./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe000_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/safe000_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/safe000_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe000_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 20:48:19,194 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:48:19,258 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:48:19,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:48:19,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:48:19,286 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:48:19,286 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:48:19,286 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:48:19,287 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:48:19,290 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:48:19,290 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:48:19,290 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:48:19,291 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:48:19,292 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:48:19,292 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:48:19,293 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:48:19,293 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:48:19,293 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:48:19,293 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:48:19,293 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:48:19,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:48:19,294 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:48:19,294 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:48:19,294 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:48:19,295 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:48:19,295 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:48:19,295 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:48:19,295 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:48:19,296 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:48:19,296 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:48:19,297 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:48:19,297 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:48:19,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:48:19,297 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:48:19,297 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:48:19,298 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:48:19,298 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:48:19,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:48:19,298 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:48:19,298 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:48:19,298 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:48:19,299 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:48:19,299 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:48:19,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:48:19,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:48:19,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:48:19,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:48:19,476 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:48:19,476 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:48:19,477 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe000_power.oepc.yml/witness.yml [2024-06-27 20:48:19,726 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:48:19,726 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:48:19,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i [2024-06-27 20:48:20,765 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:48:21,009 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:48:21,009 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_power.oepc.i [2024-06-27 20:48:21,029 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb2194ae/0fba0679c6c64b7f97ebbb208d2d2fff/FLAG1640a0886 [2024-06-27 20:48:21,337 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb2194ae/0fba0679c6c64b7f97ebbb208d2d2fff [2024-06-27 20:48:21,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:48:21,338 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:48:21,339 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:48:21,339 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:48:21,343 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:48:21,343 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:48:19" (1/2) ... [2024-06-27 20:48:21,344 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d7025a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:48:21, skipping insertion in model container [2024-06-27 20:48:21,344 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:48:19" (1/2) ... [2024-06-27 20:48:21,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45925ac7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:48:21, skipping insertion in model container [2024-06-27 20:48:21,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:48:21" (2/2) ... [2024-06-27 20:48:21,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d7025a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21, skipping insertion in model container [2024-06-27 20:48:21,346 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:48:21" (2/2) ... [2024-06-27 20:48:21,346 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:48:21,487 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:48:21,488 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 20:48:21,488 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 20:48:21,488 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 20:48:21,488 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:48:21,488 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 20:48:21,511 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:48:21,744 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:48:21,761 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:48:21,914 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:48:21,972 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:48:21,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21 WrapperNode [2024-06-27 20:48:21,974 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:48:21,975 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:48:21,975 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:48:21,975 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:48:21,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:21,997 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:22,032 INFO L138 Inliner]: procedures = 175, calls = 91, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 225 [2024-06-27 20:48:22,036 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:48:22,036 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:48:22,036 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:48:22,037 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:48:22,045 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:22,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:22,057 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:22,071 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-27 20:48:22,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:22,072 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:22,082 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:22,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:22,086 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:22,088 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:22,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:48:22,092 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:48:22,092 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:48:22,092 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:48:22,093 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (1/1) ... [2024-06-27 20:48:22,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:48:22,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:48:22,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:48:22,131 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 20:48:22,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 20:48:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 20:48:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 20:48:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 20:48:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:48:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:48:22,143 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:48:22,143 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:48:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:48:22,144 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:48:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:48:22,144 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:48:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:48:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 20:48:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:48:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:48:22,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:48:22,146 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 20:48:22,265 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:48:22,266 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:48:22,754 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:48:22,755 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:48:23,128 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:48:23,128 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:48:23,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:48:23 BoogieIcfgContainer [2024-06-27 20:48:23,129 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:48:23,131 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:48:23,131 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:48:23,133 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:48:23,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:48:19" (1/4) ... [2024-06-27 20:48:23,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30783b59 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:48:23, skipping insertion in model container [2024-06-27 20:48:23,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:48:21" (2/4) ... [2024-06-27 20:48:23,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30783b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:48:23, skipping insertion in model container [2024-06-27 20:48:23,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:48:21" (3/4) ... [2024-06-27 20:48:23,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30783b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:48:23, skipping insertion in model container [2024-06-27 20:48:23,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:48:23" (4/4) ... [2024-06-27 20:48:23,137 INFO L112 eAbstractionObserver]: Analyzing ICFG safe000_power.oepc.i [2024-06-27 20:48:23,151 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:48:23,151 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:48:23,151 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:48:23,245 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:48:23,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:48:23,309 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 20:48:23,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:48:23,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:48:23,312 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:48:23,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 20:48:23,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:48:23,332 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;@12671580, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:48:23,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:48:23,336 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:48:23,336 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:48:23,336 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:48:23,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:23,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:48:23,337 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 20:48:23,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:23,344 INFO L85 PathProgramCache]: Analyzing trace with hash 887438332, now seen corresponding path program 1 times [2024-06-27 20:48:23,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:23,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28180718] [2024-06-27 20:48:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:25,212 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 20:48:25,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:25,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28180718] [2024-06-27 20:48:25,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28180718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:25,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:25,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:48:25,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407119761] [2024-06-27 20:48:25,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:25,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:48:25,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:25,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:48:25,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:48:25,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:48:25,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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 20:48:25,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:25,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:48:25,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:25,793 INFO L124 PetriNetUnfolderBase]: 1157/1772 cut-off events. [2024-06-27 20:48:25,793 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 20:48:25,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 1772 events. 1157/1772 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8374 event pairs, 709 based on Foata normal form. 2/1743 useless extension candidates. Maximal degree in co-relation 3581. Up to 1741 conditions per place. [2024-06-27 20:48:25,805 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-27 20:48:25,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-27 20:48:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:48:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:48:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-27 20:48:25,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 20:48:25,815 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-27 20:48:25,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-27 20:48:25,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:48:25,819 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 20:48:25,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 20:48:25,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 20:48:25,823 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 20:48:25,823 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 20:48:25,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:25,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:25,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:48:25,824 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 20:48:25,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:25,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1870217157, now seen corresponding path program 1 times [2024-06-27 20:48:25,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:25,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770246012] [2024-06-27 20:48:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:25,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:27,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:27,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770246012] [2024-06-27 20:48:27,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770246012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:27,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:27,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:48:27,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641897008] [2024-06-27 20:48:27,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:27,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:48:27,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:27,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:48:27,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:48:27,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:48:27,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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 20:48:27,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:27,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:48:27,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:28,494 INFO L124 PetriNetUnfolderBase]: 1148/1758 cut-off events. [2024-06-27 20:48:28,494 INFO L125 PetriNetUnfolderBase]: For 327/330 co-relation queries the response was YES. [2024-06-27 20:48:28,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1758 events. 1148/1758 cut-off events. For 327/330 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8278 event pairs, 585 based on Foata normal form. 6/1762 useless extension candidates. Maximal degree in co-relation 4046. Up to 1704 conditions per place. [2024-06-27 20:48:28,505 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-27 20:48:28,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-27 20:48:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:48:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:48:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-27 20:48:28,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-27 20:48:28,510 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-27 20:48:28,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-27 20:48:28,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:48:28,513 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 20:48:28,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 20:48:28,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 20:48:28,516 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 20:48:28,516 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 20:48:28,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:28,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:28,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:48:28,520 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 20:48:28,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2142155780, now seen corresponding path program 1 times [2024-06-27 20:48:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:28,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457292367] [2024-06-27 20:48:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:28,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:30,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:30,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457292367] [2024-06-27 20:48:30,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457292367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:30,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:30,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:48:30,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125192964] [2024-06-27 20:48:30,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:30,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:48:30,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:30,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:48:30,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:48:30,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:30,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 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 20:48:30,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:30,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:30,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:31,725 INFO L124 PetriNetUnfolderBase]: 1375/2089 cut-off events. [2024-06-27 20:48:31,725 INFO L125 PetriNetUnfolderBase]: For 1062/1062 co-relation queries the response was YES. [2024-06-27 20:48:31,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5347 conditions, 2089 events. 1375/2089 cut-off events. For 1062/1062 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9824 event pairs, 547 based on Foata normal form. 4/2092 useless extension candidates. Maximal degree in co-relation 5333. Up to 2012 conditions per place. [2024-06-27 20:48:31,733 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-27 20:48:31,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 395 flow [2024-06-27 20:48:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:48:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:48:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-27 20:48:31,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 20:48:31,735 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 110 transitions. [2024-06-27 20:48:31,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 395 flow [2024-06-27 20:48:31,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 374 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 20:48:31,737 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 208 flow [2024-06-27 20:48:31,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-27 20:48:31,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 20:48:31,738 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 208 flow [2024-06-27 20:48:31,738 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 20:48:31,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:31,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:31,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:48:31,739 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 20:48:31,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:31,739 INFO L85 PathProgramCache]: Analyzing trace with hash 391257413, now seen corresponding path program 1 times [2024-06-27 20:48:31,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:31,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930577449] [2024-06-27 20:48:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:31,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:34,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:34,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930577449] [2024-06-27 20:48:34,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930577449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:34,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:34,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:48:34,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606222919] [2024-06-27 20:48:34,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:34,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:48:34,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:34,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:48:34,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:48:34,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:34,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 208 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 20:48:34,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:34,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:34,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:35,416 INFO L124 PetriNetUnfolderBase]: 1361/2067 cut-off events. [2024-06-27 20:48:35,417 INFO L125 PetriNetUnfolderBase]: For 1822/1822 co-relation queries the response was YES. [2024-06-27 20:48:35,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5847 conditions, 2067 events. 1361/2067 cut-off events. For 1822/1822 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9742 event pairs, 384 based on Foata normal form. 8/2074 useless extension candidates. Maximal degree in co-relation 5830. Up to 1942 conditions per place. [2024-06-27 20:48:35,426 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-06-27 20:48:35,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 462 flow [2024-06-27 20:48:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:48:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:48:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 20:48:35,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:48:35,427 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 208 flow. Second operand 6 states and 126 transitions. [2024-06-27 20:48:35,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 462 flow [2024-06-27 20:48:35,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 458 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 20:48:35,431 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 243 flow [2024-06-27 20:48:35,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-27 20:48:35,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-27 20:48:35,432 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 243 flow [2024-06-27 20:48:35,432 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 20:48:35,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:35,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:35,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:48:35,432 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 20:48:35,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:35,433 INFO L85 PathProgramCache]: Analyzing trace with hash -920562115, now seen corresponding path program 1 times [2024-06-27 20:48:35,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:35,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743079378] [2024-06-27 20:48:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:36,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743079378] [2024-06-27 20:48:37,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743079378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:37,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:37,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:48:37,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568697854] [2024-06-27 20:48:37,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:37,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:48:37,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:37,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:48:37,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:48:37,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:48:37,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 243 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 20:48:37,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:37,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:48:37,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:37,865 INFO L124 PetriNetUnfolderBase]: 1351/2052 cut-off events. [2024-06-27 20:48:37,865 INFO L125 PetriNetUnfolderBase]: For 2816/2816 co-relation queries the response was YES. [2024-06-27 20:48:37,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6222 conditions, 2052 events. 1351/2052 cut-off events. For 2816/2816 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9420 event pairs, 554 based on Foata normal form. 4/2055 useless extension candidates. Maximal degree in co-relation 6201. Up to 1994 conditions per place. [2024-06-27 20:48:37,878 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 59 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-27 20:48:37,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 456 flow [2024-06-27 20:48:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:48:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:48:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-27 20:48:37,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 20:48:37,879 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 243 flow. Second operand 5 states and 87 transitions. [2024-06-27 20:48:37,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 456 flow [2024-06-27 20:48:37,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 423 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:48:37,883 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 289 flow [2024-06-27 20:48:37,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-27 20:48:37,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-27 20:48:37,884 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 289 flow [2024-06-27 20:48:37,884 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 20:48:37,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:37,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:37,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:48:37,885 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 20:48:37,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash 96459160, now seen corresponding path program 1 times [2024-06-27 20:48:37,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:37,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92537067] [2024-06-27 20:48:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:37,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:40,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:40,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92537067] [2024-06-27 20:48:40,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92537067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:40,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:40,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:48:40,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408961656] [2024-06-27 20:48:40,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:40,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:48:40,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:40,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:48:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:48:40,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:48:40,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 289 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 20:48:40,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:40,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:48:40,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:41,800 INFO L124 PetriNetUnfolderBase]: 1369/2088 cut-off events. [2024-06-27 20:48:41,801 INFO L125 PetriNetUnfolderBase]: For 3831/3833 co-relation queries the response was YES. [2024-06-27 20:48:41,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6788 conditions, 2088 events. 1369/2088 cut-off events. For 3831/3833 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9812 event pairs, 494 based on Foata normal form. 5/2092 useless extension candidates. Maximal degree in co-relation 6764. Up to 1926 conditions per place. [2024-06-27 20:48:41,814 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-27 20:48:41,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 633 flow [2024-06-27 20:48:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:48:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:48:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:48:41,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 20:48:41,816 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 289 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:48:41,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 633 flow [2024-06-27 20:48:41,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 99 transitions, 629 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 20:48:41,821 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 387 flow [2024-06-27 20:48:41,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-27 20:48:41,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-27 20:48:41,824 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 387 flow [2024-06-27 20:48:41,824 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 20:48:41,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:41,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:41,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:48:41,825 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 20:48:41,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash -74238434, now seen corresponding path program 1 times [2024-06-27 20:48:41,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:41,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813627405] [2024-06-27 20:48:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:41,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:44,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:44,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813627405] [2024-06-27 20:48:44,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813627405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:44,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:44,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:48:44,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014103928] [2024-06-27 20:48:44,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:44,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:48:44,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:48:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:48:44,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:48:44,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 387 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 20:48:44,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:44,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:48:44,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:45,974 INFO L124 PetriNetUnfolderBase]: 1615/2434 cut-off events. [2024-06-27 20:48:45,974 INFO L125 PetriNetUnfolderBase]: For 6160/6162 co-relation queries the response was YES. [2024-06-27 20:48:45,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8482 conditions, 2434 events. 1615/2434 cut-off events. For 6160/6162 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11445 event pairs, 510 based on Foata normal form. 12/2445 useless extension candidates. Maximal degree in co-relation 8455. Up to 2148 conditions per place. [2024-06-27 20:48:45,988 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 89 selfloop transitions, 33 changer transitions 0/126 dead transitions. [2024-06-27 20:48:45,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 126 transitions, 881 flow [2024-06-27 20:48:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:48:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:48:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:48:45,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:48:45,990 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 387 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:48:45,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 126 transitions, 881 flow [2024-06-27 20:48:45,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 126 transitions, 844 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:48:45,995 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 544 flow [2024-06-27 20:48:45,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=544, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-27 20:48:45,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-27 20:48:45,996 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 544 flow [2024-06-27 20:48:45,996 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 20:48:45,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:45,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:45,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:48:45,997 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 20:48:45,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:45,997 INFO L85 PathProgramCache]: Analyzing trace with hash -74238620, now seen corresponding path program 2 times [2024-06-27 20:48:45,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:45,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169886529] [2024-06-27 20:48:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:45,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:48,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:48,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169886529] [2024-06-27 20:48:48,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169886529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:48,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:48,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:48:48,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837769494] [2024-06-27 20:48:48,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:48,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:48:48,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:48:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:48:48,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:48:48,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 544 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 20:48:48,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:48,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:48:48,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:49,737 INFO L124 PetriNetUnfolderBase]: 1633/2468 cut-off events. [2024-06-27 20:48:49,738 INFO L125 PetriNetUnfolderBase]: For 8744/8746 co-relation queries the response was YES. [2024-06-27 20:48:49,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9898 conditions, 2468 events. 1633/2468 cut-off events. For 8744/8746 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11691 event pairs, 523 based on Foata normal form. 5/2472 useless extension candidates. Maximal degree in co-relation 9867. Up to 2334 conditions per place. [2024-06-27 20:48:49,788 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 22 changer transitions 0/113 dead transitions. [2024-06-27 20:48:49,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 880 flow [2024-06-27 20:48:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:48:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:48:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:48:49,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 20:48:49,790 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 544 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:48:49,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 880 flow [2024-06-27 20:48:49,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 831 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 20:48:49,801 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 579 flow [2024-06-27 20:48:49,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=579, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-27 20:48:49,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-27 20:48:49,803 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 579 flow [2024-06-27 20:48:49,803 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 20:48:49,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:49,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:49,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:48:49,804 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 20:48:49,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash 278911762, now seen corresponding path program 3 times [2024-06-27 20:48:49,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:49,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200132335] [2024-06-27 20:48:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:49,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:52,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:52,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200132335] [2024-06-27 20:48:52,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200132335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:52,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:52,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:48:52,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481425180] [2024-06-27 20:48:52,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:52,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:48:52,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:52,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:48:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:48:52,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:48:52,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 579 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 20:48:52,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:52,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:48:52,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:53,567 INFO L124 PetriNetUnfolderBase]: 1625/2457 cut-off events. [2024-06-27 20:48:53,567 INFO L125 PetriNetUnfolderBase]: For 10139/10141 co-relation queries the response was YES. [2024-06-27 20:48:53,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10066 conditions, 2457 events. 