14:45,941 INFO L125 PetriNetUnfolderBase]: For 366413/366415 co-relation queries the response was YES. [2024-06-27 21:14:45,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32702 conditions, 4741 events. 2879/4741 cut-off events. For 366413/366415 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 29357 event pairs, 614 based on Foata normal form. 1/4739 useless extension candidates. Maximal degree in co-relation 32557. Up to 4007 conditions per place. [2024-06-27 21:14:46,006 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 290 selfloop transitions, 162 changer transitions 0/457 dead transitions. [2024-06-27 21:14:46,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 457 transitions, 6299 flow [2024-06-27 21:14:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:14:46,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 21:14:46,008 INFO L175 Difference]: Start difference. First operand has 333 places, 409 transitions, 4527 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:14:46,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 457 transitions, 6299 flow [2024-06-27 21:14:47,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 457 transitions, 6166 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:47,190 INFO L231 Difference]: Finished difference. Result has 335 places, 421 transitions, 5002 flow [2024-06-27 21:14:47,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5002, PETRI_PLACES=335, PETRI_TRANSITIONS=421} [2024-06-27 21:14:47,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-27 21:14:47,191 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 421 transitions, 5002 flow [2024-06-27 21:14:47,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:47,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:47,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:47,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:14:47,192 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:47,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash 669865281, now seen corresponding path program 1 times [2024-06-27 21:14:47,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:47,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965916699] [2024-06-27 21:14:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:47,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:50,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:50,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965916699] [2024-06-27 21:14:50,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965916699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:50,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:50,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:50,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063077169] [2024-06-27 21:14:50,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:50,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:50,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:50,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:50,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 421 transitions, 5002 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:50,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:50,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:50,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:52,623 INFO L124 PetriNetUnfolderBase]: 2921/4800 cut-off events. [2024-06-27 21:14:52,623 INFO L125 PetriNetUnfolderBase]: For 395605/395611 co-relation queries the response was YES. [2024-06-27 21:14:52,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34114 conditions, 4800 events. 2921/4800 cut-off events. For 395605/395611 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 29678 event pairs, 603 based on Foata normal form. 8/4805 useless extension candidates. Maximal degree in co-relation 33968. Up to 4210 conditions per place. [2024-06-27 21:14:52,685 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 334 selfloop transitions, 131 changer transitions 0/470 dead transitions. [2024-06-27 21:14:52,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 470 transitions, 6540 flow [2024-06-27 21:14:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:14:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:14:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-27 21:14:52,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3948412698412698 [2024-06-27 21:14:52,687 INFO L175 Difference]: Start difference. First operand has 335 places, 421 transitions, 5002 flow. Second operand 12 states and 199 transitions. [2024-06-27 21:14:52,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 470 transitions, 6540 flow [2024-06-27 21:14:53,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 470 transitions, 6348 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-27 21:14:53,963 INFO L231 Difference]: Finished difference. Result has 344 places, 430 transitions, 5246 flow [2024-06-27 21:14:53,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4810, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5246, PETRI_PLACES=344, PETRI_TRANSITIONS=430} [2024-06-27 21:14:53,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 21:14:53,963 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 430 transitions, 5246 flow [2024-06-27 21:14:53,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:53,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:53,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:53,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:14:53,964 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:14:53,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash 664203999, now seen corresponding path program 5 times [2024-06-27 21:14:53,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:53,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530259190] [2024-06-27 21:14:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:53,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:57,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:57,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530259190] [2024-06-27 21:14:57,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530259190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:57,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:57,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:14:57,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627144979] [2024-06-27 21:14:57,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:57,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:14:57,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:57,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:14:57,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:14:57,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:14:57,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 430 transitions, 5246 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:57,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:57,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:14:57,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:59,259 INFO L124 PetriNetUnfolderBase]: 2926/4808 cut-off events. [2024-06-27 21:14:59,259 INFO L125 PetriNetUnfolderBase]: For 402889/402891 co-relation queries the response was YES. [2024-06-27 21:14:59,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34810 conditions, 4808 events. 2926/4808 cut-off events. For 402889/402891 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 29768 event pairs, 617 based on Foata normal form. 1/4806 useless extension candidates. Maximal degree in co-relation 34662. Up to 4071 conditions per place. [2024-06-27 21:14:59,327 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 308 selfloop transitions, 157 changer transitions 0/470 dead transitions. [2024-06-27 21:14:59,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 470 transitions, 7010 flow [2024-06-27 21:14:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:14:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:14:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:14:59,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:14:59,329 INFO L175 Difference]: Start difference. First operand has 344 places, 430 transitions, 5246 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:14:59,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 470 transitions, 7010 flow [2024-06-27 21:15:00,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 470 transitions, 6771 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 21:15:00,688 INFO L231 Difference]: Finished difference. Result has 346 places, 433 transitions, 5381 flow [2024-06-27 21:15:00,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5007, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5381, PETRI_PLACES=346, PETRI_TRANSITIONS=433} [2024-06-27 21:15:00,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-27 21:15:00,689 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 433 transitions, 5381 flow [2024-06-27 21:15:00,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:00,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:00,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:00,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:15:00,689 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:00,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2080040453, now seen corresponding path program 6 times [2024-06-27 21:15:00,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:00,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398315402] [2024-06-27 21:15:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:00,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:04,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:04,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398315402] [2024-06-27 21:15:04,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398315402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:04,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:04,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:04,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218623054] [2024-06-27 21:15:04,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:04,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:04,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:04,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:04,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:04,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:04,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 433 transitions, 5381 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:04,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:04,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:04,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:06,530 INFO L124 PetriNetUnfolderBase]: 2936/4827 cut-off events. [2024-06-27 21:15:06,531 INFO L125 PetriNetUnfolderBase]: For 411818/411822 co-relation queries the response was YES. [2024-06-27 21:15:06,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35196 conditions, 4827 events. 2936/4827 cut-off events. For 411818/411822 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29985 event pairs, 609 based on Foata normal form. 3/4828 useless extension candidates. Maximal degree in co-relation 35046. Up to 4307 conditions per place. [2024-06-27 21:15:06,587 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 361 selfloop transitions, 102 changer transitions 0/468 dead transitions. [2024-06-27 21:15:06,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 468 transitions, 6477 flow [2024-06-27 21:15:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:15:06,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 21:15:06,589 INFO L175 Difference]: Start difference. First operand has 346 places, 433 transitions, 5381 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:15:06,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 468 transitions, 6477 flow [2024-06-27 21:15:07,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 468 transitions, 6047 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 21:15:07,762 INFO L231 Difference]: Finished difference. Result has 348 places, 439 transitions, 5257 flow [2024-06-27 21:15:07,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4975, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5257, PETRI_PLACES=348, PETRI_TRANSITIONS=439} [2024-06-27 21:15:07,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-27 21:15:07,762 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 439 transitions, 5257 flow [2024-06-27 21:15:07,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:07,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:07,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:07,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:15:07,763 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:07,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:07,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2074499513, now seen corresponding path program 7 times [2024-06-27 21:15:07,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:07,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888843283] [2024-06-27 21:15:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:07,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:11,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:11,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888843283] [2024-06-27 21:15:11,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888843283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:11,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:11,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:11,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550724531] [2024-06-27 21:15:11,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:11,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:11,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:11,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:11,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:11,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:11,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 439 transitions, 5257 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:11,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:11,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:11,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:13,312 INFO L124 PetriNetUnfolderBase]: 2941/4839 cut-off events. [2024-06-27 21:15:13,312 INFO L125 PetriNetUnfolderBase]: For 419323/419325 co-relation queries the response was YES. [2024-06-27 21:15:13,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35079 conditions, 4839 events. 2941/4839 cut-off events. For 419323/419325 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30058 event pairs, 619 based on Foata normal form. 1/4837 useless extension candidates. Maximal degree in co-relation 34928. Up to 4087 conditions per place. [2024-06-27 21:15:13,369 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 295 selfloop transitions, 173 changer transitions 0/473 dead transitions. [2024-06-27 21:15:13,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 473 transitions, 6667 flow [2024-06-27 21:15:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:15:13,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:15:13,371 INFO L175 Difference]: Start difference. First operand has 348 places, 439 transitions, 5257 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:15:13,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 473 transitions, 6667 flow [2024-06-27 21:15:14,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 473 transitions, 6435 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:14,736 INFO L231 Difference]: Finished difference. Result has 351 places, 442 transitions, 5419 flow [2024-06-27 21:15:14,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5025, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5419, PETRI_PLACES=351, PETRI_TRANSITIONS=442} [2024-06-27 21:15:14,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-27 21:15:14,736 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 442 transitions, 5419 flow [2024-06-27 21:15:14,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:14,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:14,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:14,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:15:14,737 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:14,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:14,737 INFO L85 PathProgramCache]: Analyzing trace with hash 664324155, now seen corresponding path program 4 times [2024-06-27 21:15:14,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:14,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436886377] [2024-06-27 21:15:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:14,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:17,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436886377] [2024-06-27 21:15:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436886377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:17,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:17,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:17,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632143402] [2024-06-27 21:15:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:17,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:17,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:17,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:17,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 442 transitions, 5419 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:17,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:17,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:17,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:19,831 INFO L124 PetriNetUnfolderBase]: 2983/4902 cut-off events. [2024-06-27 21:15:19,831 INFO L125 PetriNetUnfolderBase]: For 449916/449920 co-relation queries the response was YES. [2024-06-27 21:15:19,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36267 conditions, 4902 events. 2983/4902 cut-off events. For 449916/449920 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 30494 event pairs, 597 based on Foata normal form. 4/4904 useless extension candidates. Maximal degree in co-relation 36115. Up to 4178 conditions per place. [2024-06-27 21:15:19,897 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 154 changer transitions 0/490 dead transitions. [2024-06-27 21:15:19,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 490 transitions, 7221 flow [2024-06-27 21:15:19,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:15:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:15:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-27 21:15:19,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:15:19,908 INFO L175 Difference]: Start difference. First operand has 351 places, 442 transitions, 5419 flow. Second operand 12 states and 201 transitions. [2024-06-27 21:15:19,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 490 transitions, 7221 flow [2024-06-27 21:15:21,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 490 transitions, 6973 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:15:21,353 INFO L231 Difference]: Finished difference. Result has 358 places, 451 transitions, 5695 flow [2024-06-27 21:15:21,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5171, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5695, PETRI_PLACES=358, PETRI_TRANSITIONS=451} [2024-06-27 21:15:21,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 21:15:21,353 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 451 transitions, 5695 flow [2024-06-27 21:15:21,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:21,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:21,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:21,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:15:21,354 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:21,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:21,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2070780443, now seen corresponding path program 8 times [2024-06-27 21:15:21,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:21,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205162326] [2024-06-27 21:15:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:21,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:25,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:25,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205162326] [2024-06-27 21:15:25,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205162326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:25,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:25,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283643207] [2024-06-27 21:15:25,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:25,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:25,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:25,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:25,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 451 transitions, 5695 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:25,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:25,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:25,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:27,185 INFO L124 PetriNetUnfolderBase]: 3001/4937 cut-off events. [2024-06-27 21:15:27,185 INFO L125 PetriNetUnfolderBase]: For 463515/463519 co-relation queries the response was YES. [2024-06-27 21:15:27,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37026 conditions, 4937 events. 