./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_power.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/safe009_power.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/safe009_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe009_power.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 21:00:23,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:00:23,336 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:00:23,339 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:00:23,339 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:00:23,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:00:23,352 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:00:23,352 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:00:23,352 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:00:23,353 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:00:23,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:00:23,353 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:00:23,354 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:00:23,354 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:00:23,354 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:00:23,354 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:00:23,354 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:00:23,355 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:00:23,355 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:00:23,355 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:00:23,355 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:00:23,358 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:00:23,359 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:00:23,359 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:00:23,362 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:00:23,362 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:00:23,362 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:00:23,363 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:00:23,363 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:00:23,364 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:00:23,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:00:23,364 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:00:23,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:00:23,365 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:00:23,365 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:00:23,365 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:00:23,365 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:00:23,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:00:23,365 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:00:23,366 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:00:23,366 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:00:23,366 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:00:23,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:00:23,366 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:00:23,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:00:23,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:00:23,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:00:23,578 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:00:23,578 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:00:23,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_power.oepc.i [2024-06-27 21:00:24,554 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:00:24,743 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:00:24,743 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_power.oepc.i [2024-06-27 21:00:24,755 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e90dbdfce/f9ec8103bcb84a6c915ac3a322c1ed8d/FLAG59d9ec843 [2024-06-27 21:00:24,764 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e90dbdfce/f9ec8103bcb84a6c915ac3a322c1ed8d [2024-06-27 21:00:24,766 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:00:24,767 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:00:24,767 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe009_power.oepc.yml/witness.yml [2024-06-27 21:00:24,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:00:24,964 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:00:24,967 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:00:24,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:00:24,970 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:00:24,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:00:24" (1/2) ... [2024-06-27 21:00:24,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74453b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:24, skipping insertion in model container [2024-06-27 21:00:24,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:00:24" (1/2) ... [2024-06-27 21:00:24,973 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41290d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:00:24, skipping insertion in model container [2024-06-27 21:00:24,974 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:00:24" (2/2) ... [2024-06-27 21:00:24,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74453b5d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:00:24, skipping insertion in model container [2024-06-27 21:00:24,974 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:00:24" (2/2) ... [2024-06-27 21:00:24,975 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:00:25,075 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:00:25,077 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$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 || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:00:25,077 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 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$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:00:25,077 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$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 || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 21:00:25,077 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:00:25,077 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-27 21:00:25,114 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:00:25,445 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:00:25,453 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:00:25,647 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:00:25,683 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:00:25,684 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:00:25 WrapperNode [2024-06-27 21:00:25,684 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:00:25,685 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:00:25,685 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:00:25,685 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:00:25,691 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,718 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,744 INFO L138 Inliner]: procedures = 175, calls = 83, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 224 [2024-06-27 21:00:25,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:00:25,746 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:00:25,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:00:25,747 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:00:25,755 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,755 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,770 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,796 INFO L175 MemorySlicer]: Split 44 memory accesses to 2 slices as follows [2, 42]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-27 21:00:25,796 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,796 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,804 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,818 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,820 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,821 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,824 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:00:25,831 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:00:25,831 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:00:25,831 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:00:25,832 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 09:00:25" (1/1) ... [2024-06-27 21:00:25,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:00:25,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:00:25,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:00:25,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:00:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:00:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:00:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:00:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:00:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:00:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:00:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:00:25,885 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:00:25,885 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:00:25,885 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:00:25,885 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:00:25,885 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:00:25,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:00:25,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:00:25,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:00:25,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:00:25,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:00:25,889 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:00:26,056 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:00:26,059 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:00:26,515 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:00:26,515 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:00:26,851 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:00:26,851 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:00:26,851 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:00:26 BoogieIcfgContainer [2024-06-27 21:00:26,851 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:00:26,854 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:00:26,855 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:00:26,857 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:00:26,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:00:24" (1/4) ... [2024-06-27 21:00:26,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556d775f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:00:26, skipping insertion in model container [2024-06-27 21:00:26,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:00:24" (2/4) ... [2024-06-27 21:00:26,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556d775f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:00:26, skipping insertion in model container [2024-06-27 21:00:26,858 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 09:00:25" (3/4) ... [2024-06-27 21:00:26,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556d775f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:00:26, skipping insertion in model container [2024-06-27 21:00:26,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:00:26" (4/4) ... [2024-06-27 21:00:26,860 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_power.oepc.i [2024-06-27 21:00:26,874 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:00:26,874 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:00:26,874 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:00:26,927 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:00:26,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:00:27,006 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 21:00:27,006 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:00:27,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:00:27,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:00:27,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 21:00:27,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:00:27,028 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;@c681712, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:00:27,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:00:27,033 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:00:27,033 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 21:00:27,033 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:00:27,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:27,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:00:27,034 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:27,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash 806232077, now seen corresponding path program 1 times [2024-06-27 21:00:27,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:27,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475923491] [2024-06-27 21:00:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:27,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:28,678 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 21:00:28,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:28,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475923491] [2024-06-27 21:00:28,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475923491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:28,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:28,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:00:28,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255902936] [2024-06-27 21:00:28,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:28,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:00:28,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:28,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:00:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:00:28,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:00:28,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:28,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:28,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:00:28,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:29,212 INFO L124 PetriNetUnfolderBase]: 990/1529 cut-off events. [2024-06-27 21:00:29,212 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 21:00:29,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3109 conditions, 1529 events. 990/1529 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7052 event pairs, 650 based on Foata normal form. 1/1497 useless extension candidates. Maximal degree in co-relation 3097. Up to 1503 conditions per place. [2024-06-27 21:00:29,222 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 21:00:29,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 179 flow [2024-06-27 21:00:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:00:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:00:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-27 21:00:29,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-27 21:00:29,233 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 68 transitions. [2024-06-27 21:00:29,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 179 flow [2024-06-27 21:00:29,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:29,237 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 21:00:29,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 21:00:29,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 21:00:29,241 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 21:00:29,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:29,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:29,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:29,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:00:29,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:29,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:29,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1694942860, now seen corresponding path program 1 times [2024-06-27 21:00:29,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:29,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030407559] [2024-06-27 21:00:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:29,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:31,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:31,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030407559] [2024-06-27 21:00:31,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030407559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:31,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:31,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:00:31,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750639678] [2024-06-27 21:00:31,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:31,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:00:31,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:00:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:00:31,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:00:31,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:31,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:31,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:00:31,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:31,872 INFO L124 PetriNetUnfolderBase]: 984/1519 cut-off events. [2024-06-27 21:00:31,873 INFO L125 PetriNetUnfolderBase]: For 287/291 co-relation queries the response was YES. [2024-06-27 21:00:31,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3528 conditions, 1519 events. 984/1519 cut-off events. For 287/291 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6972 event pairs, 540 based on Foata normal form. 5/1520 useless extension candidates. Maximal degree in co-relation 3516. Up to 1475 conditions per place. [2024-06-27 21:00:31,890 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-27 21:00:31,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 254 flow [2024-06-27 21:00:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:00:31,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:00:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-27 21:00:31,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-27 21:00:31,892 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 89 transitions. [2024-06-27 21:00:31,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 254 flow [2024-06-27 21:00:31,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:00:31,894 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 21:00:31,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 21:00:31,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 21:00:31,895 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 21:00:31,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:31,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:31,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:31,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:00:31,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:31,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:31,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1003622111, now seen corresponding path program 1 times [2024-06-27 21:00:31,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:31,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636298700] [2024-06-27 21:00:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:34,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:34,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636298700] [2024-06-27 21:00:34,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636298700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:34,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:34,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:00:34,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595725921] [2024-06-27 21:00:34,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:34,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:00:34,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:34,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:00:34,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:00:34,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:00:34,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:34,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:34,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:00:34,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:34,807 INFO L124 PetriNetUnfolderBase]: 1183/1810 cut-off events. [2024-06-27 21:00:34,807 INFO L125 PetriNetUnfolderBase]: For 937/937 co-relation queries the response was YES. [2024-06-27 21:00:34,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4673 conditions, 1810 events. 1183/1810 cut-off events. For 937/937 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8227 event pairs, 510 based on Foata normal form. 3/1810 useless extension candidates. Maximal degree in co-relation 4659. Up to 1748 conditions per place. [2024-06-27 21:00:34,818 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-27 21:00:34,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 379 flow [2024-06-27 21:00:34,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:00:34,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:00:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 21:00:34,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-27 21:00:34,822 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 106 transitions. [2024-06-27 21:00:34,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 379 flow [2024-06-27 21:00:34,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 358 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 21:00:34,826 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 206 flow [2024-06-27 21:00:34,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2024-06-27 21:00:34,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-27 21:00:34,827 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 206 flow [2024-06-27 21:00:34,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:34,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:34,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:34,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:00:34,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:34,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:34,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1887354456, now seen corresponding path program 1 times [2024-06-27 21:00:34,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:34,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485601726] [2024-06-27 21:00:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:34,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:36,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485601726] [2024-06-27 21:00:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485601726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:36,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:00:36,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29824657] [2024-06-27 21:00:36,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:36,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:00:36,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:37,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:00:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:00:37,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:00:37,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:37,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:37,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:00:37,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:37,791 INFO L124 PetriNetUnfolderBase]: 1174/1795 cut-off events. [2024-06-27 21:00:37,792 INFO L125 PetriNetUnfolderBase]: For 1619/1619 co-relation queries the response was YES. [2024-06-27 21:00:37,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5131 conditions, 1795 events. 1174/1795 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8136 event pairs, 365 based on Foata normal form. 6/1798 useless extension candidates. Maximal degree in co-relation 5114. Up to 1695 conditions per place. [2024-06-27 21:00:37,801 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 64 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-06-27 21:00:37,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 442 flow [2024-06-27 21:00:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 21:00:37,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-27 21:00:37,804 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 206 flow. Second operand 6 states and 121 transitions. [2024-06-27 21:00:37,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 442 flow [2024-06-27 21:00:37,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 438 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 21:00:37,806 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 241 flow [2024-06-27 21:00:37,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-27 21:00:37,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-27 21:00:37,807 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 241 flow [2024-06-27 21:00:37,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:37,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:37,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:37,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:00:37,808 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 21:00:37,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash 878834218, now seen corresponding path program 1 times [2024-06-27 21:00:37,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:37,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369964240] [2024-06-27 21:00:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:39,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:39,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369964240] [2024-06-27 21:00:39,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369964240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:39,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:39,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:00:39,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000823898] [2024-06-27 21:00:39,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:39,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:00:39,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:39,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:00:39,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:00:39,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:00:39,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 241 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:39,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:39,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:00:39,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:40,090 INFO L124 PetriNetUnfolderBase]: 1192/1822 cut-off events. [2024-06-27 21:00:40,090 INFO L125 PetriNetUnfolderBase]: For 2571/2574 co-relation queries the response was YES. [2024-06-27 21:00:40,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5549 conditions, 1822 events. 1192/1822 cut-off events. For 2571/2574 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8331 event pairs, 452 based on Foata normal form. 10/1828 useless extension candidates. Maximal degree in co-relation 5528. Up to 1694 conditions per place. [2024-06-27 21:00:40,100 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 13 changer transitions 0/76 dead transitions. [2024-06-27 21:00:40,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 475 flow [2024-06-27 21:00:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:00:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:00:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-27 21:00:40,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-27 21:00:40,104 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 241 flow. Second operand 5 states and 93 transitions. [2024-06-27 21:00:40,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 475 flow [2024-06-27 21:00:40,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 446 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:40,114 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 299 flow [2024-06-27 21:00:40,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-27 21:00:40,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-27 21:00:40,116 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 299 flow [2024-06-27 21:00:40,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:40,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:40,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:40,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:00:40,116 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:40,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:40,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1202666823, now seen corresponding path program 1 times [2024-06-27 21:00:40,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:40,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687935085] [2024-06-27 21:00:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:40,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:42,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:42,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687935085] [2024-06-27 21:00:42,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687935085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:42,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:42,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:42,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082200093] [2024-06-27 21:00:42,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:42,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:42,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:42,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:42,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:00:42,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 299 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:42,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:42,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:00:42,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:43,821 INFO L124 PetriNetUnfolderBase]: 1205/1847 cut-off events. [2024-06-27 21:00:43,822 INFO L125 PetriNetUnfolderBase]: For 3810/3816 co-relation queries the response was YES. [2024-06-27 21:00:43,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6311 conditions, 1847 events. 1205/1847 cut-off events. For 3810/3816 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8475 event pairs, 455 based on Foata normal form. 6/1849 useless extension candidates. Maximal degree in co-relation 6287. Up to 1726 conditions per place. [2024-06-27 21:00:43,831 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 21 changer transitions 0/96 dead transitions. [2024-06-27 21:00:43,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 633 flow [2024-06-27 21:00:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:00:43,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-27 21:00:43,832 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 299 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:00:43,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 633 flow [2024-06-27 21:00:43,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 96 transitions, 621 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 21:00:43,837 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 391 flow [2024-06-27 21:00:43,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-27 21:00:43,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-27 21:00:43,840 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 391 flow [2024-06-27 21:00:43,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:43,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:43,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:43,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:00:43,841 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:43,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1726182767, now seen corresponding path program 2 times [2024-06-27 21:00:43,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:43,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766325856] [2024-06-27 21:00:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:43,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:46,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:46,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766325856] [2024-06-27 21:00:46,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766325856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:46,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:46,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:46,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48341070] [2024-06-27 21:00:46,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:46,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:46,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:46,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:46,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:46,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:00:46,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:46,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:46,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:00:46,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:47,701 INFO L124 PetriNetUnfolderBase]: 1231/1891 cut-off events. [2024-06-27 21:00:47,702 INFO L125 PetriNetUnfolderBase]: For 5413/5419 co-relation queries the response was YES. [2024-06-27 21:00:47,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6957 conditions, 1891 events. 1231/1891 cut-off events. For 5413/5419 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8687 event pairs, 455 based on Foata normal form. 6/1893 useless extension candidates. Maximal degree in co-relation 6930. Up to 1791 conditions per place. [2024-06-27 21:00:47,714 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 73 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-27 21:00:47,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 96 transitions, 695 flow [2024-06-27 21:00:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:00:47,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-27 21:00:47,716 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 391 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:00:47,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 96 transitions, 695 flow [2024-06-27 21:00:47,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 96 transitions, 655 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:47,722 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 455 flow [2024-06-27 21:00:47,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-27 21:00:47,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-27 21:00:47,723 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 455 flow [2024-06-27 21:00:47,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:47,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:47,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:47,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:00:47,724 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:47,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:47,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1726182581, now seen corresponding path program 1 times [2024-06-27 21:00:47,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:47,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353704897] [2024-06-27 21:00:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:47,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:49,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:49,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353704897] [2024-06-27 21:00:49,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353704897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:49,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:49,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:49,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764376247] [2024-06-27 21:00:49,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:49,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:49,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:49,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:49,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:49,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:00:49,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 455 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:49,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:49,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:00:49,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:51,082 INFO L124 PetriNetUnfolderBase]: 1433/2175 cut-off events. [2024-06-27 21:00:51,082 INFO L125 PetriNetUnfolderBase]: For 7177/7183 co-relation queries the response was YES. [2024-06-27 21:00:51,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8139 conditions, 2175 events. 1433/2175 cut-off events. For 7177/7183 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10050 event pairs, 466 based on Foata normal form. 12/2183 useless extension candidates. Maximal degree in co-relation 8110. Up to 1925 conditions per place. [2024-06-27 21:00:51,102 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 93 selfloop transitions, 28 changer transitions 0/125 dead transitions. [2024-06-27 21:00:51,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 125 transitions, 929 flow [2024-06-27 21:00:51,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:00:51,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-27 21:00:51,105 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 455 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:00:51,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 125 transitions, 929 flow [2024-06-27 21:00:51,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 125 transitions, 877 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:51,112 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 561 flow [2024-06-27 21:00:51,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=561, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-27 21:00:51,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-27 21:00:51,114 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 561 flow [2024-06-27 21:00:51,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:51,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:51,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:51,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:00:51,115 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:51,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:51,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1993887929, now seen corresponding path program 2 times [2024-06-27 21:00:51,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:51,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904287305] [2024-06-27 21:00:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:51,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:53,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:53,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904287305] [2024-06-27 21:00:53,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904287305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:53,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:53,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:53,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570319521] [2024-06-27 21:00:53,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:53,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:53,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:53,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:53,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:53,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:00:53,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:53,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:53,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:00:53,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:54,370 INFO L124 PetriNetUnfolderBase]: 1515/2293 cut-off events. [2024-06-27 21:00:54,371 INFO L125 PetriNetUnfolderBase]: For 10699/10746 co-relation queries the response was YES. [2024-06-27 21:00:54,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9474 conditions, 2293 events. 