1625/2457 cut-off events. For 10139/10141 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11626 event pairs, 525 based on Foata normal form. 5/2461 useless extension candidates. Maximal degree in co-relation 10033. Up to 2283 conditions per place. [2024-06-27 20:48:53,579 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 80 selfloop transitions, 27 changer transitions 0/111 dead transitions. [2024-06-27 20:48:53,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 875 flow [2024-06-27 20:48:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:48:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:48:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 20:48:53,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:48:53,581 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 579 flow. Second operand 6 states and 114 transitions. [2024-06-27 20:48:53,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 875 flow [2024-06-27 20:48:53,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 811 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:48:53,595 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 585 flow [2024-06-27 20:48:53,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-27 20:48:53,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-27 20:48:53,596 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 585 flow [2024-06-27 20:48:53,596 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 20:48:53,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:53,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:53,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:48:53,597 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 20:48:53,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash -952887574, now seen corresponding path program 2 times [2024-06-27 20:48:53,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:53,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161559194] [2024-06-27 20:48:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:53,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:55,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:55,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161559194] [2024-06-27 20:48:55,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161559194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:55,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:55,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:48:55,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582346050] [2024-06-27 20:48:55,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:55,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:48:55,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:55,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:48:55,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:48:55,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:48:55,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 585 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 20:48:55,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:55,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:48:55,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:56,913 INFO L124 PetriNetUnfolderBase]: 1615/2441 cut-off events. [2024-06-27 20:48:56,914 INFO L125 PetriNetUnfolderBase]: For 11840/11850 co-relation queries the response was YES. [2024-06-27 20:48:56,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10229 conditions, 2441 events. 1615/2441 cut-off events. For 11840/11850 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11406 event pairs, 552 based on Foata normal form. 14/2454 useless extension candidates. Maximal degree in co-relation 10195. Up to 2248 conditions per place. [2024-06-27 20:48:56,929 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 94 selfloop transitions, 22 changer transitions 0/120 dead transitions. [2024-06-27 20:48:56,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 120 transitions, 1024 flow [2024-06-27 20:48:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:48:56,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:48:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 20:48:56,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-27 20:48:56,931 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 585 flow. Second operand 6 states and 107 transitions. [2024-06-27 20:48:56,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 120 transitions, 1024 flow [2024-06-27 20:48:56,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 120 transitions, 952 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:48:56,940 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 719 flow [2024-06-27 20:48:56,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=719, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-27 20:48:56,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-27 20:48:56,941 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 719 flow [2024-06-27 20:48:56,941 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 20:48:56,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:56,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:56,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:48:56,942 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 20:48:56,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:56,942 INFO L85 PathProgramCache]: Analyzing trace with hash -937700674, now seen corresponding path program 3 times [2024-06-27 20:48:56,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:56,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800437724] [2024-06-27 20:48:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:56,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:59,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:59,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800437724] [2024-06-27 20:48:59,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800437724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:59,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:59,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:48:59,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55231257] [2024-06-27 20:48:59,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:59,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:48:59,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:59,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:48:59,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:48:59,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:48:59,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 719 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 20:48:59,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:59,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:48:59,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:00,350 INFO L124 PetriNetUnfolderBase]: 1627/2455 cut-off events. [2024-06-27 20:49:00,350 INFO L125 PetriNetUnfolderBase]: For 12330/12332 co-relation queries the response was YES. [2024-06-27 20:49:00,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10722 conditions, 2455 events. 1627/2455 cut-off events. For 12330/12332 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11446 event pairs, 557 based on Foata normal form. 12/2466 useless extension candidates. Maximal degree in co-relation 10685. Up to 2162 conditions per place. [2024-06-27 20:49:00,364 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 45 changer transitions 0/129 dead transitions. [2024-06-27 20:49:00,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 129 transitions, 1102 flow [2024-06-27 20:49:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:49:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:49:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:49:00,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 20:49:00,366 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 719 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:49:00,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 129 transitions, 1102 flow [2024-06-27 20:49:00,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 1078 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 20:49:00,378 INFO L231 Difference]: Finished difference. Result has 87 places, 100 transitions, 873 flow [2024-06-27 20:49:00,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=873, PETRI_PLACES=87, PETRI_TRANSITIONS=100} [2024-06-27 20:49:00,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-27 20:49:00,379 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 100 transitions, 873 flow [2024-06-27 20:49:00,379 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 20:49:00,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:00,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:00,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:49:00,380 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 20:49:00,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash -952648006, now seen corresponding path program 1 times [2024-06-27 20:49:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:00,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914679512] [2024-06-27 20:49:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:00,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:02,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:02,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914679512] [2024-06-27 20:49:02,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914679512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:02,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:02,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:02,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133709666] [2024-06-27 20:49:02,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:02,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:02,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:02,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:02,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:02,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:02,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 873 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 20:49:02,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:02,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:02,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:03,611 INFO L124 PetriNetUnfolderBase]: 1619/2443 cut-off events. [2024-06-27 20:49:03,612 INFO L125 PetriNetUnfolderBase]: For 14529/14531 co-relation queries the response was YES. [2024-06-27 20:49:03,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11330 conditions, 2443 events. 1619/2443 cut-off events. For 14529/14531 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11341 event pairs, 532 based on Foata normal form. 6/2448 useless extension candidates. Maximal degree in co-relation 11289. Up to 2351 conditions per place. [2024-06-27 20:49:03,626 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 109 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-27 20:49:03,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 1182 flow [2024-06-27 20:49:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:49:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:49:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 20:49:03,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:49:03,645 INFO L175 Difference]: Start difference. First operand has 87 places, 100 transitions, 873 flow. Second operand 6 states and 102 transitions. [2024-06-27 20:49:03,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 1182 flow [2024-06-27 20:49:03,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1101 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:03,662 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 839 flow [2024-06-27 20:49:03,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=839, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2024-06-27 20:49:03,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-27 20:49:03,663 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 839 flow [2024-06-27 20:49:03,663 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 20:49:03,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:03,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:03,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:49:03,663 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 20:49:03,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1187452637, now seen corresponding path program 1 times [2024-06-27 20:49:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:03,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761772682] [2024-06-27 20:49:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:03,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:06,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:06,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761772682] [2024-06-27 20:49:06,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761772682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:06,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:06,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:06,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605995449] [2024-06-27 20:49:06,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:06,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:06,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:06,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:06,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:06,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 839 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 20:49:06,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:06,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:06,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:07,901 INFO L124 PetriNetUnfolderBase]: 1847/2783 cut-off events. [2024-06-27 20:49:07,902 INFO L125 PetriNetUnfolderBase]: For 18274/18276 co-relation queries the response was YES. [2024-06-27 20:49:07,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12722 conditions, 2783 events. 1847/2783 cut-off events. For 18274/18276 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13256 event pairs, 547 based on Foata normal form. 12/2794 useless extension candidates. Maximal degree in co-relation 12680. Up to 2114 conditions per place. [2024-06-27 20:49:07,931 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 109 selfloop transitions, 67 changer transitions 0/180 dead transitions. [2024-06-27 20:49:07,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 180 transitions, 1573 flow [2024-06-27 20:49:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 20:49:07,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:49:07,950 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 839 flow. Second operand 11 states and 209 transitions. [2024-06-27 20:49:07,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 180 transitions, 1573 flow [2024-06-27 20:49:07,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 180 transitions, 1544 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:07,966 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 1102 flow [2024-06-27 20:49:07,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1102, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2024-06-27 20:49:07,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 20:49:07,966 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 1102 flow [2024-06-27 20:49:07,967 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 20:49:07,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:07,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:07,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:49:07,967 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 20:49:07,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:07,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1304587071, now seen corresponding path program 2 times [2024-06-27 20:49:07,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:07,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337270797] [2024-06-27 20:49:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:07,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:11,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:11,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337270797] [2024-06-27 20:49:11,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337270797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:11,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:11,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:11,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134024607] [2024-06-27 20:49:11,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:11,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:11,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:11,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:11,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:11,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:11,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 1102 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 20:49:11,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:11,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:11,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:12,658 INFO L124 PetriNetUnfolderBase]: 2016/3050 cut-off events. [2024-06-27 20:49:12,658 INFO L125 PetriNetUnfolderBase]: For 25162/25164 co-relation queries the response was YES. [2024-06-27 20:49:12,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15509 conditions, 3050 events. 2016/3050 cut-off events. For 25162/25164 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14784 event pairs, 602 based on Foata normal form. 12/3061 useless extension candidates. Maximal degree in co-relation 15464. Up to 2531 conditions per place. [2024-06-27 20:49:12,703 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 127 selfloop transitions, 56 changer transitions 0/187 dead transitions. [2024-06-27 20:49:12,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 187 transitions, 1870 flow [2024-06-27 20:49:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:49:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:49:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:49:12,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-27 20:49:12,705 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 1102 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:49:12,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 187 transitions, 1870 flow [2024-06-27 20:49:12,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 187 transitions, 1723 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:12,731 INFO L231 Difference]: Finished difference. Result has 103 places, 129 transitions, 1254 flow [2024-06-27 20:49:12,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1254, PETRI_PLACES=103, PETRI_TRANSITIONS=129} [2024-06-27 20:49:12,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-27 20:49:12,732 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 129 transitions, 1254 flow [2024-06-27 20:49:12,732 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 20:49:12,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:12,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:12,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:49:12,733 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 20:49:12,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:12,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1993577771, now seen corresponding path program 3 times [2024-06-27 20:49:12,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:12,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367617461] [2024-06-27 20:49:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:12,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:15,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:15,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367617461] [2024-06-27 20:49:15,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367617461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:15,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:15,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:15,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988998530] [2024-06-27 20:49:15,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:15,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:15,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:15,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:15,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:15,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 129 transitions, 1254 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 20:49:15,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:15,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:15,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:17,210 INFO L124 PetriNetUnfolderBase]: 2028/3076 cut-off events. [2024-06-27 20:49:17,211 INFO L125 PetriNetUnfolderBase]: For 28472/28474 co-relation queries the response was YES. [2024-06-27 20:49:17,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16244 conditions, 3076 events. 2028/3076 cut-off events. For 28472/28474 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15062 event pairs, 590 based on Foata normal form. 12/3087 useless extension candidates. Maximal degree in co-relation 16196. Up to 2544 conditions per place. [2024-06-27 20:49:17,230 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 133 selfloop transitions, 62 changer transitions 0/199 dead transitions. [2024-06-27 20:49:17,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 199 transitions, 1938 flow [2024-06-27 20:49:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:49:17,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:49:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 224 transitions. [2024-06-27 20:49:17,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:49:17,232 INFO L175 Difference]: Start difference. First operand has 103 places, 129 transitions, 1254 flow. Second operand 12 states and 224 transitions. [2024-06-27 20:49:17,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 199 transitions, 1938 flow [2024-06-27 20:49:17,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 199 transitions, 1845 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:17,270 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1350 flow [2024-06-27 20:49:17,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1350, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-27 20:49:17,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-27 20:49:17,271 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1350 flow [2024-06-27 20:49:17,271 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 20:49:17,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:17,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:17,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:49:17,272 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 20:49:17,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:17,272 INFO L85 PathProgramCache]: Analyzing trace with hash 532408047, now seen corresponding path program 4 times [2024-06-27 20:49:17,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:17,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146604218] [2024-06-27 20:49:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:17,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:19,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:19,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146604218] [2024-06-27 20:49:19,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146604218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:19,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:19,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:19,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612512328] [2024-06-27 20:49:19,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:19,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:19,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:19,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:19,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:19,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:19,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1350 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 20:49:19,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:19,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:19,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:21,662 INFO L124 PetriNetUnfolderBase]: 2018/3078 cut-off events. [2024-06-27 20:49:21,662 INFO L125 PetriNetUnfolderBase]: For 31355/31376 co-relation queries the response was YES. [2024-06-27 20:49:21,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16744 conditions, 3078 events. 2018/3078 cut-off events. For 31355/31376 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15201 event pairs, 593 based on Foata normal form. 25/3102 useless extension candidates. Maximal degree in co-relation 16694. Up to 2664 conditions per place. [2024-06-27 20:49:21,678 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 42 changer transitions 0/195 dead transitions. [2024-06-27 20:49:21,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 195 transitions, 2095 flow [2024-06-27 20:49:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:49:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:49:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:49:21,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:49:21,681 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1350 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:49:21,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 195 transitions, 2095 flow [2024-06-27 20:49:21,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 195 transitions, 1921 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-27 20:49:21,713 INFO L231 Difference]: Finished difference. Result has 110 places, 149 transitions, 1513 flow [2024-06-27 20:49:21,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1513, PETRI_PLACES=110, PETRI_TRANSITIONS=149} [2024-06-27 20:49:21,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-27 20:49:21,713 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 149 transitions, 1513 flow [2024-06-27 20:49:21,714 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 20:49:21,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:21,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:21,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:49:21,714 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 20:49:21,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:21,714 INFO L85 PathProgramCache]: Analyzing trace with hash 56337725, now seen corresponding path program 5 times [2024-06-27 20:49:21,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:21,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942628475] [2024-06-27 20:49:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:21,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:24,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:24,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942628475] [2024-06-27 20:49:24,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942628475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:24,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:24,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:24,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302785634] [2024-06-27 20:49:24,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:24,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:24,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:24,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:24,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:24,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:24,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 149 transitions, 1513 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 20:49:24,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:24,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:24,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:25,869 INFO L124 PetriNetUnfolderBase]: 2230/3402 cut-off events. [2024-06-27 20:49:25,869 INFO L125 PetriNetUnfolderBase]: For 37520/37522 co-relation queries the response was YES. [2024-06-27 20:49:25,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18924 conditions, 3402 events. 2230/3402 cut-off events. For 37520/37522 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17193 event pairs, 596 based on Foata normal form. 12/3413 useless extension candidates. Maximal degree in co-relation 18871. Up to 2590 conditions per place. [2024-06-27 20:49:25,893 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 121 selfloop transitions, 98 changer transitions 0/223 dead transitions. [2024-06-27 20:49:25,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 223 transitions, 2478 flow [2024-06-27 20:49:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:49:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:49:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:49:25,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 20:49:25,897 INFO L175 Difference]: Start difference. First operand has 110 places, 149 transitions, 1513 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:49:25,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 223 transitions, 2478 flow [2024-06-27 20:49:25,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 223 transitions, 2380 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:49:25,952 INFO L231 Difference]: Finished difference. Result has 116 places, 175 transitions, 2048 flow [2024-06-27 20:49:25,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2048, PETRI_PLACES=116, PETRI_TRANSITIONS=175} [2024-06-27 20:49:25,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-27 20:49:25,953 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 175 transitions, 2048 flow [2024-06-27 20:49:25,953 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 20:49:25,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:25,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:25,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:49:25,954 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 20:49:25,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:25,954 INFO L85 PathProgramCache]: Analyzing trace with hash 996046527, now seen corresponding path program 6 times [2024-06-27 20:49:25,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:25,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493886800] [2024-06-27 20:49:25,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:25,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:28,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:28,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493886800] [2024-06-27 20:49:28,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493886800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:28,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:28,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:28,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049249341] [2024-06-27 20:49:28,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:28,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:28,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:28,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:28,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:28,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 175 transitions, 2048 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 20:49:28,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:28,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:28,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:30,174 INFO L124 PetriNetUnfolderBase]: 2210/3386 cut-off events. [2024-06-27 20:49:30,175 INFO L125 PetriNetUnfolderBase]: For 42195/42197 co-relation queries the response was YES. [2024-06-27 20:49:30,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19869 conditions, 3386 events. 2210/3386 cut-off events. For 42195/42197 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17160 event pairs, 614 based on Foata normal form. 12/3397 useless extension candidates. Maximal degree in co-relation 19813. Up to 2579 conditions per place. [2024-06-27 20:49:30,199 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 128 selfloop transitions, 94 changer transitions 0/226 dead transitions. [2024-06-27 20:49:30,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 226 transitions, 2687 flow [2024-06-27 20:49:30,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:49:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:49:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:49:30,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 20:49:30,201 INFO L175 Difference]: Start difference. First operand has 116 places, 175 transitions, 2048 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:49:30,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 226 transitions, 2687 flow [2024-06-27 20:49:30,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 226 transitions, 2554 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:30,276 INFO L231 Difference]: Finished difference. Result has 122 places, 176 transitions, 2169 flow [2024-06-27 20:49:30,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2169, PETRI_PLACES=122, PETRI_TRANSITIONS=176} [2024-06-27 20:49:30,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-27 20:49:30,277 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 176 transitions, 2169 flow [2024-06-27 20:49:30,277 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 20:49:30,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:30,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:30,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:49:30,277 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:49:30,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:30,278 INFO L85 PathProgramCache]: Analyzing trace with hash -167829681, now seen corresponding path program 1 times [2024-06-27 20:49:30,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:30,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348399164] [2024-06-27 20:49:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:30,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:33,046 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 20:49:33,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:33,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348399164] [2024-06-27 20:49:33,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348399164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:33,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:33,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:33,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234952020] [2024-06-27 20:49:33,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:33,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:33,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:33,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:33,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:33,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 176 transitions, 2169 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 20:49:33,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:33,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:33,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:34,445 INFO L124 PetriNetUnfolderBase]: 2238/3420 cut-off events. [2024-06-27 20:49:34,446 INFO L125 PetriNetUnfolderBase]: For 46569/46571 co-relation queries the response was YES. [2024-06-27 20:49:34,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20927 conditions, 3420 events. 2238/3420 cut-off events. For 46569/46571 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17391 event pairs, 493 based on Foata normal form. 8/3427 useless extension candidates. Maximal degree in co-relation 20868. Up to 2990 conditions per place. [2024-06-27 20:49:34,472 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 47 changer transitions 0/224 dead transitions. [2024-06-27 20:49:34,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 224 transitions, 2903 flow [2024-06-27 20:49:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:49:34,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:49:34,474 INFO L175 Difference]: Start difference. First operand has 122 places, 176 transitions, 2169 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:49:34,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 224 transitions, 2903 flow [2024-06-27 20:49:34,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 224 transitions, 2788 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:49:34,537 INFO L231 Difference]: Finished difference. Result has 125 places, 180 transitions, 2239 flow [2024-06-27 20:49:34,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2239, PETRI_PLACES=125, PETRI_TRANSITIONS=180} [2024-06-27 20:49:34,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-27 20:49:34,538 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 180 transitions, 2239 flow [2024-06-27 20:49:34,538 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 20:49:34,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:34,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:34,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:49:34,539 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 20:49:34,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:34,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1791965001, now seen corresponding path program 2 times [2024-06-27 20:49:34,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:34,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927585403] [2024-06-27 20:49:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:34,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:37,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:37,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927585403] [2024-06-27 20:49:37,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927585403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:37,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:37,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:37,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381460127] [2024-06-27 20:49:37,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:37,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:37,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:37,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:37,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:37,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:37,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 180 transitions, 2239 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 20:49:37,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:37,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:37,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:39,479 INFO L124 PetriNetUnfolderBase]: 2266/3470 cut-off events. [2024-06-27 20:49:39,479 INFO L125 PetriNetUnfolderBase]: For 51362/51364 co-relation queries the response was YES. [2024-06-27 20:49:39,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21314 conditions, 3470 events. 2266/3470 cut-off events. For 51362/51364 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17670 event pairs, 653 based on Foata normal form. 8/3477 useless extension candidates. Maximal degree in co-relation 21254. Up to 3151 conditions per place. [2024-06-27 20:49:39,501 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 45 changer transitions 0/222 dead transitions. [2024-06-27 20:49:39,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 222 transitions, 2843 flow [2024-06-27 20:49:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:49:39,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:49:39,503 INFO L175 Difference]: Start difference. First operand has 125 places, 180 transitions, 2239 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:49:39,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 222 transitions, 2843 flow [2024-06-27 20:49:39,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 222 transitions, 2737 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:39,566 INFO L231 Difference]: Finished difference. Result has 129 places, 182 transitions, 2278 flow [2024-06-27 20:49:39,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2278, PETRI_PLACES=129, PETRI_TRANSITIONS=182} [2024-06-27 20:49:39,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 20:49:39,566 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 182 transitions, 2278 flow [2024-06-27 20:49:39,566 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 20:49:39,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:39,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:39,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:49:39,567 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 20:49:39,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:39,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1671192963, now seen corresponding path program 3 times [2024-06-27 20:49:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:39,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858845510] [2024-06-27 20:49:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:39,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:42,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:42,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858845510] [2024-06-27 20:49:42,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858845510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:42,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:42,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:42,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201541710] [2024-06-27 20:49:42,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:42,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:42,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:42,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:42,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:42,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:42,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 182 transitions, 2278 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 20:49:42,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:42,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:42,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:43,883 INFO L124 PetriNetUnfolderBase]: 2294/3514 cut-off events. [2024-06-27 20:49:43,883 INFO L125 PetriNetUnfolderBase]: For 54417/54419 co-relation queries the response was YES. [2024-06-27 20:49:43,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21648 conditions, 3514 events. 