3001/4937 cut-off events. For 463515/463519 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30821 event pairs, 617 based on Foata normal form. 3/4938 useless extension candidates. Maximal degree in co-relation 36873. Up to 4381 conditions per place. [2024-06-27 21:15:27,242 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 115 changer transitions 0/486 dead transitions. [2024-06-27 21:15:27,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 486 transitions, 7032 flow [2024-06-27 21:15:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:15:27,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:15:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:15:27,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:15:27,244 INFO L175 Difference]: Start difference. First operand has 358 places, 451 transitions, 5695 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:15:27,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 486 transitions, 7032 flow [2024-06-27 21:15:28,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 486 transitions, 6777 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-27 21:15:28,620 INFO L231 Difference]: Finished difference. Result has 362 places, 460 transitions, 5832 flow [2024-06-27 21:15:28,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5443, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5832, PETRI_PLACES=362, PETRI_TRANSITIONS=460} [2024-06-27 21:15:28,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-27 21:15:28,621 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 460 transitions, 5832 flow [2024-06-27 21:15:28,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:28,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:28,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:28,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:15:28,621 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:28,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1706415465, now seen corresponding path program 2 times [2024-06-27 21:15:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:28,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266346446] [2024-06-27 21:15:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:28,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:32,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:32,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266346446] [2024-06-27 21:15:32,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266346446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:32,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:32,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:32,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920562655] [2024-06-27 21:15:32,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:32,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:32,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:32,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:32,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:32,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:32,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 460 transitions, 5832 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:32,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:32,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:32,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:34,307 INFO L124 PetriNetUnfolderBase]: 3027/4974 cut-off events. [2024-06-27 21:15:34,307 INFO L125 PetriNetUnfolderBase]: For 483685/483693 co-relation queries the response was YES. [2024-06-27 21:15:34,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37494 conditions, 4974 events. 3027/4974 cut-off events. For 483685/483693 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30973 event pairs, 600 based on Foata normal form. 10/4982 useless extension candidates. Maximal degree in co-relation 37338. Up to 4500 conditions per place. [2024-06-27 21:15:34,366 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 88 changer transitions 0/503 dead transitions. [2024-06-27 21:15:34,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 503 transitions, 7164 flow [2024-06-27 21:15:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:15:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:15:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-27 21:15:34,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-27 21:15:34,368 INFO L175 Difference]: Start difference. First operand has 362 places, 460 transitions, 5832 flow. Second operand 13 states and 203 transitions. [2024-06-27 21:15:34,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 503 transitions, 7164 flow [2024-06-27 21:15:35,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 503 transitions, 6971 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:15:35,949 INFO L231 Difference]: Finished difference. Result has 371 places, 466 transitions, 5883 flow [2024-06-27 21:15:35,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5883, PETRI_PLACES=371, PETRI_TRANSITIONS=466} [2024-06-27 21:15:35,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-27 21:15:35,949 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 466 transitions, 5883 flow [2024-06-27 21:15:35,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:35,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:35,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:35,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:15:35,950 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:35,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2070774677, now seen corresponding path program 5 times [2024-06-27 21:15:35,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:35,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952982404] [2024-06-27 21:15:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:35,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:39,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:39,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952982404] [2024-06-27 21:15:39,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952982404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:39,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:39,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:39,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596402872] [2024-06-27 21:15:39,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:39,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:39,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:39,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:39,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:39,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:39,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 466 transitions, 5883 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:39,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:39,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:39,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:41,447 INFO L124 PetriNetUnfolderBase]: 3053/5011 cut-off events. [2024-06-27 21:15:41,448 INFO L125 PetriNetUnfolderBase]: For 497935/497939 co-relation queries the response was YES. [2024-06-27 21:15:41,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37595 conditions, 5011 events. 3053/5011 cut-off events. For 497935/497939 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31258 event pairs, 599 based on Foata normal form. 4/5013 useless extension candidates. Maximal degree in co-relation 37438. Up to 4261 conditions per place. [2024-06-27 21:15:41,507 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 157 changer transitions 0/506 dead transitions. [2024-06-27 21:15:41,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 506 transitions, 7593 flow [2024-06-27 21:15:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:15:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:15:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-27 21:15:41,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 21:15:41,509 INFO L175 Difference]: Start difference. First operand has 371 places, 466 transitions, 5883 flow. Second operand 11 states and 186 transitions. [2024-06-27 21:15:41,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 506 transitions, 7593 flow [2024-06-27 21:15:43,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 506 transitions, 7471 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 21:15:43,054 INFO L231 Difference]: Finished difference. Result has 373 places, 472 transitions, 6157 flow [2024-06-27 21:15:43,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5761, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6157, PETRI_PLACES=373, PETRI_TRANSITIONS=472} [2024-06-27 21:15:43,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-27 21:15:43,055 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 472 transitions, 6157 flow [2024-06-27 21:15:43,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:43,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:43,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:43,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:15:43,055 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:43,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:43,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2070780071, now seen corresponding path program 3 times [2024-06-27 21:15:43,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:43,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398565048] [2024-06-27 21:15:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:43,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:46,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:46,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398565048] [2024-06-27 21:15:46,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398565048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:46,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:46,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:46,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445990869] [2024-06-27 21:15:46,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:46,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:46,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:46,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:46,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:46,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:46,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 472 transitions, 6157 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:46,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:46,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:46,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:48,164 INFO L124 PetriNetUnfolderBase]: 3047/5004 cut-off events. [2024-06-27 21:15:48,164 INFO L125 PetriNetUnfolderBase]: For 500622/500630 co-relation queries the response was YES. [2024-06-27 21:15:48,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37893 conditions, 5004 events. 3047/5004 cut-off events. For 500622/500630 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31243 event pairs, 600 based on Foata normal form. 10/5012 useless extension candidates. Maximal degree in co-relation 37734. Up to 4531 conditions per place. [2024-06-27 21:15:48,233 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 88 changer transitions 0/507 dead transitions. [2024-06-27 21:15:48,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 507 transitions, 7257 flow [2024-06-27 21:15:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:15:48,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:15:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-27 21:15:48,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-27 21:15:48,235 INFO L175 Difference]: Start difference. First operand has 373 places, 472 transitions, 6157 flow. Second operand 12 states and 191 transitions. [2024-06-27 21:15:48,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 507 transitions, 7257 flow [2024-06-27 21:15:50,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 507 transitions, 6954 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 21:15:50,096 INFO L231 Difference]: Finished difference. Result has 378 places, 472 transitions, 6036 flow [2024-06-27 21:15:50,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5854, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6036, PETRI_PLACES=378, PETRI_TRANSITIONS=472} [2024-06-27 21:15:50,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-27 21:15:50,097 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 472 transitions, 6036 flow [2024-06-27 21:15:50,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:50,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:50,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:50,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:15:50,098 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:50,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1706426997, now seen corresponding path program 9 times [2024-06-27 21:15:50,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:50,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929025198] [2024-06-27 21:15:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:50,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:15:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:15:53,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:15:53,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929025198] [2024-06-27 21:15:53,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929025198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:15:53,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:15:53,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:15:53,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250188809] [2024-06-27 21:15:53,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:15:53,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:15:53,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:15:53,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:15:53,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:15:53,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:15:53,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 472 transitions, 6036 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:53,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:15:53,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:15:53,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:15:55,856 INFO L124 PetriNetUnfolderBase]: 3044/5005 cut-off events. [2024-06-27 21:15:55,856 INFO L125 PetriNetUnfolderBase]: For 500706/500710 co-relation queries the response was YES. [2024-06-27 21:15:55,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37641 conditions, 5005 events. 3044/5005 cut-off events. For 500706/500710 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31236 event pairs, 622 based on Foata normal form. 3/5006 useless extension candidates. Maximal degree in co-relation 37481. Up to 4442 conditions per place. [2024-06-27 21:15:55,939 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 116 changer transitions 0/499 dead transitions. [2024-06-27 21:15:55,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 499 transitions, 7096 flow [2024-06-27 21:15:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:15:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:15:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-27 21:15:55,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:15:55,941 INFO L175 Difference]: Start difference. First operand has 378 places, 472 transitions, 6036 flow. Second operand 11 states and 176 transitions. [2024-06-27 21:15:55,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 499 transitions, 7096 flow [2024-06-27 21:15:57,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 499 transitions, 6894 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-27 21:15:57,821 INFO L231 Difference]: Finished difference. Result has 378 places, 472 transitions, 6072 flow [2024-06-27 21:15:57,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5834, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6072, PETRI_PLACES=378, PETRI_TRANSITIONS=472} [2024-06-27 21:15:57,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-27 21:15:57,822 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 472 transitions, 6072 flow [2024-06-27 21:15:57,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:15:57,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:15:57,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:15:57,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:15:57,822 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:15:57,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:15:57,823 INFO L85 PathProgramCache]: Analyzing trace with hash 673578585, now seen corresponding path program 6 times [2024-06-27 21:15:57,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:15:57,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335912288] [2024-06-27 21:15:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:15:57,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:15:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:01,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:01,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335912288] [2024-06-27 21:16:01,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335912288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:01,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:01,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:01,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702315253] [2024-06-27 21:16:01,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:01,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:01,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:01,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:01,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:01,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:01,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 472 transitions, 6072 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:01,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:01,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:01,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:02,925 INFO L124 PetriNetUnfolderBase]: 3038/4993 cut-off events. [2024-06-27 21:16:02,925 INFO L125 PetriNetUnfolderBase]: For 506810/506814 co-relation queries the response was YES. [2024-06-27 21:16:02,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37543 conditions, 4993 events. 