1515/2293 cut-off events. For 10699/10746 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10756 event pairs, 457 based on Foata normal form. 38/2323 useless extension candidates. Maximal degree in co-relation 9442. Up to 1777 conditions per place. [2024-06-27 21:00:54,386 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 79 selfloop transitions, 41 changer transitions 0/124 dead transitions. [2024-06-27 21:00:54,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 124 transitions, 1040 flow [2024-06-27 21:00:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 21:00:54,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46747967479674796 [2024-06-27 21:00:54,388 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 561 flow. Second operand 6 states and 115 transitions. [2024-06-27 21:00:54,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 124 transitions, 1040 flow [2024-06-27 21:00:54,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 124 transitions, 984 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:54,398 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 750 flow [2024-06-27 21:00:54,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=750, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2024-06-27 21:00:54,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-27 21:00:54,399 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 750 flow [2024-06-27 21:00:54,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:54,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:54,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:54,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:00:54,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:54,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash -796620267, now seen corresponding path program 3 times [2024-06-27 21:00:54,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:54,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398636868] [2024-06-27 21:00:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:54,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:56,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:56,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398636868] [2024-06-27 21:00:56,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398636868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:56,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:56,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:56,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103002923] [2024-06-27 21:00:56,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:56,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:56,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:56,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:56,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:56,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:00:56,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 750 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:56,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:56,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:00:56,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:57,503 INFO L124 PetriNetUnfolderBase]: 1501/2271 cut-off events. [2024-06-27 21:00:57,503 INFO L125 PetriNetUnfolderBase]: For 12454/12460 co-relation queries the response was YES. [2024-06-27 21:00:57,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10332 conditions, 2271 events. 1501/2271 cut-off events. For 12454/12460 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10531 event pairs, 474 based on Foata normal form. 12/2279 useless extension candidates. Maximal degree in co-relation 10297. Up to 2013 conditions per place. [2024-06-27 21:00:57,515 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 90 selfloop transitions, 31 changer transitions 0/125 dead transitions. [2024-06-27 21:00:57,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 1093 flow [2024-06-27 21:00:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:00:57,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-27 21:00:57,517 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 750 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:00:57,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 1093 flow [2024-06-27 21:00:57,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 125 transitions, 1053 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-27 21:00:57,533 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 818 flow [2024-06-27 21:00:57,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=818, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2024-06-27 21:00:57,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-27 21:00:57,534 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 818 flow [2024-06-27 21:00:57,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:57,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:57,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:57,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:00:57,534 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:57,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:57,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1994125265, now seen corresponding path program 3 times [2024-06-27 21:00:57,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:57,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256441225] [2024-06-27 21:00:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:57,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:59,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:59,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256441225] [2024-06-27 21:00:59,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256441225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:59,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:59,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:00:59,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867288763] [2024-06-27 21:00:59,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:59,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:00:59,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:59,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:00:59,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:00:59,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:00:59,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 818 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:59,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:59,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:00:59,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:00,810 INFO L124 PetriNetUnfolderBase]: 1496/2264 cut-off events. [2024-06-27 21:01:00,810 INFO L125 PetriNetUnfolderBase]: For 13321/13324 co-relation queries the response was YES. [2024-06-27 21:01:00,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10441 conditions, 2264 events. 1496/2264 cut-off events. For 13321/13324 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10519 event pairs, 504 based on Foata normal form. 4/2264 useless extension candidates. Maximal degree in co-relation 10402. Up to 2134 conditions per place. [2024-06-27 21:01:00,824 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 95 selfloop transitions, 24 changer transitions 0/123 dead transitions. [2024-06-27 21:01:00,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 123 transitions, 1122 flow [2024-06-27 21:01:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:01:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:01:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:01:00,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-27 21:01:00,826 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 818 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:01:00,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 123 transitions, 1122 flow [2024-06-27 21:01:00,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 1055 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:00,842 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 815 flow [2024-06-27 21:01:00,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=815, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-06-27 21:01:00,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-27 21:01:00,842 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 815 flow [2024-06-27 21:01:00,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:00,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:00,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:00,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:01:00,843 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 21:01:00,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1993879001, now seen corresponding path program 1 times [2024-06-27 21:01:00,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:00,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518643223] [2024-06-27 21:01:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:00,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:03,212 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 21:01:03,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:03,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518643223] [2024-06-27 21:01:03,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518643223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:03,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:03,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:03,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817099675] [2024-06-27 21:01:03,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:03,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:03,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:03,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:03,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:03,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:03,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 815 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:03,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:03,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:03,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:04,237 INFO L124 PetriNetUnfolderBase]: 1548/2348 cut-off events. [2024-06-27 21:01:04,237 INFO L125 PetriNetUnfolderBase]: For 15749/15752 co-relation queries the response was YES. [2024-06-27 21:01:04,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10681 conditions, 2348 events. 1548/2348 cut-off events. For 15749/15752 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10995 event pairs, 432 based on Foata normal form. 18/2362 useless extension candidates. Maximal degree in co-relation 10641. Up to 2114 conditions per place. [2024-06-27 21:01:04,249 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 110 selfloop transitions, 15 changer transitions 0/129 dead transitions. [2024-06-27 21:01:04,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 129 transitions, 1195 flow [2024-06-27 21:01:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:01:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:01:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 21:01:04,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-27 21:01:04,251 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 815 flow. Second operand 6 states and 113 transitions. [2024-06-27 21:01:04,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 129 transitions, 1195 flow [2024-06-27 21:01:04,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 129 transitions, 1141 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:01:04,266 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 829 flow [2024-06-27 21:01:04,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=829, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-27 21:01:04,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-27 21:01:04,266 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 829 flow [2024-06-27 21:01:04,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:04,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:04,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:04,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:01:04,267 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 21:01:04,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:04,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1975775176, now seen corresponding path program 1 times [2024-06-27 21:01:04,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:04,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742557595] [2024-06-27 21:01:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:04,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:07,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:07,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742557595] [2024-06-27 21:01:07,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742557595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:07,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:07,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:07,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529908587] [2024-06-27 21:01:07,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:07,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:07,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:07,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:07,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:07,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:07,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 829 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:07,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:07,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:07,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:08,573 INFO L124 PetriNetUnfolderBase]: 1750/2656 cut-off events. [2024-06-27 21:01:08,573 INFO L125 PetriNetUnfolderBase]: For 17215/17218 co-relation queries the response was YES. [2024-06-27 21:01:08,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12122 conditions, 2656 events. 1750/2656 cut-off events. For 17215/17218 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12749 event pairs, 523 based on Foata normal form. 10/2662 useless extension candidates. Maximal degree in co-relation 12081. Up to 2063 conditions per place. [2024-06-27 21:01:08,586 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 117 selfloop transitions, 51 changer transitions 0/172 dead transitions. [2024-06-27 21:01:08,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 172 transitions, 1515 flow [2024-06-27 21:01:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:01:08,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:01:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 21:01:08,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-27 21:01:08,589 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 829 flow. Second operand 11 states and 201 transitions. [2024-06-27 21:01:08,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 172 transitions, 1515 flow [2024-06-27 21:01:08,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 172 transitions, 1473 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:08,605 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 1023 flow [2024-06-27 21:01:08,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1023, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-06-27 21:01:08,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-27 21:01:08,606 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 1023 flow [2024-06-27 21:01:08,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:08,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:08,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:08,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:01:08,606 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 21:01:08,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:08,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1972056106, now seen corresponding path program 2 times [2024-06-27 21:01:08,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:08,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044189202] [2024-06-27 21:01:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:08,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:11,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:11,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044189202] [2024-06-27 21:01:11,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044189202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:11,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:11,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:11,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104133097] [2024-06-27 21:01:11,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:11,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:11,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:11,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:11,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 1023 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:11,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:11,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:11,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:12,648 INFO L124 PetriNetUnfolderBase]: 1888/2870 cut-off events. [2024-06-27 21:01:12,649 INFO L125 PetriNetUnfolderBase]: For 23051/23054 co-relation queries the response was YES. [2024-06-27 21:01:12,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14188 conditions, 2870 events. 1888/2870 cut-off events. For 23051/23054 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14049 event pairs, 544 based on Foata normal form. 10/2876 useless extension candidates. Maximal degree in co-relation 14144. Up to 2412 conditions per place. [2024-06-27 21:01:12,664 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 131 selfloop transitions, 39 changer transitions 0/174 dead transitions. [2024-06-27 21:01:12,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 174 transitions, 1697 flow [2024-06-27 21:01:12,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 21:01:12,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 21:01:12,666 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 1023 flow. Second operand 10 states and 185 transitions. [2024-06-27 21:01:12,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 174 transitions, 1697 flow [2024-06-27 21:01:12,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 174 transitions, 1586 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:12,689 INFO L231 Difference]: Finished difference. Result has 101 places, 118 transitions, 1108 flow [2024-06-27 21:01:12,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1108, PETRI_PLACES=101, PETRI_TRANSITIONS=118} [2024-06-27 21:01:12,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-27 21:01:12,690 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 118 transitions, 1108 flow [2024-06-27 21:01:12,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:12,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:12,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:12,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:01:12,691 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 21:01:12,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:12,691 INFO L85 PathProgramCache]: Analyzing trace with hash 690177720, now seen corresponding path program 3 times [2024-06-27 21:01:12,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:12,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123780830] [2024-06-27 21:01:12,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:12,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:15,552 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 21:01:15,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:15,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123780830] [2024-06-27 21:01:15,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123780830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:15,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:15,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:15,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56427595] [2024-06-27 21:01:15,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:15,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:15,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:15,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:15,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:15,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:15,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 118 transitions, 1108 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:15,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:15,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:15,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:17,257 INFO L124 PetriNetUnfolderBase]: 1906/2908 cut-off events. [2024-06-27 21:01:17,257 INFO L125 PetriNetUnfolderBase]: For 25987/25990 co-relation queries the response was YES. [2024-06-27 21:01:17,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14831 conditions, 2908 events. 1906/2908 cut-off events. For 25987/25990 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14404 event pairs, 532 based on Foata normal form. 10/2914 useless extension candidates. Maximal degree in co-relation 14784. Up to 2430 conditions per place. [2024-06-27 21:01:17,272 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 137 selfloop transitions, 45 changer transitions 0/186 dead transitions. [2024-06-27 21:01:17,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 186 transitions, 1754 flow [2024-06-27 21:01:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:01:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:01:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-27 21:01:17,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369918699186992 [2024-06-27 21:01:17,274 INFO L175 Difference]: Start difference. First operand has 101 places, 118 transitions, 1108 flow. Second operand 12 states and 215 transitions. [2024-06-27 21:01:17,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 186 transitions, 1754 flow [2024-06-27 21:01:17,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 186 transitions, 1683 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:17,298 INFO L231 Difference]: Finished difference. Result has 107 places, 122 transitions, 1194 flow [2024-06-27 21:01:17,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1194, PETRI_PLACES=107, PETRI_TRANSITIONS=122} [2024-06-27 21:01:17,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-27 21:01:17,299 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 122 transitions, 1194 flow [2024-06-27 21:01:17,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:17,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:17,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:17,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:01:17,300 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 21:01:17,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:17,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1074577432, now seen corresponding path program 4 times [2024-06-27 21:01:17,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:17,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151122901] [2024-06-27 21:01:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:17,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:19,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:19,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151122901] [2024-06-27 21:01:19,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151122901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:19,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:19,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:19,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596680399] [2024-06-27 21:01:19,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:19,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:19,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:19,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:19,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:19,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:19,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 122 transitions, 1194 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:19,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:19,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:19,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:21,244 INFO L124 PetriNetUnfolderBase]: 2108/3230 cut-off events. [2024-06-27 21:01:21,244 INFO L125 PetriNetUnfolderBase]: For 31281/31284 co-relation queries the response was YES. [2024-06-27 21:01:21,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17121 conditions, 3230 events. 2108/3230 cut-off events. For 31281/31284 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16449 event pairs, 541 based on Foata normal form. 10/3236 useless extension candidates. Maximal degree in co-relation 17072. Up to 2510 conditions per place. [2024-06-27 21:01:21,265 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 125 selfloop transitions, 64 changer transitions 0/193 dead transitions. [2024-06-27 21:01:21,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 193 transitions, 2094 flow [2024-06-27 21:01:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:01:21,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-27 21:01:21,269 INFO L175 Difference]: Start difference. First operand has 107 places, 122 transitions, 1194 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:01:21,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 193 transitions, 2094 flow [2024-06-27 21:01:21,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 193 transitions, 1932 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-27 21:01:21,301 INFO L231 Difference]: Finished difference. Result has 108 places, 145 transitions, 1570 flow [2024-06-27 21:01:21,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1570, PETRI_PLACES=108, PETRI_TRANSITIONS=145} [2024-06-27 21:01:21,301 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-27 21:01:21,301 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 145 transitions, 1570 flow [2024-06-27 21:01:21,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:21,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:21,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:21,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:01:21,302 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:21,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:21,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1688338952, now seen corresponding path program 5 times [2024-06-27 21:01:21,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:21,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427757156] [2024-06-27 21:01:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:21,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:23,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:23,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427757156] [2024-06-27 21:01:23,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427757156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:23,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:23,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:23,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491742339] [2024-06-27 21:01:23,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:23,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:23,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:23,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:23,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:23,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:23,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 145 transitions, 1570 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:23,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:23,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:23,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:25,138 INFO L124 PetriNetUnfolderBase]: 2094/3212 cut-off events. [2024-06-27 21:01:25,139 INFO L125 PetriNetUnfolderBase]: For 34878/34881 co-relation queries the response was YES. [2024-06-27 21:01:25,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17626 conditions, 3212 events. 2094/3212 cut-off events. For 34878/34881 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16377 event pairs, 567 based on Foata normal form. 10/3218 useless extension candidates. Maximal degree in co-relation 17574. Up to 2504 conditions per place. [2024-06-27 21:01:25,156 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 132 selfloop transitions, 60 changer transitions 0/196 dead transitions. [2024-06-27 21:01:25,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 196 transitions, 2148 flow [2024-06-27 21:01:25,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:01:25,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-27 21:01:25,157 INFO L175 Difference]: Start difference. First operand has 108 places, 145 transitions, 1570 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:01:25,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 196 transitions, 2148 flow [2024-06-27 21:01:25,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 196 transitions, 2056 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:25,197 INFO L231 Difference]: Finished difference. Result has 114 places, 146 transitions, 1650 flow [2024-06-27 21:01:25,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1650, PETRI_PLACES=114, PETRI_TRANSITIONS=146} [2024-06-27 21:01:25,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-27 21:01:25,198 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 146 transitions, 1650 flow [2024-06-27 21:01:25,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:25,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:25,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:25,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:01:25,199 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:25,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:25,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1680981722, now seen corresponding path program 6 times [2024-06-27 21:01:25,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:25,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935766180] [2024-06-27 21:01:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:25,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:27,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:27,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935766180] [2024-06-27 21:01:27,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935766180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:27,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:27,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:27,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549832697] [2024-06-27 21:01:27,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:27,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:27,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:27,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:27,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:27,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:27,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 146 transitions, 1650 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:27,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:27,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:27,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:29,538 INFO L124 PetriNetUnfolderBase]: 2192/3370 cut-off events. [2024-06-27 21:01:29,538 INFO L125 PetriNetUnfolderBase]: For 40209/40252 co-relation queries the response was YES. [2024-06-27 21:01:29,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18971 conditions, 3370 events. 2192/3370 cut-off events. For 40209/40252 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17369 event pairs, 459 based on Foata normal form. 36/3398 useless extension candidates. Maximal degree in co-relation 18916. Up to 2144 conditions per place. [2024-06-27 21:01:29,558 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 109 selfloop transitions, 100 changer transitions 0/213 dead transitions. [2024-06-27 21:01:29,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 213 transitions, 2456 flow [2024-06-27 21:01:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 21:01:29,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-27 21:01:29,560 INFO L175 Difference]: Start difference. First operand has 114 places, 146 transitions, 1650 flow. Second operand 9 states and 176 transitions. [2024-06-27 21:01:29,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 213 transitions, 2456 flow [2024-06-27 21:01:29,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 213 transitions, 2376 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:01:29,599 INFO L231 Difference]: Finished difference. Result has 119 places, 158 transitions, 1952 flow [2024-06-27 21:01:29,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1952, PETRI_PLACES=119, PETRI_TRANSITIONS=158} [2024-06-27 21:01:29,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-27 21:01:29,600 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 158 transitions, 1952 flow [2024-06-27 21:01:29,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:29,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:29,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:29,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:01:29,601 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:29,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:29,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1395400094, now seen corresponding path program 1 times [2024-06-27 21:01:29,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:29,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001866071] [2024-06-27 21:01:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:29,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:30,681 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 21:01:30,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001866071] [2024-06-27 21:01:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001866071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:30,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:30,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:01:30,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121268973] [2024-06-27 21:01:30,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:30,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:01:30,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:01:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:01:30,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:01:30,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 158 transitions, 1952 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:30,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:30,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:01:30,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:31,627 INFO L124 PetriNetUnfolderBase]: 2054/3167 cut-off events. [2024-06-27 21:01:31,627 INFO L125 PetriNetUnfolderBase]: For 46647/46649 co-relation queries the response was YES. [2024-06-27 21:01:31,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19297 conditions, 3167 events. 2054/3167 cut-off events. For 46647/46649 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16201 event pairs, 543 based on Foata normal form. 8/3151 useless extension candidates. Maximal degree in co-relation 19240. Up to 2919 conditions per place. [2024-06-27 21:01:31,650 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 146 selfloop transitions, 14 changer transitions 0/172 dead transitions. [2024-06-27 21:01:31,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 172 transitions, 2304 flow [2024-06-27 21:01:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:01:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:01:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 21:01:31,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:01:31,652 INFO L175 Difference]: Start difference. First operand has 119 places, 158 transitions, 1952 flow. Second operand 5 states and 90 transitions. [2024-06-27 21:01:31,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 172 transitions, 2304 flow [2024-06-27 21:01:31,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 172 transitions, 2172 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:31,713 INFO L231 Difference]: Finished difference. Result has 120 places, 158 transitions, 1857 flow [2024-06-27 21:01:31,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1857, PETRI_PLACES=120, PETRI_TRANSITIONS=158} [2024-06-27 21:01:31,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-27 21:01:31,714 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 158 transitions, 1857 flow [2024-06-27 21:01:31,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:31,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:31,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:31,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:01:31,715 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:31,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:31,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1663391650, now seen corresponding path program 1 times [2024-06-27 21:01:31,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:31,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679423463] [2024-06-27 21:01:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:31,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:34,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:34,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679423463] [2024-06-27 21:01:34,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679423463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:34,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:34,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:34,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391603026] [2024-06-27 21:01:34,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:34,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:34,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:34,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:34,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:34,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:34,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 158 transitions, 1857 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:34,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:34,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:34,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:35,751 INFO L124 PetriNetUnfolderBase]: 2148/3288 cut-off events. [2024-06-27 21:01:35,751 INFO L125 PetriNetUnfolderBase]: For 47267/47270 co-relation queries the response was YES. [2024-06-27 21:01:35,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19930 conditions, 3288 events. 