2294/3514 cut-off events. For 54417/54419 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17953 event pairs, 659 based on Foata normal form. 8/3521 useless extension candidates. Maximal degree in co-relation 21586. Up to 3249 conditions per place. [2024-06-27 20:49:43,907 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 33 changer transitions 0/220 dead transitions. [2024-06-27 20:49:43,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 220 transitions, 2851 flow [2024-06-27 20:49:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:49:43,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:49:43,909 INFO L175 Difference]: Start difference. First operand has 129 places, 182 transitions, 2278 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:49:43,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 220 transitions, 2851 flow [2024-06-27 20:49:43,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 220 transitions, 2746 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:43,977 INFO L231 Difference]: Finished difference. Result has 131 places, 184 transitions, 2288 flow [2024-06-27 20:49:43,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2288, PETRI_PLACES=131, PETRI_TRANSITIONS=184} [2024-06-27 20:49:43,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-27 20:49:43,978 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 184 transitions, 2288 flow [2024-06-27 20:49:43,978 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 20:49:43,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:43,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:43,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:49:43,978 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 20:49:43,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:43,979 INFO L85 PathProgramCache]: Analyzing trace with hash -49496853, now seen corresponding path program 1 times [2024-06-27 20:49:43,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:43,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128584240] [2024-06-27 20:49:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:43,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:47,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:47,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128584240] [2024-06-27 20:49:47,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128584240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:47,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:47,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481722471] [2024-06-27 20:49:47,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:47,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:47,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:47,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:47,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:47,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:47,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 184 transitions, 2288 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 20:49:47,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:47,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:47,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:49,254 INFO L124 PetriNetUnfolderBase]: 2382/3603 cut-off events. [2024-06-27 20:49:49,254 INFO L125 PetriNetUnfolderBase]: For 62212/62214 co-relation queries the response was YES. [2024-06-27 20:49:49,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22310 conditions, 3603 events. 2382/3603 cut-off events. For 62212/62214 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18166 event pairs, 596 based on Foata normal form. 20/3622 useless extension candidates. Maximal degree in co-relation 22247. Up to 3118 conditions per place. [2024-06-27 20:49:49,277 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 54 changer transitions 0/241 dead transitions. [2024-06-27 20:49:49,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 241 transitions, 3035 flow [2024-06-27 20:49:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:49:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:49:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:49:49,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 20:49:49,279 INFO L175 Difference]: Start difference. First operand has 131 places, 184 transitions, 2288 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:49:49,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 241 transitions, 3035 flow [2024-06-27 20:49:49,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 241 transitions, 2952 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:49,346 INFO L231 Difference]: Finished difference. Result has 135 places, 187 transitions, 2381 flow [2024-06-27 20:49:49,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2381, PETRI_PLACES=135, PETRI_TRANSITIONS=187} [2024-06-27 20:49:49,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-27 20:49:49,347 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 187 transitions, 2381 flow [2024-06-27 20:49:49,347 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 20:49:49,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:49,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:49,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:49:49,348 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 20:49:49,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:49,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1746293681, now seen corresponding path program 4 times [2024-06-27 20:49:49,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:49,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245119511] [2024-06-27 20:49:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:49,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245119511] [2024-06-27 20:49:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245119511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:52,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:52,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:52,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981270248] [2024-06-27 20:49:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:52,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:52,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:52,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 187 transitions, 2381 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 20:49:52,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:52,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:52,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:53,890 INFO L124 PetriNetUnfolderBase]: 2369/3629 cut-off events. [2024-06-27 20:49:53,890 INFO L125 PetriNetUnfolderBase]: For 63934/63936 co-relation queries the response was YES. [2024-06-27 20:49:53,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22784 conditions, 3629 events. 2369/3629 cut-off events. For 63934/63936 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18745 event pairs, 516 based on Foata normal form. 8/3636 useless extension candidates. Maximal degree in co-relation 22720. Up to 3250 conditions per place. [2024-06-27 20:49:53,919 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 46 changer transitions 0/221 dead transitions. [2024-06-27 20:49:53,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 221 transitions, 2913 flow [2024-06-27 20:49:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:49:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:49:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:49:53,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 20:49:53,928 INFO L175 Difference]: Start difference. First operand has 135 places, 187 transitions, 2381 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:49:53,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 221 transitions, 2913 flow [2024-06-27 20:49:54,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 221 transitions, 2757 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 20:49:54,014 INFO L231 Difference]: Finished difference. Result has 134 places, 187 transitions, 2334 flow [2024-06-27 20:49:54,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2334, PETRI_PLACES=134, PETRI_TRANSITIONS=187} [2024-06-27 20:49:54,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-27 20:49:54,015 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 187 transitions, 2334 flow [2024-06-27 20:49:54,015 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 20:49:54,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:54,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:54,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:49:54,015 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 20:49:54,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash -896625223, now seen corresponding path program 2 times [2024-06-27 20:49:54,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:54,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579512490] [2024-06-27 20:49:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:54,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:57,352 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 20:49:57,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:57,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579512490] [2024-06-27 20:49:57,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579512490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:57,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:57,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:57,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431752478] [2024-06-27 20:49:57,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:57,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:57,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:57,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:57,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:57,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:49:57,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 187 transitions, 2334 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 20:49:57,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:57,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:49:57,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:58,699 INFO L124 PetriNetUnfolderBase]: 2389/3683 cut-off events. [2024-06-27 20:49:58,699 INFO L125 PetriNetUnfolderBase]: For 66176/66199 co-relation queries the response was YES. [2024-06-27 20:49:58,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22887 conditions, 3683 events. 2389/3683 cut-off events. For 66176/66199 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19094 event pairs, 645 based on Foata normal form. 27/3709 useless extension candidates. Maximal degree in co-relation 22822. Up to 3360 conditions per place. [2024-06-27 20:49:58,725 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 190 selfloop transitions, 24 changer transitions 0/218 dead transitions. [2024-06-27 20:49:58,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 218 transitions, 2866 flow [2024-06-27 20:49:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:49:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:49:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:49:58,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 20:49:58,727 INFO L175 Difference]: Start difference. First operand has 134 places, 187 transitions, 2334 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:49:58,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 218 transitions, 2866 flow [2024-06-27 20:49:58,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 218 transitions, 2763 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:58,803 INFO L231 Difference]: Finished difference. Result has 135 places, 189 transitions, 2318 flow [2024-06-27 20:49:58,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2318, PETRI_PLACES=135, PETRI_TRANSITIONS=189} [2024-06-27 20:49:58,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-27 20:49:58,804 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 189 transitions, 2318 flow [2024-06-27 20:49:58,804 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 20:49:58,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:58,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:58,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:49:58,804 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 20:49:58,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:58,805 INFO L85 PathProgramCache]: Analyzing trace with hash -896616853, now seen corresponding path program 3 times [2024-06-27 20:49:58,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:58,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332734680] [2024-06-27 20:49:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:58,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:01,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:01,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332734680] [2024-06-27 20:50:01,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332734680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:01,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:01,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:01,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146268447] [2024-06-27 20:50:01,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:01,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:01,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:01,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:01,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:01,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 189 transitions, 2318 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 20:50:01,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:01,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:01,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:03,085 INFO L124 PetriNetUnfolderBase]: 2409/3701 cut-off events. [2024-06-27 20:50:03,085 INFO L125 PetriNetUnfolderBase]: For 66813/66836 co-relation queries the response was YES. [2024-06-27 20:50:03,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23132 conditions, 3701 events. 2409/3701 cut-off events. For 66813/66836 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19081 event pairs, 603 based on Foata normal form. 27/3727 useless extension candidates. Maximal degree in co-relation 23066. Up to 3292 conditions per place. [2024-06-27 20:50:03,110 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 190 selfloop transitions, 31 changer transitions 0/225 dead transitions. [2024-06-27 20:50:03,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 225 transitions, 3000 flow [2024-06-27 20:50:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:50:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:50:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:50:03,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:50:03,112 INFO L175 Difference]: Start difference. First operand has 135 places, 189 transitions, 2318 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:50:03,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 225 transitions, 3000 flow [2024-06-27 20:50:03,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 225 transitions, 2931 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:50:03,188 INFO L231 Difference]: Finished difference. Result has 138 places, 194 transitions, 2408 flow [2024-06-27 20:50:03,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2408, PETRI_PLACES=138, PETRI_TRANSITIONS=194} [2024-06-27 20:50:03,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-27 20:50:03,189 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 194 transitions, 2408 flow [2024-06-27 20:50:03,189 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 20:50:03,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:03,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:03,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:50:03,190 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 20:50:03,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:03,190 INFO L85 PathProgramCache]: Analyzing trace with hash -903111973, now seen corresponding path program 4 times [2024-06-27 20:50:03,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:03,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940205520] [2024-06-27 20:50:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:03,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:06,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:06,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940205520] [2024-06-27 20:50:06,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940205520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:06,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:06,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:06,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573342303] [2024-06-27 20:50:06,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:06,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:06,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:06,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 194 transitions, 2408 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 20:50:06,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:06,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:06,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:07,761 INFO L124 PetriNetUnfolderBase]: 2469/3746 cut-off events. [2024-06-27 20:50:07,762 INFO L125 PetriNetUnfolderBase]: For 76537/76539 co-relation queries the response was YES. [2024-06-27 20:50:07,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23915 conditions, 3746 events. 2469/3746 cut-off events. For 76537/76539 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19006 event pairs, 596 based on Foata normal form. 20/3765 useless extension candidates. Maximal degree in co-relation 23847. Up to 3159 conditions per place. [2024-06-27 20:50:07,785 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 173 selfloop transitions, 59 changer transitions 0/236 dead transitions. [2024-06-27 20:50:07,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 236 transitions, 3066 flow [2024-06-27 20:50:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:50:07,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:50:07,786 INFO L175 Difference]: Start difference. First operand has 138 places, 194 transitions, 2408 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:50:07,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 236 transitions, 3066 flow [2024-06-27 20:50:07,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 236 transitions, 2991 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 20:50:07,863 INFO L231 Difference]: Finished difference. Result has 143 places, 196 transitions, 2517 flow [2024-06-27 20:50:07,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2517, PETRI_PLACES=143, PETRI_TRANSITIONS=196} [2024-06-27 20:50:07,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 20:50:07,864 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 196 transitions, 2517 flow [2024-06-27 20:50:07,864 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 20:50:07,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:07,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:07,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:50:07,865 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:07,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:07,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1839674887, now seen corresponding path program 1 times [2024-06-27 20:50:07,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:07,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263659195] [2024-06-27 20:50:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:07,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:09,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:09,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263659195] [2024-06-27 20:50:09,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263659195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:09,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:09,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:50:09,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650406489] [2024-06-27 20:50:09,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:09,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:50:09,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:09,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:50:09,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:50:09,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:09,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 196 transitions, 2517 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 20:50:09,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:09,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:09,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:10,901 INFO L124 PetriNetUnfolderBase]: 2446/3774 cut-off events. [2024-06-27 20:50:10,902 INFO L125 PetriNetUnfolderBase]: For 78359/78381 co-relation queries the response was YES. [2024-06-27 20:50:10,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24577 conditions, 3774 events. 2446/3774 cut-off events. For 78359/78381 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19603 event pairs, 626 based on Foata normal form. 28/3788 useless extension candidates. Maximal degree in co-relation 24507. Up to 3495 conditions per place. [2024-06-27 20:50:10,934 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 191 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2024-06-27 20:50:10,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 224 transitions, 3135 flow [2024-06-27 20:50:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:50:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:50:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 20:50:10,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-27 20:50:10,936 INFO L175 Difference]: Start difference. First operand has 143 places, 196 transitions, 2517 flow. Second operand 6 states and 109 transitions. [2024-06-27 20:50:10,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 224 transitions, 3135 flow [2024-06-27 20:50:11,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 224 transitions, 2999 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:11,086 INFO L231 Difference]: Finished difference. Result has 144 places, 204 transitions, 2552 flow [2024-06-27 20:50:11,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2381, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2552, PETRI_PLACES=144, PETRI_TRANSITIONS=204} [2024-06-27 20:50:11,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-27 20:50:11,087 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 204 transitions, 2552 flow [2024-06-27 20:50:11,087 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 20:50:11,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:11,087 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 20:50:11,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:50:11,087 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 20:50:11,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1323063108, now seen corresponding path program 1 times [2024-06-27 20:50:11,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:11,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813519639] [2024-06-27 20:50:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:11,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:14,286 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 20:50:14,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:14,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813519639] [2024-06-27 20:50:14,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813519639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:14,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:14,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:14,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208430257] [2024-06-27 20:50:14,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:14,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:14,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:14,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:14,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 204 transitions, 2552 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 20:50:14,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:14,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:14,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:16,366 INFO L124 PetriNetUnfolderBase]: 3587/5595 cut-off events. [2024-06-27 20:50:16,367 INFO L125 PetriNetUnfolderBase]: For 152190/152192 co-relation queries the response was YES. [2024-06-27 20:50:16,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35614 conditions, 5595 events. 3587/5595 cut-off events. For 152190/152192 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 31874 event pairs, 740 based on Foata normal form. 66/5660 useless extension candidates. Maximal degree in co-relation 35542. Up to 2330 conditions per place. [2024-06-27 20:50:16,410 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 187 selfloop transitions, 117 changer transitions 0/308 dead transitions. [2024-06-27 20:50:16,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 308 transitions, 3969 flow [2024-06-27 20:50:16,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-27 20:50:16,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-06-27 20:50:16,412 INFO L175 Difference]: Start difference. First operand has 144 places, 204 transitions, 2552 flow. Second operand 11 states and 230 transitions. [2024-06-27 20:50:16,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 308 transitions, 3969 flow [2024-06-27 20:50:16,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 308 transitions, 3908 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 20:50:16,564 INFO L231 Difference]: Finished difference. Result has 155 places, 213 transitions, 2969 flow [2024-06-27 20:50:16,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2491, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2969, PETRI_PLACES=155, PETRI_TRANSITIONS=213} [2024-06-27 20:50:16,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 20:50:16,565 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 213 transitions, 2969 flow [2024-06-27 20:50:16,565 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 20:50:16,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:16,565 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 20:50:16,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:50:16,565 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 20:50:16,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:16,566 INFO L85 PathProgramCache]: Analyzing trace with hash 988465312, now seen corresponding path program 2 times [2024-06-27 20:50:16,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:16,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380383974] [2024-06-27 20:50:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:16,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:20,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:20,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380383974] [2024-06-27 20:50:20,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380383974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:20,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:20,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:20,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422472563] [2024-06-27 20:50:20,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:20,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:20,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:20,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:20,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:20,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:20,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 213 transitions, 2969 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 20:50:20,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:20,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:20,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:22,423 INFO L124 PetriNetUnfolderBase]: 3899/6119 cut-off events. [2024-06-27 20:50:22,423 INFO L125 PetriNetUnfolderBase]: For 177897/177899 co-relation queries the response was YES. [2024-06-27 20:50:22,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39379 conditions, 6119 events. 3899/6119 cut-off events. For 177897/177899 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 35804 event pairs, 1287 based on Foata normal form. 76/6194 useless extension candidates. Maximal degree in co-relation 39303. Up to 4557 conditions per place. [2024-06-27 20:50:22,466 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 167 selfloop transitions, 116 changer transitions 0/287 dead transitions. [2024-06-27 20:50:22,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 287 transitions, 3942 flow [2024-06-27 20:50:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:22,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-27 20:50:22,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-27 20:50:22,468 INFO L175 Difference]: Start difference. First operand has 155 places, 213 transitions, 2969 flow. Second operand 12 states and 230 transitions. [2024-06-27 20:50:22,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 287 transitions, 3942 flow [2024-06-27 20:50:22,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 287 transitions, 3717 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 20:50:22,659 INFO L231 Difference]: Finished difference. Result has 162 places, 215 transitions, 3048 flow [2024-06-27 20:50:22,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3048, PETRI_PLACES=162, PETRI_TRANSITIONS=215} [2024-06-27 20:50:22,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-27 20:50:22,660 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 215 transitions, 3048 flow [2024-06-27 20:50:22,660 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 20:50:22,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:22,661 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 20:50:22,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:50:22,661 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 20:50:22,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:22,661 INFO L85 PathProgramCache]: Analyzing trace with hash 988317442, now seen corresponding path program 3 times [2024-06-27 20:50:22,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:22,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276562534] [2024-06-27 20:50:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:22,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:25,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:25,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276562534] [2024-06-27 20:50:25,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276562534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:25,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:25,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:25,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381589260] [2024-06-27 20:50:25,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:25,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:25,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:25,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:25,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:26,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:26,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 215 transitions, 3048 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 20:50:26,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:26,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:26,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:28,490 INFO L124 PetriNetUnfolderBase]: 4452/7018 cut-off events. [2024-06-27 20:50:28,490 INFO L125 PetriNetUnfolderBase]: For 205636/205638 co-relation queries the response was YES. [2024-06-27 20:50:28,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44550 conditions, 7018 events. 4452/7018 cut-off events. For 205636/205638 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 42662 event pairs, 1423 based on Foata normal form. 66/7083 useless extension candidates. Maximal degree in co-relation 44472. Up to 4472 conditions per place. [2024-06-27 20:50:28,548 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 182 selfloop transitions, 118 changer transitions 0/304 dead transitions. [2024-06-27 20:50:28,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 304 transitions, 4218 flow [2024-06-27 20:50:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-27 20:50:28,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781746031746032 [2024-06-27 20:50:28,550 INFO L175 Difference]: Start difference. First operand has 162 places, 215 transitions, 3048 flow. Second operand 12 states and 241 transitions. [2024-06-27 20:50:28,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 304 transitions, 4218 flow [2024-06-27 20:50:28,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 304 transitions, 3949 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-27 20:50:28,806 INFO L231 Difference]: Finished difference. Result has 165 places, 220 transitions, 3146 flow [2024-06-27 20:50:28,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3146, PETRI_PLACES=165, PETRI_TRANSITIONS=220} [2024-06-27 20:50:28,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-27 20:50:28,807 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 220 transitions, 3146 flow [2024-06-27 20:50:28,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:28,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:28,807 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 20:50:28,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:50:28,808 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 20:50:28,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:28,808 INFO L85 PathProgramCache]: Analyzing trace with hash 272886666, now seen corresponding path program 4 times [2024-06-27 20:50:28,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:28,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910223900] [2024-06-27 20:50:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:28,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:32,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:32,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910223900] [2024-06-27 20:50:32,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910223900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:32,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:32,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:32,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283571549] [2024-06-27 20:50:32,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:32,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:32,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:32,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:32,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 220 transitions, 3146 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 20:50:32,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:32,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:32,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:35,063 INFO L124 PetriNetUnfolderBase]: 4764/7518 cut-off events. [2024-06-27 20:50:35,063 INFO L125 PetriNetUnfolderBase]: For 228953/228955 co-relation queries the response was YES. [2024-06-27 20:50:35,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47138 conditions, 7518 events. 4764/7518 cut-off events. For 228953/228955 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 46597 event pairs, 1801 based on Foata normal form. 76/7593 useless extension candidates. Maximal degree in co-relation 47058. Up to 6292 conditions per place. [2024-06-27 20:50:35,125 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 212 selfloop transitions, 85 changer transitions 0/301 dead transitions. [2024-06-27 20:50:35,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 301 transitions, 4193 flow [2024-06-27 20:50:35,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:50:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:50:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 246 transitions. [2024-06-27 20:50:35,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-27 20:50:35,127 INFO L175 Difference]: Start difference. First operand has 165 places, 220 transitions, 3146 flow. Second operand 13 states and 246 transitions. [2024-06-27 20:50:35,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 301 transitions, 4193 flow [2024-06-27 20:50:35,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 301 transitions, 3982 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 20:50:35,410 INFO L231 Difference]: Finished difference. Result has 170 places, 222 transitions, 3184 flow [2024-06-27 20:50:35,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3184, PETRI_PLACES=170, PETRI_TRANSITIONS=222} [2024-06-27 20:50:35,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-27 20:50:35,410 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 222 transitions, 3184 flow [2024-06-27 20:50:35,411 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 20:50:35,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:35,411 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 20:50:35,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:50:35,411 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 20:50:35,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1539978096, now seen corresponding path program 5 times [2024-06-27 20:50:35,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:35,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026557728] [2024-06-27 20:50:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:35,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:38,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:38,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026557728] [2024-06-27 20:50:38,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026557728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:38,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:38,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:38,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543434968] [2024-06-27 20:50:38,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:38,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:38,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:38,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 222 transitions, 3184 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 20:50:38,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:38,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:38,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:41,349 INFO L124 PetriNetUnfolderBase]: 5076/8048 cut-off events. [2024-06-27 20:50:41,349 INFO L125 PetriNetUnfolderBase]: For 243277/243279 co-relation queries the response was YES. [2024-06-27 20:50:41,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49788 conditions, 8048 events. 5076/8048 cut-off events. For 243277/243279 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 50928 event pairs, 1951 based on Foata normal form. 76/8123 useless extension candidates. Maximal degree in co-relation 49706. Up to 6816 conditions per place. [2024-06-27 20:50:41,414 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 208 selfloop transitions, 81 changer transitions 0/293 dead transitions. [2024-06-27 20:50:41,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 293 transitions, 4201 flow [2024-06-27 20:50:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:41,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:41,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:50:41,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-27 20:50:41,416 INFO L175 Difference]: Start difference. First operand has 170 places, 222 transitions, 3184 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:50:41,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 293 transitions, 4201 flow [2024-06-27 20:50:41,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 293 transitions, 3991 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-27 20:50:41,685 INFO L231 Difference]: Finished difference. Result has 170 places, 224 transitions, 3217 flow [2024-06-27 20:50:41,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3217, PETRI_PLACES=170, PETRI_TRANSITIONS=224} [2024-06-27 20:50:41,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-27 20:50:41,686 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 224 transitions, 3217 flow [2024-06-27 20:50:41,686 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 20:50:41,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:41,687 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 20:50:41,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:50:41,687 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 20:50:41,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:41,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1540125966, now seen corresponding path program 6 times [2024-06-27 20:50:41,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:41,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56457117] [2024-06-27 20:50:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:41,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:44,834 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 20:50:44,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:44,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56457117] [2024-06-27 20:50:44,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56457117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:44,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:44,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:44,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541889860] [2024-06-27 20:50:44,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:44,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:44,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:44,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:44,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:44,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:44,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 224 transitions, 3217 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 20:50:44,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:44,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:44,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:47,769 INFO L124 PetriNetUnfolderBase]: 5637/8953 cut-off events. [2024-06-27 20:50:47,769 INFO L125 PetriNetUnfolderBase]: For 280870/280872 co-relation queries the response was YES. [2024-06-27 20:50:47,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55149 conditions, 8953 events. 