3038/4993 cut-off events. For 506810/506814 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31194 event pairs, 597 based on Foata normal form. 4/4995 useless extension candidates. Maximal degree in co-relation 37382. Up to 4244 conditions per place. [2024-06-27 21:16:02,995 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 158 changer transitions 0/508 dead transitions. [2024-06-27 21:16:02,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 508 transitions, 7544 flow [2024-06-27 21:16:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:16:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:16:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-06-27 21:16:02,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-27 21:16:02,996 INFO L175 Difference]: Start difference. First operand has 378 places, 472 transitions, 6072 flow. Second operand 13 states and 210 transitions. [2024-06-27 21:16:02,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 508 transitions, 7544 flow [2024-06-27 21:16:04,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 508 transitions, 7254 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 21:16:04,978 INFO L231 Difference]: Finished difference. Result has 381 places, 472 transitions, 6104 flow [2024-06-27 21:16:04,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5782, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6104, PETRI_PLACES=381, PETRI_TRANSITIONS=472} [2024-06-27 21:16:04,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 21:16:04,980 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 472 transitions, 6104 flow [2024-06-27 21:16:04,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:04,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:04,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:04,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:16:04,981 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:04,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash -502954177, now seen corresponding path program 7 times [2024-06-27 21:16:04,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:04,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977636296] [2024-06-27 21:16:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:04,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:08,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:08,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977636296] [2024-06-27 21:16:08,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977636296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:08,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:08,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:08,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978381005] [2024-06-27 21:16:08,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:08,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:08,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:08,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:08,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:08,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:08,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 472 transitions, 6104 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:08,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:08,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:08,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:10,396 INFO L124 PetriNetUnfolderBase]: 3127/5133 cut-off events. [2024-06-27 21:16:10,396 INFO L125 PetriNetUnfolderBase]: For 554928/554932 co-relation queries the response was YES. [2024-06-27 21:16:10,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39456 conditions, 5133 events. 3127/5133 cut-off events. For 554928/554932 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 32201 event pairs, 614 based on Foata normal form. 4/5135 useless extension candidates. Maximal degree in co-relation 39294. Up to 4326 conditions per place. [2024-06-27 21:16:10,460 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 351 selfloop transitions, 169 changer transitions 0/525 dead transitions. [2024-06-27 21:16:10,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 525 transitions, 8172 flow [2024-06-27 21:16:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:16:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:16:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:16:10,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:16:10,462 INFO L175 Difference]: Start difference. First operand has 381 places, 472 transitions, 6104 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:16:10,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 525 transitions, 8172 flow [2024-06-27 21:16:12,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 525 transitions, 7795 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 21:16:12,496 INFO L231 Difference]: Finished difference. Result has 379 places, 496 transitions, 6457 flow [2024-06-27 21:16:12,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5775, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6457, PETRI_PLACES=379, PETRI_TRANSITIONS=496} [2024-06-27 21:16:12,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-27 21:16:12,496 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 496 transitions, 6457 flow [2024-06-27 21:16:12,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:12,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:12,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:12,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:16:12,497 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:12,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1869699569, now seen corresponding path program 8 times [2024-06-27 21:16:12,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:12,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528661812] [2024-06-27 21:16:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:12,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:16,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:16,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528661812] [2024-06-27 21:16:16,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528661812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:16,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:16,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:16,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014504934] [2024-06-27 21:16:16,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:16,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:16,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:16,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:16,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:16,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:16,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 496 transitions, 6457 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:16,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:16,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:16,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:17,728 INFO L124 PetriNetUnfolderBase]: 3137/5143 cut-off events. [2024-06-27 21:16:17,728 INFO L125 PetriNetUnfolderBase]: For 565683/565687 co-relation queries the response was YES. [2024-06-27 21:16:17,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39619 conditions, 5143 events. 3137/5143 cut-off events. For 565683/565687 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32201 event pairs, 610 based on Foata normal form. 4/5145 useless extension candidates. Maximal degree in co-relation 39456. Up to 4336 conditions per place. [2024-06-27 21:16:17,801 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 348 selfloop transitions, 179 changer transitions 0/532 dead transitions. [2024-06-27 21:16:17,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 532 transitions, 8406 flow [2024-06-27 21:16:17,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:16:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:16:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 198 transitions. [2024-06-27 21:16:17,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:16:17,803 INFO L175 Difference]: Start difference. First operand has 379 places, 496 transitions, 6457 flow. Second operand 12 states and 198 transitions. [2024-06-27 21:16:17,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 532 transitions, 8406 flow [2024-06-27 21:16:20,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 532 transitions, 8223 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 21:16:20,099 INFO L231 Difference]: Finished difference. Result has 388 places, 499 transitions, 6685 flow [2024-06-27 21:16:20,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6277, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6685, PETRI_PLACES=388, PETRI_TRANSITIONS=499} [2024-06-27 21:16:20,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-27 21:16:20,100 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 499 transitions, 6685 flow [2024-06-27 21:16:20,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:20,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:20,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:20,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:16:20,100 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:20,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:20,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1869688223, now seen corresponding path program 10 times [2024-06-27 21:16:20,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:20,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277366569] [2024-06-27 21:16:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:20,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:23,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:23,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277366569] [2024-06-27 21:16:23,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277366569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:23,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:23,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:23,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946993697] [2024-06-27 21:16:23,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:23,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:23,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:23,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:23,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:23,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:23,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 499 transitions, 6685 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:23,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:23,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:23,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:25,283 INFO L124 PetriNetUnfolderBase]: 3166/5195 cut-off events. [2024-06-27 21:16:25,283 INFO L125 PetriNetUnfolderBase]: For 588545/588549 co-relation queries the response was YES. [2024-06-27 21:16:25,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40473 conditions, 5195 events. 3166/5195 cut-off events. For 588545/588549 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 32628 event pairs, 631 based on Foata normal form. 3/5196 useless extension candidates. Maximal degree in co-relation 40309. Up to 4578 conditions per place. [2024-06-27 21:16:25,358 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 392 selfloop transitions, 141 changer transitions 0/538 dead transitions. [2024-06-27 21:16:25,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 538 transitions, 8638 flow [2024-06-27 21:16:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:16:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:16:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-27 21:16:25,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 21:16:25,359 INFO L175 Difference]: Start difference. First operand has 388 places, 499 transitions, 6685 flow. Second operand 12 states and 188 transitions. [2024-06-27 21:16:25,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 538 transitions, 8638 flow [2024-06-27 21:16:27,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 538 transitions, 8270 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 21:16:27,639 INFO L231 Difference]: Finished difference. Result has 395 places, 511 transitions, 6910 flow [2024-06-27 21:16:27,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6317, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6910, PETRI_PLACES=395, PETRI_TRANSITIONS=511} [2024-06-27 21:16:27,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 21:16:27,640 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 511 transitions, 6910 flow [2024-06-27 21:16:27,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:27,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:27,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:27,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:16:27,641 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:27,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash 817682271, now seen corresponding path program 4 times [2024-06-27 21:16:27,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:27,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98179137] [2024-06-27 21:16:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:27,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:31,129 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 21:16:31,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:31,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98179137] [2024-06-27 21:16:31,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98179137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:31,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:31,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:31,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649278473] [2024-06-27 21:16:31,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:31,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:31,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:31,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:31,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:31,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:31,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 511 transitions, 6910 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:31,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:31,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:31,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:33,296 INFO L124 PetriNetUnfolderBase]: 3208/5255 cut-off events. [2024-06-27 21:16:33,297 INFO L125 PetriNetUnfolderBase]: For 623160/623168 co-relation queries the response was YES. [2024-06-27 21:16:33,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41185 conditions, 5255 events. 3208/5255 cut-off events. For 623160/623168 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33055 event pairs, 604 based on Foata normal form. 10/5263 useless extension candidates. Maximal degree in co-relation 41017. Up to 4714 conditions per place. [2024-06-27 21:16:33,375 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 448 selfloop transitions, 99 changer transitions 0/552 dead transitions. [2024-06-27 21:16:33,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 552 transitions, 8390 flow [2024-06-27 21:16:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:16:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:16:33,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-27 21:16:33,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 21:16:33,376 INFO L175 Difference]: Start difference. First operand has 395 places, 511 transitions, 6910 flow. Second operand 12 states and 188 transitions. [2024-06-27 21:16:33,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 552 transitions, 8390 flow [2024-06-27 21:16:35,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 552 transitions, 8090 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:35,807 INFO L231 Difference]: Finished difference. Result has 402 places, 520 transitions, 6948 flow [2024-06-27 21:16:35,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6610, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6948, PETRI_PLACES=402, PETRI_TRANSITIONS=520} [2024-06-27 21:16:35,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-27 21:16:35,808 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 520 transitions, 6948 flow [2024-06-27 21:16:35,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:35,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:35,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:35,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:16:35,808 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:35,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:35,809 INFO L85 PathProgramCache]: Analyzing trace with hash -503074147, now seen corresponding path program 9 times [2024-06-27 21:16:35,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:35,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530700926] [2024-06-27 21:16:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:35,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:39,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:39,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530700926] [2024-06-27 21:16:39,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530700926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:39,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:39,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:39,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963320072] [2024-06-27 21:16:39,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:39,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:39,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:39,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:39,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:39,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:39,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 520 transitions, 6948 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:39,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:39,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:39,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:41,367 INFO L124 PetriNetUnfolderBase]: 3228/5287 cut-off events. [2024-06-27 21:16:41,367 INFO L125 PetriNetUnfolderBase]: For 634840/634842 co-relation queries the response was YES. [2024-06-27 21:16:41,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41488 conditions, 5287 events. 