2148/3288 cut-off events. For 47267/47270 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16816 event pairs, 497 based on Foata normal form. 6/3290 useless extension candidates. Maximal degree in co-relation 19871. Up to 2947 conditions per place. [2024-06-27 21:01:35,773 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 32 changer transitions 0/203 dead transitions. [2024-06-27 21:01:35,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 203 transitions, 2519 flow [2024-06-27 21:01:35,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:01:35,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 21:01:35,774 INFO L175 Difference]: Start difference. First operand has 120 places, 158 transitions, 1857 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:01:35,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 203 transitions, 2519 flow [2024-06-27 21:01:35,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 203 transitions, 2485 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:35,828 INFO L231 Difference]: Finished difference. Result has 124 places, 162 transitions, 1994 flow [2024-06-27 21:01:35,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1994, PETRI_PLACES=124, PETRI_TRANSITIONS=162} [2024-06-27 21:01:35,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-27 21:01:35,829 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 162 transitions, 1994 flow [2024-06-27 21:01:35,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:35,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:35,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:35,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:01:35,829 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:35,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1119491122, now seen corresponding path program 2 times [2024-06-27 21:01:35,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:35,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443506658] [2024-06-27 21:01:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:35,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:38,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:38,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443506658] [2024-06-27 21:01:38,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443506658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:38,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:38,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:38,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611969222] [2024-06-27 21:01:38,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:38,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:38,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:38,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:38,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:39,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:39,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 162 transitions, 1994 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:39,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:39,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:39,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:40,413 INFO L124 PetriNetUnfolderBase]: 2168/3320 cut-off events. [2024-06-27 21:01:40,414 INFO L125 PetriNetUnfolderBase]: For 52237/52240 co-relation queries the response was YES. [2024-06-27 21:01:40,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20526 conditions, 3320 events. 2168/3320 cut-off events. For 52237/52240 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16979 event pairs, 607 based on Foata normal form. 6/3322 useless extension candidates. Maximal degree in co-relation 20467. Up to 3063 conditions per place. [2024-06-27 21:01:40,437 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 29 changer transitions 0/202 dead transitions. [2024-06-27 21:01:40,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 202 transitions, 2534 flow [2024-06-27 21:01:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:40,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:01:40,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:01:40,439 INFO L175 Difference]: Start difference. First operand has 124 places, 162 transitions, 1994 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:01:40,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 202 transitions, 2534 flow [2024-06-27 21:01:40,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 202 transitions, 2422 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:40,507 INFO L231 Difference]: Finished difference. Result has 128 places, 164 transitions, 2003 flow [2024-06-27 21:01:40,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2003, PETRI_PLACES=128, PETRI_TRANSITIONS=164} [2024-06-27 21:01:40,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-27 21:01:40,507 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 164 transitions, 2003 flow [2024-06-27 21:01:40,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:40,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:40,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:40,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:01:40,508 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:40,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:40,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1004199952, now seen corresponding path program 3 times [2024-06-27 21:01:40,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:40,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147649944] [2024-06-27 21:01:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:40,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:43,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147649944] [2024-06-27 21:01:43,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147649944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:43,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:43,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:43,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026903126] [2024-06-27 21:01:43,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:43,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:43,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:43,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:43,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:43,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 164 transitions, 2003 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:43,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:43,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:43,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:44,847 INFO L124 PetriNetUnfolderBase]: 2188/3352 cut-off events. [2024-06-27 21:01:44,847 INFO L125 PetriNetUnfolderBase]: For 55339/55342 co-relation queries the response was YES. [2024-06-27 21:01:44,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20680 conditions, 3352 events. 2188/3352 cut-off events. For 55339/55342 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17167 event pairs, 607 based on Foata normal form. 6/3354 useless extension candidates. Maximal degree in co-relation 20619. Up to 3136 conditions per place. [2024-06-27 21:01:44,870 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 21 changer transitions 0/200 dead transitions. [2024-06-27 21:01:44,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 200 transitions, 2515 flow [2024-06-27 21:01:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:01:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:01:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:01:44,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 21:01:44,871 INFO L175 Difference]: Start difference. First operand has 128 places, 164 transitions, 2003 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:01:44,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 200 transitions, 2515 flow [2024-06-27 21:01:44,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 200 transitions, 2434 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:44,930 INFO L231 Difference]: Finished difference. Result has 130 places, 166 transitions, 2013 flow [2024-06-27 21:01:44,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2013, PETRI_PLACES=130, PETRI_TRANSITIONS=166} [2024-06-27 21:01:44,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-27 21:01:44,931 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 166 transitions, 2013 flow [2024-06-27 21:01:44,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:44,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:44,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:44,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:01:44,932 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:44,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:44,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1004015254, now seen corresponding path program 1 times [2024-06-27 21:01:44,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:44,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490484519] [2024-06-27 21:01:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:44,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:48,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:48,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490484519] [2024-06-27 21:01:48,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490484519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:48,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:48,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:48,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104528652] [2024-06-27 21:01:48,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:48,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:48,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:48,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:48,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:48,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:48,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 166 transitions, 2013 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:48,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:48,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:48,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:49,773 INFO L124 PetriNetUnfolderBase]: 2268/3438 cut-off events. [2024-06-27 21:01:49,773 INFO L125 PetriNetUnfolderBase]: For 62883/62886 co-relation queries the response was YES. [2024-06-27 21:01:49,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21231 conditions, 3438 events. 2268/3438 cut-off events. For 62883/62886 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17381 event pairs, 535 based on Foata normal form. 18/3452 useless extension candidates. Maximal degree in co-relation 21169. Up to 2993 conditions per place. [2024-06-27 21:01:49,797 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 178 selfloop transitions, 39 changer transitions 0/221 dead transitions. [2024-06-27 21:01:49,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 221 transitions, 2707 flow [2024-06-27 21:01:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 21:01:49,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-27 21:01:49,799 INFO L175 Difference]: Start difference. First operand has 130 places, 166 transitions, 2013 flow. Second operand 10 states and 179 transitions. [2024-06-27 21:01:49,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 221 transitions, 2707 flow [2024-06-27 21:01:49,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 221 transitions, 2638 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:49,859 INFO L231 Difference]: Finished difference. Result has 134 places, 168 transitions, 2074 flow [2024-06-27 21:01:49,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2074, PETRI_PLACES=134, PETRI_TRANSITIONS=168} [2024-06-27 21:01:49,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-27 21:01:49,860 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 168 transitions, 2074 flow [2024-06-27 21:01:49,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:49,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:49,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:49,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:01:49,860 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:49,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:49,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1048013766, now seen corresponding path program 4 times [2024-06-27 21:01:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:49,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162316456] [2024-06-27 21:01:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:49,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:52,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:52,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162316456] [2024-06-27 21:01:52,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162316456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:52,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:52,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:01:52,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429305883] [2024-06-27 21:01:52,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:52,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:01:52,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:52,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:01:52,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:01:52,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:52,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 168 transitions, 2074 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:52,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:52,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:52,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:53,907 INFO L124 PetriNetUnfolderBase]: 2260/3468 cut-off events. [2024-06-27 21:01:53,907 INFO L125 PetriNetUnfolderBase]: For 63885/63888 co-relation queries the response was YES. [2024-06-27 21:01:53,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21618 conditions, 3468 events. 2260/3468 cut-off events. For 63885/63888 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17941 event pairs, 511 based on Foata normal form. 6/3470 useless extension candidates. Maximal degree in co-relation 21555. Up to 3162 conditions per place. [2024-06-27 21:01:53,934 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 30 changer transitions 0/201 dead transitions. [2024-06-27 21:01:53,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 201 transitions, 2548 flow [2024-06-27 21:01:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:01:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:01:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:01:53,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:01:53,936 INFO L175 Difference]: Start difference. First operand has 134 places, 168 transitions, 2074 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:01:53,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 201 transitions, 2548 flow [2024-06-27 21:01:54,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 201 transitions, 2422 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 21:01:54,008 INFO L231 Difference]: Finished difference. Result has 133 places, 168 transitions, 2021 flow [2024-06-27 21:01:54,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2021, PETRI_PLACES=133, PETRI_TRANSITIONS=168} [2024-06-27 21:01:54,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-27 21:01:54,009 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 168 transitions, 2021 flow [2024-06-27 21:01:54,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:54,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:54,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:54,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:01:54,009 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:54,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:54,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1041572958, now seen corresponding path program 2 times [2024-06-27 21:01:54,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:54,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606347591] [2024-06-27 21:01:54,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:54,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:57,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:57,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606347591] [2024-06-27 21:01:57,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606347591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:57,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:57,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:57,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108191266] [2024-06-27 21:01:57,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:57,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:57,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:57,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:57,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:57,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:01:57,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 168 transitions, 2021 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:57,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:57,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:01:57,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:58,596 INFO L124 PetriNetUnfolderBase]: 2324/3582 cut-off events. [2024-06-27 21:01:58,596 INFO L125 PetriNetUnfolderBase]: For 71543/71586 co-relation queries the response was YES. [2024-06-27 21:01:58,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21961 conditions, 3582 events. 2324/3582 cut-off events. For 71543/71586 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18673 event pairs, 448 based on Foata normal form. 44/3618 useless extension candidates. Maximal degree in co-relation 21897. Up to 2909 conditions per place. [2024-06-27 21:01:58,623 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 155 selfloop transitions, 50 changer transitions 0/209 dead transitions. [2024-06-27 21:01:58,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 209 transitions, 2679 flow [2024-06-27 21:01:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:01:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:01:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 21:01:58,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-27 21:01:58,624 INFO L175 Difference]: Start difference. First operand has 133 places, 168 transitions, 2021 flow. Second operand 7 states and 134 transitions. [2024-06-27 21:01:58,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 209 transitions, 2679 flow [2024-06-27 21:01:58,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 209 transitions, 2604 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:01:58,731 INFO L231 Difference]: Finished difference. Result has 134 places, 170 transitions, 2104 flow [2024-06-27 21:01:58,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2104, PETRI_PLACES=134, PETRI_TRANSITIONS=170} [2024-06-27 21:01:58,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-27 21:01:58,732 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 170 transitions, 2104 flow [2024-06-27 21:01:58,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:58,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:58,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:58,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:01:58,733 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:58,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:58,733 INFO L85 PathProgramCache]: Analyzing trace with hash -562246042, now seen corresponding path program 3 times [2024-06-27 21:01:58,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:58,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116392156] [2024-06-27 21:01:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:58,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:01,678 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 21:02:01,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:01,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116392156] [2024-06-27 21:02:01,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116392156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:01,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:01,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:01,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83905052] [2024-06-27 21:02:01,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:01,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:01,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:01,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:01,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:01,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:01,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 170 transitions, 2104 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:01,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:01,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:01,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:03,007 INFO L124 PetriNetUnfolderBase]: 2460/3790 cut-off events. [2024-06-27 21:02:03,007 INFO L125 PetriNetUnfolderBase]: For 77645/77688 co-relation queries the response was YES. [2024-06-27 21:02:03,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23514 conditions, 3790 events. 2460/3790 cut-off events. For 77645/77688 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20041 event pairs, 434 based on Foata normal form. 44/3826 useless extension candidates. Maximal degree in co-relation 23449. Up to 2717 conditions per place. [2024-06-27 21:02:03,081 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 57 changer transitions 0/219 dead transitions. [2024-06-27 21:02:03,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 219 transitions, 2950 flow [2024-06-27 21:02:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:02:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:02:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 21:02:03,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-27 21:02:03,083 INFO L175 Difference]: Start difference. First operand has 134 places, 170 transitions, 2104 flow. Second operand 7 states and 139 transitions. [2024-06-27 21:02:03,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 219 transitions, 2950 flow [2024-06-27 21:02:03,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 219 transitions, 2820 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:02:03,160 INFO L231 Difference]: Finished difference. Result has 136 places, 174 transitions, 2191 flow [2024-06-27 21:02:03,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2191, PETRI_PLACES=136, PETRI_TRANSITIONS=174} [2024-06-27 21:02:03,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-27 21:02:03,160 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 174 transitions, 2191 flow [2024-06-27 21:02:03,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:03,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:03,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:03,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:02:03,161 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 21:02:03,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash -798718072, now seen corresponding path program 4 times [2024-06-27 21:02:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:03,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756035285] [2024-06-27 21:02:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:03,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:06,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:06,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756035285] [2024-06-27 21:02:06,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756035285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:06,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:06,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:06,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911697432] [2024-06-27 21:02:06,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:06,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:06,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:06,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:06,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 174 transitions, 2191 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:06,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:06,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:06,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:07,483 INFO L124 PetriNetUnfolderBase]: 2512/3818 cut-off events. [2024-06-27 21:02:07,483 INFO L125 PetriNetUnfolderBase]: For 82634/82637 co-relation queries the response was YES. [2024-06-27 21:02:07,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24075 conditions, 3818 events. 2512/3818 cut-off events. For 82634/82637 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19813 event pairs, 598 based on Foata normal form. 18/3832 useless extension candidates. Maximal degree in co-relation 24009. Up to 3279 conditions per place. [2024-06-27 21:02:07,507 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 41 changer transitions 0/215 dead transitions. [2024-06-27 21:02:07,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 215 transitions, 2781 flow [2024-06-27 21:02:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:07,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:02:07,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:02:07,508 INFO L175 Difference]: Start difference. First operand has 136 places, 174 transitions, 2191 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:02:07,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 215 transitions, 2781 flow [2024-06-27 21:02:07,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 215 transitions, 2677 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 21:02:07,593 INFO L231 Difference]: Finished difference. Result has 141 places, 175 transitions, 2197 flow [2024-06-27 21:02:07,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2197, PETRI_PLACES=141, PETRI_TRANSITIONS=175} [2024-06-27 21:02:07,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-27 21:02:07,593 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 175 transitions, 2197 flow [2024-06-27 21:02:07,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:07,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:07,594 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 21:02:07,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:02:07,594 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 21:02:07,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash -116755153, now seen corresponding path program 1 times [2024-06-27 21:02:07,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:07,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163552786] [2024-06-27 21:02:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:07,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:10,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:10,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163552786] [2024-06-27 21:02:10,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163552786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:10,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:10,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:10,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461763317] [2024-06-27 21:02:10,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:10,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:10,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:10,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:10,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 175 transitions, 2197 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:10,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:10,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:10,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:12,248 INFO L124 PetriNetUnfolderBase]: 3439/5401 cut-off events. [2024-06-27 21:02:12,248 INFO L125 PetriNetUnfolderBase]: For 144059/144062 co-relation queries the response was YES. [2024-06-27 21:02:12,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33533 conditions, 5401 events. 3439/5401 cut-off events. For 144059/144062 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31294 event pairs, 897 based on Foata normal form. 58/5455 useless extension candidates. Maximal degree in co-relation 33465. Up to 2381 conditions per place. [2024-06-27 21:02:12,283 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 181 selfloop transitions, 80 changer transitions 0/265 dead transitions. [2024-06-27 21:02:12,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 265 transitions, 3359 flow [2024-06-27 21:02:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:02:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:02:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 21:02:12,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002217294900224 [2024-06-27 21:02:12,285 INFO L175 Difference]: Start difference. First operand has 141 places, 175 transitions, 2197 flow. Second operand 11 states and 221 transitions. [2024-06-27 21:02:12,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 265 transitions, 3359 flow [2024-06-27 21:02:12,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 265 transitions, 3259 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:02:12,402 INFO L231 Difference]: Finished difference. Result has 148 places, 178 transitions, 2383 flow [2024-06-27 21:02:12,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2383, PETRI_PLACES=148, PETRI_TRANSITIONS=178} [2024-06-27 21:02:12,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-27 21:02:12,402 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 178 transitions, 2383 flow [2024-06-27 21:02:12,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:12,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:12,403 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 21:02:12,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:02:12,403 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 21:02:12,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash 29197127, now seen corresponding path program 2 times [2024-06-27 21:02:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:12,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500831487] [2024-06-27 21:02:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:15,286 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 21:02:15,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:15,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500831487] [2024-06-27 21:02:15,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500831487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:15,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:15,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:15,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042690067] [2024-06-27 21:02:15,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:15,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:15,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:15,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:15,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:15,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 178 transitions, 2383 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:15,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:15,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:15,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:17,590 INFO L124 PetriNetUnfolderBase]: 4088/6460 cut-off events. [2024-06-27 21:02:17,590 INFO L125 PetriNetUnfolderBase]: For 192367/192370 co-relation queries the response was YES. [2024-06-27 21:02:17,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40613 conditions, 6460 events. 4088/6460 cut-off events. For 192367/192370 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39516 event pairs, 1358 based on Foata normal form. 58/6514 useless extension candidates. Maximal degree in co-relation 40542. Up to 4336 conditions per place. [2024-06-27 21:02:17,638 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 181 selfloop transitions, 80 changer transitions 0/265 dead transitions. [2024-06-27 21:02:17,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 265 transitions, 3505 flow [2024-06-27 21:02:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:02:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:02:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-27 21:02:17,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-27 21:02:17,640 INFO L175 Difference]: Start difference. First operand has 148 places, 178 transitions, 2383 flow. Second operand 12 states and 232 transitions. [2024-06-27 21:02:17,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 265 transitions, 3505 flow [2024-06-27 21:02:17,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 265 transitions, 3345 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 21:02:17,839 INFO L231 Difference]: Finished difference. Result has 154 places, 180 transitions, 2466 flow [2024-06-27 21:02:17,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2466, PETRI_PLACES=154, PETRI_TRANSITIONS=180} [2024-06-27 21:02:17,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-27 21:02:17,840 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 180 transitions, 2466 flow [2024-06-27 21:02:17,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:17,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:17,840 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 21:02:17,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:02:17,841 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:17,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:17,841 INFO L85 PathProgramCache]: Analyzing trace with hash -28041523, now seen corresponding path program 3 times [2024-06-27 21:02:17,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:17,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553545465] [2024-06-27 21:02:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:17,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:21,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:21,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553545465] [2024-06-27 21:02:21,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553545465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:21,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:21,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:21,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230605131] [2024-06-27 21:02:21,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:21,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:21,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:21,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:21,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:21,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:21,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 180 transitions, 2466 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:21,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:21,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:21,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:23,458 INFO L124 PetriNetUnfolderBase]: 4240/6724 cut-off events. [2024-06-27 21:02:23,458 INFO L125 PetriNetUnfolderBase]: For 199546/199549 co-relation queries the response was YES. [2024-06-27 21:02:23,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41380 conditions, 6724 events. 4240/6724 cut-off events. For 199546/199549 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 41684 event pairs, 1611 based on Foata normal form. 66/6786 useless extension candidates. Maximal degree in co-relation 41307. Up to 5282 conditions per place. [2024-06-27 21:02:23,506 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 169 selfloop transitions, 80 changer transitions 0/253 dead transitions. [2024-06-27 21:02:23,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 253 transitions, 3358 flow [2024-06-27 21:02:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:02:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:02:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 221 transitions. [2024-06-27 21:02:23,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491869918699187 [2024-06-27 21:02:23,508 INFO L175 Difference]: Start difference. First operand has 154 places, 180 transitions, 2466 flow. Second operand 12 states and 221 transitions. [2024-06-27 21:02:23,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 253 transitions, 3358 flow [2024-06-27 21:02:23,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 253 transitions, 3167 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 21:02:23,695 INFO L231 Difference]: Finished difference. Result has 157 places, 181 transitions, 2487 flow [2024-06-27 21:02:23,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2275, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2487, PETRI_PLACES=157, PETRI_TRANSITIONS=181} [2024-06-27 21:02:23,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-27 21:02:23,695 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 181 transitions, 2487 flow [2024-06-27 21:02:23,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:23,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:23,696 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 21:02:23,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:02:23,696 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 21:02:23,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:23,696 INFO L85 PathProgramCache]: Analyzing trace with hash -748982549, now seen corresponding path program 4 times [2024-06-27 21:02:23,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:23,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851103780] [2024-06-27 21:02:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:23,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:27,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:27,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851103780] [2024-06-27 21:02:27,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851103780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:27,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:27,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:27,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827008781] [2024-06-27 21:02:27,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:27,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:27,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:27,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:27,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:27,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:27,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 181 transitions, 2487 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:27,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:27,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:27,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:29,814 INFO L124 PetriNetUnfolderBase]: 4516/7177 cut-off events. [2024-06-27 21:02:29,814 INFO L125 PetriNetUnfolderBase]: For 211990/211993 co-relation queries the response was YES. [2024-06-27 21:02:29,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43353 conditions, 7177 events. 