5637/8953 cut-off events. For 280870/280872 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 58113 event pairs, 1981 based on Foata normal form. 66/9018 useless extension candidates. Maximal degree in co-relation 55066. Up to 6158 conditions per place. [2024-06-27 20:50:47,850 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 221 selfloop transitions, 81 changer transitions 0/306 dead transitions. [2024-06-27 20:50:47,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 306 transitions, 4439 flow [2024-06-27 20:50:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 20:50:47,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-27 20:50:47,851 INFO L175 Difference]: Start difference. First operand has 170 places, 224 transitions, 3217 flow. Second operand 11 states and 219 transitions. [2024-06-27 20:50:47,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 306 transitions, 4439 flow [2024-06-27 20:50:48,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 306 transitions, 4235 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 20:50:48,219 INFO L231 Difference]: Finished difference. Result has 173 places, 229 transitions, 3345 flow [2024-06-27 20:50:48,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3345, PETRI_PLACES=173, PETRI_TRANSITIONS=229} [2024-06-27 20:50:48,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-27 20:50:48,220 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 229 transitions, 3345 flow [2024-06-27 20:50:48,220 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 20:50:48,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:48,220 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 20:50:48,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:50:48,220 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 20:50:48,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1534400514, now seen corresponding path program 1 times [2024-06-27 20:50:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:48,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520283690] [2024-06-27 20:50:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:48,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:52,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:52,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520283690] [2024-06-27 20:50:52,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520283690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:52,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:52,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:50:52,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429243011] [2024-06-27 20:50:52,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:52,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:50:52,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:52,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:50:52,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:50:52,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:52,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 229 transitions, 3345 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 20:50:52,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:52,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:52,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:55,353 INFO L124 PetriNetUnfolderBase]: 5849/9361 cut-off events. [2024-06-27 20:50:55,354 INFO L125 PetriNetUnfolderBase]: For 292649/292651 co-relation queries the response was YES. [2024-06-27 20:50:55,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57089 conditions, 9361 events. 5849/9361 cut-off events. For 292649/292651 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 61900 event pairs, 2222 based on Foata normal form. 56/9416 useless extension candidates. Maximal degree in co-relation 57004. Up to 7031 conditions per place. [2024-06-27 20:50:55,421 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 219 selfloop transitions, 93 changer transitions 0/316 dead transitions. [2024-06-27 20:50:55,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 316 transitions, 4485 flow [2024-06-27 20:50:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:50:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:50:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 250 transitions. [2024-06-27 20:50:55,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2024-06-27 20:50:55,423 INFO L175 Difference]: Start difference. First operand has 173 places, 229 transitions, 3345 flow. Second operand 13 states and 250 transitions. [2024-06-27 20:50:55,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 316 transitions, 4485 flow [2024-06-27 20:50:55,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 316 transitions, 4316 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 20:50:55,874 INFO L231 Difference]: Finished difference. Result has 179 places, 231 transitions, 3442 flow [2024-06-27 20:50:55,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3442, PETRI_PLACES=179, PETRI_TRANSITIONS=231} [2024-06-27 20:50:55,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-27 20:50:55,874 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 231 transitions, 3442 flow [2024-06-27 20:50:55,875 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 20:50:55,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:55,875 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 20:50:55,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:50:55,875 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:55,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:55,875 INFO L85 PathProgramCache]: Analyzing trace with hash 543087694, now seen corresponding path program 7 times [2024-06-27 20:50:55,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:55,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413460341] [2024-06-27 20:50:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:55,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:58,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413460341] [2024-06-27 20:50:58,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413460341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:58,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:58,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:58,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018518901] [2024-06-27 20:50:58,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:58,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:58,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:58,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:50:58,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 231 transitions, 3442 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 20:50:58,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:58,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:50:58,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:01,734 INFO L124 PetriNetUnfolderBase]: 5881/9455 cut-off events. [2024-06-27 20:51:01,735 INFO L125 PetriNetUnfolderBase]: For 286299/286322 co-relation queries the response was YES. [2024-06-27 20:51:01,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57653 conditions, 9455 events. 5881/9455 cut-off events. For 286299/286322 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 63059 event pairs, 2576 based on Foata normal form. 43/9497 useless extension candidates. Maximal degree in co-relation 57566. Up to 8781 conditions per place. [2024-06-27 20:51:01,814 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 236 selfloop transitions, 46 changer transitions 0/286 dead transitions. [2024-06-27 20:51:01,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 286 transitions, 4188 flow [2024-06-27 20:51:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:51:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:51:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 20:51:01,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:51:01,819 INFO L175 Difference]: Start difference. First operand has 179 places, 231 transitions, 3442 flow. Second operand 10 states and 175 transitions. [2024-06-27 20:51:01,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 286 transitions, 4188 flow [2024-06-27 20:51:02,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 286 transitions, 3942 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-06-27 20:51:02,263 INFO L231 Difference]: Finished difference. Result has 178 places, 232 transitions, 3325 flow [2024-06-27 20:51:02,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3325, PETRI_PLACES=178, PETRI_TRANSITIONS=232} [2024-06-27 20:51:02,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-27 20:51:02,264 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 232 transitions, 3325 flow [2024-06-27 20:51:02,264 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 20:51:02,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:02,264 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 20:51:02,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:51:02,264 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 20:51:02,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:02,265 INFO L85 PathProgramCache]: Analyzing trace with hash -571569430, now seen corresponding path program 8 times [2024-06-27 20:51:02,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:02,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575078515] [2024-06-27 20:51:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:02,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:05,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:05,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575078515] [2024-06-27 20:51:05,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575078515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:05,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:05,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:05,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181493485] [2024-06-27 20:51:05,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:05,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:05,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:05,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:05,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:05,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:05,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 232 transitions, 3325 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 20:51:05,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:05,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:05,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:08,179 INFO L124 PetriNetUnfolderBase]: 6381/10295 cut-off events. [2024-06-27 20:51:08,179 INFO L125 PetriNetUnfolderBase]: For 334694/334696 co-relation queries the response was YES. [2024-06-27 20:51:08,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60798 conditions, 10295 events. 6381/10295 cut-off events. For 334694/334696 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 70098 event pairs, 2593 based on Foata normal form. 76/10370 useless extension candidates. Maximal degree in co-relation 60710. Up to 8358 conditions per place. [2024-06-27 20:51:08,276 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 186 selfloop transitions, 102 changer transitions 0/292 dead transitions. [2024-06-27 20:51:08,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 292 transitions, 4200 flow [2024-06-27 20:51:08,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:51:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:51:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 20:51:08,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 20:51:08,279 INFO L175 Difference]: Start difference. First operand has 178 places, 232 transitions, 3325 flow. Second operand 10 states and 192 transitions. [2024-06-27 20:51:08,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 292 transitions, 4200 flow [2024-06-27 20:51:08,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 292 transitions, 4087 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:08,758 INFO L231 Difference]: Finished difference. Result has 180 places, 234 transitions, 3511 flow [2024-06-27 20:51:08,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3212, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3511, PETRI_PLACES=180, PETRI_TRANSITIONS=234} [2024-06-27 20:51:08,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 20:51:08,759 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 234 transitions, 3511 flow [2024-06-27 20:51:08,759 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 20:51:08,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:08,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:51:08,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:51:08,759 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 20:51:08,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2062724256, now seen corresponding path program 9 times [2024-06-27 20:51:08,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:08,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990518554] [2024-06-27 20:51:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:08,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:11,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:11,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990518554] [2024-06-27 20:51:11,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990518554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:11,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:11,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:11,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698432171] [2024-06-27 20:51:11,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:11,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:11,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:11,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:11,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:11,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:11,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 234 transitions, 3511 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 20:51:11,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:11,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:11,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:14,707 INFO L124 PetriNetUnfolderBase]: 6840/11084 cut-off events. [2024-06-27 20:51:14,707 INFO L125 PetriNetUnfolderBase]: For 358705/358707 co-relation queries the response was YES. [2024-06-27 20:51:14,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64415 conditions, 11084 events. 6840/11084 cut-off events. For 358705/358707 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 76974 event pairs, 2888 based on Foata normal form. 76/11159 useless extension candidates. Maximal degree in co-relation 64326. Up to 9139 conditions per place. [2024-06-27 20:51:14,826 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 197 selfloop transitions, 98 changer transitions 0/299 dead transitions. [2024-06-27 20:51:14,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 299 transitions, 4486 flow [2024-06-27 20:51:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:51:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:51:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 20:51:14,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-27 20:51:14,827 INFO L175 Difference]: Start difference. First operand has 180 places, 234 transitions, 3511 flow. Second operand 10 states and 199 transitions. [2024-06-27 20:51:14,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 299 transitions, 4486 flow [2024-06-27 20:51:15,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 299 transitions, 4240 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:15,445 INFO L231 Difference]: Finished difference. Result has 182 places, 236 transitions, 3560 flow [2024-06-27 20:51:15,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3560, PETRI_PLACES=182, PETRI_TRANSITIONS=236} [2024-06-27 20:51:15,446 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-27 20:51:15,446 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 236 transitions, 3560 flow [2024-06-27 20:51:15,446 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 20:51:15,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:15,446 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 20:51:15,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:51:15,447 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 20:51:15,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:15,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2062576386, now seen corresponding path program 10 times [2024-06-27 20:51:15,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:15,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732939173] [2024-06-27 20:51:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:15,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:18,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:18,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732939173] [2024-06-27 20:51:18,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732939173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:18,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:18,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:18,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268408185] [2024-06-27 20:51:18,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:18,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:18,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:18,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:18,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:18,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:18,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 236 transitions, 3560 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 20:51:18,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:18,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:18,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:21,692 INFO L124 PetriNetUnfolderBase]: 7185/11673 cut-off events. [2024-06-27 20:51:21,693 INFO L125 PetriNetUnfolderBase]: For 361595/361597 co-relation queries the response was YES. [2024-06-27 20:51:21,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65890 conditions, 11673 events. 7185/11673 cut-off events. For 361595/361597 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 82185 event pairs, 2257 based on Foata normal form. 66/11738 useless extension candidates. Maximal degree in co-relation 65800. Up to 6528 conditions per place. [2024-06-27 20:51:21,780 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 204 selfloop transitions, 107 changer transitions 0/315 dead transitions. [2024-06-27 20:51:21,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 315 transitions, 4776 flow [2024-06-27 20:51:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:51:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:51:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 20:51:21,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 20:51:21,782 INFO L175 Difference]: Start difference. First operand has 182 places, 236 transitions, 3560 flow. Second operand 10 states and 205 transitions. [2024-06-27 20:51:21,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 315 transitions, 4776 flow [2024-06-27 20:51:22,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 315 transitions, 4534 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:22,553 INFO L231 Difference]: Finished difference. Result has 185 places, 242 transitions, 3744 flow [2024-06-27 20:51:22,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3744, PETRI_PLACES=185, PETRI_TRANSITIONS=242} [2024-06-27 20:51:22,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 20:51:22,553 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 242 transitions, 3744 flow [2024-06-27 20:51:22,554 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 20:51:22,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:22,554 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 20:51:22,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:51:22,554 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 20:51:22,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:22,554 INFO L85 PathProgramCache]: Analyzing trace with hash 799803406, now seen corresponding path program 2 times [2024-06-27 20:51:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:22,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672038271] [2024-06-27 20:51:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:22,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:26,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:26,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672038271] [2024-06-27 20:51:26,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672038271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:26,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:26,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:51:26,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026902599] [2024-06-27 20:51:26,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:26,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:51:26,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:26,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:51:26,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:51:26,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:26,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 242 transitions, 3744 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 20:51:26,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:26,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:26,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:29,147 INFO L124 PetriNetUnfolderBase]: 7233/11767 cut-off events. [2024-06-27 20:51:29,148 INFO L125 PetriNetUnfolderBase]: For 346150/346173 co-relation queries the response was YES. [2024-06-27 20:51:29,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66846 conditions, 11767 events. 7233/11767 cut-off events. For 346150/346173 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 83524 event pairs, 3383 based on Foata normal form. 35/11801 useless extension candidates. Maximal degree in co-relation 66754. Up to 10975 conditions per place. [2024-06-27 20:51:29,257 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 252 selfloop transitions, 49 changer transitions 0/305 dead transitions. [2024-06-27 20:51:29,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 305 transitions, 4554 flow [2024-06-27 20:51:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-27 20:51:29,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-27 20:51:29,259 INFO L175 Difference]: Start difference. First operand has 185 places, 242 transitions, 3744 flow. Second operand 11 states and 192 transitions. [2024-06-27 20:51:29,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 305 transitions, 4554 flow [2024-06-27 20:51:30,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 305 transitions, 4183 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-27 20:51:30,161 INFO L231 Difference]: Finished difference. Result has 187 places, 243 transitions, 3507 flow [2024-06-27 20:51:30,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3507, PETRI_PLACES=187, PETRI_TRANSITIONS=243} [2024-06-27 20:51:30,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 20:51:30,162 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 243 transitions, 3507 flow [2024-06-27 20:51:30,162 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 20:51:30,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:30,162 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 20:51:30,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:51:30,163 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 20:51:30,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:30,163 INFO L85 PathProgramCache]: Analyzing trace with hash 809000176, now seen corresponding path program 3 times [2024-06-27 20:51:30,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:30,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393356572] [2024-06-27 20:51:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:30,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:33,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:33,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393356572] [2024-06-27 20:51:33,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393356572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:33,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:33,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:51:33,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738558144] [2024-06-27 20:51:33,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:33,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:51:33,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:51:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:51:33,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:33,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 243 transitions, 3507 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 20:51:33,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:33,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:33,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:36,852 INFO L124 PetriNetUnfolderBase]: 7281/11863 cut-off events. [2024-06-27 20:51:36,853 INFO L125 PetriNetUnfolderBase]: For 351069/351092 co-relation queries the response was YES. [2024-06-27 20:51:36,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65844 conditions, 11863 events. 7281/11863 cut-off events. For 351069/351092 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 84067 event pairs, 3361 based on Foata normal form. 35/11897 useless extension candidates. Maximal degree in co-relation 65752. Up to 10103 conditions per place. [2024-06-27 20:51:36,941 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 60 changer transitions 0/301 dead transitions. [2024-06-27 20:51:36,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 301 transitions, 4373 flow [2024-06-27 20:51:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:51:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:51:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 20:51:36,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 20:51:36,943 INFO L175 Difference]: Start difference. First operand has 187 places, 243 transitions, 3507 flow. Second operand 10 states and 177 transitions. [2024-06-27 20:51:36,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 301 transitions, 4373 flow [2024-06-27 20:51:37,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 301 transitions, 4249 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 20:51:37,480 INFO L231 Difference]: Finished difference. Result has 188 places, 244 transitions, 3539 flow [2024-06-27 20:51:37,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3539, PETRI_PLACES=188, PETRI_TRANSITIONS=244} [2024-06-27 20:51:37,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-27 20:51:37,481 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 244 transitions, 3539 flow [2024-06-27 20:51:37,481 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 20:51:37,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:37,482 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 20:51:37,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:51:37,482 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 20:51:37,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:37,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2068301838, now seen corresponding path program 4 times [2024-06-27 20:51:37,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:37,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890153154] [2024-06-27 20:51:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:37,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:41,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:41,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890153154] [2024-06-27 20:51:41,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890153154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:41,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:41,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:51:41,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416815462] [2024-06-27 20:51:41,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:41,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:51:41,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:41,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:51:41,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:51:41,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:51:41,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 244 transitions, 3539 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 20:51:41,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:41,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:51:41,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:44,428 INFO L124 PetriNetUnfolderBase]: 7629/12529 cut-off events. [2024-06-27 20:51:44,429 INFO L125 PetriNetUnfolderBase]: For 393556/393558 co-relation queries the response was YES. [2024-06-27 20:51:44,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68171 conditions, 12529 events. 7629/12529 cut-off events. For 393556/393558 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 90992 event pairs, 2944 based on Foata normal form. 56/12584 useless extension candidates. Maximal degree in co-relation 68078. Up to 8442 conditions per place. [2024-06-27 20:51:44,543 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 191 selfloop transitions, 114 changer transitions 0/309 dead transitions. [2024-06-27 20:51:44,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 309 transitions, 4413 flow [2024-06-27 20:51:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:51:44,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:51:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 20:51:44,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:51:44,544 INFO L175 Difference]: Start difference. First operand has 188 places, 244 transitions, 3539 flow. Second operand 10 states and 195 transitions. [2024-06-27 20:51:44,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 309 transitions, 4413 flow [2024-06-27 20:51:45,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 309 transitions, 4282 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 20:51:45,398 INFO L231 Difference]: Finished difference. Result has 191 places, 245 transitions, 3682 flow [2024-06-27 20:51:45,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3682, PETRI_PLACES=191, PETRI_TRANSITIONS=245} [2024-06-27 20:51:45,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-27 20:51:45,400 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 245 transitions, 3682 flow [2024-06-27 20:51:45,400 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 20:51:45,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:45,400 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 20:51:45,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:51:45,400 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:45,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:45,401 INFO L85 PathProgramCache]: Analyzing trace with hash 113157308, now seen corresponding path program 1 times [2024-06-27 20:51:45,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:45,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958711257] [2024-06-27 20:51:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:45,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:48,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:48,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958711257] [2024-06-27 20:51:48,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958711257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:48,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:48,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:51:48,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090400637] [2024-06-27 20:51:48,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:48,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:51:48,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:48,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:51:48,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:51:48,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:48,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 245 transitions, 3682 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 20:51:48,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:48,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:48,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:50,941 INFO L124 PetriNetUnfolderBase]: 7706/12626 cut-off events. [2024-06-27 20:51:50,941 INFO L125 PetriNetUnfolderBase]: For 392774/392817 co-relation queries the response was YES. [2024-06-27 20:51:51,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70809 conditions, 12626 events. 7706/12626 cut-off events. For 392774/392817 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 91582 event pairs, 3704 based on Foata normal form. 39/12630 useless extension candidates. Maximal degree in co-relation 70714. Up to 12123 conditions per place. [2024-06-27 20:51:51,051 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 46 changer transitions 9/300 dead transitions. [2024-06-27 20:51:51,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 300 transitions, 4856 flow [2024-06-27 20:51:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:51:51,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:51:51,052 INFO L175 Difference]: Start difference. First operand has 191 places, 245 transitions, 3682 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:51:51,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 300 transitions, 4856 flow [2024-06-27 20:51:51,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 300 transitions, 4535 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:51,904 INFO L231 Difference]: Finished difference. Result has 192 places, 267 transitions, 3924 flow [2024-06-27 20:51:51,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3924, PETRI_PLACES=192, PETRI_TRANSITIONS=267} [2024-06-27 20:51:51,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-27 20:51:51,905 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 267 transitions, 3924 flow [2024-06-27 20:51:51,905 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 20:51:51,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:51,905 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 20:51:51,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:51:51,905 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 20:51:51,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1023973834, now seen corresponding path program 2 times [2024-06-27 20:51:51,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:51,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258657075] [2024-06-27 20:51:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:51,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:54,665 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 20:51:54,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258657075] [2024-06-27 20:51:54,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258657075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:54,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:54,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:51:54,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465633143] [2024-06-27 20:51:54,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:54,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:51:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:54,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:51:54,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:51:54,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:54,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 267 transitions, 3924 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 20:51:54,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:54,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:54,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:57,262 INFO L124 PetriNetUnfolderBase]: 7238/11756 cut-off events. [2024-06-27 20:51:57,262 INFO L125 PetriNetUnfolderBase]: For 385610/385653 co-relation queries the response was YES. [2024-06-27 20:51:57,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65560 conditions, 11756 events. 7238/11756 cut-off events. For 385610/385653 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 83444 event pairs, 3381 based on Foata normal form. 39/11763 useless extension candidates. Maximal degree in co-relation 65464. Up to 11211 conditions per place. [2024-06-27 20:51:57,379 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 201 selfloop transitions, 65 changer transitions 15/295 dead transitions. [2024-06-27 20:51:57,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 295 transitions, 4552 flow [2024-06-27 20:51:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:51:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:51:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:51:57,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 20:51:57,381 INFO L175 Difference]: Start difference. First operand has 192 places, 267 transitions, 3924 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:51:57,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 295 transitions, 4552 flow [2024-06-27 20:51:58,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 295 transitions, 4441 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 20:51:58,207 INFO L231 Difference]: Finished difference. Result has 195 places, 253 transitions, 3723 flow [2024-06-27 20:51:58,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3723, PETRI_PLACES=195, PETRI_TRANSITIONS=253} [2024-06-27 20:51:58,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 20:51:58,208 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 253 transitions, 3723 flow [2024-06-27 20:51:58,208 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 20:51:58,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:58,208 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 20:51:58,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:51:58,208 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 20:51:58,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1598606100, now seen corresponding path program 3 times [2024-06-27 20:51:58,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:58,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049782853] [2024-06-27 20:51:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:58,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:01,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:01,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049782853] [2024-06-27 20:52:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049782853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:01,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:01,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:52:01,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962410270] [2024-06-27 20:52:01,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:01,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:52:01,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:52:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:52:01,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:01,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 253 transitions, 3723 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 20:52:01,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:01,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:01,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:03,717 INFO L124 PetriNetUnfolderBase]: 6324/10232 cut-off events. [2024-06-27 20:52:03,717 INFO L125 PetriNetUnfolderBase]: For 390879/390939 co-relation queries the response was YES. [2024-06-27 20:52:03,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60657 conditions, 10232 events. 