3228/5287 cut-off events. For 634840/634842 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33233 event pairs, 608 based on Foata normal form. 2/5287 useless extension candidates. Maximal degree in co-relation 41318. Up to 4813 conditions per place. [2024-06-27 21:16:41,441 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 486 selfloop transitions, 61 changer transitions 0/552 dead transitions. [2024-06-27 21:16:41,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 552 transitions, 8207 flow [2024-06-27 21:16:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:16:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:16:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:16:41,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 21:16:41,442 INFO L175 Difference]: Start difference. First operand has 402 places, 520 transitions, 6948 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:16:41,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 552 transitions, 8207 flow [2024-06-27 21:16:43,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 552 transitions, 8065 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:16:43,830 INFO L231 Difference]: Finished difference. Result has 404 places, 526 transitions, 7039 flow [2024-06-27 21:16:43,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7039, PETRI_PLACES=404, PETRI_TRANSITIONS=526} [2024-06-27 21:16:43,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-27 21:16:43,831 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 526 transitions, 7039 flow [2024-06-27 21:16:43,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:43,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:43,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:43,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:16:43,836 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:43,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:43,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1866206489, now seen corresponding path program 10 times [2024-06-27 21:16:43,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:43,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944344726] [2024-06-27 21:16:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:43,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:47,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:47,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944344726] [2024-06-27 21:16:47,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944344726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:47,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:47,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:47,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781795198] [2024-06-27 21:16:47,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:47,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:47,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:47,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:47,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:47,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:47,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 526 transitions, 7039 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:47,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:47,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:47,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:49,705 INFO L124 PetriNetUnfolderBase]: 3222/5275 cut-off events. [2024-06-27 21:16:49,705 INFO L125 PetriNetUnfolderBase]: For 636846/636848 co-relation queries the response was YES. [2024-06-27 21:16:49,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41451 conditions, 5275 events. 3222/5275 cut-off events. For 636846/636848 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33168 event pairs, 605 based on Foata normal form. 2/5275 useless extension candidates. Maximal degree in co-relation 41279. Up to 4780 conditions per place. [2024-06-27 21:16:49,792 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 480 selfloop transitions, 75 changer transitions 0/560 dead transitions. [2024-06-27 21:16:49,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 560 transitions, 8431 flow [2024-06-27 21:16:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 21:16:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 21:16:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 214 transitions. [2024-06-27 21:16:49,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-27 21:16:49,794 INFO L175 Difference]: Start difference. First operand has 404 places, 526 transitions, 7039 flow. Second operand 14 states and 214 transitions. [2024-06-27 21:16:49,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 560 transitions, 8431 flow [2024-06-27 21:16:52,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 560 transitions, 8281 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:16:52,622 INFO L231 Difference]: Finished difference. Result has 412 places, 526 transitions, 7045 flow [2024-06-27 21:16:52,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6889, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7045, PETRI_PLACES=412, PETRI_TRANSITIONS=526} [2024-06-27 21:16:52,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-27 21:16:52,623 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 526 transitions, 7045 flow [2024-06-27 21:16:52,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:52,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:16:52,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:16:52,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:16:52,623 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:16:52,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:16:52,624 INFO L85 PathProgramCache]: Analyzing trace with hash -874676013, now seen corresponding path program 11 times [2024-06-27 21:16:52,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:16:52,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633691312] [2024-06-27 21:16:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:16:52,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:16:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:16:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:16:56,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:16:56,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633691312] [2024-06-27 21:16:56,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633691312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:16:56,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:16:56,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:16:56,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154341470] [2024-06-27 21:16:56,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:16:56,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:16:56,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:16:56,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:16:56,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:16:56,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:16:56,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 526 transitions, 7045 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:16:56,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:16:56,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:16:56,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:16:58,099 INFO L124 PetriNetUnfolderBase]: 3216/5263 cut-off events. [2024-06-27 21:16:58,100 INFO L125 PetriNetUnfolderBase]: For 638958/638962 co-relation queries the response was YES. [2024-06-27 21:16:58,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41295 conditions, 5263 events. 3216/5263 cut-off events. For 638958/638962 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 33029 event pairs, 611 based on Foata normal form. 4/5265 useless extension candidates. Maximal degree in co-relation 41122. Up to 4440 conditions per place. [2024-06-27 21:16:58,178 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 187 changer transitions 0/559 dead transitions. [2024-06-27 21:16:58,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 559 transitions, 8839 flow [2024-06-27 21:16:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:16:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:16:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-27 21:16:58,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:16:58,182 INFO L175 Difference]: Start difference. First operand has 412 places, 526 transitions, 7045 flow. Second operand 13 states and 208 transitions. [2024-06-27 21:16:58,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 559 transitions, 8839 flow [2024-06-27 21:17:00,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 559 transitions, 8668 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 21:17:00,946 INFO L231 Difference]: Finished difference. Result has 413 places, 526 transitions, 7254 flow [2024-06-27 21:17:00,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6874, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7254, PETRI_PLACES=413, PETRI_TRANSITIONS=526} [2024-06-27 21:17:00,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-27 21:17:00,946 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 526 transitions, 7254 flow [2024-06-27 21:17:00,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:00,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:00,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:00,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:17:00,947 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:00,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:00,948 INFO L85 PathProgramCache]: Analyzing trace with hash -878395269, now seen corresponding path program 11 times [2024-06-27 21:17:00,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:00,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159818625] [2024-06-27 21:17:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:00,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:04,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:04,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159818625] [2024-06-27 21:17:04,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159818625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:04,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:04,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:04,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678627194] [2024-06-27 21:17:04,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:04,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:04,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:04,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:04,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:04,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:04,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 526 transitions, 7254 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:04,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:04,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:04,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:06,470 INFO L124 PetriNetUnfolderBase]: 3213/5263 cut-off events. [2024-06-27 21:17:06,471 INFO L125 PetriNetUnfolderBase]: For 640271/640273 co-relation queries the response was YES. [2024-06-27 21:17:06,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41595 conditions, 5263 events. 3213/5263 cut-off events. For 640271/640273 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 33091 event pairs, 622 based on Foata normal form. 1/5262 useless extension candidates. Maximal degree in co-relation 41421. Up to 4840 conditions per place. [2024-06-27 21:17:06,547 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 490 selfloop transitions, 52 changer transitions 0/547 dead transitions. [2024-06-27 21:17:06,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 547 transitions, 8394 flow [2024-06-27 21:17:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 21:17:06,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-27 21:17:06,548 INFO L175 Difference]: Start difference. First operand has 413 places, 526 transitions, 7254 flow. Second operand 9 states and 143 transitions. [2024-06-27 21:17:06,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 547 transitions, 8394 flow [2024-06-27 21:17:08,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 547 transitions, 7976 flow, removed 29 selfloop flow, removed 11 redundant places. [2024-06-27 21:17:08,854 INFO L231 Difference]: Finished difference. Result has 411 places, 526 transitions, 6947 flow [2024-06-27 21:17:08,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6836, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6947, PETRI_PLACES=411, PETRI_TRANSITIONS=526} [2024-06-27 21:17:08,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-27 21:17:08,854 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 526 transitions, 6947 flow [2024-06-27 21:17:08,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:08,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:08,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:08,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:17:08,855 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:08,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash -510305641, now seen corresponding path program 5 times [2024-06-27 21:17:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:08,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899438025] [2024-06-27 21:17:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:12,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:12,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899438025] [2024-06-27 21:17:12,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899438025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:12,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:12,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:12,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057543609] [2024-06-27 21:17:12,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:12,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:12,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:12,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:12,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:12,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:12,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 526 transitions, 6947 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:12,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:12,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:12,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:14,754 INFO L124 PetriNetUnfolderBase]: 3223/5273 cut-off events. [2024-06-27 21:17:14,754 INFO L125 PetriNetUnfolderBase]: For 656662/656670 co-relation queries the response was YES. [2024-06-27 21:17:14,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41313 conditions, 5273 events. 3223/5273 cut-off events. For 656662/656670 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33118 event pairs, 605 based on Foata normal form. 10/5281 useless extension candidates. Maximal degree in co-relation 41138. Up to 4732 conditions per place. [2024-06-27 21:17:14,831 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 461 selfloop transitions, 102 changer transitions 0/568 dead transitions. [2024-06-27 21:17:14,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 568 transitions, 8628 flow [2024-06-27 21:17:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 21:17:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 21:17:14,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 230 transitions. [2024-06-27 21:17:14,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 21:17:14,833 INFO L175 Difference]: Start difference. First operand has 411 places, 526 transitions, 6947 flow. Second operand 15 states and 230 transitions. [2024-06-27 21:17:14,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 568 transitions, 8628 flow [2024-06-27 21:17:17,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 568 transitions, 8483 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 21:17:17,826 INFO L231 Difference]: Finished difference. Result has 417 places, 529 transitions, 7055 flow [2024-06-27 21:17:17,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6802, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7055, PETRI_PLACES=417, PETRI_TRANSITIONS=529} [2024-06-27 21:17:17,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-27 21:17:17,827 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 529 transitions, 7055 flow [2024-06-27 21:17:17,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:17,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:17,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:17,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:17:17,827 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:17,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash -510311221, now seen corresponding path program 6 times [2024-06-27 21:17:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:17,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416876556] [2024-06-27 21:17:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:17,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:21,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:21,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416876556] [2024-06-27 21:17:21,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416876556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:21,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:21,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:21,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044710540] [2024-06-27 21:17:21,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:21,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:21,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:21,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:21,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:21,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 529 transitions, 7055 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:21,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:21,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:21,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:24,202 INFO L124 PetriNetUnfolderBase]: 3217/5267 cut-off events. [2024-06-27 21:17:24,203 INFO L125 PetriNetUnfolderBase]: For 657831/657839 co-relation queries the response was YES. [2024-06-27 21:17:24,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41309 conditions, 5267 events. 3217/5267 cut-off events. For 657831/657839 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33146 event pairs, 606 based on Foata normal form. 10/5275 useless extension candidates. Maximal degree in co-relation 41133. Up to 4727 conditions per place. [2024-06-27 21:17:24,273 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 456 selfloop transitions, 102 changer transitions 0/563 dead transitions. [2024-06-27 21:17:24,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 563 transitions, 8469 flow [2024-06-27 21:17:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:17:24,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:17:24,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-27 21:17:24,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-27 21:17:24,275 INFO L175 Difference]: Start difference. First operand has 417 places, 529 transitions, 7055 flow. Second operand 13 states and 203 transitions. [2024-06-27 21:17:24,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 563 transitions, 8469 flow [2024-06-27 21:17:27,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 563 transitions, 8184 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-06-27 21:17:27,246 INFO L231 Difference]: Finished difference. Result has 418 places, 529 transitions, 6980 flow [2024-06-27 21:17:27,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6770, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6980, PETRI_PLACES=418, PETRI_TRANSITIONS=529} [2024-06-27 21:17:27,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-27 21:17:27,247 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 529 transitions, 6980 flow [2024-06-27 21:17:27,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:27,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:27,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:27,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:17:27,254 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:27,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:27,255 INFO L85 PathProgramCache]: Analyzing trace with hash -514036057, now seen corresponding path program 12 times [2024-06-27 21:17:27,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:27,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012286573] [2024-06-27 21:17:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:27,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:30,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:30,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012286573] [2024-06-27 21:17:30,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012286573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:30,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:30,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:30,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048105674] [2024-06-27 21:17:30,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:30,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:30,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:30,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:30,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:30,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 529 transitions, 6980 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:30,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:30,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:30,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:33,108 INFO L124 PetriNetUnfolderBase]: 3211/5265 cut-off events. [2024-06-27 21:17:33,108 INFO L125 PetriNetUnfolderBase]: For 658456/658458 co-relation queries the response was YES. [2024-06-27 21:17:33,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40921 conditions, 5265 events. 