4516/7177 cut-off events. For 211990/211993 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 45305 event pairs, 1799 based on Foata normal form. 66/7239 useless extension candidates. Maximal degree in co-relation 43279. Up to 6020 conditions per place. [2024-06-27 21:02:29,858 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 188 selfloop transitions, 57 changer transitions 0/249 dead transitions. [2024-06-27 21:02:29,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 249 transitions, 3367 flow [2024-06-27 21:02:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:02:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:02:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-27 21:02:29,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 21:02:29,860 INFO L175 Difference]: Start difference. First operand has 157 places, 181 transitions, 2487 flow. Second operand 11 states and 205 transitions. [2024-06-27 21:02:29,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 249 transitions, 3367 flow [2024-06-27 21:02:30,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 249 transitions, 3177 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-27 21:02:30,045 INFO L231 Difference]: Finished difference. Result has 158 places, 182 transitions, 2468 flow [2024-06-27 21:02:30,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2468, PETRI_PLACES=158, PETRI_TRANSITIONS=182} [2024-06-27 21:02:30,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-27 21:02:30,046 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 182 transitions, 2468 flow [2024-06-27 21:02:30,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:30,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:30,046 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 21:02:30,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:02:30,046 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:30,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:30,047 INFO L85 PathProgramCache]: Analyzing trace with hash -743620169, now seen corresponding path program 5 times [2024-06-27 21:02:30,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:30,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651078503] [2024-06-27 21:02:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:30,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:33,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:33,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651078503] [2024-06-27 21:02:33,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651078503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:33,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:33,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:33,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838597623] [2024-06-27 21:02:33,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:33,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:33,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:33,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:33,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:33,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:33,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 182 transitions, 2468 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:33,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:33,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:33,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:36,151 INFO L124 PetriNetUnfolderBase]: 4792/7645 cut-off events. [2024-06-27 21:02:36,152 INFO L125 PetriNetUnfolderBase]: For 228557/228560 co-relation queries the response was YES. [2024-06-27 21:02:36,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45151 conditions, 7645 events. 4792/7645 cut-off events. For 228557/228560 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 49159 event pairs, 1912 based on Foata normal form. 66/7707 useless extension candidates. Maximal degree in co-relation 45076. Up to 6488 conditions per place. [2024-06-27 21:02:36,211 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 195 selfloop transitions, 61 changer transitions 0/260 dead transitions. [2024-06-27 21:02:36,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 260 transitions, 3400 flow [2024-06-27 21:02:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:02:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:02:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 236 transitions. [2024-06-27 21:02:36,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4427767354596623 [2024-06-27 21:02:36,213 INFO L175 Difference]: Start difference. First operand has 158 places, 182 transitions, 2468 flow. Second operand 13 states and 236 transitions. [2024-06-27 21:02:36,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 260 transitions, 3400 flow [2024-06-27 21:02:36,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 3257 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 21:02:36,406 INFO L231 Difference]: Finished difference. Result has 162 places, 183 transitions, 2506 flow [2024-06-27 21:02:36,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2506, PETRI_PLACES=162, PETRI_TRANSITIONS=183} [2024-06-27 21:02:36,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-27 21:02:36,407 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 183 transitions, 2506 flow [2024-06-27 21:02:36,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:36,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:36,407 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 21:02:36,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:02:36,408 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:36,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:36,408 INFO L85 PathProgramCache]: Analyzing trace with hash -749130419, now seen corresponding path program 6 times [2024-06-27 21:02:36,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:36,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653451887] [2024-06-27 21:02:36,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:36,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:39,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:39,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653451887] [2024-06-27 21:02:39,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653451887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:39,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:39,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883855762] [2024-06-27 21:02:39,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:39,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:39,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:39,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:39,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 183 transitions, 2506 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:39,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:39,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:39,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:41,885 INFO L124 PetriNetUnfolderBase]: 5317/8500 cut-off events. [2024-06-27 21:02:41,886 INFO L125 PetriNetUnfolderBase]: For 262921/262924 co-relation queries the response was YES. [2024-06-27 21:02:41,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50170 conditions, 8500 events. 5317/8500 cut-off events. For 262921/262924 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55926 event pairs, 2050 based on Foata normal form. 58/8554 useless extension candidates. Maximal degree in co-relation 50094. Up to 5854 conditions per place. [2024-06-27 21:02:41,940 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 200 selfloop transitions, 55 changer transitions 0/259 dead transitions. [2024-06-27 21:02:41,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 259 transitions, 3544 flow [2024-06-27 21:02:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:02:41,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:02:41,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 21:02:41,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656319290465632 [2024-06-27 21:02:41,943 INFO L175 Difference]: Start difference. First operand has 162 places, 183 transitions, 2506 flow. Second operand 11 states and 210 transitions. [2024-06-27 21:02:41,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 259 transitions, 3544 flow [2024-06-27 21:02:42,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 259 transitions, 3391 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-27 21:02:42,154 INFO L231 Difference]: Finished difference. Result has 163 places, 185 transitions, 2567 flow [2024-06-27 21:02:42,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2353, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2567, PETRI_PLACES=163, PETRI_TRANSITIONS=185} [2024-06-27 21:02:42,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-27 21:02:42,155 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 185 transitions, 2567 flow [2024-06-27 21:02:42,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:42,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:42,155 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 21:02:42,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:02:42,155 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:42,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:42,155 INFO L85 PathProgramCache]: Analyzing trace with hash -743404967, now seen corresponding path program 1 times [2024-06-27 21:02:42,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:42,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297588675] [2024-06-27 21:02:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:42,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:45,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:45,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297588675] [2024-06-27 21:02:45,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297588675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:45,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:45,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:02:45,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587011528] [2024-06-27 21:02:45,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:45,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:02:45,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:02:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:02:45,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:45,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 185 transitions, 2567 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:45,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:45,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:45,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:48,438 INFO L124 PetriNetUnfolderBase]: 5509/8884 cut-off events. [2024-06-27 21:02:48,438 INFO L125 PetriNetUnfolderBase]: For 281419/281422 co-relation queries the response was YES. [2024-06-27 21:02:48,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51836 conditions, 8884 events. 5509/8884 cut-off events. For 281419/281422 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 59746 event pairs, 2179 based on Foata normal form. 50/8930 useless extension candidates. Maximal degree in co-relation 51758. Up to 6687 conditions per place. [2024-06-27 21:02:48,517 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 200 selfloop transitions, 65 changer transitions 0/269 dead transitions. [2024-06-27 21:02:48,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 269 transitions, 3569 flow [2024-06-27 21:02:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:02:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:02:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 240 transitions. [2024-06-27 21:02:48,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450281425891182 [2024-06-27 21:02:48,518 INFO L175 Difference]: Start difference. First operand has 163 places, 185 transitions, 2567 flow. Second operand 13 states and 240 transitions. [2024-06-27 21:02:48,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 269 transitions, 3569 flow [2024-06-27 21:02:48,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 269 transitions, 3429 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 21:02:48,980 INFO L231 Difference]: Finished difference. Result has 168 places, 186 transitions, 2615 flow [2024-06-27 21:02:48,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2615, PETRI_PLACES=168, PETRI_TRANSITIONS=186} [2024-06-27 21:02:48,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-27 21:02:48,980 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 186 transitions, 2615 flow [2024-06-27 21:02:48,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:48,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:48,980 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 21:02:48,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:02:48,981 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:48,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:48,981 INFO L85 PathProgramCache]: Analyzing trace with hash 394034875, now seen corresponding path program 1 times [2024-06-27 21:02:48,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:48,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554206402] [2024-06-27 21:02:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:50,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:50,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554206402] [2024-06-27 21:02:50,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554206402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:50,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:50,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:02:50,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034202314] [2024-06-27 21:02:50,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:50,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:02:50,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:50,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:02:50,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:02:50,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:02:50,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 186 transitions, 2615 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:50,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:50,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:02:50,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:52,731 INFO L124 PetriNetUnfolderBase]: 5195/8343 cut-off events. [2024-06-27 21:02:52,732 INFO L125 PetriNetUnfolderBase]: For 262967/262969 co-relation queries the response was YES. [2024-06-27 21:02:52,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48839 conditions, 8343 events. 5195/8343 cut-off events. For 262967/262969 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 55305 event pairs, 2401 based on Foata normal form. 15/8335 useless extension candidates. Maximal degree in co-relation 48760. Up to 7967 conditions per place. [2024-06-27 21:02:52,803 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 160 selfloop transitions, 31 changer transitions 10/214 dead transitions. [2024-06-27 21:02:52,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 214 transitions, 3083 flow [2024-06-27 21:02:52,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:02:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:02:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 21:02:52,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-27 21:02:52,804 INFO L175 Difference]: Start difference. First operand has 168 places, 186 transitions, 2615 flow. Second operand 7 states and 125 transitions. [2024-06-27 21:02:52,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 214 transitions, 3083 flow [2024-06-27 21:02:53,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 214 transitions, 2893 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-06-27 21:02:53,102 INFO L231 Difference]: Finished difference. Result has 164 places, 176 transitions, 2315 flow [2024-06-27 21:02:53,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2425, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2315, PETRI_PLACES=164, PETRI_TRANSITIONS=176} [2024-06-27 21:02:53,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-27 21:02:53,103 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 176 transitions, 2315 flow [2024-06-27 21:02:53,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:53,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:53,103 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 21:02:53,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:02:53,103 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:53,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash 290165099, now seen corresponding path program 7 times [2024-06-27 21:02:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:53,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909873746] [2024-06-27 21:02:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:53,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:56,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:56,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909873746] [2024-06-27 21:02:56,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909873746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:56,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:56,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:56,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606243301] [2024-06-27 21:02:56,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:56,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:56,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:56,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:56,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:56,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:02:56,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 176 transitions, 2315 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:56,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:56,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:02:56,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:58,743 INFO L124 PetriNetUnfolderBase]: 5089/8171 cut-off events. [2024-06-27 21:02:58,744 INFO L125 PetriNetUnfolderBase]: For 298162/298205 co-relation queries the response was YES. [2024-06-27 21:02:58,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47651 conditions, 8171 events. 5089/8171 cut-off events. For 298162/298205 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 53897 event pairs, 1935 based on Foata normal form. 92/8255 useless extension candidates. Maximal degree in co-relation 47571. Up to 6747 conditions per place. [2024-06-27 21:02:58,798 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 146 selfloop transitions, 90 changer transitions 5/245 dead transitions. [2024-06-27 21:02:58,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 245 transitions, 3303 flow [2024-06-27 21:02:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:02:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:02:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 21:02:58,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48048780487804876 [2024-06-27 21:02:58,800 INFO L175 Difference]: Start difference. First operand has 164 places, 176 transitions, 2315 flow. Second operand 10 states and 197 transitions. [2024-06-27 21:02:58,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 245 transitions, 3303 flow [2024-06-27 21:02:59,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 245 transitions, 3213 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:02:59,043 INFO L231 Difference]: Finished difference. Result has 167 places, 176 transitions, 2461 flow [2024-06-27 21:02:59,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2461, PETRI_PLACES=167, PETRI_TRANSITIONS=176} [2024-06-27 21:02:59,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-27 21:02:59,043 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 176 transitions, 2461 flow [2024-06-27 21:02:59,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:59,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:59,044 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 21:02:59,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:02:59,044 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:59,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:59,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1871461611, now seen corresponding path program 8 times [2024-06-27 21:02:59,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:59,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238741515] [2024-06-27 21:02:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:59,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:02,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238741515] [2024-06-27 21:03:02,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238741515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:02,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:02,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:02,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651012235] [2024-06-27 21:03:02,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:02,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:02,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:02,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:02,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:02,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:02,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 176 transitions, 2461 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:02,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:02,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:02,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:04,442 INFO L124 PetriNetUnfolderBase]: 5533/8929 cut-off events. [2024-06-27 21:03:04,442 INFO L125 PetriNetUnfolderBase]: For 326708/326711 co-relation queries the response was YES. [2024-06-27 21:03:04,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51518 conditions, 8929 events. 5533/8929 cut-off events. For 326708/326711 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 60346 event pairs, 2405 based on Foata normal form. 66/8991 useless extension candidates. Maximal degree in co-relation 51437. Up to 7310 conditions per place. [2024-06-27 21:03:04,513 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 175 selfloop transitions, 60 changer transitions 0/239 dead transitions. [2024-06-27 21:03:04,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 239 transitions, 3221 flow [2024-06-27 21:03:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:04,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 21:03:04,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:03:04,515 INFO L175 Difference]: Start difference. First operand has 167 places, 176 transitions, 2461 flow. Second operand 10 states and 190 transitions. [2024-06-27 21:03:04,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 239 transitions, 3221 flow [2024-06-27 21:03:04,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 239 transitions, 3000 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 21:03:04,800 INFO L231 Difference]: Finished difference. Result has 169 places, 177 transitions, 2428 flow [2024-06-27 21:03:04,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=159, 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=10, PETRI_FLOW=2428, PETRI_PLACES=169, PETRI_TRANSITIONS=177} [2024-06-27 21:03:04,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-27 21:03:04,801 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 177 transitions, 2428 flow [2024-06-27 21:03:04,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:04,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:04,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:04,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:03:04,801 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 21:03:04,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:04,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1003820025, now seen corresponding path program 9 times [2024-06-27 21:03:04,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:04,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770202215] [2024-06-27 21:03:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:04,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:07,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:07,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770202215] [2024-06-27 21:03:07,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770202215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:07,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:07,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:07,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457404701] [2024-06-27 21:03:07,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:07,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:07,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:07,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:07,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:07,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:07,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 177 transitions, 2428 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:07,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:07,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:07,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:10,230 INFO L124 PetriNetUnfolderBase]: 5992/9706 cut-off events. [2024-06-27 21:03:10,231 INFO L125 PetriNetUnfolderBase]: For 342680/342683 co-relation queries the response was YES. [2024-06-27 21:03:10,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54570 conditions, 9706 events. 5992/9706 cut-off events. For 342680/342683 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 66799 event pairs, 2210 based on Foata normal form. 58/9760 useless extension candidates. Maximal degree in co-relation 54488. Up to 5681 conditions per place. [2024-06-27 21:03:10,315 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 185 selfloop transitions, 62 changer transitions 0/251 dead transitions. [2024-06-27 21:03:10,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 251 transitions, 3488 flow [2024-06-27 21:03:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 21:03:10,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48048780487804876 [2024-06-27 21:03:10,317 INFO L175 Difference]: Start difference. First operand has 169 places, 177 transitions, 2428 flow. Second operand 10 states and 197 transitions. [2024-06-27 21:03:10,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 251 transitions, 3488 flow [2024-06-27 21:03:10,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 251 transitions, 3332 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 21:03:10,753 INFO L231 Difference]: Finished difference. Result has 172 places, 180 transitions, 2536 flow [2024-06-27 21:03:10,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2536, PETRI_PLACES=172, PETRI_TRANSITIONS=180} [2024-06-27 21:03:10,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-27 21:03:10,753 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 180 transitions, 2536 flow [2024-06-27 21:03:10,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:10,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:10,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:10,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:03:10,754 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 21:03:10,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:10,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1009330275, now seen corresponding path program 10 times [2024-06-27 21:03:10,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:10,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088229581] [2024-06-27 21:03:10,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:10,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:13,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:13,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088229581] [2024-06-27 21:03:13,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088229581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:13,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:13,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:13,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252027093] [2024-06-27 21:03:13,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:13,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:13,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:13,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:13,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:13,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:13,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 180 transitions, 2536 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:13,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:13,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:13,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:16,559 INFO L124 PetriNetUnfolderBase]: 6096/9878 cut-off events. [2024-06-27 21:03:16,560 INFO L125 PetriNetUnfolderBase]: For 356485/356488 co-relation queries the response was YES. [2024-06-27 21:03:16,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54602 conditions, 9878 events. 6096/9878 cut-off events. For 356485/356488 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 68452 event pairs, 2805 based on Foata normal form. 66/9940 useless extension candidates. Maximal degree in co-relation 54518. Up to 8703 conditions per place. [2024-06-27 21:03:16,634 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 168 selfloop transitions, 62 changer transitions 5/239 dead transitions. [2024-06-27 21:03:16,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 239 transitions, 3294 flow [2024-06-27 21:03:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 21:03:16,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 21:03:16,636 INFO L175 Difference]: Start difference. First operand has 172 places, 180 transitions, 2536 flow. Second operand 10 states and 185 transitions. [2024-06-27 21:03:16,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 239 transitions, 3294 flow [2024-06-27 21:03:17,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 239 transitions, 3108 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 21:03:17,146 INFO L231 Difference]: Finished difference. Result has 174 places, 180 transitions, 2528 flow [2024-06-27 21:03:17,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2350, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2528, PETRI_PLACES=174, PETRI_TRANSITIONS=180} [2024-06-27 21:03:17,146 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-27 21:03:17,146 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 180 transitions, 2528 flow [2024-06-27 21:03:17,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:17,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:17,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:17,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:03:17,147 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 21:03:17,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:17,147 INFO L85 PathProgramCache]: Analyzing trace with hash -515453465, now seen corresponding path program 2 times [2024-06-27 21:03:17,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:17,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798925091] [2024-06-27 21:03:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:17,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:20,725 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 21:03:20,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:20,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798925091] [2024-06-27 21:03:20,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798925091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:20,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:20,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:03:20,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663243033] [2024-06-27 21:03:20,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:20,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:03:20,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:03:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:03:20,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:20,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 180 transitions, 2528 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:20,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:20,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:20,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:23,318 INFO L124 PetriNetUnfolderBase]: 6232/10152 cut-off events. [2024-06-27 21:03:23,318 INFO L125 PetriNetUnfolderBase]: For 354357/354400 co-relation queries the response was YES. [2024-06-27 21:03:23,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55375 conditions, 10152 events. 6232/10152 cut-off events. For 354357/354400 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 71141 event pairs, 2420 based on Foata normal form. 76/10220 useless extension candidates. Maximal degree in co-relation 55290. Up to 8358 conditions per place. [2024-06-27 21:03:23,396 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 156 selfloop transitions, 91 changer transitions 11/262 dead transitions. [2024-06-27 21:03:23,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 262 transitions, 3642 flow [2024-06-27 21:03:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:03:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:03:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-27 21:03:23,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48337028824833705 [2024-06-27 21:03:23,398 INFO L175 Difference]: Start difference. First operand has 174 places, 180 transitions, 2528 flow. Second operand 11 states and 218 transitions. [2024-06-27 21:03:23,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 262 transitions, 3642 flow [2024-06-27 21:03:23,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 262 transitions, 3460 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 21:03:23,826 INFO L231 Difference]: Finished difference. Result has 177 places, 180 transitions, 2595 flow [2024-06-27 21:03:23,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2356, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2595, PETRI_PLACES=177, PETRI_TRANSITIONS=180} [2024-06-27 21:03:23,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-27 21:03:23,826 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 180 transitions, 2595 flow [2024-06-27 21:03:23,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:23,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:23,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:23,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:03:23,827 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 21:03:23,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:23,827 INFO L85 PathProgramCache]: Analyzing trace with hash -249756185, now seen corresponding path program 3 times [2024-06-27 21:03:23,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:23,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27814351] [2024-06-27 21:03:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:23,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:27,332 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 21:03:27,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:27,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27814351] [2024-06-27 21:03:27,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27814351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:27,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:27,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:03:27,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130078101] [2024-06-27 21:03:27,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:27,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:03:27,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:03:27,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:03:27,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:27,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 180 transitions, 2595 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:27,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:27,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:27,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:30,326 INFO L124 PetriNetUnfolderBase]: 6560/10720 cut-off events. [2024-06-27 21:03:30,326 INFO L125 PetriNetUnfolderBase]: For 389551/389594 co-relation queries the response was YES. [2024-06-27 21:03:30,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58853 conditions, 10720 events. 