6324/10232 cut-off events. For 390879/390939 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 70200 event pairs, 2553 based on Foata normal form. 49/10249 useless extension candidates. Maximal degree in co-relation 60561. Up to 9551 conditions per place. [2024-06-27 20:52:03,806 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 84 changer transitions 0/288 dead transitions. [2024-06-27 20:52:03,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 288 transitions, 4685 flow [2024-06-27 20:52:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:52:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:52:03,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:52:03,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 20:52:03,808 INFO L175 Difference]: Start difference. First operand has 195 places, 253 transitions, 3723 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:52:03,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 288 transitions, 4685 flow [2024-06-27 20:52:04,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 288 transitions, 4391 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 20:52:04,420 INFO L231 Difference]: Finished difference. Result has 193 places, 264 transitions, 3858 flow [2024-06-27 20:52:04,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3439, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3858, PETRI_PLACES=193, PETRI_TRANSITIONS=264} [2024-06-27 20:52:04,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-27 20:52:04,421 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 264 transitions, 3858 flow [2024-06-27 20:52:04,421 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 20:52:04,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:04,421 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 20:52:04,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:52:04,422 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 20:52:04,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash 380554878, now seen corresponding path program 1 times [2024-06-27 20:52:04,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:04,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799690331] [2024-06-27 20:52:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:04,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:06,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:06,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799690331] [2024-06-27 20:52:06,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799690331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:06,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:06,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:52:06,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227837721] [2024-06-27 20:52:06,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:06,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:52:06,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:06,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:52:06,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:52:06,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:06,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 264 transitions, 3858 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 20:52:06,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:06,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:06,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:09,247 INFO L124 PetriNetUnfolderBase]: 6418/10344 cut-off events. [2024-06-27 20:52:09,248 INFO L125 PetriNetUnfolderBase]: For 370834/370836 co-relation queries the response was YES. [2024-06-27 20:52:09,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61674 conditions, 10344 events. 6418/10344 cut-off events. For 370834/370836 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 70636 event pairs, 2837 based on Foata normal form. 4/10347 useless extension candidates. Maximal degree in co-relation 61578. Up to 10037 conditions per place. [2024-06-27 20:52:09,335 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 264 selfloop transitions, 25 changer transitions 0/293 dead transitions. [2024-06-27 20:52:09,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 293 transitions, 4774 flow [2024-06-27 20:52:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:52:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:52:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 20:52:09,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-27 20:52:09,337 INFO L175 Difference]: Start difference. First operand has 193 places, 264 transitions, 3858 flow. Second operand 6 states and 107 transitions. [2024-06-27 20:52:09,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 293 transitions, 4774 flow [2024-06-27 20:52:09,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 293 transitions, 4666 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-27 20:52:09,891 INFO L231 Difference]: Finished difference. Result has 198 places, 270 transitions, 3946 flow [2024-06-27 20:52:09,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3946, PETRI_PLACES=198, PETRI_TRANSITIONS=270} [2024-06-27 20:52:09,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-27 20:52:09,893 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 270 transitions, 3946 flow [2024-06-27 20:52:09,893 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 20:52:09,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:09,893 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 20:52:09,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:52:09,894 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 20:52:09,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:09,894 INFO L85 PathProgramCache]: Analyzing trace with hash 417606078, now seen corresponding path program 2 times [2024-06-27 20:52:09,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:09,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819231702] [2024-06-27 20:52:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:09,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:12,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:12,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819231702] [2024-06-27 20:52:12,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819231702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:12,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:12,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:52:12,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771012301] [2024-06-27 20:52:12,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:12,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:52:12,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:12,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:52:12,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:52:12,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:12,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 270 transitions, 3946 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 20:52:12,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:12,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:12,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:14,244 INFO L124 PetriNetUnfolderBase]: 6384/10308 cut-off events. [2024-06-27 20:52:14,245 INFO L125 PetriNetUnfolderBase]: For 382189/382191 co-relation queries the response was YES. [2024-06-27 20:52:14,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61528 conditions, 10308 events. 6384/10308 cut-off events. For 382189/382191 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 70407 event pairs, 2834 based on Foata normal form. 8/10315 useless extension candidates. Maximal degree in co-relation 61429. Up to 10038 conditions per place. [2024-06-27 20:52:14,358 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 21 changer transitions 0/290 dead transitions. [2024-06-27 20:52:14,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 290 transitions, 4574 flow [2024-06-27 20:52:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:52:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:52:14,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 20:52:14,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:52:14,379 INFO L175 Difference]: Start difference. First operand has 198 places, 270 transitions, 3946 flow. Second operand 6 states and 104 transitions. [2024-06-27 20:52:14,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 290 transitions, 4574 flow [2024-06-27 20:52:15,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 290 transitions, 4472 flow, removed 50 selfloop flow, removed 1 redundant places. [2024-06-27 20:52:15,128 INFO L231 Difference]: Finished difference. Result has 203 places, 270 transitions, 3898 flow [2024-06-27 20:52:15,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3898, PETRI_PLACES=203, PETRI_TRANSITIONS=270} [2024-06-27 20:52:15,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-27 20:52:15,128 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 270 transitions, 3898 flow [2024-06-27 20:52:15,129 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 20:52:15,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:15,129 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 20:52:15,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:52:15,129 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 20:52:15,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1599024600, now seen corresponding path program 1 times [2024-06-27 20:52:15,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:15,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132836548] [2024-06-27 20:52:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:15,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:17,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:17,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132836548] [2024-06-27 20:52:17,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132836548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:17,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:17,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:52:17,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695561763] [2024-06-27 20:52:17,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:17,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:52:17,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:17,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:52:17,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:52:17,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:17,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 270 transitions, 3898 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 20:52:17,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:17,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:17,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:20,393 INFO L124 PetriNetUnfolderBase]: 6317/10229 cut-off events. [2024-06-27 20:52:20,394 INFO L125 PetriNetUnfolderBase]: For 407575/407618 co-relation queries the response was YES. [2024-06-27 20:52:20,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61439 conditions, 10229 events. 6317/10229 cut-off events. For 407575/407618 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 70038 event pairs, 2812 based on Foata normal form. 40/10239 useless extension candidates. Maximal degree in co-relation 61337. Up to 9861 conditions per place. [2024-06-27 20:52:20,513 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 23 changer transitions 0/298 dead transitions. [2024-06-27 20:52:20,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 298 transitions, 4588 flow [2024-06-27 20:52:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:52:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:52:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:52:20,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 20:52:20,514 INFO L175 Difference]: Start difference. First operand has 203 places, 270 transitions, 3898 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:52:20,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 298 transitions, 4588 flow [2024-06-27 20:52:21,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 298 transitions, 4536 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:52:21,192 INFO L231 Difference]: Finished difference. Result has 204 places, 272 transitions, 3944 flow [2024-06-27 20:52:21,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3846, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3944, PETRI_PLACES=204, PETRI_TRANSITIONS=272} [2024-06-27 20:52:21,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 20:52:21,192 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 272 transitions, 3944 flow [2024-06-27 20:52:21,193 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 20:52:21,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:21,193 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 20:52:21,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:52:21,193 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 20:52:21,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:21,193 INFO L85 PathProgramCache]: Analyzing trace with hash -796354709, now seen corresponding path program 1 times [2024-06-27 20:52:21,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:21,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905504939] [2024-06-27 20:52:21,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:21,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:24,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:24,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905504939] [2024-06-27 20:52:24,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905504939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:24,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:24,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:52:24,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802510274] [2024-06-27 20:52:24,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:24,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:52:24,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:24,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:52:24,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:52:24,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:24,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 272 transitions, 3944 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 20:52:24,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:24,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:24,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:27,129 INFO L124 PetriNetUnfolderBase]: 6433/10384 cut-off events. [2024-06-27 20:52:27,129 INFO L125 PetriNetUnfolderBase]: For 408083/408083 co-relation queries the response was YES. [2024-06-27 20:52:27,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62593 conditions, 10384 events. 6433/10384 cut-off events. For 408083/408083 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71158 event pairs, 2906 based on Foata normal form. 2/10385 useless extension candidates. Maximal degree in co-relation 62490. Up to 10147 conditions per place. [2024-06-27 20:52:27,231 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 283 selfloop transitions, 24 changer transitions 0/311 dead transitions. [2024-06-27 20:52:27,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 311 transitions, 4742 flow [2024-06-27 20:52:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:52:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:52:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:52:27,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:52:27,233 INFO L175 Difference]: Start difference. First operand has 204 places, 272 transitions, 3944 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:52:27,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 311 transitions, 4742 flow [2024-06-27 20:52:27,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 311 transitions, 4668 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:52:27,850 INFO L231 Difference]: Finished difference. Result has 208 places, 279 transitions, 4037 flow [2024-06-27 20:52:27,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3870, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4037, PETRI_PLACES=208, PETRI_TRANSITIONS=279} [2024-06-27 20:52:27,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 20:52:27,850 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 279 transitions, 4037 flow [2024-06-27 20:52:27,850 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 20:52:27,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:27,851 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 20:52:27,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:52:27,851 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 20:52:27,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:27,851 INFO L85 PathProgramCache]: Analyzing trace with hash -634556565, now seen corresponding path program 2 times [2024-06-27 20:52:27,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:27,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556016073] [2024-06-27 20:52:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:27,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:31,126 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 20:52:31,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:31,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556016073] [2024-06-27 20:52:31,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556016073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:31,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:31,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:52:31,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093644394] [2024-06-27 20:52:31,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:31,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:52:31,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:31,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:52:31,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:52:31,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:31,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 279 transitions, 4037 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 20:52:31,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:31,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:31,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:33,687 INFO L124 PetriNetUnfolderBase]: 6464/10433 cut-off events. [2024-06-27 20:52:33,687 INFO L125 PetriNetUnfolderBase]: For 425451/425451 co-relation queries the response was YES. [2024-06-27 20:52:33,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63304 conditions, 10433 events. 6464/10433 cut-off events. For 425451/425451 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71462 event pairs, 2899 based on Foata normal form. 2/10434 useless extension candidates. Maximal degree in co-relation 63199. Up to 10166 conditions per place. [2024-06-27 20:52:33,786 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 279 selfloop transitions, 35 changer transitions 0/318 dead transitions. [2024-06-27 20:52:33,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 318 transitions, 5035 flow [2024-06-27 20:52:33,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:52:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:52:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:52:33,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:52:33,788 INFO L175 Difference]: Start difference. First operand has 208 places, 279 transitions, 4037 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:52:33,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 318 transitions, 5035 flow [2024-06-27 20:52:34,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 318 transitions, 4971 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 20:52:34,489 INFO L231 Difference]: Finished difference. Result has 213 places, 293 transitions, 4304 flow [2024-06-27 20:52:34,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3981, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4304, PETRI_PLACES=213, PETRI_TRANSITIONS=293} [2024-06-27 20:52:34,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-27 20:52:34,489 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 293 transitions, 4304 flow [2024-06-27 20:52:34,490 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 20:52:34,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:34,490 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 20:52:34,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:52:34,490 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 20:52:34,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:34,490 INFO L85 PathProgramCache]: Analyzing trace with hash -787100279, now seen corresponding path program 3 times [2024-06-27 20:52:34,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:34,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756001191] [2024-06-27 20:52:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:34,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:37,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:37,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756001191] [2024-06-27 20:52:37,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756001191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:37,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:37,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:52:37,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629091298] [2024-06-27 20:52:37,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:37,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:52:37,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:37,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:52:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:52:37,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:37,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 293 transitions, 4304 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 20:52:37,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:37,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:37,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:40,549 INFO L124 PetriNetUnfolderBase]: 6458/10425 cut-off events. [2024-06-27 20:52:40,549 INFO L125 PetriNetUnfolderBase]: For 440616/440616 co-relation queries the response was YES. [2024-06-27 20:52:40,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63696 conditions, 10425 events. 6458/10425 cut-off events. For 440616/440616 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71413 event pairs, 2900 based on Foata normal form. 2/10426 useless extension candidates. Maximal degree in co-relation 63588. Up to 10161 conditions per place. [2024-06-27 20:52:40,660 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 280 selfloop transitions, 36 changer transitions 0/320 dead transitions. [2024-06-27 20:52:40,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 320 transitions, 5004 flow [2024-06-27 20:52:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:52:40,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:52:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-27 20:52:40,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-27 20:52:40,662 INFO L175 Difference]: Start difference. First operand has 213 places, 293 transitions, 4304 flow. Second operand 10 states and 150 transitions. [2024-06-27 20:52:40,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 320 transitions, 5004 flow [2024-06-27 20:52:41,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 320 transitions, 4975 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 20:52:41,506 INFO L231 Difference]: Finished difference. Result has 221 places, 293 transitions, 4353 flow [2024-06-27 20:52:41,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4275, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4353, PETRI_PLACES=221, PETRI_TRANSITIONS=293} [2024-06-27 20:52:41,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-27 20:52:41,510 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 293 transitions, 4353 flow [2024-06-27 20:52:41,510 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 20:52:41,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:41,510 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 20:52:41,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:52:41,510 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 20:52:41,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:41,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1970304603, now seen corresponding path program 4 times [2024-06-27 20:52:41,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:41,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34762126] [2024-06-27 20:52:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:41,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:44,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:44,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34762126] [2024-06-27 20:52:44,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34762126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:44,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:44,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:52:44,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467944357] [2024-06-27 20:52:44,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:44,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:52:44,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:44,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:52:44,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:52:44,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:44,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 293 transitions, 4353 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 20:52:45,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:45,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:45,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:47,681 INFO L124 PetriNetUnfolderBase]: 6452/10415 cut-off events. [2024-06-27 20:52:47,681 INFO L125 PetriNetUnfolderBase]: For 455688/455688 co-relation queries the response was YES. [2024-06-27 20:52:47,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64038 conditions, 10415 events. 6452/10415 cut-off events. For 455688/455688 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71294 event pairs, 2855 based on Foata normal form. 2/10415 useless extension candidates. Maximal degree in co-relation 63928. Up to 10112 conditions per place. [2024-06-27 20:52:47,793 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 275 selfloop transitions, 44 changer transitions 0/323 dead transitions. [2024-06-27 20:52:47,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 323 transitions, 5293 flow [2024-06-27 20:52:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:52:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:52:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 20:52:47,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-27 20:52:47,795 INFO L175 Difference]: Start difference. First operand has 221 places, 293 transitions, 4353 flow. Second operand 7 states and 110 transitions. [2024-06-27 20:52:47,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 323 transitions, 5293 flow [2024-06-27 20:52:48,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 323 transitions, 5213 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:48,573 INFO L231 Difference]: Finished difference. Result has 223 places, 305 transitions, 4563 flow [2024-06-27 20:52:48,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4273, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4563, PETRI_PLACES=223, PETRI_TRANSITIONS=305} [2024-06-27 20:52:48,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 20:52:48,574 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 305 transitions, 4563 flow [2024-06-27 20:52:48,574 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 20:52:48,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:48,574 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 20:52:48,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:52:48,574 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 20:52:48,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:48,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1678416153, now seen corresponding path program 5 times [2024-06-27 20:52:48,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:48,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669346570] [2024-06-27 20:52:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:48,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:51,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:51,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669346570] [2024-06-27 20:52:51,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669346570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:51,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:51,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:52:51,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943140872] [2024-06-27 20:52:51,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:51,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:52:51,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:52:51,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:52:51,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:51,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 305 transitions, 4563 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 20:52:51,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:51,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:51,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:54,518 INFO L124 PetriNetUnfolderBase]: 6462/10431 cut-off events. [2024-06-27 20:52:54,519 INFO L125 PetriNetUnfolderBase]: For 474923/474923 co-relation queries the response was YES. [2024-06-27 20:52:54,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65859 conditions, 10431 events. 6462/10431 cut-off events. For 474923/474923 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71456 event pairs, 2899 based on Foata normal form. 2/10432 useless extension candidates. Maximal degree in co-relation 65746. Up to 10144 conditions per place. [2024-06-27 20:52:54,636 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 287 selfloop transitions, 42 changer transitions 0/333 dead transitions. [2024-06-27 20:52:54,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 333 transitions, 5459 flow [2024-06-27 20:52:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:52:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:52:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:52:54,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:52:54,638 INFO L175 Difference]: Start difference. First operand has 223 places, 305 transitions, 4563 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:52:54,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 333 transitions, 5459 flow [2024-06-27 20:52:55,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 333 transitions, 5379 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 20:52:55,417 INFO L231 Difference]: Finished difference. Result has 228 places, 309 transitions, 4681 flow [2024-06-27 20:52:55,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4483, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4681, PETRI_PLACES=228, PETRI_TRANSITIONS=309} [2024-06-27 20:52:55,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-27 20:52:55,418 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 309 transitions, 4681 flow [2024-06-27 20:52:55,418 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 20:52:55,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:55,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:55,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:52:55,418 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 20:52:55,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:55,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1983202773, now seen corresponding path program 6 times [2024-06-27 20:52:55,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:55,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919953905] [2024-06-27 20:52:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:55,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:58,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:58,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919953905] [2024-06-27 20:52:58,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919953905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:58,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:58,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:52:58,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007720559] [2024-06-27 20:52:58,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:58,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:52:58,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:52:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:52:58,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:52:58,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 309 transitions, 4681 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 20:52:58,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:58,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:52:58,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:01,193 INFO L124 PetriNetUnfolderBase]: 6456/10423 cut-off events. [2024-06-27 20:53:01,194 INFO L125 PetriNetUnfolderBase]: For 490409/490409 co-relation queries the response was YES. [2024-06-27 20:53:01,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66131 conditions, 10423 events. 6456/10423 cut-off events. For 490409/490409 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71367 event pairs, 2896 based on Foata normal form. 2/10424 useless extension candidates. Maximal degree in co-relation 66016. Up to 10139 conditions per place. [2024-06-27 20:53:01,323 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 294 selfloop transitions, 45 changer transitions 0/343 dead transitions. [2024-06-27 20:53:01,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 343 transitions, 5445 flow [2024-06-27 20:53:01,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:53:01,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-27 20:53:01,324 INFO L175 Difference]: Start difference. First operand has 228 places, 309 transitions, 4681 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:53:01,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 343 transitions, 5445 flow [2024-06-27 20:53:02,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 343 transitions, 5363 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:02,205 INFO L231 Difference]: Finished difference. Result has 232 places, 309 transitions, 4703 flow [2024-06-27 20:53:02,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4599, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4703, PETRI_PLACES=232, PETRI_TRANSITIONS=309} [2024-06-27 20:53:02,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-27 20:53:02,206 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 309 transitions, 4703 flow [2024-06-27 20:53:02,206 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 20:53:02,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:02,206 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 20:53:02,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:53:02,206 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 20:53:02,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash 411016113, now seen corresponding path program 1 times [2024-06-27 20:53:02,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:02,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773154746] [2024-06-27 20:53:02,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:02,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:04,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:04,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773154746] [2024-06-27 20:53:04,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773154746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:04,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:04,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:04,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180506909] [2024-06-27 20:53:04,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:04,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:04,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:04,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:04,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:04,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 309 transitions, 4703 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 20:53:04,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:04,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:04,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:07,354 INFO L124 PetriNetUnfolderBase]: 6444/10408 cut-off events. [2024-06-27 20:53:07,355 INFO L125 PetriNetUnfolderBase]: For 487848/487850 co-relation queries the response was YES. [2024-06-27 20:53:07,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65874 conditions, 10408 events. 6444/10408 cut-off events. For 487848/487850 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71057 event pairs, 2832 based on Foata normal form. 6/10413 useless extension candidates. Maximal degree in co-relation 65759. Up to 10106 conditions per place. [2024-06-27 20:53:07,467 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 301 selfloop transitions, 27 changer transitions 0/332 dead transitions. [2024-06-27 20:53:07,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 332 transitions, 5411 flow [2024-06-27 20:53:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:53:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:53:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:53:07,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 20:53:07,469 INFO L175 Difference]: Start difference. First operand has 232 places, 309 transitions, 4703 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:53:07,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 332 transitions, 5411 flow [2024-06-27 20:53:08,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 332 transitions, 5301 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 20:53:08,106 INFO L231 Difference]: Finished difference. Result has 231 places, 309 transitions, 4653 flow [2024-06-27 20:53:08,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4653, PETRI_PLACES=231, PETRI_TRANSITIONS=309} [2024-06-27 20:53:08,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-27 20:53:08,106 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 309 transitions, 4653 flow [2024-06-27 20:53:08,107 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 20:53:08,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:08,107 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 20:53:08,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:53:08,107 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 20:53:08,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:08,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1192557889, now seen corresponding path program 1 times [2024-06-27 20:53:08,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:08,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681669032] [2024-06-27 20:53:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:08,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:11,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:11,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681669032] [2024-06-27 20:53:11,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681669032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:11,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:11,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:11,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890170864] [2024-06-27 20:53:11,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:11,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:11,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:11,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:11,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:11,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:11,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 309 transitions, 4653 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 20:53:11,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:11,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:11,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:14,103 INFO L124 PetriNetUnfolderBase]: 6534/10502 cut-off events. [2024-06-27 20:53:14,103 INFO L125 PetriNetUnfolderBase]: For 497558/497560 co-relation queries the response was YES. [2024-06-27 20:53:14,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67201 conditions, 10502 events. 