3211/5265 cut-off events. For 658456/658458 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33168 event pairs, 604 based on Foata normal form. 2/5265 useless extension candidates. Maximal degree in co-relation 40745. Up to 4769 conditions per place. [2024-06-27 21:17:33,193 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 75 changer transitions 0/558 dead transitions. [2024-06-27 21:17:33,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 558 transitions, 8158 flow [2024-06-27 21:17:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:17:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:17:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-27 21:17:33,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37103174603174605 [2024-06-27 21:17:33,197 INFO L175 Difference]: Start difference. First operand has 418 places, 529 transitions, 6980 flow. Second operand 12 states and 187 transitions. [2024-06-27 21:17:33,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 558 transitions, 8158 flow [2024-06-27 21:17:36,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 558 transitions, 7928 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-27 21:17:36,105 INFO L231 Difference]: Finished difference. Result has 418 places, 529 transitions, 6907 flow [2024-06-27 21:17:36,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6750, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6907, PETRI_PLACES=418, PETRI_TRANSITIONS=529} [2024-06-27 21:17:36,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-27 21:17:36,109 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 529 transitions, 6907 flow [2024-06-27 21:17:36,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:36,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:36,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:36,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:17:36,110 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:36,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:36,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1562530887, now seen corresponding path program 12 times [2024-06-27 21:17:36,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:36,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542852183] [2024-06-27 21:17:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:36,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:40,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:40,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542852183] [2024-06-27 21:17:40,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542852183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:40,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:40,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:40,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765541614] [2024-06-27 21:17:40,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:40,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:40,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:40,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:40,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:40,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:40,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 529 transitions, 6907 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:40,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:40,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:40,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:42,104 INFO L124 PetriNetUnfolderBase]: 3208/5267 cut-off events. [2024-06-27 21:17:42,104 INFO L125 PetriNetUnfolderBase]: For 658947/658951 co-relation queries the response was YES. [2024-06-27 21:17:42,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40787 conditions, 5267 events. 3208/5267 cut-off events. For 658947/658951 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33272 event pairs, 635 based on Foata normal form. 3/5268 useless extension candidates. Maximal degree in co-relation 40610. Up to 4640 conditions per place. [2024-06-27 21:17:42,178 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 407 selfloop transitions, 140 changer transitions 0/552 dead transitions. [2024-06-27 21:17:42,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 552 transitions, 8273 flow [2024-06-27 21:17:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:17:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:17:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 21:17:42,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 21:17:42,180 INFO L175 Difference]: Start difference. First operand has 418 places, 529 transitions, 6907 flow. Second operand 10 states and 162 transitions. [2024-06-27 21:17:42,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 552 transitions, 8273 flow [2024-06-27 21:17:45,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 552 transitions, 8091 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-27 21:17:45,246 INFO L231 Difference]: Finished difference. Result has 417 places, 529 transitions, 7011 flow [2024-06-27 21:17:45,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7011, PETRI_PLACES=417, PETRI_TRANSITIONS=529} [2024-06-27 21:17:45,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-27 21:17:45,247 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 529 transitions, 7011 flow [2024-06-27 21:17:45,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:45,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:45,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:45,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:17:45,247 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:45,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash 104355321, now seen corresponding path program 4 times [2024-06-27 21:17:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:45,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781045705] [2024-06-27 21:17:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:45,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:48,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:48,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781045705] [2024-06-27 21:17:48,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781045705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:48,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:48,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:48,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483196997] [2024-06-27 21:17:48,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:48,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:48,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:48,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:48,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:48,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:48,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 529 transitions, 7011 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:48,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:48,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:48,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:50,499 INFO L124 PetriNetUnfolderBase]: 3190/5242 cut-off events. [2024-06-27 21:17:50,499 INFO L125 PetriNetUnfolderBase]: For 664450/664456 co-relation queries the response was YES. [2024-06-27 21:17:50,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39967 conditions, 5242 events. 3190/5242 cut-off events. For 664450/664456 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32995 event pairs, 471 based on Foata normal form. 14/5254 useless extension candidates. Maximal degree in co-relation 39789. Up to 4423 conditions per place. [2024-06-27 21:17:50,570 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 492 selfloop transitions, 78 changer transitions 0/575 dead transitions. [2024-06-27 21:17:50,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 575 transitions, 8331 flow [2024-06-27 21:17:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:17:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:17:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:17:50,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:17:50,572 INFO L175 Difference]: Start difference. First operand has 417 places, 529 transitions, 7011 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:17:50,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 575 transitions, 8331 flow [2024-06-27 21:17:53,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 575 transitions, 8045 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 21:17:53,517 INFO L231 Difference]: Finished difference. Result has 418 places, 529 transitions, 6891 flow [2024-06-27 21:17:53,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6891, PETRI_PLACES=418, PETRI_TRANSITIONS=529} [2024-06-27 21:17:53,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-27 21:17:53,517 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 529 transitions, 6891 flow [2024-06-27 21:17:53,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:53,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:17:53,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:17:53,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:17:53,518 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:17:53,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:17:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1411406439, now seen corresponding path program 13 times [2024-06-27 21:17:53,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:17:53,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053630593] [2024-06-27 21:17:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:17:53,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:17:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:17:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:17:56,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:17:56,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053630593] [2024-06-27 21:17:56,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053630593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:17:56,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:17:56,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:17:56,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812404371] [2024-06-27 21:17:56,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:17:56,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:17:56,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:17:56,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:17:56,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:17:56,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:17:56,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 529 transitions, 6891 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:17:56,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:17:56,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:17:56,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:17:58,806 INFO L124 PetriNetUnfolderBase]: 3203/5258 cut-off events. [2024-06-27 21:17:58,806 INFO L125 PetriNetUnfolderBase]: For 643014/643022 co-relation queries the response was YES. [2024-06-27 21:17:58,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40407 conditions, 5258 events. 3203/5258 cut-off events. For 643014/643022 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33195 event pairs, 637 based on Foata normal form. 2/5253 useless extension candidates. Maximal degree in co-relation 40228. Up to 4429 conditions per place. [2024-06-27 21:17:58,890 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 216 changer transitions 0/567 dead transitions. [2024-06-27 21:17:58,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 567 transitions, 8685 flow [2024-06-27 21:17:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:17:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:17:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:17:58,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 21:17:58,892 INFO L175 Difference]: Start difference. First operand has 418 places, 529 transitions, 6891 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:17:58,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 567 transitions, 8685 flow [2024-06-27 21:18:01,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 567 transitions, 8495 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 21:18:01,899 INFO L231 Difference]: Finished difference. Result has 418 places, 535 transitions, 7301 flow [2024-06-27 21:18:01,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6713, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7301, PETRI_PLACES=418, PETRI_TRANSITIONS=535} [2024-06-27 21:18:01,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-27 21:18:01,911 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 535 transitions, 7301 flow [2024-06-27 21:18:01,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:01,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:01,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:01,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:18:01,911 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:01,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2119578755, now seen corresponding path program 14 times [2024-06-27 21:18:01,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:01,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112514316] [2024-06-27 21:18:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:01,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:04,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:04,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112514316] [2024-06-27 21:18:04,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112514316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:04,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:04,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:04,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77505661] [2024-06-27 21:18:04,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:04,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:04,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:04,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:04,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:04,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:04,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 535 transitions, 7301 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:04,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:04,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:04,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:07,109 INFO L124 PetriNetUnfolderBase]: 3208/5255 cut-off events. [2024-06-27 21:18:07,109 INFO L125 PetriNetUnfolderBase]: For 622446/622454 co-relation queries the response was YES. [2024-06-27 21:18:07,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40244 conditions, 5255 events. 3208/5255 cut-off events. For 622446/622454 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 33024 event pairs, 631 based on Foata normal form. 2/5250 useless extension candidates. Maximal degree in co-relation 40066. Up to 4435 conditions per place. [2024-06-27 21:18:07,193 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 216 changer transitions 0/566 dead transitions. [2024-06-27 21:18:07,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 566 transitions, 9004 flow [2024-06-27 21:18:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:18:07,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 21:18:07,195 INFO L175 Difference]: Start difference. First operand has 418 places, 535 transitions, 7301 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:18:07,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 566 transitions, 9004 flow [2024-06-27 21:18:10,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 566 transitions, 8564 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-27 21:18:10,082 INFO L231 Difference]: Finished difference. Result has 422 places, 538 transitions, 7384 flow [2024-06-27 21:18:10,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6898, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7384, PETRI_PLACES=422, PETRI_TRANSITIONS=538} [2024-06-27 21:18:10,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-27 21:18:10,082 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 538 transitions, 7384 flow [2024-06-27 21:18:10,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:10,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:10,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:10,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:18:10,083 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:10,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:10,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2119579127, now seen corresponding path program 7 times [2024-06-27 21:18:10,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:10,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343772373] [2024-06-27 21:18:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:10,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:13,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:13,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343772373] [2024-06-27 21:18:13,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343772373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:13,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:13,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:13,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877537139] [2024-06-27 21:18:13,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:13,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:13,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:13,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:13,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 538 transitions, 7384 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:13,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:13,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:13,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:15,653 INFO L124 PetriNetUnfolderBase]: 3234/5305 cut-off events. [2024-06-27 21:18:15,654 INFO L125 PetriNetUnfolderBase]: For 639241/639260 co-relation queries the response was YES. [2024-06-27 21:18:15,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40631 conditions, 5305 events. 