6560/10720 cut-off events. For 389551/389594 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 75816 event pairs, 2349 based on Foata normal form. 76/10788 useless extension candidates. Maximal degree in co-relation 58767. Up to 5874 conditions per place. [2024-06-27 21:03:30,422 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 144 selfloop transitions, 100 changer transitions 12/260 dead transitions. [2024-06-27 21:03:30,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 260 transitions, 3789 flow [2024-06-27 21:03:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 21:03:30,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 21:03:30,424 INFO L175 Difference]: Start difference. First operand has 177 places, 180 transitions, 2595 flow. Second operand 10 states and 205 transitions. [2024-06-27 21:03:30,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 260 transitions, 3789 flow [2024-06-27 21:03:30,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 260 transitions, 3559 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-27 21:03:30,914 INFO L231 Difference]: Finished difference. Result has 178 places, 179 transitions, 2610 flow [2024-06-27 21:03:30,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2610, PETRI_PLACES=178, PETRI_TRANSITIONS=179} [2024-06-27 21:03:30,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-27 21:03:30,915 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 179 transitions, 2610 flow [2024-06-27 21:03:30,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:30,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:30,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:30,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:03:30,915 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 21:03:30,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1009545477, now seen corresponding path program 4 times [2024-06-27 21:03:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:30,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185623173] [2024-06-27 21:03:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:30,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:34,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:34,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185623173] [2024-06-27 21:03:34,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185623173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:34,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:34,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:03:34,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718670832] [2024-06-27 21:03:34,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:34,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:03:34,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:34,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:03:34,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:03:34,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:34,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 179 transitions, 2610 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:34,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:34,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:34,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:37,365 INFO L124 PetriNetUnfolderBase]: 6176/10078 cut-off events. [2024-06-27 21:03:37,366 INFO L125 PetriNetUnfolderBase]: For 394338/394341 co-relation queries the response was YES. [2024-06-27 21:03:37,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56430 conditions, 10078 events. 6176/10078 cut-off events. For 394338/394341 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 70792 event pairs, 2691 based on Foata normal form. 50/10124 useless extension candidates. Maximal degree in co-relation 56343. Up to 7443 conditions per place. [2024-06-27 21:03:37,436 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 165 selfloop transitions, 66 changer transitions 7/242 dead transitions. [2024-06-27 21:03:37,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 242 transitions, 3282 flow [2024-06-27 21:03:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:03:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:03:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 21:03:37,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 21:03:37,439 INFO L175 Difference]: Start difference. First operand has 178 places, 179 transitions, 2610 flow. Second operand 10 states and 188 transitions. [2024-06-27 21:03:37,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 242 transitions, 3282 flow [2024-06-27 21:03:37,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 242 transitions, 3017 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 21:03:37,814 INFO L231 Difference]: Finished difference. Result has 179 places, 176 transitions, 2375 flow [2024-06-27 21:03:37,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2375, PETRI_PLACES=179, PETRI_TRANSITIONS=176} [2024-06-27 21:03:37,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-27 21:03:37,815 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 176 transitions, 2375 flow [2024-06-27 21:03:37,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:37,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:37,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:37,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:03:37,815 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:37,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:37,815 INFO L85 PathProgramCache]: Analyzing trace with hash 931869685, now seen corresponding path program 2 times [2024-06-27 21:03:37,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:37,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206745951] [2024-06-27 21:03:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:37,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:39,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206745951] [2024-06-27 21:03:39,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206745951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:39,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:39,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:03:39,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196250227] [2024-06-27 21:03:39,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:39,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:03:39,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:03:39,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:03:39,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:03:39,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 176 transitions, 2375 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:39,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:39,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:03:39,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:41,821 INFO L124 PetriNetUnfolderBase]: 5767/9425 cut-off events. [2024-06-27 21:03:41,821 INFO L125 PetriNetUnfolderBase]: For 371580/371611 co-relation queries the response was YES. [2024-06-27 21:03:41,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53388 conditions, 9425 events. 5767/9425 cut-off events. For 371580/371611 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 65557 event pairs, 2574 based on Foata normal form. 24/9417 useless extension candidates. Maximal degree in co-relation 53301. Up to 8921 conditions per place. [2024-06-27 21:03:41,907 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 143 selfloop transitions, 42 changer transitions 0/198 dead transitions. [2024-06-27 21:03:41,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 198 transitions, 2977 flow [2024-06-27 21:03:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:03:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:03:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:03:41,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-27 21:03:41,909 INFO L175 Difference]: Start difference. First operand has 179 places, 176 transitions, 2375 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:03:41,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 198 transitions, 2977 flow [2024-06-27 21:03:42,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 198 transitions, 2746 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-27 21:03:42,431 INFO L231 Difference]: Finished difference. Result has 175 places, 179 transitions, 2273 flow [2024-06-27 21:03:42,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2273, PETRI_PLACES=175, PETRI_TRANSITIONS=179} [2024-06-27 21:03:42,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-27 21:03:42,431 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 179 transitions, 2273 flow [2024-06-27 21:03:42,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:42,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:42,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:42,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:03:42,432 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:42,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:42,432 INFO L85 PathProgramCache]: Analyzing trace with hash 405476603, now seen corresponding path program 1 times [2024-06-27 21:03:42,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:42,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826576452] [2024-06-27 21:03:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:42,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:44,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:44,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826576452] [2024-06-27 21:03:44,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826576452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:44,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:44,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:44,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618122204] [2024-06-27 21:03:44,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:44,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:44,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:44,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:03:44,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 179 transitions, 2273 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 21:03:44,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:44,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:03:44,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:46,510 INFO L124 PetriNetUnfolderBase]: 5568/9109 cut-off events. [2024-06-27 21:03:46,510 INFO L125 PetriNetUnfolderBase]: For 333291/333293 co-relation queries the response was YES. [2024-06-27 21:03:46,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49826 conditions, 9109 events. 5568/9109 cut-off events. For 333291/333293 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 62680 event pairs, 2633 based on Foata normal form. 16/9102 useless extension candidates. Maximal degree in co-relation 49739. Up to 8785 conditions per place. [2024-06-27 21:03:46,588 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 174 selfloop transitions, 14 changer transitions 0/201 dead transitions. [2024-06-27 21:03:46,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 201 transitions, 2745 flow [2024-06-27 21:03:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:03:46,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:03:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 21:03:46,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-27 21:03:46,589 INFO L175 Difference]: Start difference. First operand has 175 places, 179 transitions, 2273 flow. Second operand 6 states and 103 transitions. [2024-06-27 21:03:46,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 201 transitions, 2745 flow [2024-06-27 21:03:46,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 201 transitions, 2614 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:46,896 INFO L231 Difference]: Finished difference. Result has 175 places, 181 transitions, 2216 flow [2024-06-27 21:03:46,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2216, PETRI_PLACES=175, PETRI_TRANSITIONS=181} [2024-06-27 21:03:46,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-27 21:03:46,897 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 181 transitions, 2216 flow [2024-06-27 21:03:46,897 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 21:03:46,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:46,897 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 21:03:46,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:03:46,897 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 21:03:46,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:46,897 INFO L85 PathProgramCache]: Analyzing trace with hash -670117660, now seen corresponding path program 1 times [2024-06-27 21:03:46,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:46,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454241789] [2024-06-27 21:03:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:46,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:49,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454241789] [2024-06-27 21:03:49,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454241789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:49,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:49,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:49,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146569594] [2024-06-27 21:03:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:49,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:49,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:49,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:49,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:49,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:49,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 181 transitions, 2216 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:49,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:49,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:49,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:51,417 INFO L124 PetriNetUnfolderBase]: 5680/9237 cut-off events. [2024-06-27 21:03:51,417 INFO L125 PetriNetUnfolderBase]: For 308055/308055 co-relation queries the response was YES. [2024-06-27 21:03:51,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50000 conditions, 9237 events. 5680/9237 cut-off events. For 308055/308055 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 63481 event pairs, 2753 based on Foata normal form. 2/9236 useless extension candidates. Maximal degree in co-relation 49915. Up to 9024 conditions per place. [2024-06-27 21:03:51,486 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 20 changer transitions 0/222 dead transitions. [2024-06-27 21:03:51,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 222 transitions, 2927 flow [2024-06-27 21:03:51,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:03:51,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-27 21:03:51,488 INFO L175 Difference]: Start difference. First operand has 175 places, 181 transitions, 2216 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:03:51,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 222 transitions, 2927 flow [2024-06-27 21:03:51,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 222 transitions, 2875 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:03:51,849 INFO L231 Difference]: Finished difference. Result has 181 places, 188 transitions, 2341 flow [2024-06-27 21:03:51,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2341, PETRI_PLACES=181, PETRI_TRANSITIONS=188} [2024-06-27 21:03:51,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-27 21:03:51,850 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 188 transitions, 2341 flow [2024-06-27 21:03:51,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:51,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:51,850 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 21:03:51,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:03:51,850 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 21:03:51,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:51,851 INFO L85 PathProgramCache]: Analyzing trace with hash -669819130, now seen corresponding path program 2 times [2024-06-27 21:03:51,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:51,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349359866] [2024-06-27 21:03:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:51,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:54,233 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 21:03:54,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:54,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349359866] [2024-06-27 21:03:54,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349359866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:54,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:54,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:54,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752942980] [2024-06-27 21:03:54,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:54,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:54,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:54,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:54,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:54,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:54,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 188 transitions, 2341 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:54,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:54,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:54,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:56,044 INFO L124 PetriNetUnfolderBase]: 5674/9229 cut-off events. [2024-06-27 21:03:56,044 INFO L125 PetriNetUnfolderBase]: For 320962/320962 co-relation queries the response was YES. [2024-06-27 21:03:56,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50192 conditions, 9229 events. 5674/9229 cut-off events. For 320962/320962 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 63508 event pairs, 2753 based on Foata normal form. 2/9228 useless extension candidates. Maximal degree in co-relation 50105. Up to 9019 conditions per place. [2024-06-27 21:03:56,131 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 187 selfloop transitions, 19 changer transitions 0/210 dead transitions. [2024-06-27 21:03:56,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 210 transitions, 2805 flow [2024-06-27 21:03:56,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:03:56,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:03:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:03:56,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:03:56,132 INFO L175 Difference]: Start difference. First operand has 181 places, 188 transitions, 2341 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:03:56,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 210 transitions, 2805 flow [2024-06-27 21:03:56,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 210 transitions, 2775 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:03:56,569 INFO L231 Difference]: Finished difference. Result has 184 places, 188 transitions, 2355 flow [2024-06-27 21:03:56,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2355, PETRI_PLACES=184, PETRI_TRANSITIONS=188} [2024-06-27 21:03:56,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-27 21:03:56,569 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 188 transitions, 2355 flow [2024-06-27 21:03:56,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:56,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:56,570 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 21:03:56,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:03:56,570 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 21:03:56,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:56,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1176809204, now seen corresponding path program 3 times [2024-06-27 21:03:56,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:56,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572099484] [2024-06-27 21:03:56,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:56,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:58,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572099484] [2024-06-27 21:03:58,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572099484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:58,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:58,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:03:58,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888683150] [2024-06-27 21:03:58,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:58,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:03:58,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:58,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:03:58,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:03:58,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:03:58,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 188 transitions, 2355 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:58,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:58,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:03:58,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:00,887 INFO L124 PetriNetUnfolderBase]: 5668/9219 cut-off events. [2024-06-27 21:04:00,887 INFO L125 PetriNetUnfolderBase]: For 334443/334443 co-relation queries the response was YES. [2024-06-27 21:04:00,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50483 conditions, 9219 events. 5668/9219 cut-off events. For 334443/334443 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 63382 event pairs, 2680 based on Foata normal form. 2/9213 useless extension candidates. Maximal degree in co-relation 50394. Up to 8989 conditions per place. [2024-06-27 21:04:00,972 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 181 selfloop transitions, 26 changer transitions 0/211 dead transitions. [2024-06-27 21:04:00,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 211 transitions, 2886 flow [2024-06-27 21:04:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 21:04:00,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-27 21:04:00,974 INFO L175 Difference]: Start difference. First operand has 184 places, 188 transitions, 2355 flow. Second operand 7 states and 107 transitions. [2024-06-27 21:04:00,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 211 transitions, 2886 flow [2024-06-27 21:04:01,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 211 transitions, 2848 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:01,471 INFO L231 Difference]: Finished difference. Result has 187 places, 196 transitions, 2490 flow [2024-06-27 21:04:01,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2490, PETRI_PLACES=187, PETRI_TRANSITIONS=196} [2024-06-27 21:04:01,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-27 21:04:01,472 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 196 transitions, 2490 flow [2024-06-27 21:04:01,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:01,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:01,472 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 21:04:01,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:04:01,472 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 21:04:01,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:01,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1490877148, now seen corresponding path program 1 times [2024-06-27 21:04:01,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:01,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709326401] [2024-06-27 21:04:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:01,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:04,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:04,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709326401] [2024-06-27 21:04:04,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709326401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:04,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:04,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:04,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264724372] [2024-06-27 21:04:04,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:04,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:04,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:04,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:04:04,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 196 transitions, 2490 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 21:04:04,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:04,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:04:04,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:06,573 INFO L124 PetriNetUnfolderBase]: 5774/9406 cut-off events. [2024-06-27 21:04:06,573 INFO L125 PetriNetUnfolderBase]: For 363343/363355 co-relation queries the response was YES. [2024-06-27 21:04:06,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52583 conditions, 9406 events. 5774/9406 cut-off events. For 363343/363355 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 64903 event pairs, 2716 based on Foata normal form. 26/9410 useless extension candidates. Maximal degree in co-relation 52491. Up to 8946 conditions per place. [2024-06-27 21:04:06,661 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 210 selfloop transitions, 52 changer transitions 0/278 dead transitions. [2024-06-27 21:04:06,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 278 transitions, 3769 flow [2024-06-27 21:04:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:04:06,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-27 21:04:06,662 INFO L175 Difference]: Start difference. First operand has 187 places, 196 transitions, 2490 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:04:06,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 278 transitions, 3769 flow [2024-06-27 21:04:07,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 278 transitions, 3715 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:07,113 INFO L231 Difference]: Finished difference. Result has 198 places, 233 transitions, 3254 flow [2024-06-27 21:04:07,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2438, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3254, PETRI_PLACES=198, PETRI_TRANSITIONS=233} [2024-06-27 21:04:07,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-27 21:04:07,114 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 233 transitions, 3254 flow [2024-06-27 21:04:07,114 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 21:04:07,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:07,114 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 21:04:07,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:04:07,114 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 21:04:07,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:07,115 INFO L85 PathProgramCache]: Analyzing trace with hash 710457018, now seen corresponding path program 2 times [2024-06-27 21:04:07,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:07,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599268256] [2024-06-27 21:04:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:07,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:10,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:10,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599268256] [2024-06-27 21:04:10,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599268256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:10,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:10,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:10,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919314333] [2024-06-27 21:04:10,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:10,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:10,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:10,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:04:10,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 233 transitions, 3254 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 21:04:10,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:10,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:04:10,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:12,452 INFO L124 PetriNetUnfolderBase]: 5832/9474 cut-off events. [2024-06-27 21:04:12,452 INFO L125 PetriNetUnfolderBase]: For 384832/384855 co-relation queries the response was YES. [2024-06-27 21:04:12,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55616 conditions, 9474 events. 5832/9474 cut-off events. For 384832/384855 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 65114 event pairs, 2704 based on Foata normal form. 24/9476 useless extension candidates. Maximal degree in co-relation 55519. Up to 8901 conditions per place. [2024-06-27 21:04:12,546 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 188 selfloop transitions, 65 changer transitions 0/269 dead transitions. [2024-06-27 21:04:12,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 269 transitions, 3927 flow [2024-06-27 21:04:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:04:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:04:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:04:12,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 21:04:12,547 INFO L175 Difference]: Start difference. First operand has 198 places, 233 transitions, 3254 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:04:12,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 269 transitions, 3927 flow [2024-06-27 21:04:13,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 269 transitions, 3885 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 21:04:13,021 INFO L231 Difference]: Finished difference. Result has 204 places, 235 transitions, 3410 flow [2024-06-27 21:04:13,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3410, PETRI_PLACES=204, PETRI_TRANSITIONS=235} [2024-06-27 21:04:13,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-27 21:04:13,021 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 235 transitions, 3410 flow [2024-06-27 21:04:13,021 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 21:04:13,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:13,022 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 21:04:13,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:04:13,022 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 21:04:13,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:13,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2121333388, now seen corresponding path program 3 times [2024-06-27 21:04:13,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:13,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749672490] [2024-06-27 21:04:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:13,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:16,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749672490] [2024-06-27 21:04:16,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749672490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:16,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:16,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:16,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812102768] [2024-06-27 21:04:16,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:16,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:16,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:16,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:16,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:04:16,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 235 transitions, 3410 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 21:04:16,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:16,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:04:16,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:18,534 INFO L124 PetriNetUnfolderBase]: 5890/9595 cut-off events. [2024-06-27 21:04:18,535 INFO L125 PetriNetUnfolderBase]: For 402796/402848 co-relation queries the response was YES. [2024-06-27 21:04:18,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56863 conditions, 9595 events. 5890/9595 cut-off events. For 402796/402848 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 66215 event pairs, 2526 based on Foata normal form. 37/9595 useless extension candidates. Maximal degree in co-relation 56764. Up to 8915 conditions per place. [2024-06-27 21:04:18,632 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 78 changer transitions 0/264 dead transitions. [2024-06-27 21:04:18,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 264 transitions, 4227 flow [2024-06-27 21:04:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:04:18,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-27 21:04:18,633 INFO L175 Difference]: Start difference. First operand has 204 places, 235 transitions, 3410 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:04:18,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 264 transitions, 4227 flow [2024-06-27 21:04:19,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 264 transitions, 4065 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:19,253 INFO L231 Difference]: Finished difference. Result has 205 places, 237 transitions, 3469 flow [2024-06-27 21:04:19,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3469, PETRI_PLACES=205, PETRI_TRANSITIONS=237} [2024-06-27 21:04:19,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-27 21:04:19,253 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 237 transitions, 3469 flow [2024-06-27 21:04:19,253 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 21:04:19,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:19,254 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 21:04:19,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:04:19,254 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 21:04:19,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:19,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1178958150, now seen corresponding path program 4 times [2024-06-27 21:04:19,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:19,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628187880] [2024-06-27 21:04:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:19,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:22,203 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 21:04:22,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:22,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628187880] [2024-06-27 21:04:22,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628187880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:22,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:22,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:22,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975613171] [2024-06-27 21:04:22,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:22,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:22,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:22,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:22,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:04:22,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 237 transitions, 3469 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 21:04:22,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:22,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:04:22,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:24,567 INFO L124 PetriNetUnfolderBase]: 5997/9760 cut-off events. [2024-06-27 21:04:24,567 INFO L125 PetriNetUnfolderBase]: For 412317/412369 co-relation queries the response was YES. [2024-06-27 21:04:24,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57932 conditions, 9760 events. 5997/9760 cut-off events. For 412317/412369 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 67406 event pairs, 2486 based on Foata normal form. 37/9760 useless extension candidates. Maximal degree in co-relation 57832. Up to 8696 conditions per place. [2024-06-27 21:04:24,662 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 171 selfloop transitions, 85 changer transitions 0/272 dead transitions. [2024-06-27 21:04:24,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 272 transitions, 4430 flow [2024-06-27 21:04:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:04:24,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-27 21:04:24,663 INFO L175 Difference]: Start difference. First operand has 205 places, 237 transitions, 3469 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:04:24,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 272 transitions, 4430 flow [2024-06-27 21:04:25,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 272 transitions, 4241 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:25,372 INFO L231 Difference]: Finished difference. Result has 207 places, 240 transitions, 3525 flow [2024-06-27 21:04:25,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3525, PETRI_PLACES=207, PETRI_TRANSITIONS=240} [2024-06-27 21:04:25,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-27 21:04:25,373 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 240 transitions, 3525 flow [2024-06-27 21:04:25,373 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 21:04:25,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:25,374 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 21:04:25,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:04:25,374 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 21:04:25,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2089491423, now seen corresponding path program 1 times [2024-06-27 21:04:25,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:25,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930052700] [2024-06-27 21:04:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:25,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:28,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:28,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930052700] [2024-06-27 21:04:28,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930052700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:28,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:28,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:28,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380457638] [2024-06-27 21:04:28,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:28,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:28,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:28,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:28,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:28,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:28,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 240 transitions, 3525 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:28,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:28,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:28,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:30,901 INFO L124 PetriNetUnfolderBase]: 6131/9923 cut-off events. [2024-06-27 21:04:30,902 INFO L125 PetriNetUnfolderBase]: For 421761/421761 co-relation queries the response was YES. [2024-06-27 21:04:30,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59311 conditions, 9923 events. 