6534/10502 cut-off events. For 497558/497560 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71672 event pairs, 2883 based on Foata normal form. 4/10505 useless extension candidates. Maximal degree in co-relation 67086. Up to 10016 conditions per place. [2024-06-27 20:53:14,208 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 79 changer transitions 0/363 dead transitions. [2024-06-27 20:53:14,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 363 transitions, 5901 flow [2024-06-27 20:53:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:53:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:53:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 20:53:14,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 20:53:14,210 INFO L175 Difference]: Start difference. First operand has 231 places, 309 transitions, 4653 flow. Second operand 10 states and 171 transitions. [2024-06-27 20:53:14,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 363 transitions, 5901 flow [2024-06-27 20:53:15,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 363 transitions, 5817 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:53:15,028 INFO L231 Difference]: Finished difference. Result has 235 places, 318 transitions, 4915 flow [2024-06-27 20:53:15,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4569, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4915, PETRI_PLACES=235, PETRI_TRANSITIONS=318} [2024-06-27 20:53:15,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-27 20:53:15,028 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 318 transitions, 4915 flow [2024-06-27 20:53:15,029 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 20:53:15,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:15,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:15,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:53:15,029 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 20:53:15,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1906890709, now seen corresponding path program 1 times [2024-06-27 20:53:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:15,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431276665] [2024-06-27 20:53:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:15,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:19,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:19,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431276665] [2024-06-27 20:53:19,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431276665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:19,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:19,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:19,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836829408] [2024-06-27 20:53:19,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:19,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:19,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:19,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:19,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:19,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:19,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 318 transitions, 4915 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:19,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:19,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:19,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:22,036 INFO L124 PetriNetUnfolderBase]: 6502/10486 cut-off events. [2024-06-27 20:53:22,036 INFO L125 PetriNetUnfolderBase]: For 546943/546974 co-relation queries the response was YES. [2024-06-27 20:53:22,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69075 conditions, 10486 events. 6502/10486 cut-off events. For 546943/546974 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 71909 event pairs, 2888 based on Foata normal form. 28/10486 useless extension candidates. Maximal degree in co-relation 68960. Up to 10047 conditions per place. [2024-06-27 20:53:22,162 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 51 changer transitions 0/351 dead transitions. [2024-06-27 20:53:22,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 351 transitions, 5715 flow [2024-06-27 20:53:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:53:22,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:53:22,164 INFO L175 Difference]: Start difference. First operand has 235 places, 318 transitions, 4915 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:53:22,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 351 transitions, 5715 flow [2024-06-27 20:53:23,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 351 transitions, 5565 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:23,376 INFO L231 Difference]: Finished difference. Result has 239 places, 320 transitions, 4931 flow [2024-06-27 20:53:23,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4931, PETRI_PLACES=239, PETRI_TRANSITIONS=320} [2024-06-27 20:53:23,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 20:53:23,377 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 320 transitions, 4931 flow [2024-06-27 20:53:23,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:23,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:23,378 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 20:53:23,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:53:23,378 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 20:53:23,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:23,378 INFO L85 PathProgramCache]: Analyzing trace with hash -382743231, now seen corresponding path program 2 times [2024-06-27 20:53:23,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:23,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942870833] [2024-06-27 20:53:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:23,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:26,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:26,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942870833] [2024-06-27 20:53:26,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942870833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:26,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:26,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:26,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271093000] [2024-06-27 20:53:26,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:26,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:26,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:26,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:26,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:26,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:26,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 320 transitions, 4931 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 20:53:26,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:26,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:26,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:29,126 INFO L124 PetriNetUnfolderBase]: 6588/10582 cut-off events. [2024-06-27 20:53:29,127 INFO L125 PetriNetUnfolderBase]: For 542611/542613 co-relation queries the response was YES. [2024-06-27 20:53:29,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69869 conditions, 10582 events. 6588/10582 cut-off events. For 542611/542613 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 72130 event pairs, 2874 based on Foata normal form. 4/10585 useless extension candidates. Maximal degree in co-relation 69752. Up to 10105 conditions per place. [2024-06-27 20:53:29,224 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 81 changer transitions 0/353 dead transitions. [2024-06-27 20:53:29,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 353 transitions, 5887 flow [2024-06-27 20:53:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:53:29,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:53:29,226 INFO L175 Difference]: Start difference. First operand has 239 places, 320 transitions, 4931 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:53:29,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 353 transitions, 5887 flow [2024-06-27 20:53:29,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 353 transitions, 5787 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:29,881 INFO L231 Difference]: Finished difference. Result has 242 places, 323 transitions, 5093 flow [2024-06-27 20:53:29,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5093, PETRI_PLACES=242, PETRI_TRANSITIONS=323} [2024-06-27 20:53:29,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-27 20:53:29,882 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 323 transitions, 5093 flow [2024-06-27 20:53:29,882 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 20:53:29,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:29,882 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 20:53:29,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:53:29,882 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 20:53:29,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:29,883 INFO L85 PathProgramCache]: Analyzing trace with hash 402573417, now seen corresponding path program 3 times [2024-06-27 20:53:29,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:29,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787825323] [2024-06-27 20:53:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:29,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:32,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:32,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787825323] [2024-06-27 20:53:32,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787825323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:32,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:32,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:32,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809575512] [2024-06-27 20:53:32,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:32,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:32,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:32,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:32,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:32,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:32,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 323 transitions, 5093 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 20:53:32,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:32,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:32,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:36,023 INFO L124 PetriNetUnfolderBase]: 6630/10678 cut-off events. [2024-06-27 20:53:36,024 INFO L125 PetriNetUnfolderBase]: For 574163/574188 co-relation queries the response was YES. [2024-06-27 20:53:36,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71018 conditions, 10678 events. 6630/10678 cut-off events. For 574163/574188 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 72892 event pairs, 2636 based on Foata normal form. 27/10704 useless extension candidates. Maximal degree in co-relation 70900. Up to 9849 conditions per place. [2024-06-27 20:53:36,139 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 110 changer transitions 0/365 dead transitions. [2024-06-27 20:53:36,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 365 transitions, 6480 flow [2024-06-27 20:53:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:53:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:53:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:53:36,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 20:53:36,141 INFO L175 Difference]: Start difference. First operand has 242 places, 323 transitions, 5093 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:53:36,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 365 transitions, 6480 flow [2024-06-27 20:53:36,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 365 transitions, 6272 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:36,944 INFO L231 Difference]: Finished difference. Result has 245 places, 335 transitions, 5489 flow [2024-06-27 20:53:36,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4895, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5489, PETRI_PLACES=245, PETRI_TRANSITIONS=335} [2024-06-27 20:53:36,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-27 20:53:36,945 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 335 transitions, 5489 flow [2024-06-27 20:53:36,945 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 20:53:36,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:36,945 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 20:53:36,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:53:36,946 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 20:53:36,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:36,946 INFO L85 PathProgramCache]: Analyzing trace with hash 641067773, now seen corresponding path program 4 times [2024-06-27 20:53:36,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:36,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030638298] [2024-06-27 20:53:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:36,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:40,203 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 20:53:40,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:40,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030638298] [2024-06-27 20:53:40,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030638298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:40,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:40,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:40,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024176749] [2024-06-27 20:53:40,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:40,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:40,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:40,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:40,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:40,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:40,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 335 transitions, 5489 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 20:53:40,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:40,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:40,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:43,087 INFO L124 PetriNetUnfolderBase]: 6624/10670 cut-off events. [2024-06-27 20:53:43,087 INFO L125 PetriNetUnfolderBase]: For 580578/580603 co-relation queries the response was YES. [2024-06-27 20:53:43,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72377 conditions, 10670 events. 6624/10670 cut-off events. For 580578/580603 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 72941 event pairs, 2645 based on Foata normal form. 27/10696 useless extension candidates. Maximal degree in co-relation 72257. Up to 9846 conditions per place. [2024-06-27 20:53:43,209 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 111 changer transitions 0/359 dead transitions. [2024-06-27 20:53:43,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 359 transitions, 6457 flow [2024-06-27 20:53:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:53:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:53:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:53:43,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:53:43,211 INFO L175 Difference]: Start difference. First operand has 245 places, 335 transitions, 5489 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:53:43,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 359 transitions, 6457 flow [2024-06-27 20:53:44,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 359 transitions, 6319 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-27 20:53:44,261 INFO L231 Difference]: Finished difference. Result has 250 places, 335 transitions, 5579 flow [2024-06-27 20:53:44,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5351, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5579, PETRI_PLACES=250, PETRI_TRANSITIONS=335} [2024-06-27 20:53:44,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-27 20:53:44,262 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 335 transitions, 5579 flow [2024-06-27 20:53:44,262 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 20:53:44,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:44,262 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 20:53:44,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:53:44,262 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 20:53:44,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1887532605, now seen corresponding path program 5 times [2024-06-27 20:53:44,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:44,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314841833] [2024-06-27 20:53:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:44,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:47,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:47,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314841833] [2024-06-27 20:53:47,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314841833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:47,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:47,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:47,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405493916] [2024-06-27 20:53:47,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:47,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:47,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:47,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:47,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:53:47,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 335 transitions, 5579 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 20:53:47,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:47,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:53:47,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:50,036 INFO L124 PetriNetUnfolderBase]: 6606/10644 cut-off events. [2024-06-27 20:53:50,036 INFO L125 PetriNetUnfolderBase]: For 594095/594120 co-relation queries the response was YES. [2024-06-27 20:53:50,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72025 conditions, 10644 events. 6606/10644 cut-off events. For 594095/594120 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 72721 event pairs, 2566 based on Foata normal form. 31/10674 useless extension candidates. Maximal degree in co-relation 71903. Up to 9975 conditions per place. [2024-06-27 20:53:50,146 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 95 changer transitions 0/363 dead transitions. [2024-06-27 20:53:50,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 363 transitions, 6569 flow [2024-06-27 20:53:50,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:53:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:53:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:53:50,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 20:53:50,154 INFO L175 Difference]: Start difference. First operand has 250 places, 335 transitions, 5579 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:53:50,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 363 transitions, 6569 flow [2024-06-27 20:53:51,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 363 transitions, 6225 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:51,280 INFO L231 Difference]: Finished difference. Result has 252 places, 335 transitions, 5436 flow [2024-06-27 20:53:51,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5235, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5436, PETRI_PLACES=252, PETRI_TRANSITIONS=335} [2024-06-27 20:53:51,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-27 20:53:51,280 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 335 transitions, 5436 flow [2024-06-27 20:53:51,280 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 20:53:51,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:51,281 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 20:53:51,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:53:51,281 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 20:53:51,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:51,281 INFO L85 PathProgramCache]: Analyzing trace with hash -949482373, now seen corresponding path program 2 times [2024-06-27 20:53:51,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:51,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038031860] [2024-06-27 20:53:51,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:51,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:54,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:54,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038031860] [2024-06-27 20:53:54,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038031860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:54,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:54,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:54,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759097906] [2024-06-27 20:53:54,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:54,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:54,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:54,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:54,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:54,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:54,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 335 transitions, 5436 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:54,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:54,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:54,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:57,827 INFO L124 PetriNetUnfolderBase]: 6573/10615 cut-off events. [2024-06-27 20:53:57,828 INFO L125 PetriNetUnfolderBase]: For 635314/635365 co-relation queries the response was YES. [2024-06-27 20:53:57,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72075 conditions, 10615 events. 6573/10615 cut-off events. For 635314/635365 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 72820 event pairs, 2551 based on Foata normal form. 48/10633 useless extension candidates. Maximal degree in co-relation 71953. Up to 9847 conditions per place. [2024-06-27 20:53:57,948 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 97 changer transitions 0/368 dead transitions. [2024-06-27 20:53:57,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 368 transitions, 6488 flow [2024-06-27 20:53:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:53:57,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:53:57,950 INFO L175 Difference]: Start difference. First operand has 252 places, 335 transitions, 5436 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:53:57,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 368 transitions, 6488 flow [2024-06-27 20:53:59,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 368 transitions, 6202 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:53:59,188 INFO L231 Difference]: Finished difference. Result has 252 places, 337 transitions, 5411 flow [2024-06-27 20:53:59,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5150, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5411, PETRI_PLACES=252, PETRI_TRANSITIONS=337} [2024-06-27 20:53:59,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-27 20:53:59,189 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 337 transitions, 5411 flow [2024-06-27 20:53:59,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:59,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:59,190 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 20:53:59,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:53:59,190 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 20:53:59,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:59,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1349383303, now seen corresponding path program 3 times [2024-06-27 20:53:59,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:59,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344232387] [2024-06-27 20:53:59,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:59,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:03,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:03,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344232387] [2024-06-27 20:54:03,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344232387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:03,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:03,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792097472] [2024-06-27 20:54:03,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:03,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:03,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:03,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:03,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 337 transitions, 5411 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:03,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:03,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:03,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:06,396 INFO L124 PetriNetUnfolderBase]: 6624/10664 cut-off events. [2024-06-27 20:54:06,396 INFO L125 PetriNetUnfolderBase]: For 659880/659911 co-relation queries the response was YES. [2024-06-27 20:54:06,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73152 conditions, 10664 events. 6624/10664 cut-off events. For 659880/659911 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 73120 event pairs, 2881 based on Foata normal form. 28/10664 useless extension candidates. Maximal degree in co-relation 73029. Up to 10059 conditions per place. [2024-06-27 20:54:06,522 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 73 changer transitions 0/373 dead transitions. [2024-06-27 20:54:06,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 373 transitions, 6275 flow [2024-06-27 20:54:06,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:54:06,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:54:06,523 INFO L175 Difference]: Start difference. First operand has 252 places, 337 transitions, 5411 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:54:06,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 373 transitions, 6275 flow [2024-06-27 20:54:07,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 373 transitions, 6042 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:07,436 INFO L231 Difference]: Finished difference. Result has 254 places, 339 transitions, 5406 flow [2024-06-27 20:54:07,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5178, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5406, PETRI_PLACES=254, PETRI_TRANSITIONS=339} [2024-06-27 20:54:07,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-27 20:54:07,437 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 339 transitions, 5406 flow [2024-06-27 20:54:07,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:07,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:07,437 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 20:54:07,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:54:07,437 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 20:54:07,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:07,438 INFO L85 PathProgramCache]: Analyzing trace with hash -935601193, now seen corresponding path program 4 times [2024-06-27 20:54:07,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:07,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841055107] [2024-06-27 20:54:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:07,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:11,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:11,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841055107] [2024-06-27 20:54:11,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841055107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:11,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:11,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:11,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208082456] [2024-06-27 20:54:11,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:11,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:11,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:11,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:11,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:11,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:11,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 339 transitions, 5406 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:11,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:11,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:11,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:14,511 INFO L124 PetriNetUnfolderBase]: 6736/10864 cut-off events. [2024-06-27 20:54:14,511 INFO L125 PetriNetUnfolderBase]: For 693431/693482 co-relation queries the response was YES. [2024-06-27 20:54:14,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74924 conditions, 10864 events. 6736/10864 cut-off events. For 693431/693482 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 74652 event pairs, 2560 based on Foata normal form. 48/10882 useless extension candidates. Maximal degree in co-relation 74800. Up to 9716 conditions per place. [2024-06-27 20:54:14,617 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 104 changer transitions 0/378 dead transitions. [2024-06-27 20:54:14,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 378 transitions, 6670 flow [2024-06-27 20:54:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:54:14,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:54:14,619 INFO L175 Difference]: Start difference. First operand has 254 places, 339 transitions, 5406 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:54:14,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 378 transitions, 6670 flow [2024-06-27 20:54:15,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 378 transitions, 6481 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 20:54:15,710 INFO L231 Difference]: Finished difference. Result has 255 places, 342 transitions, 5524 flow [2024-06-27 20:54:15,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5217, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5524, PETRI_PLACES=255, PETRI_TRANSITIONS=342} [2024-06-27 20:54:15,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-27 20:54:15,712 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 342 transitions, 5524 flow [2024-06-27 20:54:15,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:15,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:15,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:15,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:54:15,713 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 20:54:15,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:15,713 INFO L85 PathProgramCache]: Analyzing trace with hash -146262273, now seen corresponding path program 1 times [2024-06-27 20:54:15,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:15,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838867707] [2024-06-27 20:54:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:15,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:18,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838867707] [2024-06-27 20:54:18,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838867707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:18,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:18,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712400322] [2024-06-27 20:54:18,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:18,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:18,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:18,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:18,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:18,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:18,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 342 transitions, 5524 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 20:54:18,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:18,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:18,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:21,607 INFO L124 PetriNetUnfolderBase]: 6912/11100 cut-off events. [2024-06-27 20:54:21,608 INFO L125 PetriNetUnfolderBase]: For 708758/708760 co-relation queries the response was YES. [2024-06-27 20:54:21,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77362 conditions, 11100 events. 6912/11100 cut-off events. For 708758/708760 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 75950 event pairs, 2887 based on Foata normal form. 4/11103 useless extension candidates. Maximal degree in co-relation 77237. Up to 10685 conditions per place. [2024-06-27 20:54:21,721 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 342 selfloop transitions, 32 changer transitions 0/378 dead transitions. [2024-06-27 20:54:21,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 378 transitions, 6626 flow [2024-06-27 20:54:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:21,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:54:21,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:54:21,723 INFO L175 Difference]: Start difference. First operand has 255 places, 342 transitions, 5524 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:54:21,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 378 transitions, 6626 flow [2024-06-27 20:54:22,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 378 transitions, 6454 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 20:54:22,817 INFO L231 Difference]: Finished difference. Result has 258 places, 346 transitions, 5565 flow [2024-06-27 20:54:22,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5352, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5565, PETRI_PLACES=258, PETRI_TRANSITIONS=346} [2024-06-27 20:54:22,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-27 20:54:22,817 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 346 transitions, 5565 flow [2024-06-27 20:54:22,817 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 20:54:22,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:22,818 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 20:54:22,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:54:22,818 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 20:54:22,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash 638280191, now seen corresponding path program 2 times [2024-06-27 20:54:22,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:22,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143248144] [2024-06-27 20:54:22,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:22,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143248144] [2024-06-27 20:54:25,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143248144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:25,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:25,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:25,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637390723] [2024-06-27 20:54:25,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:25,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:25,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:25,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:25,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:25,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:25,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 346 transitions, 5565 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 20:54:25,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:25,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:25,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:28,870 INFO L124 PetriNetUnfolderBase]: 6920/11112 cut-off events. [2024-06-27 20:54:28,870 INFO L125 PetriNetUnfolderBase]: For 728362/728364 co-relation queries the response was YES. [2024-06-27 20:54:28,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77774 conditions, 11112 events. 6920/11112 cut-off events. For 728362/728364 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 76056 event pairs, 2923 based on Foata normal form. 4/11115 useless extension candidates. Maximal degree in co-relation 77647. Up to 10812 conditions per place. [2024-06-27 20:54:28,984 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 337 selfloop transitions, 29 changer transitions 0/370 dead transitions. [2024-06-27 20:54:28,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 370 transitions, 6421 flow [2024-06-27 20:54:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:54:28,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:54:28,986 INFO L175 Difference]: Start difference. First operand has 258 places, 346 transitions, 5565 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:54:28,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 370 transitions, 6421 flow [2024-06-27 20:54:30,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 370 transitions, 6311 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 20:54:30,372 INFO L231 Difference]: Finished difference. Result has 262 places, 348 transitions, 5596 flow [2024-06-27 20:54:30,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5461, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5596, PETRI_PLACES=262, PETRI_TRANSITIONS=348} [2024-06-27 20:54:30,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-27 20:54:30,373 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 348 transitions, 5596 flow [2024-06-27 20:54:30,373 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 20:54:30,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:30,373 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 20:54:30,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:54:30,374 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 20:54:30,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1887541533, now seen corresponding path program 3 times [2024-06-27 20:54:30,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:30,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908014581] [2024-06-27 20:54:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:30,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:33,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:33,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908014581] [2024-06-27 20:54:33,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908014581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:33,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:33,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:33,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384701236] [2024-06-27 20:54:33,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:33,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:33,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:33,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:33,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:33,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:33,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 348 transitions, 5596 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 20:54:33,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:33,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:33,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:36,844 INFO L124 PetriNetUnfolderBase]: 6887/11065 cut-off events. [2024-06-27 20:54:36,844 INFO L125 PetriNetUnfolderBase]: For 747805/747807 co-relation queries the response was YES. [2024-06-27 20:54:36,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77090 conditions, 11065 events. 6887/11065 cut-off events. For 747805/747807 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 75688 event pairs, 2862 based on Foata normal form. 16/11080 useless extension candidates. Maximal degree in co-relation 76961. Up to 10715 conditions per place. [2024-06-27 20:54:36,955 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 347 selfloop transitions, 27 changer transitions 0/378 dead transitions. [2024-06-27 20:54:36,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 378 transitions, 6442 flow [2024-06-27 20:54:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:54:36,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 20:54:36,957 INFO L175 Difference]: Start difference. First operand has 262 places, 348 transitions, 5596 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:54:36,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 378 transitions, 6442 flow [2024-06-27 20:54:38,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 378 transitions, 6277 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 20:54:38,221 INFO L231 Difference]: Finished difference. Result has 264 places, 348 transitions, 5494 flow [2024-06-27 20:54:38,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5431, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5494, PETRI_PLACES=264, PETRI_TRANSITIONS=348} [2024-06-27 20:54:38,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-27 20:54:38,222 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 348 transitions, 5494 flow [2024-06-27 20:54:38,222 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 20:54:38,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:38,222 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 20:54:38,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:54:38,222 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 20:54:38,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1058667220, now seen corresponding path program 1 times [2024-06-27 20:54:38,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:38,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859343746] [2024-06-27 20:54:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:38,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:41,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:41,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859343746] [2024-06-27 20:54:41,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859343746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:41,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:41,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:41,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264891005] [2024-06-27 20:54:41,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:41,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:41,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:41,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:41,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:41,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:41,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 348 transitions, 5494 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 20:54:41,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:41,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:41,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:45,001 INFO L124 PetriNetUnfolderBase]: 6915/11108 cut-off events. [2024-06-27 20:54:45,001 INFO L125 PetriNetUnfolderBase]: For 757498/757498 co-relation queries the response was YES. [2024-06-27 20:54:45,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77466 conditions, 11108 events. 