3234/5305 cut-off events. For 639241/639260 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 33513 event pairs, 618 based on Foata normal form. 16/5317 useless extension candidates. Maximal degree in co-relation 40452. Up to 4766 conditions per place. [2024-06-27 21:18:15,734 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 466 selfloop transitions, 105 changer transitions 0/576 dead transitions. [2024-06-27 21:18:15,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 576 transitions, 8914 flow [2024-06-27 21:18:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:18:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:18:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 21:18:15,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:18:15,736 INFO L175 Difference]: Start difference. First operand has 422 places, 538 transitions, 7384 flow. Second operand 10 states and 165 transitions. [2024-06-27 21:18:15,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 576 transitions, 8914 flow [2024-06-27 21:18:18,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 576 transitions, 8474 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:18:18,519 INFO L231 Difference]: Finished difference. Result has 426 places, 544 transitions, 7250 flow [2024-06-27 21:18:18,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6944, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7250, PETRI_PLACES=426, PETRI_TRANSITIONS=544} [2024-06-27 21:18:18,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-27 21:18:18,520 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 544 transitions, 7250 flow [2024-06-27 21:18:18,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:18,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:18,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:18,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:18:18,520 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:18,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash -539962583, now seen corresponding path program 15 times [2024-06-27 21:18:18,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:18,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482375777] [2024-06-27 21:18:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:18,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:21,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:21,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482375777] [2024-06-27 21:18:21,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482375777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:21,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:21,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:21,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308601348] [2024-06-27 21:18:21,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:21,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:21,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:21,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:21,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:21,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:21,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 544 transitions, 7250 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:21,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:21,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:21,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:23,286 INFO L124 PetriNetUnfolderBase]: 3247/5321 cut-off events. [2024-06-27 21:18:23,286 INFO L125 PetriNetUnfolderBase]: For 649453/649461 co-relation queries the response was YES. [2024-06-27 21:18:23,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40698 conditions, 5321 events. 3247/5321 cut-off events. For 649453/649461 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 33539 event pairs, 638 based on Foata normal form. 2/5316 useless extension candidates. Maximal degree in co-relation 40518. Up to 4486 conditions per place. [2024-06-27 21:18:23,366 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 342 selfloop transitions, 227 changer transitions 0/574 dead transitions. [2024-06-27 21:18:23,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 574 transitions, 8997 flow [2024-06-27 21:18:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:18:23,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 21:18:23,368 INFO L175 Difference]: Start difference. First operand has 426 places, 544 transitions, 7250 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:18:23,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 574 transitions, 8997 flow [2024-06-27 21:18:26,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 574 transitions, 8830 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:18:26,641 INFO L231 Difference]: Finished difference. Result has 429 places, 550 transitions, 7660 flow [2024-06-27 21:18:26,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7083, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7660, PETRI_PLACES=429, PETRI_TRANSITIONS=550} [2024-06-27 21:18:26,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-27 21:18:26,642 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 550 transitions, 7660 flow [2024-06-27 21:18:26,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:26,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:26,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:26,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:18:26,642 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:26,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:26,643 INFO L85 PathProgramCache]: Analyzing trace with hash 630474789, now seen corresponding path program 16 times [2024-06-27 21:18:26,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:26,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687039057] [2024-06-27 21:18:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:26,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:30,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:30,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687039057] [2024-06-27 21:18:30,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687039057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:30,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:30,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:30,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363832483] [2024-06-27 21:18:30,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:30,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:30,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:30,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:30,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:30,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 550 transitions, 7660 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:30,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:30,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:30,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:32,408 INFO L124 PetriNetUnfolderBase]: 3276/5375 cut-off events. [2024-06-27 21:18:32,408 INFO L125 PetriNetUnfolderBase]: For 681363/681371 co-relation queries the response was YES. [2024-06-27 21:18:32,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42021 conditions, 5375 events. 3276/5375 cut-off events. For 681363/681371 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34011 event pairs, 640 based on Foata normal form. 2/5370 useless extension candidates. Maximal degree in co-relation 41839. Up to 4519 conditions per place. [2024-06-27 21:18:32,496 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 372 selfloop transitions, 219 changer transitions 0/596 dead transitions. [2024-06-27 21:18:32,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 596 transitions, 10080 flow [2024-06-27 21:18:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:18:32,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:18:32,498 INFO L175 Difference]: Start difference. First operand has 429 places, 550 transitions, 7660 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:18:32,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 596 transitions, 10080 flow [2024-06-27 21:18:35,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 596 transitions, 9708 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 21:18:35,776 INFO L231 Difference]: Finished difference. Result has 433 places, 562 transitions, 8014 flow [2024-06-27 21:18:35,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7324, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8014, PETRI_PLACES=433, PETRI_TRANSITIONS=562} [2024-06-27 21:18:35,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-27 21:18:35,776 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 562 transitions, 8014 flow [2024-06-27 21:18:35,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:35,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:35,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:35,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:18:35,777 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:35,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash -539546501, now seen corresponding path program 8 times [2024-06-27 21:18:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:35,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988781128] [2024-06-27 21:18:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:35,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:38,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:38,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988781128] [2024-06-27 21:18:38,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988781128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:38,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:38,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:38,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834161820] [2024-06-27 21:18:38,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:38,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:38,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:38,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:38,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:38,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:38,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 562 transitions, 8014 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:38,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:38,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:38,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:40,734 INFO L124 PetriNetUnfolderBase]: 3318/5441 cut-off events. [2024-06-27 21:18:40,734 INFO L125 PetriNetUnfolderBase]: For 723799/723818 co-relation queries the response was YES. [2024-06-27 21:18:40,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42940 conditions, 5441 events. 3318/5441 cut-off events. For 723799/723818 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34445 event pairs, 566 based on Foata normal form. 16/5453 useless extension candidates. Maximal degree in co-relation 42757. Up to 4550 conditions per place. [2024-06-27 21:18:40,814 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 187 changer transitions 0/605 dead transitions. [2024-06-27 21:18:40,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 605 transitions, 9938 flow [2024-06-27 21:18:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:40,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:18:40,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 21:18:40,816 INFO L175 Difference]: Start difference. First operand has 433 places, 562 transitions, 8014 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:18:40,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 605 transitions, 9938 flow [2024-06-27 21:18:44,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 605 transitions, 9062 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-27 21:18:44,466 INFO L231 Difference]: Finished difference. Result has 433 places, 574 transitions, 7726 flow [2024-06-27 21:18:44,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7138, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7726, PETRI_PLACES=433, PETRI_TRANSITIONS=574} [2024-06-27 21:18:44,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-27 21:18:44,467 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 574 transitions, 7726 flow [2024-06-27 21:18:44,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:44,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:44,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:44,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:18:44,468 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:44,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:44,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1821125129, now seen corresponding path program 9 times [2024-06-27 21:18:44,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:44,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392682728] [2024-06-27 21:18:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:44,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:47,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:47,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392682728] [2024-06-27 21:18:47,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392682728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:47,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:47,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:47,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118119015] [2024-06-27 21:18:47,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:47,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:47,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:47,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:47,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:47,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:47,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 574 transitions, 7726 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:47,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:47,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:47,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:49,306 INFO L124 PetriNetUnfolderBase]: 3312/5419 cut-off events. [2024-06-27 21:18:49,306 INFO L125 PetriNetUnfolderBase]: For 721544/721563 co-relation queries the response was YES. [2024-06-27 21:18:49,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42714 conditions, 5419 events. 3312/5419 cut-off events. For 721544/721563 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34239 event pairs, 619 based on Foata normal form. 16/5431 useless extension candidates. Maximal degree in co-relation 42531. Up to 4887 conditions per place. [2024-06-27 21:18:49,381 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 102 changer transitions 0/599 dead transitions. [2024-06-27 21:18:49,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 599 transitions, 8988 flow [2024-06-27 21:18:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:18:49,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 21:18:49,383 INFO L175 Difference]: Start difference. First operand has 433 places, 574 transitions, 7726 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:18:49,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 599 transitions, 8988 flow [2024-06-27 21:18:52,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 599 transitions, 8782 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 21:18:52,648 INFO L231 Difference]: Finished difference. Result has 438 places, 574 transitions, 7730 flow [2024-06-27 21:18:52,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7520, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7730, PETRI_PLACES=438, PETRI_TRANSITIONS=574} [2024-06-27 21:18:52,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-27 21:18:52,649 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 574 transitions, 7730 flow [2024-06-27 21:18:52,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:52,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:18:52,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:18:52,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:18:52,649 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:18:52,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:18:52,649 INFO L85 PathProgramCache]: Analyzing trace with hash 630773319, now seen corresponding path program 17 times [2024-06-27 21:18:52,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:18:52,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50947195] [2024-06-27 21:18:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:18:52,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:18:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:18:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:18:55,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:18:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50947195] [2024-06-27 21:18:55,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50947195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:18:55,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:18:55,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:18:55,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962944239] [2024-06-27 21:18:55,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:18:55,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:18:55,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:18:55,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:18:55,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:18:55,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:18:55,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 574 transitions, 7730 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:18:55,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:18:55,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:18:55,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:18:58,145 INFO L124 PetriNetUnfolderBase]: 3309/5421 cut-off events. [2024-06-27 21:18:58,145 INFO L125 PetriNetUnfolderBase]: For 720306/720314 co-relation queries the response was YES. [2024-06-27 21:18:58,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42773 conditions, 5421 events. 3309/5421 cut-off events. For 720306/720314 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34278 event pairs, 645 based on Foata normal form. 2/5416 useless extension candidates. Maximal degree in co-relation 42588. Up to 4566 conditions per place. [2024-06-27 21:18:58,232 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 382 selfloop transitions, 217 changer transitions 0/604 dead transitions. [2024-06-27 21:18:58,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 604 transitions, 9896 flow [2024-06-27 21:18:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:18:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:18:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:18:58,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 21:18:58,233 INFO L175 Difference]: Start difference. First operand has 438 places, 574 transitions, 7730 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:18:58,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 604 transitions, 9896 flow [2024-06-27 21:19:01,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 604 transitions, 9674 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:19:01,998 INFO L231 Difference]: Finished difference. Result has 440 places, 574 transitions, 7948 flow [2024-06-27 21:19:01,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7508, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7948, PETRI_PLACES=440, PETRI_TRANSITIONS=574} [2024-06-27 21:19:01,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-27 21:19:01,999 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 574 transitions, 7948 flow [2024-06-27 21:19:01,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:01,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:02,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:02,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:19:02,000 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:02,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:02,000 INFO L85 PathProgramCache]: Analyzing trace with hash 625112409, now seen corresponding path program 18 times [2024-06-27 21:19:02,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:02,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469660913] [2024-06-27 21:19:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:02,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:05,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:05,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469660913] [2024-06-27 21:19:05,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469660913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:05,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:05,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736577901] [2024-06-27 21:19:05,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:05,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:05,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:05,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:05,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:05,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:05,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 574 transitions, 7948 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:05,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:05,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:05,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:08,027 INFO L124 PetriNetUnfolderBase]: 3306/5413 cut-off events. [2024-06-27 21:19:08,027 INFO L125 PetriNetUnfolderBase]: For 725306/725314 co-relation queries the response was YES. [2024-06-27 21:19:08,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42713 conditions, 5413 events. 