6131/9923 cut-off events. For 421761/421761 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 68078 event pairs, 2676 based on Foata normal form. 8/9928 useless extension candidates. Maximal degree in co-relation 59210. Up to 9546 conditions per place. [2024-06-27 21:04:30,982 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 256 selfloop transitions, 29 changer transitions 0/289 dead transitions. [2024-06-27 21:04:30,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 289 transitions, 4360 flow [2024-06-27 21:04:30,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 21:04:30,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-27 21:04:30,984 INFO L175 Difference]: Start difference. First operand has 207 places, 240 transitions, 3525 flow. Second operand 10 states and 162 transitions. [2024-06-27 21:04:30,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 289 transitions, 4360 flow [2024-06-27 21:04:31,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 289 transitions, 4226 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:31,515 INFO L231 Difference]: Finished difference. Result has 214 places, 241 transitions, 3462 flow [2024-06-27 21:04:31,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3462, PETRI_PLACES=214, PETRI_TRANSITIONS=241} [2024-06-27 21:04:31,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-27 21:04:31,516 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 241 transitions, 3462 flow [2024-06-27 21:04:31,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:31,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:31,516 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 21:04:31,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:04:31,516 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 21:04:31,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1458358865, now seen corresponding path program 2 times [2024-06-27 21:04:31,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:31,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860672531] [2024-06-27 21:04:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:31,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:34,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:34,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860672531] [2024-06-27 21:04:34,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860672531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:34,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:34,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:34,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994949896] [2024-06-27 21:04:34,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:34,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:34,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:34,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:34,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:34,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:34,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 241 transitions, 3462 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:34,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:34,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:34,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:36,744 INFO L124 PetriNetUnfolderBase]: 6167/9987 cut-off events. [2024-06-27 21:04:36,744 INFO L125 PetriNetUnfolderBase]: For 439000/439000 co-relation queries the response was YES. [2024-06-27 21:04:36,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59805 conditions, 9987 events. 6167/9987 cut-off events. For 439000/439000 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 68742 event pairs, 2837 based on Foata normal form. 10/9994 useless extension candidates. Maximal degree in co-relation 59702. Up to 9701 conditions per place. [2024-06-27 21:04:36,826 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 252 selfloop transitions, 26 changer transitions 0/282 dead transitions. [2024-06-27 21:04:36,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 282 transitions, 4167 flow [2024-06-27 21:04:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 21:04:36,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:04:36,828 INFO L175 Difference]: Start difference. First operand has 214 places, 241 transitions, 3462 flow. Second operand 10 states and 155 transitions. [2024-06-27 21:04:36,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 282 transitions, 4167 flow [2024-06-27 21:04:37,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 282 transitions, 4116 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:04:37,320 INFO L231 Difference]: Finished difference. Result has 217 places, 242 transitions, 3481 flow [2024-06-27 21:04:37,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3481, PETRI_PLACES=217, PETRI_TRANSITIONS=242} [2024-06-27 21:04:37,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-27 21:04:37,320 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 242 transitions, 3481 flow [2024-06-27 21:04:37,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:37,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:37,321 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 21:04:37,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:04:37,321 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 21:04:37,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash 256365475, now seen corresponding path program 1 times [2024-06-27 21:04:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:37,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852423900] [2024-06-27 21:04:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:40,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:40,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852423900] [2024-06-27 21:04:40,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852423900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:40,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:40,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:40,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229597388] [2024-06-27 21:04:40,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:40,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:40,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:40,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:40,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:40,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:40,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 242 transitions, 3481 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:40,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:40,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:40,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:42,858 INFO L124 PetriNetUnfolderBase]: 6165/9997 cut-off events. [2024-06-27 21:04:42,858 INFO L125 PetriNetUnfolderBase]: For 447775/447786 co-relation queries the response was YES. [2024-06-27 21:04:42,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60016 conditions, 9997 events. 6165/9997 cut-off events. For 447775/447786 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 68881 event pairs, 2718 based on Foata normal form. 16/10009 useless extension candidates. Maximal degree in co-relation 59912. Up to 9059 conditions per place. [2024-06-27 21:04:42,955 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 105 changer transitions 1/302 dead transitions. [2024-06-27 21:04:42,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 302 transitions, 4471 flow [2024-06-27 21:04:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:04:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:04:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-27 21:04:42,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43680709534368073 [2024-06-27 21:04:42,956 INFO L175 Difference]: Start difference. First operand has 217 places, 242 transitions, 3481 flow. Second operand 11 states and 197 transitions. [2024-06-27 21:04:42,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 302 transitions, 4471 flow [2024-06-27 21:04:43,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 302 transitions, 4420 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 21:04:43,607 INFO L231 Difference]: Finished difference. Result has 220 places, 244 transitions, 3667 flow [2024-06-27 21:04:43,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3430, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3667, PETRI_PLACES=220, PETRI_TRANSITIONS=244} [2024-06-27 21:04:43,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-27 21:04:43,608 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 244 transitions, 3667 flow [2024-06-27 21:04:43,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:43,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:43,608 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 21:04:43,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:04:43,608 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 21:04:43,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:43,608 INFO L85 PathProgramCache]: Analyzing trace with hash 262079395, now seen corresponding path program 2 times [2024-06-27 21:04:43,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:43,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201116246] [2024-06-27 21:04:43,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:43,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:46,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:46,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201116246] [2024-06-27 21:04:46,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201116246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:46,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:46,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:46,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315122440] [2024-06-27 21:04:46,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:46,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:46,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:46,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 244 transitions, 3667 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:46,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:46,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:46,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:49,279 INFO L124 PetriNetUnfolderBase]: 6267/10161 cut-off events. [2024-06-27 21:04:49,279 INFO L125 PetriNetUnfolderBase]: For 480093/480104 co-relation queries the response was YES. [2024-06-27 21:04:49,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62612 conditions, 10161 events. 6267/10161 cut-off events. For 480093/480104 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 70099 event pairs, 2705 based on Foata normal form. 12/10169 useless extension candidates. Maximal degree in co-relation 62507. Up to 9131 conditions per place. [2024-06-27 21:04:49,373 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 117 changer transitions 1/302 dead transitions. [2024-06-27 21:04:49,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 302 transitions, 4794 flow [2024-06-27 21:04:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 21:04:49,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-27 21:04:49,375 INFO L175 Difference]: Start difference. First operand has 220 places, 244 transitions, 3667 flow. Second operand 10 states and 176 transitions. [2024-06-27 21:04:49,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 302 transitions, 4794 flow [2024-06-27 21:04:50,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 302 transitions, 4582 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 21:04:50,134 INFO L231 Difference]: Finished difference. Result has 223 places, 254 transitions, 3906 flow [2024-06-27 21:04:50,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3469, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3906, PETRI_PLACES=223, PETRI_TRANSITIONS=254} [2024-06-27 21:04:50,134 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-27 21:04:50,135 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 254 transitions, 3906 flow [2024-06-27 21:04:50,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:50,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:50,135 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 21:04:50,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:04:50,136 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 21:04:50,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash 548963749, now seen corresponding path program 3 times [2024-06-27 21:04:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:50,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752492070] [2024-06-27 21:04:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:50,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:52,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:52,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752492070] [2024-06-27 21:04:52,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752492070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:52,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:52,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:52,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499620206] [2024-06-27 21:04:52,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:52,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:52,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:52,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:52,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:52,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 254 transitions, 3906 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:52,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:52,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:52,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:55,071 INFO L124 PetriNetUnfolderBase]: 6240/10100 cut-off events. [2024-06-27 21:04:55,071 INFO L125 PetriNetUnfolderBase]: For 497892/497892 co-relation queries the response was YES. [2024-06-27 21:04:55,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62496 conditions, 10100 events. 6240/10100 cut-off events. For 497892/497892 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 69539 event pairs, 2835 based on Foata normal form. 10/10107 useless extension candidates. Maximal degree in co-relation 62389. Up to 9804 conditions per place. [2024-06-27 21:04:55,178 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 256 selfloop transitions, 24 changer transitions 0/284 dead transitions. [2024-06-27 21:04:55,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 284 transitions, 4574 flow [2024-06-27 21:04:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:04:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:04:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:04:55,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 21:04:55,179 INFO L175 Difference]: Start difference. First operand has 223 places, 254 transitions, 3906 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:04:55,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 284 transitions, 4574 flow [2024-06-27 21:04:56,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 284 transitions, 4420 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:56,029 INFO L231 Difference]: Finished difference. Result has 225 places, 254 transitions, 3805 flow [2024-06-27 21:04:56,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3752, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3805, PETRI_PLACES=225, PETRI_TRANSITIONS=254} [2024-06-27 21:04:56,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-27 21:04:56,029 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 254 transitions, 3805 flow [2024-06-27 21:04:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:56,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:56,030 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 21:04:56,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:04:56,030 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 21:04:56,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash 371656645, now seen corresponding path program 3 times [2024-06-27 21:04:56,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:56,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770466227] [2024-06-27 21:04:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:56,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:58,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:58,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770466227] [2024-06-27 21:04:58,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770466227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:58,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:58,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:58,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410885331] [2024-06-27 21:04:58,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:58,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:58,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:58,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:58,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:58,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:04:58,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 254 transitions, 3805 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:58,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:58,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:04:58,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:01,357 INFO L124 PetriNetUnfolderBase]: 6222/10081 cut-off events. [2024-06-27 21:05:01,357 INFO L125 PetriNetUnfolderBase]: For 502349/502352 co-relation queries the response was YES. [2024-06-27 21:05:01,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61951 conditions, 10081 events. 6222/10081 cut-off events. For 502349/502352 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 69391 event pairs, 2766 based on Foata normal form. 8/10085 useless extension candidates. Maximal degree in co-relation 61843. Up to 9417 conditions per place. [2024-06-27 21:05:01,469 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 79 changer transitions 1/305 dead transitions. [2024-06-27 21:05:01,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 305 transitions, 4678 flow [2024-06-27 21:05:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:01,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 21:05:01,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-27 21:05:01,470 INFO L175 Difference]: Start difference. First operand has 225 places, 254 transitions, 3805 flow. Second operand 10 states and 174 transitions. [2024-06-27 21:05:01,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 305 transitions, 4678 flow [2024-06-27 21:05:02,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 305 transitions, 4620 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:02,224 INFO L231 Difference]: Finished difference. Result has 228 places, 253 transitions, 3891 flow [2024-06-27 21:05:02,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3747, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3891, PETRI_PLACES=228, PETRI_TRANSITIONS=253} [2024-06-27 21:05:02,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-27 21:05:02,225 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 253 transitions, 3891 flow [2024-06-27 21:05:02,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:02,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:02,225 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 21:05:02,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:05:02,225 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 21:05:02,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash 542657605, now seen corresponding path program 4 times [2024-06-27 21:05:02,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:02,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865575324] [2024-06-27 21:05:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:02,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:04,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:04,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865575324] [2024-06-27 21:05:04,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865575324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:04,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:04,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:04,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048086706] [2024-06-27 21:05:04,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:04,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:04,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:04,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:04,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:04,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:04,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 253 transitions, 3891 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:04,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:04,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:04,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:07,812 INFO L124 PetriNetUnfolderBase]: 6144/9953 cut-off events. [2024-06-27 21:05:07,813 INFO L125 PetriNetUnfolderBase]: For 514179/514182 co-relation queries the response was YES. [2024-06-27 21:05:07,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61653 conditions, 9953 events. 6144/9953 cut-off events. For 514179/514182 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 68360 event pairs, 2719 based on Foata normal form. 8/9957 useless extension candidates. Maximal degree in co-relation 61544. Up to 9306 conditions per place. [2024-06-27 21:05:07,908 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 80 changer transitions 2/312 dead transitions. [2024-06-27 21:05:07,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 312 transitions, 4810 flow [2024-06-27 21:05:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:05:07,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:05:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-27 21:05:07,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-27 21:05:07,909 INFO L175 Difference]: Start difference. First operand has 228 places, 253 transitions, 3891 flow. Second operand 12 states and 200 transitions. [2024-06-27 21:05:07,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 312 transitions, 4810 flow [2024-06-27 21:05:08,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 312 transitions, 4684 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:08,693 INFO L231 Difference]: Finished difference. Result has 233 places, 251 transitions, 3888 flow [2024-06-27 21:05:08,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3888, PETRI_PLACES=233, PETRI_TRANSITIONS=251} [2024-06-27 21:05:08,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-27 21:05:08,693 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 251 transitions, 3888 flow [2024-06-27 21:05:08,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:08,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:08,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:08,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:05:08,694 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 21:05:08,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash 549086695, now seen corresponding path program 5 times [2024-06-27 21:05:08,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:08,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376080608] [2024-06-27 21:05:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:08,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:11,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:11,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376080608] [2024-06-27 21:05:11,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376080608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:11,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:11,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:11,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177196867] [2024-06-27 21:05:11,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:11,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:11,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:11,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:11,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 251 transitions, 3888 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:11,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:11,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:11,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:13,924 INFO L124 PetriNetUnfolderBase]: 5918/9568 cut-off events. [2024-06-27 21:05:13,924 INFO L125 PetriNetUnfolderBase]: For 524581/524592 co-relation queries the response was YES. [2024-06-27 21:05:13,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60453 conditions, 9568 events. 5918/9568 cut-off events. For 524581/524592 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 65045 event pairs, 2647 based on Foata normal form. 12/9576 useless extension candidates. Maximal degree in co-relation 60343. Up to 9120 conditions per place. [2024-06-27 21:05:14,004 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 211 selfloop transitions, 64 changer transitions 4/283 dead transitions. [2024-06-27 21:05:14,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 283 transitions, 4550 flow [2024-06-27 21:05:14,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 21:05:14,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-27 21:05:14,005 INFO L175 Difference]: Start difference. First operand has 233 places, 251 transitions, 3888 flow. Second operand 9 states and 141 transitions. [2024-06-27 21:05:14,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 283 transitions, 4550 flow [2024-06-27 21:05:14,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 283 transitions, 4364 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 21:05:14,663 INFO L231 Difference]: Finished difference. Result has 233 places, 247 transitions, 3767 flow [2024-06-27 21:05:14,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3702, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3767, PETRI_PLACES=233, PETRI_TRANSITIONS=247} [2024-06-27 21:05:14,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-27 21:05:14,663 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 247 transitions, 3767 flow [2024-06-27 21:05:14,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:14,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:14,663 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 21:05:14,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:05:14,664 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 21:05:14,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1905890855, now seen corresponding path program 6 times [2024-06-27 21:05:14,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:14,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047252243] [2024-06-27 21:05:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:14,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:17,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:17,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047252243] [2024-06-27 21:05:17,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047252243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:17,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:17,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:17,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431960831] [2024-06-27 21:05:17,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:17,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:17,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:17,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:17,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:17,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:17,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 247 transitions, 3767 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:17,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:17,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:17,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:19,513 INFO L124 PetriNetUnfolderBase]: 5692/9224 cut-off events. [2024-06-27 21:05:19,513 INFO L125 PetriNetUnfolderBase]: For 536348/536359 co-relation queries the response was YES. [2024-06-27 21:05:19,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59194 conditions, 9224 events. 5692/9224 cut-off events. For 536348/536359 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 62369 event pairs, 2417 based on Foata normal form. 12/9232 useless extension candidates. Maximal degree in co-relation 59083. Up to 8282 conditions per place. [2024-06-27 21:05:19,612 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 173 selfloop transitions, 104 changer transitions 2/283 dead transitions. [2024-06-27 21:05:19,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 283 transitions, 4648 flow [2024-06-27 21:05:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:05:19,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:05:19,614 INFO L175 Difference]: Start difference. First operand has 233 places, 247 transitions, 3767 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:05:19,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 283 transitions, 4648 flow [2024-06-27 21:05:20,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 283 transitions, 4306 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-27 21:05:20,499 INFO L231 Difference]: Finished difference. Result has 229 places, 245 transitions, 3624 flow [2024-06-27 21:05:20,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3433, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3624, PETRI_PLACES=229, PETRI_TRANSITIONS=245} [2024-06-27 21:05:20,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-27 21:05:20,499 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 245 transitions, 3624 flow [2024-06-27 21:05:20,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:20,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:20,500 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 21:05:20,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:05:20,500 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 21:05:20,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash 549332711, now seen corresponding path program 1 times [2024-06-27 21:05:20,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:20,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620510526] [2024-06-27 21:05:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:20,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:24,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:24,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620510526] [2024-06-27 21:05:24,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620510526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:24,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:24,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:24,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938969980] [2024-06-27 21:05:24,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:24,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:24,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:24,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:24,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:24,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:24,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 245 transitions, 3624 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:24,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:24,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:24,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:26,235 INFO L124 PetriNetUnfolderBase]: 5548/8972 cut-off events. [2024-06-27 21:05:26,235 INFO L125 PetriNetUnfolderBase]: For 522066/522066 co-relation queries the response was YES. [2024-06-27 21:05:26,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57729 conditions, 8972 events. 5548/8972 cut-off events. For 522066/522066 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 60153 event pairs, 2415 based on Foata normal form. 6/8975 useless extension candidates. Maximal degree in co-relation 57619. Up to 8594 conditions per place. [2024-06-27 21:05:26,326 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 251 selfloop transitions, 26 changer transitions 0/281 dead transitions. [2024-06-27 21:05:26,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 281 transitions, 4345 flow [2024-06-27 21:05:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:05:26,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-27 21:05:26,328 INFO L175 Difference]: Start difference. First operand has 229 places, 245 transitions, 3624 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:05:26,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 281 transitions, 4345 flow [2024-06-27 21:05:27,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 281 transitions, 4069 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 21:05:27,050 INFO L231 Difference]: Finished difference. Result has 228 places, 249 transitions, 3471 flow [2024-06-27 21:05:27,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3348, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3471, PETRI_PLACES=228, PETRI_TRANSITIONS=249} [2024-06-27 21:05:27,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-27 21:05:27,051 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 249 transitions, 3471 flow [2024-06-27 21:05:27,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:27,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:27,051 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 21:05:27,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:05:27,051 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 21:05:27,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:27,051 INFO L85 PathProgramCache]: Analyzing trace with hash -715741033, now seen corresponding path program 4 times [2024-06-27 21:05:27,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:27,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058601040] [2024-06-27 21:05:27,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:27,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:30,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:30,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058601040] [2024-06-27 21:05:30,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058601040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:30,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:30,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:30,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108733815] [2024-06-27 21:05:30,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:30,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:30,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:30,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:30,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:30,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 249 transitions, 3471 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:30,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:30,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:30,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:32,486 INFO L124 PetriNetUnfolderBase]: 5558/8990 cut-off events. [2024-06-27 21:05:32,486 INFO L125 PetriNetUnfolderBase]: For 538342/538342 co-relation queries the response was YES. [2024-06-27 21:05:32,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57533 conditions, 8990 events. 5558/8990 cut-off events. For 538342/538342 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 60255 event pairs, 2394 based on Foata normal form. 10/8990 useless extension candidates. Maximal degree in co-relation 57422. Up to 8672 conditions per place. [2024-06-27 21:05:32,575 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 240 selfloop transitions, 29 changer transitions 0/273 dead transitions. [2024-06-27 21:05:32,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 273 transitions, 4111 flow [2024-06-27 21:05:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:05:32,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-27 21:05:32,577 INFO L175 Difference]: Start difference. First operand has 228 places, 249 transitions, 3471 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:05:32,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 273 transitions, 4111 flow [2024-06-27 21:05:33,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 273 transitions, 4064 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:33,366 INFO L231 Difference]: Finished difference. Result has 232 places, 250 transitions, 3505 flow [2024-06-27 21:05:33,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3424, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3505, PETRI_PLACES=232, PETRI_TRANSITIONS=250} [2024-06-27 21:05:33,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 21:05:33,367 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 250 transitions, 3505 flow [2024-06-27 21:05:33,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:33,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:33,367 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 21:05:33,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:05:33,367 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 21:05:33,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:33,368 INFO L85 PathProgramCache]: Analyzing trace with hash -975564579, now seen corresponding path program 1 times [2024-06-27 21:05:33,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:33,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007294795] [2024-06-27 21:05:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:33,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:35,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007294795] [2024-06-27 21:05:35,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007294795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:35,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:35,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:35,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723576892] [2024-06-27 21:05:35,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:35,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:35,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:35,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:35,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:35,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:35,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 250 transitions, 3505 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:35,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:35,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:35,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:38,336 INFO L124 PetriNetUnfolderBase]: 5546/9000 cut-off events. [2024-06-27 21:05:38,337 INFO L125 PetriNetUnfolderBase]: For 543208/543263 co-relation queries the response was YES. [2024-06-27 21:05:38,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57661 conditions, 9000 events. 