6915/11108 cut-off events. For 757498/757498 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 75839 event pairs, 2790 based on Foata normal form. 8/11115 useless extension candidates. Maximal degree in co-relation 77336. Up to 10790 conditions per place. [2024-06-27 20:54:45,145 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 358 selfloop transitions, 30 changer transitions 0/392 dead transitions. [2024-06-27 20:54:45,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 392 transitions, 6430 flow [2024-06-27 20:54:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:54:45,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:54:45,147 INFO L175 Difference]: Start difference. First operand has 264 places, 348 transitions, 5494 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:54:45,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 392 transitions, 6430 flow [2024-06-27 20:54:46,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 392 transitions, 6369 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:46,839 INFO L231 Difference]: Finished difference. Result has 268 places, 351 transitions, 5554 flow [2024-06-27 20:54:46,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5433, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5554, PETRI_PLACES=268, PETRI_TRANSITIONS=351} [2024-06-27 20:54:46,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-27 20:54:46,840 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 351 transitions, 5554 flow [2024-06-27 20:54:46,840 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 20:54:46,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:46,840 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 20:54:46,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:54:46,840 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 20:54:46,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:46,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1051257910, now seen corresponding path program 2 times [2024-06-27 20:54:46,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:46,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714791471] [2024-06-27 20:54:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:46,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:50,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:50,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714791471] [2024-06-27 20:54:50,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714791471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:50,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:50,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:50,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954110163] [2024-06-27 20:54:50,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:50,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:50,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:50,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:50,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:50,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:50,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 351 transitions, 5554 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 20:54:50,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:50,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:50,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:53,446 INFO L124 PetriNetUnfolderBase]: 7010/11253 cut-off events. [2024-06-27 20:54:53,446 INFO L125 PetriNetUnfolderBase]: For 798290/798290 co-relation queries the response was YES. [2024-06-27 20:54:53,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79100 conditions, 11253 events. 7010/11253 cut-off events. For 798290/798290 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 77211 event pairs, 3029 based on Foata normal form. 8/11260 useless extension candidates. Maximal degree in co-relation 78968. Up to 10914 conditions per place. [2024-06-27 20:54:53,605 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 362 selfloop transitions, 32 changer transitions 0/398 dead transitions. [2024-06-27 20:54:53,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 398 transitions, 6644 flow [2024-06-27 20:54:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 20:54:53,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 20:54:53,607 INFO L175 Difference]: Start difference. First operand has 268 places, 351 transitions, 5554 flow. Second operand 10 states and 161 transitions. [2024-06-27 20:54:53,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 398 transitions, 6644 flow [2024-06-27 20:54:55,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 398 transitions, 6550 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:55,391 INFO L231 Difference]: Finished difference. Result has 273 places, 355 transitions, 5584 flow [2024-06-27 20:54:55,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5464, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5584, PETRI_PLACES=273, PETRI_TRANSITIONS=355} [2024-06-27 20:54:55,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 20:54:55,392 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 355 transitions, 5584 flow [2024-06-27 20:54:55,392 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 20:54:55,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:55,393 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 20:54:55,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:54:55,393 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 20:54:55,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash -792643510, now seen corresponding path program 3 times [2024-06-27 20:54:55,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:55,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517992475] [2024-06-27 20:54:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:55,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:59,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:59,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517992475] [2024-06-27 20:54:59,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517992475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:59,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:59,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402394926] [2024-06-27 20:54:59,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:59,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:59,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:59,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:54:59,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 355 transitions, 5584 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 20:54:59,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:59,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:54:59,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:02,405 INFO L124 PetriNetUnfolderBase]: 6987/11220 cut-off events. [2024-06-27 20:55:02,405 INFO L125 PetriNetUnfolderBase]: For 806521/806521 co-relation queries the response was YES. [2024-06-27 20:55:02,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78732 conditions, 11220 events. 6987/11220 cut-off events. For 806521/806521 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 76948 event pairs, 3045 based on Foata normal form. 10/11229 useless extension candidates. Maximal degree in co-relation 78598. Up to 10942 conditions per place. [2024-06-27 20:55:02,548 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 359 selfloop transitions, 29 changer transitions 0/392 dead transitions. [2024-06-27 20:55:02,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 392 transitions, 6474 flow [2024-06-27 20:55:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:55:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:55:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:55:02,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 20:55:02,549 INFO L175 Difference]: Start difference. First operand has 273 places, 355 transitions, 5584 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:55:02,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 392 transitions, 6474 flow [2024-06-27 20:55:04,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 392 transitions, 6440 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 20:55:04,258 INFO L231 Difference]: Finished difference. Result has 277 places, 355 transitions, 5613 flow [2024-06-27 20:55:04,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5613, PETRI_PLACES=277, PETRI_TRANSITIONS=355} [2024-06-27 20:55:04,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-27 20:55:04,259 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 355 transitions, 5613 flow [2024-06-27 20:55:04,259 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 20:55:04,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:04,259 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 20:55:04,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:55:04,260 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 20:55:04,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:04,260 INFO L85 PathProgramCache]: Analyzing trace with hash -970129360, now seen corresponding path program 1 times [2024-06-27 20:55:04,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:04,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627100053] [2024-06-27 20:55:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:04,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:07,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:07,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627100053] [2024-06-27 20:55:07,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627100053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:07,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:07,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:07,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521316678] [2024-06-27 20:55:07,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:07,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:07,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:07,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:07,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:07,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:07,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 355 transitions, 5613 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 20:55:07,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:07,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:07,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:11,130 INFO L124 PetriNetUnfolderBase]: 7077/11351 cut-off events. [2024-06-27 20:55:11,130 INFO L125 PetriNetUnfolderBase]: For 833484/833486 co-relation queries the response was YES. [2024-06-27 20:55:11,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80760 conditions, 11351 events. 7077/11351 cut-off events. For 833484/833486 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 77648 event pairs, 2848 based on Foata normal form. 4/11354 useless extension candidates. Maximal degree in co-relation 80624. Up to 10164 conditions per place. [2024-06-27 20:55:11,277 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 261 selfloop transitions, 161 changer transitions 0/426 dead transitions. [2024-06-27 20:55:11,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 426 transitions, 7211 flow [2024-06-27 20:55:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:55:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:55:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-06-27 20:55:11,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 20:55:11,280 INFO L175 Difference]: Start difference. First operand has 277 places, 355 transitions, 5613 flow. Second operand 12 states and 217 transitions. [2024-06-27 20:55:11,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 426 transitions, 7211 flow [2024-06-27 20:55:13,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 426 transitions, 7158 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:13,132 INFO L231 Difference]: Finished difference. Result has 283 places, 364 transitions, 6078 flow [2024-06-27 20:55:13,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6078, PETRI_PLACES=283, PETRI_TRANSITIONS=364} [2024-06-27 20:55:13,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 20:55:13,132 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 364 transitions, 6078 flow [2024-06-27 20:55:13,133 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 20:55:13,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:13,133 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 20:55:13,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:55:13,133 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 20:55:13,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:13,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1507991342, now seen corresponding path program 1 times [2024-06-27 20:55:13,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:13,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271091756] [2024-06-27 20:55:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:13,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:16,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:16,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271091756] [2024-06-27 20:55:16,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271091756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:16,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:16,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589186058] [2024-06-27 20:55:16,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:16,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:16,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:16,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:16,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:16,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:16,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 364 transitions, 6078 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 20:55:16,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:16,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:16,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:20,080 INFO L124 PetriNetUnfolderBase]: 7142/11444 cut-off events. [2024-06-27 20:55:20,080 INFO L125 PetriNetUnfolderBase]: For 881541/881543 co-relation queries the response was YES. [2024-06-27 20:55:20,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84190 conditions, 11444 events. 7142/11444 cut-off events. For 881541/881543 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 78372 event pairs, 3071 based on Foata normal form. 8/11451 useless extension candidates. Maximal degree in co-relation 84053. Up to 11051 conditions per place. [2024-06-27 20:55:20,229 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 340 selfloop transitions, 67 changer transitions 3/414 dead transitions. [2024-06-27 20:55:20,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 414 transitions, 7118 flow [2024-06-27 20:55:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:55:20,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 20:55:20,231 INFO L175 Difference]: Start difference. First operand has 283 places, 364 transitions, 6078 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:55:20,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 414 transitions, 7118 flow [2024-06-27 20:55:22,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 414 transitions, 6853 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 20:55:22,328 INFO L231 Difference]: Finished difference. Result has 287 places, 373 transitions, 6080 flow [2024-06-27 20:55:22,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5822, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6080, PETRI_PLACES=287, PETRI_TRANSITIONS=373} [2024-06-27 20:55:22,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 20:55:22,329 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 373 transitions, 6080 flow [2024-06-27 20:55:22,329 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 20:55:22,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:22,329 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 20:55:22,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:55:22,330 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 20:55:22,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:22,330 INFO L85 PathProgramCache]: Analyzing trace with hash -965367574, now seen corresponding path program 2 times [2024-06-27 20:55:22,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:22,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200289652] [2024-06-27 20:55:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:22,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:25,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200289652] [2024-06-27 20:55:25,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200289652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:25,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:25,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:25,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562769901] [2024-06-27 20:55:25,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:25,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:25,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:25,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:25,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:25,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:25,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 373 transitions, 6080 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 20:55:25,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:25,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:25,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:29,293 INFO L124 PetriNetUnfolderBase]: 7298/11666 cut-off events. [2024-06-27 20:55:29,293 INFO L125 PetriNetUnfolderBase]: For 925254/925256 co-relation queries the response was YES. [2024-06-27 20:55:29,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86615 conditions, 11666 events. 7298/11666 cut-off events. For 925254/925256 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 79823 event pairs, 3043 based on Foata normal form. 8/11673 useless extension candidates. Maximal degree in co-relation 86475. Up to 11149 conditions per place. [2024-06-27 20:55:29,451 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 343 selfloop transitions, 91 changer transitions 1/439 dead transitions. [2024-06-27 20:55:29,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 439 transitions, 7703 flow [2024-06-27 20:55:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:55:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:55:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-27 20:55:29,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-27 20:55:29,453 INFO L175 Difference]: Start difference. First operand has 287 places, 373 transitions, 6080 flow. Second operand 11 states and 182 transitions. [2024-06-27 20:55:29,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 439 transitions, 7703 flow [2024-06-27 20:55:31,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 439 transitions, 7479 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:55:31,594 INFO L231 Difference]: Finished difference. Result has 292 places, 395 transitions, 6457 flow [2024-06-27 20:55:31,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5877, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6457, PETRI_PLACES=292, PETRI_TRANSITIONS=395} [2024-06-27 20:55:31,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-27 20:55:31,594 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 395 transitions, 6457 flow [2024-06-27 20:55:31,595 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 20:55:31,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:31,595 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 20:55:31,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:55:31,595 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 20:55:31,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:31,595 INFO L85 PathProgramCache]: Analyzing trace with hash -792640534, now seen corresponding path program 3 times [2024-06-27 20:55:31,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:31,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259515209] [2024-06-27 20:55:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:31,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:35,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:35,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259515209] [2024-06-27 20:55:35,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259515209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:35,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:35,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:35,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190327670] [2024-06-27 20:55:35,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:35,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:35,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:35,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:35,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:35,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:35,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 395 transitions, 6457 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 20:55:35,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:35,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:35,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:38,612 INFO L124 PetriNetUnfolderBase]: 7280/11634 cut-off events. [2024-06-27 20:55:38,613 INFO L125 PetriNetUnfolderBase]: For 939705/939707 co-relation queries the response was YES. [2024-06-27 20:55:38,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86926 conditions, 11634 events. 7280/11634 cut-off events. For 939705/939707 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 79498 event pairs, 3030 based on Foata normal form. 4/11637 useless extension candidates. Maximal degree in co-relation 86784. Up to 11138 conditions per place. [2024-06-27 20:55:38,759 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 337 selfloop transitions, 92 changer transitions 2/435 dead transitions. [2024-06-27 20:55:38,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 435 transitions, 7574 flow [2024-06-27 20:55:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-27 20:55:38,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-27 20:55:38,769 INFO L175 Difference]: Start difference. First operand has 292 places, 395 transitions, 6457 flow. Second operand 10 states and 166 transitions. [2024-06-27 20:55:38,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 435 transitions, 7574 flow [2024-06-27 20:55:40,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 435 transitions, 7488 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 20:55:40,804 INFO L231 Difference]: Finished difference. Result has 300 places, 396 transitions, 6612 flow [2024-06-27 20:55:40,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6612, PETRI_PLACES=300, PETRI_TRANSITIONS=396} [2024-06-27 20:55:40,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-27 20:55:40,805 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 396 transitions, 6612 flow [2024-06-27 20:55:40,805 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 20:55:40,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:40,806 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 20:55:40,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:55:40,806 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 20:55:40,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:40,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1027053010, now seen corresponding path program 4 times [2024-06-27 20:55:40,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:40,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588177229] [2024-06-27 20:55:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:40,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:45,154 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 20:55:45,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588177229] [2024-06-27 20:55:45,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588177229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:45,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:45,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:45,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443284407] [2024-06-27 20:55:45,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:45,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:45,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:45,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:45,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:45,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:45,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 396 transitions, 6612 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 20:55:45,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:45,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:45,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:48,671 INFO L124 PetriNetUnfolderBase]: 7292/11657 cut-off events. [2024-06-27 20:55:48,671 INFO L125 PetriNetUnfolderBase]: For 982422/982422 co-relation queries the response was YES. [2024-06-27 20:55:48,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87732 conditions, 11657 events. 7292/11657 cut-off events. For 982422/982422 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 79731 event pairs, 3092 based on Foata normal form. 10/11666 useless extension candidates. Maximal degree in co-relation 87586. Up to 11357 conditions per place. [2024-06-27 20:55:48,850 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 389 selfloop transitions, 37 changer transitions 0/430 dead transitions. [2024-06-27 20:55:48,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 430 transitions, 7580 flow [2024-06-27 20:55:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:55:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:55:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-27 20:55:48,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.354978354978355 [2024-06-27 20:55:48,852 INFO L175 Difference]: Start difference. First operand has 300 places, 396 transitions, 6612 flow. Second operand 11 states and 164 transitions. [2024-06-27 20:55:48,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 430 transitions, 7580 flow [2024-06-27 20:55:50,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 430 transitions, 7427 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:50,854 INFO L231 Difference]: Finished difference. Result has 305 places, 397 transitions, 6551 flow [2024-06-27 20:55:50,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6459, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6551, PETRI_PLACES=305, PETRI_TRANSITIONS=397} [2024-06-27 20:55:50,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-27 20:55:50,855 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 397 transitions, 6551 flow [2024-06-27 20:55:50,855 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 20:55:50,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:50,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:50,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:55:50,855 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 20:55:50,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:50,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1027379440, now seen corresponding path program 5 times [2024-06-27 20:55:50,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:50,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693243840] [2024-06-27 20:55:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:50,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:54,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:54,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693243840] [2024-06-27 20:55:54,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693243840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:54,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:54,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:54,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493962247] [2024-06-27 20:55:54,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:54,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:54,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:54,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:54,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:54,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:55:54,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 397 transitions, 6551 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 20:55:54,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:54,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:55:54,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:58,312 INFO L124 PetriNetUnfolderBase]: 7387/11802 cut-off events. [2024-06-27 20:55:58,313 INFO L125 PetriNetUnfolderBase]: For 1027896/1027896 co-relation queries the response was YES. [2024-06-27 20:55:58,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89378 conditions, 11802 events. 7387/11802 cut-off events. For 1027896/1027896 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 80764 event pairs, 3105 based on Foata normal form. 8/11809 useless extension candidates. Maximal degree in co-relation 89231. Up to 11399 conditions per place. [2024-06-27 20:55:58,454 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 393 selfloop transitions, 41 changer transitions 0/438 dead transitions. [2024-06-27 20:55:58,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 438 transitions, 7732 flow [2024-06-27 20:55:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:55:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:55:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-27 20:55:58,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36147186147186144 [2024-06-27 20:55:58,456 INFO L175 Difference]: Start difference. First operand has 305 places, 397 transitions, 6551 flow. Second operand 11 states and 167 transitions. [2024-06-27 20:55:58,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 438 transitions, 7732 flow [2024-06-27 20:56:00,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 438 transitions, 7673 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:56:00,529 INFO L231 Difference]: Finished difference. Result has 310 places, 401 transitions, 6645 flow [2024-06-27 20:56:00,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6645, PETRI_PLACES=310, PETRI_TRANSITIONS=401} [2024-06-27 20:56:00,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-27 20:56:00,530 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 401 transitions, 6645 flow [2024-06-27 20:56:00,530 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 20:56:00,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:00,530 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, 1] [2024-06-27 20:56:00,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:56:00,530 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 20:56:00,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:00,531 INFO L85 PathProgramCache]: Analyzing trace with hash 699716754, now seen corresponding path program 6 times [2024-06-27 20:56:00,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:00,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993919833] [2024-06-27 20:56:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:00,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:04,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:04,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993919833] [2024-06-27 20:56:04,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993919833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:04,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:04,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:04,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595378589] [2024-06-27 20:56:04,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:04,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:04,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:04,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:04,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:04,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:04,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 401 transitions, 6645 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 20:56:04,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:04,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:04,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:07,526 INFO L124 PetriNetUnfolderBase]: 7364/11769 cut-off events. [2024-06-27 20:56:07,526 INFO L125 PetriNetUnfolderBase]: For 1037578/1037578 co-relation queries the response was YES. [2024-06-27 20:56:07,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89090 conditions, 11769 events. 7364/11769 cut-off events. For 1037578/1037578 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 80618 event pairs, 3106 based on Foata normal form. 10/11778 useless extension candidates. Maximal degree in co-relation 88941. Up to 11469 conditions per place. [2024-06-27 20:56:07,673 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 391 selfloop transitions, 36 changer transitions 0/431 dead transitions. [2024-06-27 20:56:07,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 431 transitions, 7598 flow [2024-06-27 20:56:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:56:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:56:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 20:56:07,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 20:56:07,675 INFO L175 Difference]: Start difference. First operand has 310 places, 401 transitions, 6645 flow. Second operand 9 states and 141 transitions. [2024-06-27 20:56:07,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 431 transitions, 7598 flow [2024-06-27 20:56:10,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 431 transitions, 7543 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:56:10,042 INFO L231 Difference]: Finished difference. Result has 312 places, 401 transitions, 6667 flow [2024-06-27 20:56:10,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6590, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6667, PETRI_PLACES=312, PETRI_TRANSITIONS=401} [2024-06-27 20:56:10,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-27 20:56:10,043 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 401 transitions, 6667 flow [2024-06-27 20:56:10,043 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 20:56:10,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:10,043 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 20:56:10,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:56:10,044 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 20:56:10,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:10,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2071277152, now seen corresponding path program 2 times [2024-06-27 20:56:10,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:10,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578045685] [2024-06-27 20:56:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:10,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:13,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578045685] [2024-06-27 20:56:13,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578045685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:13,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:13,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:13,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466098852] [2024-06-27 20:56:13,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:13,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:13,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:13,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:13,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:13,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:13,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 401 transitions, 6667 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 20:56:13,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:13,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:13,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:17,532 INFO L124 PetriNetUnfolderBase]: 7524/11988 cut-off events. [2024-06-27 20:56:17,532 INFO L125 PetriNetUnfolderBase]: For 1086382/1086384 co-relation queries the response was YES. [2024-06-27 20:56:17,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92489 conditions, 11988 events. 7524/11988 cut-off events. For 1086382/1086384 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 81784 event pairs, 2935 based on Foata normal form. 4/11991 useless extension candidates. Maximal degree in co-relation 92338. Up to 11141 conditions per place. [2024-06-27 20:56:17,683 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 356 selfloop transitions, 128 changer transitions 0/488 dead transitions. [2024-06-27 20:56:17,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 488 transitions, 8953 flow [2024-06-27 20:56:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:56:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:56:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 230 transitions. [2024-06-27 20:56:17,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42124542124542125 [2024-06-27 20:56:17,685 INFO L175 Difference]: Start difference. First operand has 312 places, 401 transitions, 6667 flow. Second operand 13 states and 230 transitions. [2024-06-27 20:56:17,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 488 transitions, 8953 flow [2024-06-27 20:56:19,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 488 transitions, 8880 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:56:19,777 INFO L231 Difference]: Finished difference. Result has 320 places, 421 transitions, 7402 flow [2024-06-27 20:56:19,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6594, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7402, PETRI_PLACES=320, PETRI_TRANSITIONS=421} [2024-06-27 20:56:19,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 20:56:19,778 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 421 transitions, 7402 flow [2024-06-27 20:56:19,778 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 20:56:19,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:19,778 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 20:56:19,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:56:19,779 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 20:56:19,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1685409104, now seen corresponding path program 1 times [2024-06-27 20:56:19,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:19,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947735195] [2024-06-27 20:56:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:19,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:23,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:23,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947735195] [2024-06-27 20:56:23,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947735195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:23,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:23,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:23,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213753366] [2024-06-27 20:56:23,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:23,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:23,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:23,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:23,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:23,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 421 transitions, 7402 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 20:56:23,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:23,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:23,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:27,507 INFO L124 PetriNetUnfolderBase]: 7512/11952 cut-off events. [2024-06-27 20:56:27,508 INFO L125 PetriNetUnfolderBase]: For 1115395/1115397 co-relation queries the response was YES. [2024-06-27 20:56:27,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93431 conditions, 11952 events. 