3306/5413 cut-off events. For 725306/725314 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34210 event pairs, 641 based on Foata normal form. 2/5408 useless extension candidates. Maximal degree in co-relation 42527. Up to 4563 conditions per place. [2024-06-27 21:19:08,119 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 224 changer transitions 0/607 dead transitions. [2024-06-27 21:19:08,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 607 transitions, 9914 flow [2024-06-27 21:19:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:19:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:19:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:19:08,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:19:08,121 INFO L175 Difference]: Start difference. First operand has 440 places, 574 transitions, 7948 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:19:08,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 607 transitions, 9914 flow [2024-06-27 21:19:11,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 607 transitions, 9431 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:19:11,898 INFO L231 Difference]: Finished difference. Result has 443 places, 574 transitions, 7919 flow [2024-06-27 21:19:11,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7465, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7919, PETRI_PLACES=443, PETRI_TRANSITIONS=574} [2024-06-27 21:19:11,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-27 21:19:11,898 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 574 transitions, 7919 flow [2024-06-27 21:19:11,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:11,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:11,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:11,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 21:19:11,899 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:11,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:11,900 INFO L85 PathProgramCache]: Analyzing trace with hash -650389227, now seen corresponding path program 10 times [2024-06-27 21:19:11,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:11,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93835097] [2024-06-27 21:19:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:11,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:15,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:15,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93835097] [2024-06-27 21:19:15,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93835097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:15,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:15,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:15,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017547492] [2024-06-27 21:19:15,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:15,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:15,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:15,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:15,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:15,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:15,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 574 transitions, 7919 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:15,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:15,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:15,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:17,470 INFO L124 PetriNetUnfolderBase]: 3300/5413 cut-off events. [2024-06-27 21:19:17,471 INFO L125 PetriNetUnfolderBase]: For 730925/730944 co-relation queries the response was YES. [2024-06-27 21:19:17,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42545 conditions, 5413 events. 3300/5413 cut-off events. For 730925/730944 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34321 event pairs, 619 based on Foata normal form. 16/5425 useless extension candidates. Maximal degree in co-relation 42358. Up to 4798 conditions per place. [2024-06-27 21:19:17,545 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 122 changer transitions 0/609 dead transitions. [2024-06-27 21:19:17,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 609 transitions, 9677 flow [2024-06-27 21:19:17,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:19:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:19:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-27 21:19:17,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-27 21:19:17,547 INFO L175 Difference]: Start difference. First operand has 443 places, 574 transitions, 7919 flow. Second operand 11 states and 181 transitions. [2024-06-27 21:19:17,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 609 transitions, 9677 flow [2024-06-27 21:19:21,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 609 transitions, 9171 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 21:19:21,015 INFO L231 Difference]: Finished difference. Result has 446 places, 574 transitions, 7663 flow [2024-06-27 21:19:21,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7413, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7663, PETRI_PLACES=446, PETRI_TRANSITIONS=574} [2024-06-27 21:19:21,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-27 21:19:21,016 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 574 transitions, 7663 flow [2024-06-27 21:19:21,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:21,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:21,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:21,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 21:19:21,016 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:21,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:21,016 INFO L85 PathProgramCache]: Analyzing trace with hash -655930539, now seen corresponding path program 19 times [2024-06-27 21:19:21,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:21,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647459725] [2024-06-27 21:19:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:21,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:24,658 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 21:19:24,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:24,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647459725] [2024-06-27 21:19:24,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647459725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:24,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:24,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:24,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353792715] [2024-06-27 21:19:24,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:24,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:24,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:24,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:24,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:24,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:24,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 574 transitions, 7663 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:24,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:24,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:24,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:26,832 INFO L124 PetriNetUnfolderBase]: 3310/5415 cut-off events. [2024-06-27 21:19:26,833 INFO L125 PetriNetUnfolderBase]: For 735525/735533 co-relation queries the response was YES. [2024-06-27 21:19:26,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42436 conditions, 5415 events. 3310/5415 cut-off events. For 735525/735533 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 34210 event pairs, 636 based on Foata normal form. 2/5410 useless extension candidates. Maximal degree in co-relation 42248. Up to 4822 conditions per place. [2024-06-27 21:19:26,932 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 117 changer transitions 0/606 dead transitions. [2024-06-27 21:19:26,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 606 transitions, 9018 flow [2024-06-27 21:19:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:19:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:19:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:19:26,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 21:19:26,934 INFO L175 Difference]: Start difference. First operand has 446 places, 574 transitions, 7663 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:19:26,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 606 transitions, 9018 flow [2024-06-27 21:19:30,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 606 transitions, 8634 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 21:19:31,000 INFO L231 Difference]: Finished difference. Result has 444 places, 580 transitions, 7606 flow [2024-06-27 21:19:31,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7279, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7606, PETRI_PLACES=444, PETRI_TRANSITIONS=580} [2024-06-27 21:19:31,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-27 21:19:31,001 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 580 transitions, 7606 flow [2024-06-27 21:19:31,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:31,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:31,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:31,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 21:19:31,002 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:31,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:31,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1639475733, now seen corresponding path program 13 times [2024-06-27 21:19:31,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:31,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327430304] [2024-06-27 21:19:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:31,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:34,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:34,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327430304] [2024-06-27 21:19:34,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327430304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:34,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:34,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:34,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372061564] [2024-06-27 21:19:34,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:34,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:34,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:34,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:34,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:34,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 580 transitions, 7606 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:34,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:34,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:34,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:36,652 INFO L124 PetriNetUnfolderBase]: 3320/5433 cut-off events. [2024-06-27 21:19:36,652 INFO L125 PetriNetUnfolderBase]: For 754415/754423 co-relation queries the response was YES. [2024-06-27 21:19:36,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42364 conditions, 5433 events. 3320/5433 cut-off events. For 754415/754423 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 34332 event pairs, 633 based on Foata normal form. 3/5429 useless extension candidates. Maximal degree in co-relation 42176. Up to 4785 conditions per place. [2024-06-27 21:19:36,727 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 132 changer transitions 0/615 dead transitions. [2024-06-27 21:19:36,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 615 transitions, 9197 flow [2024-06-27 21:19:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:19:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:19:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 21:19:36,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-27 21:19:36,729 INFO L175 Difference]: Start difference. First operand has 444 places, 580 transitions, 7606 flow. Second operand 11 states and 179 transitions. [2024-06-27 21:19:36,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 615 transitions, 9197 flow [2024-06-27 21:19:40,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 615 transitions, 8943 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:19:40,412 INFO L231 Difference]: Finished difference. Result has 449 places, 583 transitions, 7679 flow [2024-06-27 21:19:40,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7679, PETRI_PLACES=449, PETRI_TRANSITIONS=583} [2024-06-27 21:19:40,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-27 21:19:40,413 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 583 transitions, 7679 flow [2024-06-27 21:19:40,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:40,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:40,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:40,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 21:19:40,414 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:40,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash -646675923, now seen corresponding path program 14 times [2024-06-27 21:19:40,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:40,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730142241] [2024-06-27 21:19:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:40,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:43,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:43,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730142241] [2024-06-27 21:19:43,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730142241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:43,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:43,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:43,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929930680] [2024-06-27 21:19:43,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:43,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:43,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:43,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:43,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 583 transitions, 7679 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:43,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:43,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:43,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:46,039 INFO L124 PetriNetUnfolderBase]: 3330/5451 cut-off events. [2024-06-27 21:19:46,040 INFO L125 PetriNetUnfolderBase]: For 766993/767001 co-relation queries the response was YES. [2024-06-27 21:19:46,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42647 conditions, 5451 events. 3330/5451 cut-off events. For 766993/767001 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34520 event pairs, 639 based on Foata normal form. 3/5447 useless extension candidates. Maximal degree in co-relation 42458. Up to 4795 conditions per place. [2024-06-27 21:19:46,128 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 131 changer transitions 0/617 dead transitions. [2024-06-27 21:19:46,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 617 transitions, 9508 flow [2024-06-27 21:19:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:19:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:19:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-27 21:19:46,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:19:46,130 INFO L175 Difference]: Start difference. First operand has 449 places, 583 transitions, 7679 flow. Second operand 12 states and 192 transitions. [2024-06-27 21:19:46,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 617 transitions, 9508 flow [2024-06-27 21:19:49,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 617 transitions, 9048 flow, removed 45 selfloop flow, removed 10 redundant places. [2024-06-27 21:19:49,800 INFO L231 Difference]: Finished difference. Result has 451 places, 586 transitions, 7550 flow [2024-06-27 21:19:49,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7241, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7550, PETRI_PLACES=451, PETRI_TRANSITIONS=586} [2024-06-27 21:19:49,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-27 21:19:49,801 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 586 transitions, 7550 flow [2024-06-27 21:19:49,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:49,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:49,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:49,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 21:19:49,801 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:49,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:49,803 INFO L85 PathProgramCache]: Analyzing trace with hash 634492389, now seen corresponding path program 20 times [2024-06-27 21:19:49,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:49,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971338281] [2024-06-27 21:19:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:49,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:19:53,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:53,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971338281] [2024-06-27 21:19:53,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971338281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:53,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:53,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:53,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080599740] [2024-06-27 21:19:53,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:53,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:53,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:53,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:19:53,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 586 transitions, 7550 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:53,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:53,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:19:53,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:55,495 INFO L124 PetriNetUnfolderBase]: 3327/5455 cut-off events. [2024-06-27 21:19:55,495 INFO L125 PetriNetUnfolderBase]: For 764405/764413 co-relation queries the response was YES. [2024-06-27 21:19:55,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42202 conditions, 5455 events. 