5546/9000 cut-off events. For 543208/543263 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 60537 event pairs, 2210 based on Foata normal form. 40/9028 useless extension candidates. Maximal degree in co-relation 57548. Up to 8372 conditions per place. [2024-06-27 21:05:38,436 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 203 selfloop transitions, 72 changer transitions 0/279 dead transitions. [2024-06-27 21:05:38,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 279 transitions, 4258 flow [2024-06-27 21:05:38,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:05:38,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 21:05:38,437 INFO L175 Difference]: Start difference. First operand has 232 places, 250 transitions, 3505 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:05:38,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 279 transitions, 4258 flow [2024-06-27 21:05:39,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 279 transitions, 4183 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:39,188 INFO L231 Difference]: Finished difference. Result has 233 places, 250 transitions, 3580 flow [2024-06-27 21:05:39,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3430, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3580, PETRI_PLACES=233, PETRI_TRANSITIONS=250} [2024-06-27 21:05:39,188 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-27 21:05:39,188 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 250 transitions, 3580 flow [2024-06-27 21:05:39,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:39,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:39,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:39,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:05:39,189 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 21:05:39,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:39,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1065462235, now seen corresponding path program 7 times [2024-06-27 21:05:39,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:39,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964867563] [2024-06-27 21:05:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:39,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:41,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964867563] [2024-06-27 21:05:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964867563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:41,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221945156] [2024-06-27 21:05:41,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:41,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:41,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:41,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:41,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:41,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 250 transitions, 3580 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:41,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:41,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:41,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:44,177 INFO L124 PetriNetUnfolderBase]: 5528/8970 cut-off events. [2024-06-27 21:05:44,177 INFO L125 PetriNetUnfolderBase]: For 555591/555602 co-relation queries the response was YES. [2024-06-27 21:05:44,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57659 conditions, 8970 events. 5528/8970 cut-off events. For 555591/555602 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 60333 event pairs, 2352 based on Foata normal form. 16/8982 useless extension candidates. Maximal degree in co-relation 57545. Up to 8160 conditions per place. [2024-06-27 21:05:44,270 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 93 changer transitions 1/295 dead transitions. [2024-06-27 21:05:44,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 295 transitions, 4415 flow [2024-06-27 21:05:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:05:44,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-27 21:05:44,271 INFO L175 Difference]: Start difference. First operand has 233 places, 250 transitions, 3580 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:05:44,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 295 transitions, 4415 flow [2024-06-27 21:05:45,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 295 transitions, 4213 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:45,298 INFO L231 Difference]: Finished difference. Result has 236 places, 249 transitions, 3569 flow [2024-06-27 21:05:45,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3569, PETRI_PLACES=236, PETRI_TRANSITIONS=249} [2024-06-27 21:05:45,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-27 21:05:45,299 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 249 transitions, 3569 flow [2024-06-27 21:05:45,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:45,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:45,299 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 21:05:45,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:05:45,300 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 21:05:45,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1184861371, now seen corresponding path program 8 times [2024-06-27 21:05:45,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:45,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036042008] [2024-06-27 21:05:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:45,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:48,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:48,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036042008] [2024-06-27 21:05:48,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036042008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:48,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:48,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:48,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472363874] [2024-06-27 21:05:48,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:48,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:48,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:48,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:48,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:48,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:48,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 249 transitions, 3569 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:48,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:48,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:48,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:50,593 INFO L124 PetriNetUnfolderBase]: 5450/8844 cut-off events. [2024-06-27 21:05:50,594 INFO L125 PetriNetUnfolderBase]: For 565310/565321 co-relation queries the response was YES. [2024-06-27 21:05:50,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57197 conditions, 8844 events. 5450/8844 cut-off events. For 565310/565321 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 59380 event pairs, 2309 based on Foata normal form. 16/8856 useless extension candidates. Maximal degree in co-relation 57082. Up to 8049 conditions per place. [2024-06-27 21:05:50,671 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 90 changer transitions 3/290 dead transitions. [2024-06-27 21:05:50,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 290 transitions, 4275 flow [2024-06-27 21:05:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:05:50,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 21:05:50,672 INFO L175 Difference]: Start difference. First operand has 236 places, 249 transitions, 3569 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:05:50,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 290 transitions, 4275 flow [2024-06-27 21:05:51,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 290 transitions, 4103 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 21:05:51,530 INFO L231 Difference]: Finished difference. Result has 236 places, 247 transitions, 3568 flow [2024-06-27 21:05:51,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3397, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3568, PETRI_PLACES=236, PETRI_TRANSITIONS=247} [2024-06-27 21:05:51,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-27 21:05:51,530 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 247 transitions, 3568 flow [2024-06-27 21:05:51,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:51,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:51,530 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 21:05:51,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:05:51,531 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 21:05:51,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1691851259, now seen corresponding path program 2 times [2024-06-27 21:05:51,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:51,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503136060] [2024-06-27 21:05:51,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:51,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:54,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:54,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503136060] [2024-06-27 21:05:54,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503136060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:54,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:54,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:54,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877990616] [2024-06-27 21:05:54,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:54,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:54,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:54,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:54,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:05:54,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 247 transitions, 3568 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:54,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:54,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:05:54,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:56,434 INFO L124 PetriNetUnfolderBase]: 5274/8566 cut-off events. [2024-06-27 21:05:56,434 INFO L125 PetriNetUnfolderBase]: For 538458/538510 co-relation queries the response was YES. [2024-06-27 21:05:56,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55660 conditions, 8566 events. 5274/8566 cut-off events. For 538458/538510 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 57049 event pairs, 2106 based on Foata normal form. 25/8576 useless extension candidates. Maximal degree in co-relation 55546. Up to 7948 conditions per place. [2024-06-27 21:05:56,533 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 187 selfloop transitions, 76 changer transitions 0/267 dead transitions. [2024-06-27 21:05:56,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 267 transitions, 4161 flow [2024-06-27 21:05:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:05:56,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-27 21:05:56,534 INFO L175 Difference]: Start difference. First operand has 236 places, 247 transitions, 3568 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:05:56,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 267 transitions, 4161 flow [2024-06-27 21:05:57,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 267 transitions, 3832 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-27 21:05:57,514 INFO L231 Difference]: Finished difference. Result has 230 places, 247 transitions, 3397 flow [2024-06-27 21:05:57,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3397, PETRI_PLACES=230, PETRI_TRANSITIONS=247} [2024-06-27 21:05:57,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 21:05:57,515 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 247 transitions, 3397 flow [2024-06-27 21:05:57,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:57,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:57,515 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 21:05:57,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:05:57,515 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 21:05:57,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:57,516 INFO L85 PathProgramCache]: Analyzing trace with hash -830598331, now seen corresponding path program 9 times [2024-06-27 21:05:57,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:57,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794946871] [2024-06-27 21:05:57,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:57,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:00,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:00,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794946871] [2024-06-27 21:06:00,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794946871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:00,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:00,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:00,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74870072] [2024-06-27 21:06:00,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:00,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:00,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:00,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:00,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:00,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:00,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 247 transitions, 3397 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:00,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:00,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:00,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:02,767 INFO L124 PetriNetUnfolderBase]: 5288/8598 cut-off events. [2024-06-27 21:06:02,767 INFO L125 PetriNetUnfolderBase]: For 516566/516618 co-relation queries the response was YES. [2024-06-27 21:06:02,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54898 conditions, 8598 events. 5288/8598 cut-off events. For 516566/516618 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 57386 event pairs, 2072 based on Foata normal form. 27/8610 useless extension candidates. Maximal degree in co-relation 54785. Up to 7499 conditions per place. [2024-06-27 21:06:02,857 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 152 selfloop transitions, 131 changer transitions 0/287 dead transitions. [2024-06-27 21:06:02,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 287 transitions, 4325 flow [2024-06-27 21:06:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:06:02,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 21:06:02,858 INFO L175 Difference]: Start difference. First operand has 230 places, 247 transitions, 3397 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:06:02,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 287 transitions, 4325 flow [2024-06-27 21:06:03,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 287 transitions, 4097 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:03,570 INFO L231 Difference]: Finished difference. Result has 232 places, 250 transitions, 3471 flow [2024-06-27 21:06:03,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3471, PETRI_PLACES=232, PETRI_TRANSITIONS=250} [2024-06-27 21:06:03,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 21:06:03,571 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 250 transitions, 3471 flow [2024-06-27 21:06:03,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:03,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:03,571 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 21:06:03,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:06:03,571 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 21:06:03,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1739119523, now seen corresponding path program 10 times [2024-06-27 21:06:03,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:03,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135421515] [2024-06-27 21:06:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:03,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:06,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:06,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135421515] [2024-06-27 21:06:06,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135421515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:06,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:06,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:06,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253689942] [2024-06-27 21:06:06,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:06,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:06,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:06,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:06,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:06,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:06,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 250 transitions, 3471 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:06,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:06,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:06,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:09,124 INFO L124 PetriNetUnfolderBase]: 5282/8546 cut-off events. [2024-06-27 21:06:09,125 INFO L125 PetriNetUnfolderBase]: For 527052/527081 co-relation queries the response was YES. [2024-06-27 21:06:09,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55117 conditions, 8546 events. 5282/8546 cut-off events. For 527052/527081 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 56784 event pairs, 2024 based on Foata normal form. 6/8530 useless extension candidates. Maximal degree in co-relation 55004. Up to 7388 conditions per place. [2024-06-27 21:06:09,203 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 158 selfloop transitions, 119 changer transitions 0/281 dead transitions. [2024-06-27 21:06:09,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 281 transitions, 4408 flow [2024-06-27 21:06:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:06:09,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 21:06:09,204 INFO L175 Difference]: Start difference. First operand has 232 places, 250 transitions, 3471 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:06:09,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 281 transitions, 4408 flow [2024-06-27 21:06:10,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 281 transitions, 4115 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:10,114 INFO L231 Difference]: Finished difference. Result has 234 places, 256 transitions, 3574 flow [2024-06-27 21:06:10,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3574, PETRI_PLACES=234, PETRI_TRANSITIONS=256} [2024-06-27 21:06:10,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-27 21:06:10,115 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 256 transitions, 3574 flow [2024-06-27 21:06:10,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:10,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:10,115 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 21:06:10,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:06:10,116 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 21:06:10,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2093195077, now seen corresponding path program 2 times [2024-06-27 21:06:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:10,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21322910] [2024-06-27 21:06:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:13,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:13,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21322910] [2024-06-27 21:06:13,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21322910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:13,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:13,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:13,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088666814] [2024-06-27 21:06:13,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:13,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:13,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:13,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:13,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 256 transitions, 3574 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:13,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:13,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:13,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:15,962 INFO L124 PetriNetUnfolderBase]: 5302/8590 cut-off events. [2024-06-27 21:06:15,962 INFO L125 PetriNetUnfolderBase]: For 555779/555779 co-relation queries the response was YES. [2024-06-27 21:06:16,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57039 conditions, 8590 events. 5302/8590 cut-off events. For 555779/555779 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 57135 event pairs, 2228 based on Foata normal form. 6/8586 useless extension candidates. Maximal degree in co-relation 56924. Up to 8238 conditions per place. [2024-06-27 21:06:16,042 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 249 selfloop transitions, 31 changer transitions 0/284 dead transitions. [2024-06-27 21:06:16,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 284 transitions, 4280 flow [2024-06-27 21:06:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:16,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 21:06:16,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:06:16,043 INFO L175 Difference]: Start difference. First operand has 234 places, 256 transitions, 3574 flow. Second operand 8 states and 123 transitions. [2024-06-27 21:06:16,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 284 transitions, 4280 flow [2024-06-27 21:06:16,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 284 transitions, 4140 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:16,770 INFO L231 Difference]: Finished difference. Result has 239 places, 259 transitions, 3554 flow [2024-06-27 21:06:16,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3434, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3554, PETRI_PLACES=239, PETRI_TRANSITIONS=259} [2024-06-27 21:06:16,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-27 21:06:16,770 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 259 transitions, 3554 flow [2024-06-27 21:06:16,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:16,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:16,771 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 21:06:16,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:06:16,771 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 21:06:16,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2107004647, now seen corresponding path program 3 times [2024-06-27 21:06:16,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:16,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115692232] [2024-06-27 21:06:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:16,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:20,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:20,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115692232] [2024-06-27 21:06:20,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115692232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:20,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:20,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:20,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879299836] [2024-06-27 21:06:20,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:20,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:20,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:20,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:20,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:20,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:20,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 259 transitions, 3554 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:20,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:20,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:20,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:22,633 INFO L124 PetriNetUnfolderBase]: 5289/8571 cut-off events. [2024-06-27 21:06:22,633 INFO L125 PetriNetUnfolderBase]: For 564960/564960 co-relation queries the response was YES. [2024-06-27 21:06:22,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56977 conditions, 8571 events. 5289/8571 cut-off events. For 564960/564960 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 56996 event pairs, 2208 based on Foata normal form. 6/8567 useless extension candidates. Maximal degree in co-relation 56858. Up to 8057 conditions per place. [2024-06-27 21:06:22,715 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 246 selfloop transitions, 38 changer transitions 0/288 dead transitions. [2024-06-27 21:06:22,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 288 transitions, 4278 flow [2024-06-27 21:06:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 21:06:22,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-27 21:06:22,716 INFO L175 Difference]: Start difference. First operand has 239 places, 259 transitions, 3554 flow. Second operand 8 states and 122 transitions. [2024-06-27 21:06:22,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 288 transitions, 4278 flow [2024-06-27 21:06:23,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 288 transitions, 4188 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:23,590 INFO L231 Difference]: Finished difference. Result has 244 places, 263 transitions, 3626 flow [2024-06-27 21:06:23,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3626, PETRI_PLACES=244, PETRI_TRANSITIONS=263} [2024-06-27 21:06:23,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-27 21:06:23,591 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 263 transitions, 3626 flow [2024-06-27 21:06:23,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:23,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:23,591 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 21:06:23,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:06:23,592 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 21:06:23,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:23,592 INFO L85 PathProgramCache]: Analyzing trace with hash -966984771, now seen corresponding path program 1 times [2024-06-27 21:06:23,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:23,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637452482] [2024-06-27 21:06:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:23,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:26,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:26,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637452482] [2024-06-27 21:06:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637452482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:26,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:26,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:26,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181928816] [2024-06-27 21:06:26,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:26,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:26,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:26,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:26,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 263 transitions, 3626 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:26,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:26,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:26,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:28,001 INFO L124 PetriNetUnfolderBase]: 5291/8593 cut-off events. [2024-06-27 21:06:28,002 INFO L125 PetriNetUnfolderBase]: For 580851/580851 co-relation queries the response was YES. [2024-06-27 21:06:28,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57268 conditions, 8593 events. 5291/8593 cut-off events. For 580851/580851 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 57219 event pairs, 2042 based on Foata normal form. 8/8595 useless extension candidates. Maximal degree in co-relation 57146. Up to 8165 conditions per place. [2024-06-27 21:06:28,097 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 271 selfloop transitions, 17 changer transitions 0/292 dead transitions. [2024-06-27 21:06:28,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 292 transitions, 4438 flow [2024-06-27 21:06:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 21:06:28,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-27 21:06:28,099 INFO L175 Difference]: Start difference. First operand has 244 places, 263 transitions, 3626 flow. Second operand 6 states and 107 transitions. [2024-06-27 21:06:28,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 292 transitions, 4438 flow [2024-06-27 21:06:28,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 292 transitions, 4342 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:28,947 INFO L231 Difference]: Finished difference. Result has 246 places, 264 transitions, 3578 flow [2024-06-27 21:06:28,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3578, PETRI_PLACES=246, PETRI_TRANSITIONS=264} [2024-06-27 21:06:28,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-27 21:06:28,947 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 264 transitions, 3578 flow [2024-06-27 21:06:28,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:28,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:28,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:28,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:06:28,948 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 21:06:28,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1137308131, now seen corresponding path program 1 times [2024-06-27 21:06:28,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:28,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787988211] [2024-06-27 21:06:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:28,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:31,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:31,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787988211] [2024-06-27 21:06:31,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787988211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:31,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:31,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:31,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199362146] [2024-06-27 21:06:31,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:31,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:31,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:31,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:31,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 264 transitions, 3578 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:31,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:31,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:31,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:33,270 INFO L124 PetriNetUnfolderBase]: 5273/8567 cut-off events. [2024-06-27 21:06:33,271 INFO L125 PetriNetUnfolderBase]: For 585646/585646 co-relation queries the response was YES. [2024-06-27 21:06:33,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56853 conditions, 8567 events. 5273/8567 cut-off events. For 585646/585646 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 57032 event pairs, 2032 based on Foata normal form. 8/8569 useless extension candidates. Maximal degree in co-relation 56730. Up to 8157 conditions per place. [2024-06-27 21:06:33,368 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 270 selfloop transitions, 17 changer transitions 0/291 dead transitions. [2024-06-27 21:06:33,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 291 transitions, 4262 flow [2024-06-27 21:06:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:33,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:06:33,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:06:33,369 INFO L175 Difference]: Start difference. First operand has 246 places, 264 transitions, 3578 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:06:33,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 291 transitions, 4262 flow [2024-06-27 21:06:34,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 291 transitions, 4225 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:34,329 INFO L231 Difference]: Finished difference. Result has 249 places, 264 transitions, 3579 flow [2024-06-27 21:06:34,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3541, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3579, PETRI_PLACES=249, PETRI_TRANSITIONS=264} [2024-06-27 21:06:34,329 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-27 21:06:34,330 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 264 transitions, 3579 flow [2024-06-27 21:06:34,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:34,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:34,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:34,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:06:34,330 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 21:06:34,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:34,331 INFO L85 PathProgramCache]: Analyzing trace with hash -6803442, now seen corresponding path program 1 times [2024-06-27 21:06:34,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:34,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414827401] [2024-06-27 21:06:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:34,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:37,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:37,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414827401] [2024-06-27 21:06:37,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414827401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:37,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:37,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:37,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571371175] [2024-06-27 21:06:37,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:37,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:37,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:37,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:37,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:37,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:37,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 264 transitions, 3579 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:37,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:37,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:37,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:40,220 INFO L124 PetriNetUnfolderBase]: 5293/8615 cut-off events. [2024-06-27 21:06:40,221 INFO L125 PetriNetUnfolderBase]: For 579417/579472 co-relation queries the response was YES. [2024-06-27 21:06:40,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56988 conditions, 8615 events. 5293/8615 cut-off events. For 579417/579472 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 57632 event pairs, 2027 based on Foata normal form. 40/8643 useless extension candidates. Maximal degree in co-relation 56864. Up to 7500 conditions per place. [2024-06-27 21:06:40,320 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 129 changer transitions 0/327 dead transitions. [2024-06-27 21:06:40,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 327 transitions, 4686 flow [2024-06-27 21:06:40,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:06:40,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:06:40,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-27 21:06:40,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 21:06:40,322 INFO L175 Difference]: Start difference. First operand has 249 places, 264 transitions, 3579 flow. Second operand 12 states and 207 transitions. [2024-06-27 21:06:40,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 327 transitions, 4686 flow [2024-06-27 21:06:41,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 327 transitions, 4641 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:41,299 INFO L231 Difference]: Finished difference. Result has 256 places, 267 transitions, 3828 flow [2024-06-27 21:06:41,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3828, PETRI_PLACES=256, PETRI_TRANSITIONS=267} [2024-06-27 21:06:41,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-27 21:06:41,299 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 267 transitions, 3828 flow [2024-06-27 21:06:41,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:41,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:41,299 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 21:06:41,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:06:41,300 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 21:06:41,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash 395292550, now seen corresponding path program 2 times [2024-06-27 21:06:41,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:41,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482672626] [2024-06-27 21:06:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:41,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:44,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:44,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482672626] [2024-06-27 21:06:44,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482672626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:44,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:44,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:44,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248191573] [2024-06-27 21:06:44,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:44,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:44,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:44,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:44,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:44,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 267 transitions, 3828 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:44,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:44,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:44,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:47,249 INFO L124 PetriNetUnfolderBase]: 5281/8599 cut-off events. [2024-06-27 21:06:47,250 INFO L125 PetriNetUnfolderBase]: For 593395/593450 co-relation queries the response was YES. [2024-06-27 21:06:47,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57557 conditions, 8599 events. 