7512/11952 cut-off events. For 1115395/1115397 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 81485 event pairs, 3107 based on Foata normal form. 6/11957 useless extension candidates. Maximal degree in co-relation 93277. Up to 11479 conditions per place. [2024-06-27 20:56:27,673 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 382 selfloop transitions, 81 changer transitions 0/467 dead transitions. [2024-06-27 20:56:27,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 467 transitions, 8582 flow [2024-06-27 20:56:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:56:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:56:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-27 20:56:27,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-27 20:56:27,675 INFO L175 Difference]: Start difference. First operand has 320 places, 421 transitions, 7402 flow. Second operand 11 states and 183 transitions. [2024-06-27 20:56:27,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 467 transitions, 8582 flow [2024-06-27 20:56:30,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 467 transitions, 8348 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 20:56:30,240 INFO L231 Difference]: Finished difference. Result has 324 places, 421 transitions, 7336 flow [2024-06-27 20:56:30,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7168, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7336, PETRI_PLACES=324, PETRI_TRANSITIONS=421} [2024-06-27 20:56:30,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 20:56:30,241 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 421 transitions, 7336 flow [2024-06-27 20:56:30,241 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 20:56:30,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:30,242 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 20:56:30,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:56:30,242 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 20:56:30,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:30,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1691070386, now seen corresponding path program 3 times [2024-06-27 20:56:30,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:30,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028299768] [2024-06-27 20:56:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:30,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:33,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:33,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028299768] [2024-06-27 20:56:33,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028299768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:33,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:33,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:33,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126480421] [2024-06-27 20:56:33,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:33,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:33,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:33,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:33,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:33,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:33,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 421 transitions, 7336 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 20:56:33,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:33,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:33,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:38,155 INFO L124 PetriNetUnfolderBase]: 7506/11956 cut-off events. [2024-06-27 20:56:38,155 INFO L125 PetriNetUnfolderBase]: For 1131244/1131246 co-relation queries the response was YES. [2024-06-27 20:56:38,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93584 conditions, 11956 events. 7506/11956 cut-off events. For 1131244/1131246 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 81564 event pairs, 2908 based on Foata normal form. 4/11959 useless extension candidates. Maximal degree in co-relation 93428. Up to 11134 conditions per place. [2024-06-27 20:56:38,298 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 351 selfloop transitions, 122 changer transitions 0/477 dead transitions. [2024-06-27 20:56:38,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 477 transitions, 8704 flow [2024-06-27 20:56:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:56:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:56:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-27 20:56:38,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-06-27 20:56:38,299 INFO L175 Difference]: Start difference. First operand has 324 places, 421 transitions, 7336 flow. Second operand 11 states and 199 transitions. [2024-06-27 20:56:38,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 477 transitions, 8704 flow [2024-06-27 20:56:41,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 477 transitions, 8458 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-27 20:56:41,213 INFO L231 Difference]: Finished difference. Result has 325 places, 421 transitions, 7340 flow [2024-06-27 20:56:41,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7090, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7340, PETRI_PLACES=325, PETRI_TRANSITIONS=421} [2024-06-27 20:56:41,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-27 20:56:41,214 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 421 transitions, 7340 flow [2024-06-27 20:56:41,214 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 20:56:41,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:41,214 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 20:56:41,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:56:41,214 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 20:56:41,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:41,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1690950230, now seen corresponding path program 4 times [2024-06-27 20:56:41,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:41,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833031673] [2024-06-27 20:56:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:41,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:44,701 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 20:56:44,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:44,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833031673] [2024-06-27 20:56:44,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833031673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:44,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:44,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:44,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056462789] [2024-06-27 20:56:44,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:44,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:44,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:44,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:44,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 421 transitions, 7340 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 20:56:44,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:44,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:44,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:48,552 INFO L124 PetriNetUnfolderBase]: 7480/11932 cut-off events. [2024-06-27 20:56:48,552 INFO L125 PetriNetUnfolderBase]: For 1154854/1154856 co-relation queries the response was YES. [2024-06-27 20:56:48,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93360 conditions, 11932 events. 7480/11932 cut-off events. For 1154854/1154856 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 81492 event pairs, 3110 based on Foata normal form. 8/11939 useless extension candidates. Maximal degree in co-relation 93203. Up to 11612 conditions per place. [2024-06-27 20:56:48,750 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 402 selfloop transitions, 48 changer transitions 3/457 dead transitions. [2024-06-27 20:56:48,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 457 transitions, 8338 flow [2024-06-27 20:56:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:56:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:56:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 20:56:48,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 20:56:48,752 INFO L175 Difference]: Start difference. First operand has 325 places, 421 transitions, 7340 flow. Second operand 10 states and 162 transitions. [2024-06-27 20:56:48,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 457 transitions, 8338 flow [2024-06-27 20:56:51,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 457 transitions, 8088 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:56:51,843 INFO L231 Difference]: Finished difference. Result has 326 places, 419 transitions, 7149 flow [2024-06-27 20:56:51,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7090, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7149, PETRI_PLACES=326, PETRI_TRANSITIONS=419} [2024-06-27 20:56:51,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-27 20:56:51,843 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 419 transitions, 7149 flow [2024-06-27 20:56:51,843 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 20:56:51,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:51,844 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 20:56:51,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:56:51,844 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 20:56:51,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:51,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1685409476, now seen corresponding path program 4 times [2024-06-27 20:56:51,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:51,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516875148] [2024-06-27 20:56:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:51,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:55,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:55,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516875148] [2024-06-27 20:56:55,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516875148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:55,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:55,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:55,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020266637] [2024-06-27 20:56:55,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:55,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:55,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:55,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:55,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:55,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:56:55,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 419 transitions, 7149 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 20:56:55,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:55,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:56:55,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:00,014 INFO L124 PetriNetUnfolderBase]: 7450/11884 cut-off events. [2024-06-27 20:57:00,014 INFO L125 PetriNetUnfolderBase]: For 1166276/1166278 co-relation queries the response was YES. [2024-06-27 20:57:00,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92778 conditions, 11884 events. 7450/11884 cut-off events. For 1166276/1166278 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 81112 event pairs, 2945 based on Foata normal form. 4/11887 useless extension candidates. Maximal degree in co-relation 92620. Up to 11096 conditions per place. [2024-06-27 20:57:00,183 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 349 selfloop transitions, 128 changer transitions 0/481 dead transitions. [2024-06-27 20:57:00,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 481 transitions, 8545 flow [2024-06-27 20:57:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:57:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:57:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 234 transitions. [2024-06-27 20:57:00,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-27 20:57:00,185 INFO L175 Difference]: Start difference. First operand has 326 places, 419 transitions, 7149 flow. Second operand 14 states and 234 transitions. [2024-06-27 20:57:00,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 481 transitions, 8545 flow [2024-06-27 20:57:03,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 481 transitions, 8374 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 20:57:03,147 INFO L231 Difference]: Finished difference. Result has 333 places, 419 transitions, 7240 flow [2024-06-27 20:57:03,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6978, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7240, PETRI_PLACES=333, PETRI_TRANSITIONS=419} [2024-06-27 20:57:03,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 20:57:03,148 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 419 transitions, 7240 flow [2024-06-27 20:57:03,148 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 20:57:03,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:03,148 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 20:57:03,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:57:03,149 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 20:57:03,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2075289358, now seen corresponding path program 5 times [2024-06-27 20:57:03,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:03,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245503918] [2024-06-27 20:57:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:03,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:06,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:06,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245503918] [2024-06-27 20:57:06,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245503918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:06,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:06,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:06,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474235569] [2024-06-27 20:57:06,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:06,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:06,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:06,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:06,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:57:06,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 419 transitions, 7240 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 20:57:06,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:06,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:57:06,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:10,646 INFO L124 PetriNetUnfolderBase]: 7622/12156 cut-off events. [2024-06-27 20:57:10,646 INFO L125 PetriNetUnfolderBase]: For 1228202/1228204 co-relation queries the response was YES. [2024-06-27 20:57:10,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96559 conditions, 12156 events. 7622/12156 cut-off events. For 1228202/1228204 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 83146 event pairs, 3093 based on Foata normal form. 8/12163 useless extension candidates. Maximal degree in co-relation 96400. Up to 11693 conditions per place. [2024-06-27 20:57:10,833 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 411 selfloop transitions, 72 changer transitions 1/488 dead transitions. [2024-06-27 20:57:10,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 488 transitions, 9152 flow [2024-06-27 20:57:10,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:57:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:57:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2024-06-27 20:57:10,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36813186813186816 [2024-06-27 20:57:10,837 INFO L175 Difference]: Start difference. First operand has 333 places, 419 transitions, 7240 flow. Second operand 13 states and 201 transitions. [2024-06-27 20:57:10,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 488 transitions, 9152 flow [2024-06-27 20:57:14,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 488 transitions, 8823 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-27 20:57:14,159 INFO L231 Difference]: Finished difference. Result has 336 places, 444 transitions, 7777 flow [2024-06-27 20:57:14,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6967, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7777, PETRI_PLACES=336, PETRI_TRANSITIONS=444} [2024-06-27 20:57:14,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-27 20:57:14,159 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 444 transitions, 7777 flow [2024-06-27 20:57:14,160 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 20:57:14,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:14,160 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 20:57:14,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:57:14,160 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 20:57:14,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2075300518, now seen corresponding path program 6 times [2024-06-27 20:57:14,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:14,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554547066] [2024-06-27 20:57:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:14,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:17,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:17,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554547066] [2024-06-27 20:57:17,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554547066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:17,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:17,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:17,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693990464] [2024-06-27 20:57:17,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:17,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:17,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:17,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:17,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:57:17,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 444 transitions, 7777 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 20:57:17,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:17,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:57:17,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:21,919 INFO L124 PetriNetUnfolderBase]: 7592/12116 cut-off events. [2024-06-27 20:57:21,920 INFO L125 PetriNetUnfolderBase]: For 1237926/1237928 co-relation queries the response was YES. [2024-06-27 20:57:22,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95894 conditions, 12116 events. 7592/12116 cut-off events. For 1237926/1237928 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 82896 event pairs, 3102 based on Foata normal form. 8/12123 useless extension candidates. Maximal degree in co-relation 95731. Up to 11674 conditions per place. [2024-06-27 20:57:22,095 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 406 selfloop transitions, 72 changer transitions 3/485 dead transitions. [2024-06-27 20:57:22,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 485 transitions, 8872 flow [2024-06-27 20:57:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:57:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:57:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-27 20:57:22,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 20:57:22,098 INFO L175 Difference]: Start difference. First operand has 336 places, 444 transitions, 7777 flow. Second operand 12 states and 188 transitions. [2024-06-27 20:57:22,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 485 transitions, 8872 flow [2024-06-27 20:57:25,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 485 transitions, 8786 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:25,518 INFO L231 Difference]: Finished difference. Result has 343 places, 444 transitions, 7853 flow [2024-06-27 20:57:25,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7691, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7853, PETRI_PLACES=343, PETRI_TRANSITIONS=444} [2024-06-27 20:57:25,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-27 20:57:25,519 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 444 transitions, 7853 flow [2024-06-27 20:57:25,519 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 20:57:25,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:25,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:25,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:57:25,520 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 20:57:25,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1027287184, now seen corresponding path program 7 times [2024-06-27 20:57:25,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:25,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784064321] [2024-06-27 20:57:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:25,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:30,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:30,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784064321] [2024-06-27 20:57:30,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784064321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:30,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:30,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:30,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775118633] [2024-06-27 20:57:30,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:30,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:30,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:30,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:30,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:57:30,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 444 transitions, 7853 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 20:57:30,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:30,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:57:30,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:34,254 INFO L124 PetriNetUnfolderBase]: 7903/12583 cut-off events. [2024-06-27 20:57:34,254 INFO L125 PetriNetUnfolderBase]: For 1323663/1323665 co-relation queries the response was YES. [2024-06-27 20:57:34,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101371 conditions, 12583 events. 7903/12583 cut-off events. For 1323663/1323665 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 86277 event pairs, 3041 based on Foata normal form. 8/12590 useless extension candidates. Maximal degree in co-relation 101205. Up to 11568 conditions per place. [2024-06-27 20:57:34,475 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 353 selfloop transitions, 170 changer transitions 1/528 dead transitions. [2024-06-27 20:57:34,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 528 transitions, 10380 flow [2024-06-27 20:57:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:57:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:57:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-27 20:57:34,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38293650793650796 [2024-06-27 20:57:34,477 INFO L175 Difference]: Start difference. First operand has 343 places, 444 transitions, 7853 flow. Second operand 12 states and 193 transitions. [2024-06-27 20:57:34,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 528 transitions, 10380 flow [2024-06-27 20:57:37,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 528 transitions, 10264 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:57:37,872 INFO L231 Difference]: Finished difference. Result has 349 places, 483 transitions, 9006 flow [2024-06-27 20:57:37,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9006, PETRI_PLACES=349, PETRI_TRANSITIONS=483} [2024-06-27 20:57:37,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-27 20:57:37,872 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 483 transitions, 9006 flow [2024-06-27 20:57:37,873 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 20:57:37,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:37,873 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 20:57:37,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:57:37,873 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 20:57:37,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1027050034, now seen corresponding path program 8 times [2024-06-27 20:57:37,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:37,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484017816] [2024-06-27 20:57:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:41,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:41,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484017816] [2024-06-27 20:57:41,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484017816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:41,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:41,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:41,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66797111] [2024-06-27 20:57:41,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:41,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:41,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:41,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:57:41,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 483 transitions, 9006 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 20:57:41,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:41,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:57:41,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:46,120 INFO L124 PetriNetUnfolderBase]: 8005/12731 cut-off events. [2024-06-27 20:57:46,121 INFO L125 PetriNetUnfolderBase]: For 1391624/1391626 co-relation queries the response was YES. [2024-06-27 20:57:46,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105208 conditions, 12731 events. 8005/12731 cut-off events. For 1391624/1391626 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 87302 event pairs, 3035 based on Foata normal form. 4/12734 useless extension candidates. Maximal degree in co-relation 105039. Up to 11640 conditions per place. [2024-06-27 20:57:46,338 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 347 selfloop transitions, 184 changer transitions 1/536 dead transitions. [2024-06-27 20:57:46,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 536 transitions, 10995 flow [2024-06-27 20:57:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:57:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:57:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-27 20:57:46,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-27 20:57:46,340 INFO L175 Difference]: Start difference. First operand has 349 places, 483 transitions, 9006 flow. Second operand 11 states and 180 transitions. [2024-06-27 20:57:46,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 536 transitions, 10995 flow [2024-06-27 20:57:50,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 536 transitions, 10721 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 20:57:50,730 INFO L231 Difference]: Finished difference. Result has 357 places, 497 transitions, 9497 flow [2024-06-27 20:57:50,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8742, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9497, PETRI_PLACES=357, PETRI_TRANSITIONS=497} [2024-06-27 20:57:50,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-27 20:57:50,731 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 497 transitions, 9497 flow [2024-06-27 20:57:50,731 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 20:57:50,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:50,731 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 20:57:50,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:57:50,731 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:50,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash 686710820, now seen corresponding path program 9 times [2024-06-27 20:57:50,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:50,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184673190] [2024-06-27 20:57:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:50,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:53,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:53,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184673190] [2024-06-27 20:57:53,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184673190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:53,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:53,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:53,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547428383] [2024-06-27 20:57:53,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:53,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:53,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:53,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:53,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:57:53,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 497 transitions, 9497 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 20:57:53,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:53,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:57:53,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:58,808 INFO L124 PetriNetUnfolderBase]: 7987/12679 cut-off events. [2024-06-27 20:57:58,808 INFO L125 PetriNetUnfolderBase]: For 1421672/1421674 co-relation queries the response was YES. [2024-06-27 20:57:58,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105844 conditions, 12679 events. 7987/12679 cut-off events. For 1421672/1421674 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 86549 event pairs, 3176 based on Foata normal form. 4/12682 useless extension candidates. Maximal degree in co-relation 105672. Up to 12285 conditions per place. [2024-06-27 20:57:58,991 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 456 selfloop transitions, 62 changer transitions 4/526 dead transitions. [2024-06-27 20:57:58,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 526 transitions, 10622 flow [2024-06-27 20:57:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:57:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:57:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-27 20:57:58,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-27 20:57:58,993 INFO L175 Difference]: Start difference. First operand has 357 places, 497 transitions, 9497 flow. Second operand 10 states and 152 transitions. [2024-06-27 20:57:58,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 526 transitions, 10622 flow [2024-06-27 20:58:03,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 526 transitions, 10332 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:58:03,374 INFO L231 Difference]: Finished difference. Result has 360 places, 494 transitions, 9266 flow [2024-06-27 20:58:03,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9207, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9266, PETRI_PLACES=360, PETRI_TRANSITIONS=494} [2024-06-27 20:58:03,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-27 20:58:03,375 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 494 transitions, 9266 flow [2024-06-27 20:58:03,375 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 20:58:03,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:03,375 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 20:58:03,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:58:03,376 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:03,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:03,376 INFO L85 PathProgramCache]: Analyzing trace with hash -413278670, now seen corresponding path program 10 times [2024-06-27 20:58:03,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:03,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905202338] [2024-06-27 20:58:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:03,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:06,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:06,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905202338] [2024-06-27 20:58:06,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905202338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:06,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:06,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:06,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387309395] [2024-06-27 20:58:06,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:06,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:06,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:06,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:58:06,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 494 transitions, 9266 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 20:58:06,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:06,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:58:06,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:12,187 INFO L124 PetriNetUnfolderBase]: 7945/12633 cut-off events. [2024-06-27 20:58:12,187 INFO L125 PetriNetUnfolderBase]: For 1443579/1443581 co-relation queries the response was YES. [2024-06-27 20:58:12,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104726 conditions, 12633 events. 7945/12633 cut-off events. For 1443579/1443581 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 86369 event pairs, 3151 based on Foata normal form. 8/12640 useless extension candidates. Maximal degree in co-relation 104553. Up to 12121 conditions per place. [2024-06-27 20:58:12,374 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 448 selfloop transitions, 75 changer transitions 1/528 dead transitions. [2024-06-27 20:58:12,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 528 transitions, 10571 flow [2024-06-27 20:58:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:58:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:58:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-27 20:58:12,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37445887445887444 [2024-06-27 20:58:12,375 INFO L175 Difference]: Start difference. First operand has 360 places, 494 transitions, 9266 flow. Second operand 11 states and 173 transitions. [2024-06-27 20:58:12,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 528 transitions, 10571 flow [2024-06-27 20:58:16,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 528 transitions, 10440 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:58:16,383 INFO L231 Difference]: Finished difference. Result has 364 places, 493 transitions, 9266 flow [2024-06-27 20:58:16,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9135, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9266, PETRI_PLACES=364, PETRI_TRANSITIONS=493} [2024-06-27 20:58:16,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-27 20:58:16,384 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 493 transitions, 9266 flow [2024-06-27 20:58:16,384 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 20:58:16,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:16,385 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 20:58:16,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:58:16,385 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:16,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:16,385 INFO L85 PathProgramCache]: Analyzing trace with hash -478343136, now seen corresponding path program 11 times [2024-06-27 20:58:16,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:16,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742132365] [2024-06-27 20:58:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:16,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:20,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:20,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742132365] [2024-06-27 20:58:20,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742132365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:20,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:20,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:20,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254427504] [2024-06-27 20:58:20,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:20,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:20,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:20,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:20,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:20,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:58:20,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 493 transitions, 9266 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 20:58:20,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:20,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:58:20,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:24,540 INFO L124 PetriNetUnfolderBase]: 7927/12631 cut-off events. [2024-06-27 20:58:24,541 INFO L125 PetriNetUnfolderBase]: For 1458133/1458135 co-relation queries the response was YES. [2024-06-27 20:58:24,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104912 conditions, 12631 events. 7927/12631 cut-off events. For 1458133/1458135 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 86640 event pairs, 3034 based on Foata normal form. 4/12634 useless extension candidates. Maximal degree in co-relation 104738. Up to 11591 conditions per place. [2024-06-27 20:58:24,731 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 340 selfloop transitions, 182 changer transitions 2/528 dead transitions. [2024-06-27 20:58:24,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 528 transitions, 10770 flow [2024-06-27 20:58:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:58:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:58:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 20:58:24,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:58:24,733 INFO L175 Difference]: Start difference. First operand has 364 places, 493 transitions, 9266 flow. Second operand 10 states and 165 transitions. [2024-06-27 20:58:24,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 528 transitions, 10770 flow [2024-06-27 20:58:28,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 528 transitions, 10602 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 20:58:28,841 INFO L231 Difference]: Finished difference. Result has 368 places, 494 transitions, 9521 flow [2024-06-27 20:58:28,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9098, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9521, PETRI_PLACES=368, PETRI_TRANSITIONS=494} [2024-06-27 20:58:28,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 20:58:28,842 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 494 transitions, 9521 flow [2024-06-27 20:58:28,842 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 20:58:28,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:28,842 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 20:58:28,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:58:28,842 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:28,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:28,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1023556954, now seen corresponding path program 12 times [2024-06-27 20:58:28,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:28,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318586949] [2024-06-27 20:58:28,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:28,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:32,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:32,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318586949] [2024-06-27 20:58:32,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318586949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:32,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:32,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:32,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30526997] [2024-06-27 20:58:32,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:32,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:32,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:32,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:32,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-27 20:58:32,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 494 transitions, 9521 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 20:58:32,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:32,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-27 20:58:32,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:37,388 INFO L124 PetriNetUnfolderBase]: 7877/12549 cut-off events. [2024-06-27 20:58:37,388 INFO L125 PetriNetUnfolderBase]: For 1488191/1488193 co-relation queries the response was YES. [2024-06-27 20:58:37,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104683 conditions, 12549 events. 7877/12549 cut-off events. For 1488191/1488193 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 85944 event pairs, 3147 based on Foata normal form. 8/12556 useless extension candidates. Maximal degree in co-relation 104508. Up to 12050 conditions per place. [2024-06-27 20:58:37,559 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 451 selfloop transitions, 75 changer transitions 2/532 dead transitions. [2024-06-27 20:58:37,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 532 transitions, 10661 flow [2024-06-27 20:58:37,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:58:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:58:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 198 transitions. [2024-06-27 20:58:37,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3626373626373626 [2024-06-27 20:58:37,561 INFO L175 Difference]: Start difference. First operand has 368 places, 494 transitions, 9521 flow. Second operand 13 states and 198 transitions. [2024-06-27 20:58:37,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 532 transitions, 10661 flow