3327/5455 cut-off events. For 764405/764413 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34604 event pairs, 644 based on Foata normal form. 2/5450 useless extension candidates. Maximal degree in co-relation 42013. Up to 4836 conditions per place. [2024-06-27 21:19:55,572 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 123 changer transitions 0/609 dead transitions. [2024-06-27 21:19:55,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 609 transitions, 9054 flow [2024-06-27 21:19:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:19:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:19:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:19:55,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:19:55,574 INFO L175 Difference]: Start difference. First operand has 451 places, 586 transitions, 7550 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:19:55,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 609 transitions, 9054 flow [2024-06-27 21:19:59,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 609 transitions, 8698 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 21:19:59,538 INFO L231 Difference]: Finished difference. Result has 452 places, 586 transitions, 7446 flow [2024-06-27 21:19:59,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7194, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7446, PETRI_PLACES=452, PETRI_TRANSITIONS=586} [2024-06-27 21:19:59,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-27 21:19:59,539 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 586 transitions, 7446 flow [2024-06-27 21:19:59,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:19:59,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:59,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:59,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 21:19:59,540 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:59,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:59,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1374651541, now seen corresponding path program 11 times [2024-06-27 21:19:59,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:59,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582292850] [2024-06-27 21:19:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:59,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:02,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:02,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582292850] [2024-06-27 21:20:02,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582292850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:02,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:02,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:02,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858679304] [2024-06-27 21:20:02,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:02,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:02,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:02,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:02,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:02,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:20:02,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 586 transitions, 7446 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:02,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:02,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:20:02,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:05,326 INFO L124 PetriNetUnfolderBase]: 3337/5463 cut-off events. [2024-06-27 21:20:05,326 INFO L125 PetriNetUnfolderBase]: For 781147/781166 co-relation queries the response was YES. [2024-06-27 21:20:05,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41969 conditions, 5463 events. 3337/5463 cut-off events. For 781147/781166 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 34595 event pairs, 615 based on Foata normal form. 16/5475 useless extension candidates. Maximal degree in co-relation 41779. Up to 4980 conditions per place. [2024-06-27 21:20:05,402 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 67 changer transitions 0/620 dead transitions. [2024-06-27 21:20:05,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 620 transitions, 9044 flow [2024-06-27 21:20:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:20:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:20:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-27 21:20:05,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-27 21:20:05,403 INFO L175 Difference]: Start difference. First operand has 452 places, 586 transitions, 7446 flow. Second operand 11 states and 174 transitions. [2024-06-27 21:20:05,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 620 transitions, 9044 flow [2024-06-27 21:20:09,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 620 transitions, 8755 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:20:09,376 INFO L231 Difference]: Finished difference. Result has 456 places, 589 transitions, 7343 flow [2024-06-27 21:20:09,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7157, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7343, PETRI_PLACES=456, PETRI_TRANSITIONS=589} [2024-06-27 21:20:09,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-27 21:20:09,377 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 589 transitions, 7343 flow [2024-06-27 21:20:09,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:09,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:09,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:09,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 21:20:09,378 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:09,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:09,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1230940165, now seen corresponding path program 21 times [2024-06-27 21:20:09,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:09,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139507190] [2024-06-27 21:20:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:09,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:12,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:12,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139507190] [2024-06-27 21:20:12,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139507190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:12,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:12,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:12,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070837360] [2024-06-27 21:20:12,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:12,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:12,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:12,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:12,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:20:12,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 589 transitions, 7343 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:12,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:12,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:20:12,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:15,046 INFO L124 PetriNetUnfolderBase]: 3334/5469 cut-off events. [2024-06-27 21:20:15,046 INFO L125 PetriNetUnfolderBase]: For 778144/778152 co-relation queries the response was YES. [2024-06-27 21:20:15,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41780 conditions, 5469 events. 3334/5469 cut-off events. For 778144/778152 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 34704 event pairs, 648 based on Foata normal form. 2/5464 useless extension candidates. Maximal degree in co-relation 41589. Up to 4847 conditions per place. [2024-06-27 21:20:15,121 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 124 changer transitions 0/613 dead transitions. [2024-06-27 21:20:15,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 613 transitions, 8623 flow [2024-06-27 21:20:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:20:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:20:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-27 21:20:15,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37445887445887444 [2024-06-27 21:20:15,123 INFO L175 Difference]: Start difference. First operand has 456 places, 589 transitions, 7343 flow. Second operand 11 states and 173 transitions. [2024-06-27 21:20:15,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 613 transitions, 8623 flow [2024-06-27 21:20:18,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 613 transitions, 8451 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 21:20:18,146 INFO L231 Difference]: Finished difference. Result has 459 places, 589 transitions, 7425 flow [2024-06-27 21:20:18,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7171, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7425, PETRI_PLACES=459, PETRI_TRANSITIONS=589} [2024-06-27 21:20:18,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-27 21:20:18,146 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 589 transitions, 7425 flow [2024-06-27 21:20:18,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:18,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:18,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:18,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 21:20:18,147 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:18,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:18,147 INFO L85 PathProgramCache]: Analyzing trace with hash 634498341, now seen corresponding path program 12 times [2024-06-27 21:20:18,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:18,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581002039] [2024-06-27 21:20:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:21,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:21,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581002039] [2024-06-27 21:20:21,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581002039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:21,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:21,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:21,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750939459] [2024-06-27 21:20:21,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:21,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:21,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:21,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:21,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:21,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:20:21,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 589 transitions, 7425 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:21,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:21,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:20:21,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:23,659 INFO L124 PetriNetUnfolderBase]: 3328/5461 cut-off events. [2024-06-27 21:20:23,659 INFO L125 PetriNetUnfolderBase]: For 783985/784004 co-relation queries the response was YES. [2024-06-27 21:20:23,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41684 conditions, 5461 events. 3328/5461 cut-off events. For 783985/784004 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 34716 event pairs, 619 based on Foata normal form. 16/5473 useless extension candidates. Maximal degree in co-relation 41492. Up to 4971 conditions per place. [2024-06-27 21:20:23,753 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 67 changer transitions 0/620 dead transitions. [2024-06-27 21:20:23,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 620 transitions, 8741 flow [2024-06-27 21:20:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:20:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:20:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-27 21:20:23,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 21:20:23,755 INFO L175 Difference]: Start difference. First operand has 459 places, 589 transitions, 7425 flow. Second operand 12 states and 184 transitions. [2024-06-27 21:20:23,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 620 transitions, 8741 flow [2024-06-27 21:20:27,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 620 transitions, 8463 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-27 21:20:27,355 INFO L231 Difference]: Finished difference. Result has 461 places, 589 transitions, 7287 flow [2024-06-27 21:20:27,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7147, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7287, PETRI_PLACES=461, PETRI_TRANSITIONS=589} [2024-06-27 21:20:27,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-27 21:20:27,356 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 589 transitions, 7287 flow [2024-06-27 21:20:27,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:27,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:27,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:27,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 21:20:27,360 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:27,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash 634498155, now seen corresponding path program 15 times [2024-06-27 21:20:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:27,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77303697] [2024-06-27 21:20:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:20:30,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:30,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77303697] [2024-06-27 21:20:30,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77303697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:30,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:30,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:30,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171377169] [2024-06-27 21:20:30,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:30,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:30,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:30,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:30,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:30,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:20:30,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 589 transitions, 7287 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:30,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:30,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:20:30,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:32,412 INFO L124 PetriNetUnfolderBase]: 3322/5437 cut-off events. [2024-06-27 21:20:32,412 INFO L125 PetriNetUnfolderBase]: For 781323/781331 co-relation queries the response was YES. [2024-06-27 21:20:32,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41320 conditions, 5437 events. 3322/5437 cut-off events. For 781323/781331 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 34399 event pairs, 632 based on Foata normal form. 3/5433 useless extension candidates. Maximal degree in co-relation 41127. Up to 4788 conditions per place. [2024-06-27 21:20:32,498 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 130 changer transitions 0/616 dead transitions. [2024-06-27 21:20:32,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 616 transitions, 8821 flow [2024-06-27 21:20:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:20:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:20:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 21:20:32,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-27 21:20:32,500 INFO L175 Difference]: Start difference. First operand has 461 places, 589 transitions, 7287 flow. Second operand 10 states and 166 transitions. [2024-06-27 21:20:32,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 616 transitions, 8821 flow [2024-06-27 21:20:36,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 616 transitions, 8621 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-27 21:20:36,041 INFO L231 Difference]: Finished difference. Result has 458 places, 589 transitions, 7353 flow [2024-06-27 21:20:36,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7353, PETRI_PLACES=458, PETRI_TRANSITIONS=589} [2024-06-27 21:20:36,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-27 21:20:36,041 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 589 transitions, 7353 flow [2024-06-27 21:20:36,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:36,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:36,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:36,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 21:20:36,042 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:36,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1758679231, now seen corresponding path program 13 times [2024-06-27 21:20:36,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:36,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716712634] [2024-06-27 21:20:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:36,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:39,110 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 21:20:39,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:39,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716712634] [2024-06-27 21:20:39,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716712634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:39,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:39,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:20:39,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719461195] [2024-06-27 21:20:39,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:39,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:20:39,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:39,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:20:39,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:20:39,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:20:39,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 589 transitions, 7353 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:39,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:39,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:20:39,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:41,368 INFO L124 PetriNetUnfolderBase]: 3412/5595 cut-off events. [2024-06-27 21:20:41,368 INFO L125 PetriNetUnfolderBase]: For 869232/869251 co-relation queries the response was YES. [2024-06-27 21:20:41,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43606 conditions, 5595 events. 3412/5595 cut-off events. For 869232/869251 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35742 event pairs, 570 based on Foata normal form. 16/5607 useless extension candidates. Maximal degree in co-relation 43412. Up to 4874 conditions per place. [2024-06-27 21:20:41,458 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 490 selfloop transitions, 142 changer transitions 0/637 dead transitions. [2024-06-27 21:20:41,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 637 transitions, 9455 flow [2024-06-27 21:20:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:20:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:20:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-27 21:20:41,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-06-27 21:20:41,460 INFO L175 Difference]: Start difference. First operand has 458 places, 589 transitions, 7353 flow. Second operand 11 states and 178 transitions. [2024-06-27 21:20:41,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 637 transitions, 9455 flow [2024-06-27 21:20:45,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 637 transitions, 9195 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:20:45,468 INFO L231 Difference]: Finished difference. Result has 461 places, 607 transitions, 7693 flow [2024-06-27 21:20:45,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7093, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7693, PETRI_PLACES=461, PETRI_TRANSITIONS=607} [2024-06-27 21:20:45,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-27 21:20:45,468 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 607 transitions, 7693 flow [2024-06-27 21:20:45,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:20:45,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:45,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:20:45,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 21:20:45,469 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:45,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:45,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1260487527, now seen corresponding path program 14 times [2024-06-27 21:20:45,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:45,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514687363] [2024-06-27 21:20:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:45,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15