5281/8599 cut-off events. For 593395/593450 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 57520 event pairs, 2027 based on Foata normal form. 40/8627 useless extension candidates. Maximal degree in co-relation 57432. Up to 7492 conditions per place. [2024-06-27 21:06:47,345 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 129 changer transitions 0/326 dead transitions. [2024-06-27 21:06:47,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 326 transitions, 4787 flow [2024-06-27 21:06:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:06:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:06:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-27 21:06:47,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-27 21:06:47,346 INFO L175 Difference]: Start difference. First operand has 256 places, 267 transitions, 3828 flow. Second operand 12 states and 206 transitions. [2024-06-27 21:06:47,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 326 transitions, 4787 flow [2024-06-27 21:06:48,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 326 transitions, 4466 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 21:06:48,443 INFO L231 Difference]: Finished difference. Result has 258 places, 267 transitions, 3771 flow [2024-06-27 21:06:48,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3771, PETRI_PLACES=258, PETRI_TRANSITIONS=267} [2024-06-27 21:06:48,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-27 21:06:48,443 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 267 transitions, 3771 flow [2024-06-27 21:06:48,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:48,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:48,444 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 21:06:48,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:06:48,444 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 21:06:48,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash -910164008, now seen corresponding path program 3 times [2024-06-27 21:06:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:48,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437795504] [2024-06-27 21:06:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:48,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:51,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:51,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437795504] [2024-06-27 21:06:51,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437795504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:51,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:51,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:51,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687572693] [2024-06-27 21:06:51,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:51,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:51,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:51,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:51,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:51,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:51,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 267 transitions, 3771 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:51,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:51,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:51,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:54,583 INFO L124 PetriNetUnfolderBase]: 5301/8635 cut-off events. [2024-06-27 21:06:54,584 INFO L125 PetriNetUnfolderBase]: For 611654/611706 co-relation queries the response was YES. [2024-06-27 21:06:54,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57888 conditions, 8635 events. 5301/8635 cut-off events. For 611654/611706 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 57785 event pairs, 2029 based on Foata normal form. 25/8645 useless extension candidates. Maximal degree in co-relation 57762. Up to 7508 conditions per place. [2024-06-27 21:06:54,662 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 137 changer transitions 0/313 dead transitions. [2024-06-27 21:06:54,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 313 transitions, 4685 flow [2024-06-27 21:06:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:06:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:06:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-27 21:06:54,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:06:54,663 INFO L175 Difference]: Start difference. First operand has 258 places, 267 transitions, 3771 flow. Second operand 12 states and 192 transitions. [2024-06-27 21:06:54,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 313 transitions, 4685 flow [2024-06-27 21:06:55,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 313 transitions, 4417 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 21:06:55,607 INFO L231 Difference]: Finished difference. Result has 259 places, 270 transitions, 3820 flow [2024-06-27 21:06:55,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3820, PETRI_PLACES=259, PETRI_TRANSITIONS=270} [2024-06-27 21:06:55,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-27 21:06:55,608 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 270 transitions, 3820 flow [2024-06-27 21:06:55,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:55,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:55,608 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, 1] [2024-06-27 21:06:55,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:06:55,608 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 21:06:55,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:55,608 INFO L85 PathProgramCache]: Analyzing trace with hash 167106292, now seen corresponding path program 4 times [2024-06-27 21:06:55,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:55,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124036321] [2024-06-27 21:06:55,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:55,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:58,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:58,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124036321] [2024-06-27 21:06:58,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124036321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:58,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:58,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:58,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405772534] [2024-06-27 21:06:58,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:58,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:58,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:58,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:58,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:58,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:06:58,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 270 transitions, 3820 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:58,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:58,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:06:58,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:01,762 INFO L124 PetriNetUnfolderBase]: 5289/8617 cut-off events. [2024-06-27 21:07:01,762 INFO L125 PetriNetUnfolderBase]: For 604649/604701 co-relation queries the response was YES. [2024-06-27 21:07:01,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57569 conditions, 8617 events. 5289/8617 cut-off events. For 604649/604701 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 57560 event pairs, 2029 based on Foata normal form. 25/8627 useless extension candidates. Maximal degree in co-relation 57442. Up to 7500 conditions per place. [2024-06-27 21:07:01,872 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 171 selfloop transitions, 137 changer transitions 0/312 dead transitions. [2024-06-27 21:07:01,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 312 transitions, 4575 flow [2024-06-27 21:07:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:07:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:07:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-27 21:07:01,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882113821138211 [2024-06-27 21:07:01,873 INFO L175 Difference]: Start difference. First operand has 259 places, 270 transitions, 3820 flow. Second operand 12 states and 191 transitions. [2024-06-27 21:07:01,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 312 transitions, 4575 flow [2024-06-27 21:07:03,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 312 transitions, 4265 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 21:07:03,008 INFO L231 Difference]: Finished difference. Result has 261 places, 270 transitions, 3790 flow [2024-06-27 21:07:03,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3510, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3790, PETRI_PLACES=261, PETRI_TRANSITIONS=270} [2024-06-27 21:07:03,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-27 21:07:03,008 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 270 transitions, 3790 flow [2024-06-27 21:07:03,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:03,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:03,009 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 21:07:03,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:07:03,009 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 21:07:03,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:03,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1921867816, now seen corresponding path program 5 times [2024-06-27 21:07:03,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:03,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862659411] [2024-06-27 21:07:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:03,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:05,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:05,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862659411] [2024-06-27 21:07:05,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862659411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:05,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:05,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:05,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485769425] [2024-06-27 21:07:05,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:05,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:05,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:05,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:05,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:05,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:05,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 270 transitions, 3790 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:05,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:05,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:05,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:08,900 INFO L124 PetriNetUnfolderBase]: 5277/8567 cut-off events. [2024-06-27 21:07:08,901 INFO L125 PetriNetUnfolderBase]: For 615148/615177 co-relation queries the response was YES. [2024-06-27 21:07:08,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57428 conditions, 8567 events. 5277/8567 cut-off events. For 615148/615177 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 57046 event pairs, 2003 based on Foata normal form. 8/8553 useless extension candidates. Maximal degree in co-relation 57300. Up to 7389 conditions per place. [2024-06-27 21:07:08,997 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 171 selfloop transitions, 126 changer transitions 0/301 dead transitions. [2024-06-27 21:07:08,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 301 transitions, 4487 flow [2024-06-27 21:07:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:07:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:07:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-27 21:07:08,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37472283813747226 [2024-06-27 21:07:08,998 INFO L175 Difference]: Start difference. First operand has 261 places, 270 transitions, 3790 flow. Second operand 11 states and 169 transitions. [2024-06-27 21:07:08,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 301 transitions, 4487 flow [2024-06-27 21:07:10,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 301 transitions, 4213 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 21:07:10,074 INFO L231 Difference]: Finished difference. Result has 261 places, 270 transitions, 3774 flow [2024-06-27 21:07:10,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3516, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3774, PETRI_PLACES=261, PETRI_TRANSITIONS=270} [2024-06-27 21:07:10,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-27 21:07:10,075 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 270 transitions, 3774 flow [2024-06-27 21:07:10,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:10,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:10,075 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, 1] [2024-06-27 21:07:10,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:07:10,075 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 21:07:10,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1879040352, now seen corresponding path program 1 times [2024-06-27 21:07:10,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:10,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903772170] [2024-06-27 21:07:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:10,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:12,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:12,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903772170] [2024-06-27 21:07:12,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903772170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:12,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:12,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:12,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545782364] [2024-06-27 21:07:12,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:12,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:12,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:12,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:12,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:12,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 270 transitions, 3774 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:12,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:12,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:12,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:15,702 INFO L124 PetriNetUnfolderBase]: 7957/12960 cut-off events. [2024-06-27 21:07:15,702 INFO L125 PetriNetUnfolderBase]: For 1052361/1052372 co-relation queries the response was YES. [2024-06-27 21:07:15,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86408 conditions, 12960 events. 7957/12960 cut-off events. For 1052361/1052372 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 93246 event pairs, 3298 based on Foata normal form. 50/13006 useless extension candidates. Maximal degree in co-relation 86279. Up to 7703 conditions per place. [2024-06-27 21:07:15,837 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 266 selfloop transitions, 142 changer transitions 17/429 dead transitions. [2024-06-27 21:07:15,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 429 transitions, 6253 flow [2024-06-27 21:07:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:07:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:07:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 248 transitions. [2024-06-27 21:07:15,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652908067542214 [2024-06-27 21:07:15,839 INFO L175 Difference]: Start difference. First operand has 261 places, 270 transitions, 3774 flow. Second operand 13 states and 248 transitions. [2024-06-27 21:07:15,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 429 transitions, 6253 flow [2024-06-27 21:07:17,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 429 transitions, 5825 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 21:07:17,775 INFO L231 Difference]: Finished difference. Result has 268 places, 309 transitions, 4437 flow [2024-06-27 21:07:17,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4437, PETRI_PLACES=268, PETRI_TRANSITIONS=309} [2024-06-27 21:07:17,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-27 21:07:17,775 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 309 transitions, 4437 flow [2024-06-27 21:07:17,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:17,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:17,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:17,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:07:17,776 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 21:07:17,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:17,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1123050118, now seen corresponding path program 2 times [2024-06-27 21:07:17,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:17,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224318904] [2024-06-27 21:07:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:17,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:21,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:21,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224318904] [2024-06-27 21:07:21,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224318904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:21,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:21,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:21,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139154519] [2024-06-27 21:07:21,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:21,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:21,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:21,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:21,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 309 transitions, 4437 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:21,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:21,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:21,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:24,444 INFO L124 PetriNetUnfolderBase]: 7697/12544 cut-off events. [2024-06-27 21:07:24,444 INFO L125 PetriNetUnfolderBase]: For 1020096/1020107 co-relation queries the response was YES. [2024-06-27 21:07:24,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84161 conditions, 12544 events. 7697/12544 cut-off events. For 1020096/1020107 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 89764 event pairs, 2829 based on Foata normal form. 50/12590 useless extension candidates. Maximal degree in co-relation 84028. Up to 7547 conditions per place. [2024-06-27 21:07:24,588 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 222 selfloop transitions, 142 changer transitions 17/385 dead transitions. [2024-06-27 21:07:24,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 385 transitions, 5797 flow [2024-06-27 21:07:24,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:07:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:07:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 21:07:24,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 21:07:24,589 INFO L175 Difference]: Start difference. First operand has 268 places, 309 transitions, 4437 flow. Second operand 11 states and 209 transitions. [2024-06-27 21:07:24,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 385 transitions, 5797 flow [2024-06-27 21:07:26,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 385 transitions, 5644 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:07:26,129 INFO L231 Difference]: Finished difference. Result has 271 places, 305 transitions, 4537 flow [2024-06-27 21:07:26,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4290, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4537, PETRI_PLACES=271, PETRI_TRANSITIONS=305} [2024-06-27 21:07:26,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-27 21:07:26,129 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 305 transitions, 4537 flow [2024-06-27 21:07:26,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:26,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:26,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:26,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:07:26,130 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:26,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:26,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1199820828, now seen corresponding path program 3 times [2024-06-27 21:07:26,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:26,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270505043] [2024-06-27 21:07:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:26,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:29,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:29,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270505043] [2024-06-27 21:07:29,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270505043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:29,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:29,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:29,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949242178] [2024-06-27 21:07:29,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:29,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:29,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:29,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 305 transitions, 4537 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:29,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:29,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:29,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:33,188 INFO L124 PetriNetUnfolderBase]: 9041/14646 cut-off events. [2024-06-27 21:07:33,188 INFO L125 PetriNetUnfolderBase]: For 1558879/1558890 co-relation queries the response was YES. [2024-06-27 21:07:33,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110401 conditions, 14646 events. 9041/14646 cut-off events. For 1558879/1558890 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 106519 event pairs, 2637 based on Foata normal form. 26/14668 useless extension candidates. Maximal degree in co-relation 110269. Up to 8149 conditions per place. [2024-06-27 21:07:33,374 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 209 selfloop transitions, 149 changer transitions 15/377 dead transitions. [2024-06-27 21:07:33,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 377 transitions, 5893 flow [2024-06-27 21:07:33,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:07:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:07:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-27 21:07:33,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-27 21:07:33,375 INFO L175 Difference]: Start difference. First operand has 271 places, 305 transitions, 4537 flow. Second operand 11 states and 202 transitions. [2024-06-27 21:07:33,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 377 transitions, 5893 flow [2024-06-27 21:07:35,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 377 transitions, 5594 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 21:07:35,780 INFO L231 Difference]: Finished difference. Result has 271 places, 303 transitions, 4537 flow [2024-06-27 21:07:35,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4250, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4537, PETRI_PLACES=271, PETRI_TRANSITIONS=303} [2024-06-27 21:07:35,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-27 21:07:35,781 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 303 transitions, 4537 flow [2024-06-27 21:07:35,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:35,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:35,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:35,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:07:35,781 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:35,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1545568002, now seen corresponding path program 4 times [2024-06-27 21:07:35,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:35,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631214704] [2024-06-27 21:07:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:35,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:38,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:38,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631214704] [2024-06-27 21:07:38,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631214704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:38,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:38,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:38,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008409321] [2024-06-27 21:07:38,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:38,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:38,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:38,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:38,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 303 transitions, 4537 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:38,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:38,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:38,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:43,138 INFO L124 PetriNetUnfolderBase]: 8689/14093 cut-off events. [2024-06-27 21:07:43,139 INFO L125 PetriNetUnfolderBase]: For 1487523/1487534 co-relation queries the response was YES. [2024-06-27 21:07:43,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102012 conditions, 14093 events. 8689/14093 cut-off events. For 1487523/1487534 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 102765 event pairs, 4138 based on Foata normal form. 106/14195 useless extension candidates. Maximal degree in co-relation 101880. Up to 10319 conditions per place. [2024-06-27 21:07:43,303 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 132 changer transitions 24/374 dead transitions. [2024-06-27 21:07:43,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 374 transitions, 5707 flow [2024-06-27 21:07:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:07:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:07:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-27 21:07:43,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369918699186992 [2024-06-27 21:07:43,304 INFO L175 Difference]: Start difference. First operand has 271 places, 303 transitions, 4537 flow. Second operand 12 states and 215 transitions. [2024-06-27 21:07:43,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 374 transitions, 5707 flow [2024-06-27 21:07:45,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 374 transitions, 5405 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-27 21:07:45,403 INFO L231 Difference]: Finished difference. Result has 269 places, 292 transitions, 4360 flow [2024-06-27 21:07:45,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4239, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4360, PETRI_PLACES=269, PETRI_TRANSITIONS=292} [2024-06-27 21:07:45,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-27 21:07:45,403 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 292 transitions, 4360 flow [2024-06-27 21:07:45,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:45,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:45,403 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, 1, 1] [2024-06-27 21:07:45,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:07:45,404 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:45,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:45,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1554138882, now seen corresponding path program 5 times [2024-06-27 21:07:45,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:45,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540495930] [2024-06-27 21:07:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:45,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:48,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:48,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540495930] [2024-06-27 21:07:48,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540495930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:48,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:48,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:48,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052362710] [2024-06-27 21:07:48,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:48,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:48,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:48,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:48,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:48,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:48,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 292 transitions, 4360 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:48,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:48,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:48,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:52,551 INFO L124 PetriNetUnfolderBase]: 7873/12797 cut-off events. [2024-06-27 21:07:52,552 INFO L125 PetriNetUnfolderBase]: For 1294432/1294443 co-relation queries the response was YES. [2024-06-27 21:07:52,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90734 conditions, 12797 events. 7873/12797 cut-off events. For 1294432/1294443 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 92322 event pairs, 4056 based on Foata normal form. 118/12911 useless extension candidates. Maximal degree in co-relation 90604. Up to 11127 conditions per place. [2024-06-27 21:07:52,685 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 191 selfloop transitions, 121 changer transitions 37/353 dead transitions. [2024-06-27 21:07:52,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 353 transitions, 5318 flow [2024-06-27 21:07:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:07:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:07:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-27 21:07:52,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41260162601626016 [2024-06-27 21:07:52,686 INFO L175 Difference]: Start difference. First operand has 269 places, 292 transitions, 4360 flow. Second operand 12 states and 203 transitions. [2024-06-27 21:07:52,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 353 transitions, 5318 flow [2024-06-27 21:07:54,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 353 transitions, 5052 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-27 21:07:54,742 INFO L231 Difference]: Finished difference. Result has 266 places, 280 transitions, 4194 flow [2024-06-27 21:07:54,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4098, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4194, PETRI_PLACES=266, PETRI_TRANSITIONS=280} [2024-06-27 21:07:54,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-27 21:07:54,743 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 280 transitions, 4194 flow [2024-06-27 21:07:54,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:54,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:54,743 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, 1] [2024-06-27 21:07:54,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:07:54,743 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 21:07:54,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:54,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1566302870, now seen corresponding path program 6 times [2024-06-27 21:07:54,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:54,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347191914] [2024-06-27 21:07:54,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:54,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:58,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:58,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347191914] [2024-06-27 21:07:58,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347191914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:58,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:58,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:07:58,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104876697] [2024-06-27 21:07:58,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:58,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:07:58,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:58,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:07:58,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:07:58,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:07:58,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 280 transitions, 4194 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:58,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:58,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:07:58,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:02,038 INFO L124 PetriNetUnfolderBase]: 8039/13013 cut-off events. [2024-06-27 21:08:02,038 INFO L125 PetriNetUnfolderBase]: For 1248112/1248123 co-relation queries the response was YES. [2024-06-27 21:08:02,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96588 conditions, 13013 events. 8039/13013 cut-off events. For 1248112/1248123 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 93341 event pairs, 3814 based on Foata normal form. 30/13039 useless extension candidates. Maximal degree in co-relation 96460. Up to 9917 conditions per place. [2024-06-27 21:08:02,169 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 198 selfloop transitions, 122 changer transitions 13/337 dead transitions. [2024-06-27 21:08:02,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 337 transitions, 5262 flow [2024-06-27 21:08:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:08:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:08:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 21:08:02,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685144124168516 [2024-06-27 21:08:02,170 INFO L175 Difference]: Start difference. First operand has 266 places, 280 transitions, 4194 flow. Second operand 11 states and 188 transitions. [2024-06-27 21:08:02,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 337 transitions, 5262 flow [2024-06-27 21:08:03,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 337 transitions, 4980 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-27 21:08:03,833 INFO L231 Difference]: Finished difference. Result has 259 places, 277 transitions, 4104 flow [2024-06-27 21:08:03,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3922, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4104, PETRI_PLACES=259, PETRI_TRANSITIONS=277} [2024-06-27 21:08:03,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-27 21:08:03,834 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 277 transitions, 4104 flow [2024-06-27 21:08:03,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:03,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:03,834 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, 1] [2024-06-27 21:08:03,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:08:03,834 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:03,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1906654996, now seen corresponding path program 7 times [2024-06-27 21:08:03,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:03,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235555345] [2024-06-27 21:08:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:03,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:07,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:07,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235555345] [2024-06-27 21:08:07,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235555345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:07,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:07,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:07,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531855000] [2024-06-27 21:08:07,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:07,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:07,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:07,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:08:07,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 277 transitions, 4104 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:07,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:07,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:08:07,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:10,822 INFO L124 PetriNetUnfolderBase]: 7671/12423 cut-off events. [2024-06-27 21:08:10,822 INFO L125 PetriNetUnfolderBase]: For 1102706/1102717 co-relation queries the response was YES. [2024-06-27 21:08:10,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91114 conditions, 12423 events. 7671/12423 cut-off events. For 1102706/1102717 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 88567 event pairs, 3992 based on Foata normal form. 30/12449 useless extension candidates. Maximal degree in co-relation 90988. Up to 11351 conditions per place. [2024-06-27 21:08:10,965 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 184 selfloop transitions, 111 changer transitions 23/322 dead transitions. [2024-06-27 21:08:10,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 322 transitions, 4912 flow [2024-06-27 21:08:10,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:08:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:08:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-27 21:08:10,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991130820399113 [2024-06-27 21:08:10,967 INFO L175 Difference]: Start difference. First operand has 259 places, 277 transitions, 4104 flow. Second operand 11 states and 180 transitions. [2024-06-27 21:08:10,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 322 transitions, 4912 flow [2024-06-27 21:08:12,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 322 transitions, 4655 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 21:08:12,679 INFO L231 Difference]: Finished difference. Result has 256 places, 266 transitions, 3900 flow [2024-06-27 21:08:12,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3900, PETRI_PLACES=256, PETRI_TRANSITIONS=266} [2024-06-27 21:08:12,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-27 21:08:12,680 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 266 transitions, 3900 flow [2024-06-27 21:08:12,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:12,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:12,680 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, 1] [2024-06-27 21:08:12,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:08:12,681 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:08:12,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash -752572046, now seen corresponding path program 8 times [2024-06-27 21:08:12,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:12,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823620159] [2024-06-27 21:08:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:12,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms