./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe018_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/safe018_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe018_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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:00:23,278 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:00:23,343 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:00:23,351 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:00:23,352 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:00:23,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:00:23,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:00:23,377 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:00:23,377 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:00:23,380 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:00:23,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:00:23,381 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:00:23,382 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:00:23,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:00:23,383 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:00:23,383 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:00:23,383 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:00:23,383 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:00:23,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:00:23,384 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:00:23,385 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:00:23,385 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:00:23,385 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:00:23,385 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:00:23,385 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:00:23,386 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:00:23,386 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:00:23,386 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:00:23,387 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:00:23,387 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:00:23,387 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:00:23,388 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:00:23,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:00:23,388 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:00:23,388 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:00:23,388 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:00:23,388 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:00:23,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:00:23,389 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:00:23,389 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:00:23,389 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:00:23,389 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:00:23,389 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:00:23,390 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 19:00:23,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:00:23,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:00:23,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:00:23,627 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:00:23,627 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:00:23,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i [2024-06-27 19:00:24,684 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:00:24,921 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:00:24,924 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i [2024-06-27 19:00:24,940 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537c727f0/b4b23d57ea304b07a8b0f75a5b1a41b6/FLAGf9fe9a460 [2024-06-27 19:00:24,952 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537c727f0/b4b23d57ea304b07a8b0f75a5b1a41b6 [2024-06-27 19:00:24,954 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:00:24,955 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:00:24,956 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe018_power.oepc.yml/witness.yml [2024-06-27 19:00:25,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:00:25,158 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:00:25,159 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:00:25,159 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:00:25,163 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:00:25,163 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:00:24" (1/2) ... [2024-06-27 19:00:25,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3511635c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:00:25, skipping insertion in model container [2024-06-27 19:00:25,164 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:00:24" (1/2) ... [2024-06-27 19:00:25,165 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7465afa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:00:25, skipping insertion in model container [2024-06-27 19:00:25,165 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:00:25" (2/2) ... [2024-06-27 19:00:25,166 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3511635c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25, skipping insertion in model container [2024-06-27 19:00:25,166 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:00:25" (2/2) ... [2024-06-27 19:00:25,166 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:00:25,270 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:00:25,272 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)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$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 19:00:25,272 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 19:00:25,272 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)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$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 19:00:25,272 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:00:25,272 INFO L106 edCorrectnessWitness]: ghost_update [L833-L833] multithreaded = 1; [2024-06-27 19:00:25,302 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:00:25,458 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i[995,1008] [2024-06-27 19:00:25,587 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:00:25,614 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 19:00:25,650 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i[995,1008] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:00:25,823 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:00:25,867 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:00:25,867 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25 WrapperNode [2024-06-27 19:00:25,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:00:25,868 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:00:25,868 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:00:25,868 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:00:25,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:25,897 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:25,947 INFO L138 Inliner]: procedures = 175, calls = 67, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 170 [2024-06-27 19:00:25,947 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:00:25,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:00:25,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:00:25,948 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:00:25,960 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:25,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:25,964 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:25,979 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-27 19:00:25,979 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:25,979 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:25,988 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:25,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:25,991 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:26,006 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:26,009 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:00:26,010 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:00:26,010 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:00:26,010 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:00:26,011 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (1/1) ... [2024-06-27 19:00:26,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:00:26,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:00:26,031 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 19:00:26,047 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 19:00:26,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 19:00:26,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 19:00:26,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 19:00:26,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 19:00:26,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:00:26,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:00:26,082 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:00:26,082 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:00:26,082 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:00:26,083 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:00:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:00:26,083 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:00:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:00:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 19:00:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:00:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:00:26,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:00:26,085 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 19:00:26,230 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:00:26,231 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:00:26,564 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:00:26,564 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:00:26,863 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:00:26,863 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:00:26,864 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:00:26 BoogieIcfgContainer [2024-06-27 19:00:26,864 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:00:26,865 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:00:26,866 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:00:26,868 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:00:26,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:00:24" (1/4) ... [2024-06-27 19:00:26,869 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ddb861c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:00:26, skipping insertion in model container [2024-06-27 19:00:26,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:00:25" (2/4) ... [2024-06-27 19:00:26,869 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ddb861c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:00:26, skipping insertion in model container [2024-06-27 19:00:26,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:00:25" (3/4) ... [2024-06-27 19:00:26,869 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ddb861c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:00:26, skipping insertion in model container [2024-06-27 19:00:26,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:00:26" (4/4) ... [2024-06-27 19:00:26,870 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_power.oepc.i [2024-06-27 19:00:26,883 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:00:26,884 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 19:00:26,884 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:00:26,928 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:00:26,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 19:00:26,983 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-27 19:00:26,983 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:00:26,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-27 19:00:26,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 19:00:26,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-27 19:00:27,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:00:27,013 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;@e751c47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:00:27,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 19:00:27,021 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:00:27,021 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:00:27,021 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:00:27,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:27,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:00:27,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:27,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash 640932730, now seen corresponding path program 1 times [2024-06-27 19:00:27,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:27,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841417413] [2024-06-27 19:00:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:27,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:28,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841417413] [2024-06-27 19:00:28,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841417413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:28,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:28,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:00:28,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055626426] [2024-06-27 19:00:28,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:28,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:00:28,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:28,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:00:28,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:00:28,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 19:00:28,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:28,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:28,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 19:00:28,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:29,273 INFO L124 PetriNetUnfolderBase]: 1706/2758 cut-off events. [2024-06-27 19:00:29,274 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 19:00:29,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5329 conditions, 2758 events. 1706/2758 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15485 event pairs, 1011 based on Foata normal form. 0/2653 useless extension candidates. Maximal degree in co-relation 5317. Up to 2510 conditions per place. [2024-06-27 19:00:29,288 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-27 19:00:29,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 223 flow [2024-06-27 19:00:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:00:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:00:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-27 19:00:29,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 19:00:29,299 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 92 transitions. [2024-06-27 19:00:29,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 223 flow [2024-06-27 19:00:29,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 218 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:00:29,303 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 123 flow [2024-06-27 19:00:29,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-27 19:00:29,307 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 19:00:29,307 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 123 flow [2024-06-27 19:00:29,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:29,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:29,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:29,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:00:29,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:29,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1757019671, now seen corresponding path program 1 times [2024-06-27 19:00:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:29,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258810128] [2024-06-27 19:00:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:29,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:31,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:31,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258810128] [2024-06-27 19:00:31,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258810128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:31,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:31,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:00:31,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548984996] [2024-06-27 19:00:31,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:31,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:00:31,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:31,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:00:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:00:31,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 19:00:31,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:31,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:31,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 19:00:31,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:32,152 INFO L124 PetriNetUnfolderBase]: 1700/2638 cut-off events. [2024-06-27 19:00:32,152 INFO L125 PetriNetUnfolderBase]: For 498/508 co-relation queries the response was YES. [2024-06-27 19:00:32,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5945 conditions, 2638 events. 1700/2638 cut-off events. For 498/508 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14204 event pairs, 665 based on Foata normal form. 6/2640 useless extension candidates. Maximal degree in co-relation 5933. Up to 2468 conditions per place. [2024-06-27 19:00:32,165 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 59 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-27 19:00:32,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 351 flow [2024-06-27 19:00:32,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:00:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:00:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-27 19:00:32,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793478260869565 [2024-06-27 19:00:32,167 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 123 flow. Second operand 4 states and 125 transitions. [2024-06-27 19:00:32,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 351 flow [2024-06-27 19:00:32,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 79 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:00:32,169 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 186 flow [2024-06-27 19:00:32,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-27 19:00:32,170 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-06-27 19:00:32,170 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 186 flow [2024-06-27 19:00:32,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:32,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:32,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:32,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:00:32,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:32,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:32,172 INFO L85 PathProgramCache]: Analyzing trace with hash 607825675, now seen corresponding path program 1 times [2024-06-27 19:00:32,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:32,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196733128] [2024-06-27 19:00:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:32,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:34,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:34,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196733128] [2024-06-27 19:00:34,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196733128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:34,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:34,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:00:34,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812137824] [2024-06-27 19:00:34,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:34,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:00:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:00:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:00:34,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-06-27 19:00:34,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:34,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:34,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-06-27 19:00:34,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:36,025 INFO L124 PetriNetUnfolderBase]: 2164/3296 cut-off events. [2024-06-27 19:00:36,025 INFO L125 PetriNetUnfolderBase]: For 1910/1940 co-relation queries the response was YES. [2024-06-27 19:00:36,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8379 conditions, 3296 events. 2164/3296 cut-off events. For 1910/1940 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17576 event pairs, 489 based on Foata normal form. 15/3308 useless extension candidates. Maximal degree in co-relation 8364. Up to 3035 conditions per place. [2024-06-27 19:00:36,042 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 86 selfloop transitions, 15 changer transitions 0/110 dead transitions. [2024-06-27 19:00:36,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 110 transitions, 542 flow [2024-06-27 19:00:36,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:00:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:00:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 19:00:36,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-27 19:00:36,048 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 186 flow. Second operand 6 states and 179 transitions. [2024-06-27 19:00:36,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 110 transitions, 542 flow [2024-06-27 19:00:36,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 110 transitions, 542 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 19:00:36,056 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 256 flow [2024-06-27 19:00:36,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-27 19:00:36,058 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-06-27 19:00:36,058 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 256 flow [2024-06-27 19:00:36,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:36,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:36,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:36,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:00:36,059 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:36,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash 397202514, now seen corresponding path program 1 times [2024-06-27 19:00:36,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:36,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487193028] [2024-06-27 19:00:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:36,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:37,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:37,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487193028] [2024-06-27 19:00:37,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487193028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:37,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:37,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:00:37,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387889718] [2024-06-27 19:00:37,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:37,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:00:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:37,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:00:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:00:37,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:00:37,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 19:00:37,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:37,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:00:37,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:38,318 INFO L124 PetriNetUnfolderBase]: 2584/4076 cut-off events. [2024-06-27 19:00:38,318 INFO L125 PetriNetUnfolderBase]: For 3856/3856 co-relation queries the response was YES. [2024-06-27 19:00:38,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10995 conditions, 4076 events. 2584/4076 cut-off events. For 3856/3856 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22874 event pairs, 1004 based on Foata normal form. 2/4076 useless extension candidates. Maximal degree in co-relation 10975. Up to 3735 conditions per place. [2024-06-27 19:00:38,342 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 67 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-27 19:00:38,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 84 transitions, 500 flow [2024-06-27 19:00:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:00:38,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:00:38,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 19:00:38,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2024-06-27 19:00:38,344 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 256 flow. Second operand 5 states and 119 transitions. [2024-06-27 19:00:38,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 84 transitions, 500 flow [2024-06-27 19:00:38,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 467 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 19:00:38,349 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 311 flow [2024-06-27 19:00:38,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-27 19:00:38,351 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-06-27 19:00:38,351 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 311 flow [2024-06-27 19:00:38,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 19:00:38,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:38,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:38,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:00:38,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:38,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash 17611495, now seen corresponding path program 1 times [2024-06-27 19:00:38,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:38,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901216792] [2024-06-27 19:00:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:38,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:40,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:40,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901216792] [2024-06-27 19:00:40,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901216792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:40,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:40,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:00:40,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941121615] [2024-06-27 19:00:40,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:40,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:00:40,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:40,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:00:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:00:40,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:00:40,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 311 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:40,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:40,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:00:40,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:42,040 INFO L124 PetriNetUnfolderBase]: 2615/3933 cut-off events. [2024-06-27 19:00:42,040 INFO L125 PetriNetUnfolderBase]: For 4950/4950 co-relation queries the response was YES. [2024-06-27 19:00:42,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11729 conditions, 3933 events. 2615/3933 cut-off events. For 4950/4950 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21043 event pairs, 762 based on Foata normal form. 2/3931 useless extension candidates. Maximal degree in co-relation 11706. Up to 3693 conditions per place. [2024-06-27 19:00:42,071 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 91 selfloop transitions, 19 changer transitions 0/117 dead transitions. [2024-06-27 19:00:42,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 117 transitions, 718 flow [2024-06-27 19:00:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:00:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:00:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:00:42,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579710144927537 [2024-06-27 19:00:42,076 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 311 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:00:42,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 117 transitions, 718 flow [2024-06-27 19:00:42,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 117 transitions, 710 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 19:00:42,086 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 444 flow [2024-06-27 19:00:42,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=444, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-27 19:00:42,088 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2024-06-27 19:00:42,089 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 444 flow [2024-06-27 19:00:42,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:42,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:42,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:42,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:00:42,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:42,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:42,090 INFO L85 PathProgramCache]: Analyzing trace with hash 661642099, now seen corresponding path program 2 times [2024-06-27 19:00:42,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:42,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74005644] [2024-06-27 19:00:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:42,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:44,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:44,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74005644] [2024-06-27 19:00:44,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74005644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:44,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:44,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:00:44,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395351204] [2024-06-27 19:00:44,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:44,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:00:44,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:44,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:00:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:00:44,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:00:44,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 444 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:44,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:44,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:00:44,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:45,365 INFO L124 PetriNetUnfolderBase]: 2610/3936 cut-off events. [2024-06-27 19:00:45,366 INFO L125 PetriNetUnfolderBase]: For 7529/7538 co-relation queries the response was YES. [2024-06-27 19:00:45,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12953 conditions, 3936 events. 2610/3936 cut-off events. For 7529/7538 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21116 event pairs, 766 based on Foata normal form. 8/3940 useless extension candidates. Maximal degree in co-relation 12925. Up to 3688 conditions per place. [2024-06-27 19:00:45,386 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 86 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2024-06-27 19:00:45,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 773 flow [2024-06-27 19:00:45,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:00:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:00:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:00:45,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-06-27 19:00:45,388 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 444 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:00:45,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 773 flow [2024-06-27 19:00:45,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 114 transitions, 761 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 19:00:45,396 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 514 flow [2024-06-27 19:00:45,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-06-27 19:00:45,397 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 26 predicate places. [2024-06-27 19:00:45,397 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 514 flow [2024-06-27 19:00:45,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:45,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:45,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:45,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:00:45,398 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:45,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:45,398 INFO L85 PathProgramCache]: Analyzing trace with hash 623219645, now seen corresponding path program 1 times [2024-06-27 19:00:45,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:45,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859230571] [2024-06-27 19:00:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:45,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:46,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:46,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859230571] [2024-06-27 19:00:46,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859230571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:46,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:46,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:00:46,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96095468] [2024-06-27 19:00:46,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:46,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:00:46,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:46,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:00:46,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:00:46,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:00:46,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:46,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:46,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:00:46,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:48,013 INFO L124 PetriNetUnfolderBase]: 2602/4102 cut-off events. [2024-06-27 19:00:48,013 INFO L125 PetriNetUnfolderBase]: For 8138/8138 co-relation queries the response was YES. [2024-06-27 19:00:48,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13255 conditions, 4102 events. 2602/4102 cut-off events. For 8138/8138 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23008 event pairs, 882 based on Foata normal form. 4/4104 useless extension candidates. Maximal degree in co-relation 13223. Up to 3721 conditions per place. [2024-06-27 19:00:48,037 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 92 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2024-06-27 19:00:48,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 816 flow [2024-06-27 19:00:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:00:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:00:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:00:48,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181159420289855 [2024-06-27 19:00:48,040 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 514 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:00:48,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 816 flow [2024-06-27 19:00:48,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 112 transitions, 795 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:00:48,051 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 553 flow [2024-06-27 19:00:48,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=553, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2024-06-27 19:00:48,053 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 30 predicate places. [2024-06-27 19:00:48,053 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 553 flow [2024-06-27 19:00:48,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:48,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:48,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:48,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:00:48,054 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:48,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:48,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1164302980, now seen corresponding path program 1 times [2024-06-27 19:00:48,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:48,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329927356] [2024-06-27 19:00:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:48,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:50,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:50,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329927356] [2024-06-27 19:00:50,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329927356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:50,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:50,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:50,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961894528] [2024-06-27 19:00:50,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:50,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:50,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:50,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:50,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:50,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:00:50,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 553 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:50,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:50,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:00:50,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:51,642 INFO L124 PetriNetUnfolderBase]: 2656/4034 cut-off events. [2024-06-27 19:00:51,642 INFO L125 PetriNetUnfolderBase]: For 10399/10399 co-relation queries the response was YES. [2024-06-27 19:00:51,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13902 conditions, 4034 events. 2656/4034 cut-off events. For 10399/10399 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 22230 event pairs, 634 based on Foata normal form. 3/4035 useless extension candidates. Maximal degree in co-relation 13868. Up to 3689 conditions per place. [2024-06-27 19:00:51,666 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 109 selfloop transitions, 24 changer transitions 0/140 dead transitions. [2024-06-27 19:00:51,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 140 transitions, 991 flow [2024-06-27 19:00:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:51,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:00:51,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683229813664596 [2024-06-27 19:00:51,668 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 553 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:00:51,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 140 transitions, 991 flow [2024-06-27 19:00:51,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 140 transitions, 955 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:51,678 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 606 flow [2024-06-27 19:00:51,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=606, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-27 19:00:51,680 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2024-06-27 19:00:51,680 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 606 flow [2024-06-27 19:00:51,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:51,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:51,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:51,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:00:51,681 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:51,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:51,681 INFO L85 PathProgramCache]: Analyzing trace with hash 249571964, now seen corresponding path program 2 times [2024-06-27 19:00:51,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:51,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632340783] [2024-06-27 19:00:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:51,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:54,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:54,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632340783] [2024-06-27 19:00:54,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632340783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:54,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:54,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:54,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770423175] [2024-06-27 19:00:54,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:54,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:54,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:54,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:54,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:00:54,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 606 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:54,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:54,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:00:54,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:55,584 INFO L124 PetriNetUnfolderBase]: 2687/4063 cut-off events. [2024-06-27 19:00:55,584 INFO L125 PetriNetUnfolderBase]: For 12338/12338 co-relation queries the response was YES. [2024-06-27 19:00:55,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15013 conditions, 4063 events. 2687/4063 cut-off events. For 12338/12338 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21963 event pairs, 694 based on Foata normal form. 2/4061 useless extension candidates. Maximal degree in co-relation 14978. Up to 3691 conditions per place. [2024-06-27 19:00:55,639 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 110 selfloop transitions, 30 changer transitions 0/147 dead transitions. [2024-06-27 19:00:55,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 147 transitions, 1133 flow [2024-06-27 19:00:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:00:55,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562111801242236 [2024-06-27 19:00:55,641 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 606 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:00:55,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 147 transitions, 1133 flow [2024-06-27 19:00:55,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 147 transitions, 1071 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:00:55,653 INFO L231 Difference]: Finished difference. Result has 87 places, 94 transitions, 726 flow [2024-06-27 19:00:55,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=726, PETRI_PLACES=87, PETRI_TRANSITIONS=94} [2024-06-27 19:00:55,654 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 37 predicate places. [2024-06-27 19:00:55,654 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 94 transitions, 726 flow [2024-06-27 19:00:55,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:55,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:55,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:55,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:00:55,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:55,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:55,655 INFO L85 PathProgramCache]: Analyzing trace with hash -931755550, now seen corresponding path program 3 times [2024-06-27 19:00:55,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:55,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800388766] [2024-06-27 19:00:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:55,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:57,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:57,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800388766] [2024-06-27 19:00:57,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800388766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:57,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:57,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:57,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420348314] [2024-06-27 19:00:57,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:57,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:57,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:58,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:00:58,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 94 transitions, 726 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:58,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:58,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:00:58,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:59,484 INFO L124 PetriNetUnfolderBase]: 2682/4057 cut-off events. [2024-06-27 19:00:59,484 INFO L125 PetriNetUnfolderBase]: For 15440/15440 co-relation queries the response was YES. [2024-06-27 19:00:59,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15891 conditions, 4057 events. 2682/4057 cut-off events. For 15440/15440 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21852 event pairs, 709 based on Foata normal form. 2/4052 useless extension candidates. Maximal degree in co-relation 15853. Up to 3686 conditions per place. [2024-06-27 19:00:59,541 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 105 selfloop transitions, 31 changer transitions 0/143 dead transitions. [2024-06-27 19:00:59,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 143 transitions, 1139 flow [2024-06-27 19:00:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:59,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:00:59,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-27 19:00:59,544 INFO L175 Difference]: Start difference. First operand has 87 places, 94 transitions, 726 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:00:59,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 143 transitions, 1139 flow [2024-06-27 19:00:59,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 143 transitions, 1106 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 19:00:59,564 INFO L231 Difference]: Finished difference. Result has 92 places, 95 transitions, 774 flow [2024-06-27 19:00:59,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=774, PETRI_PLACES=92, PETRI_TRANSITIONS=95} [2024-06-27 19:00:59,566 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-06-27 19:00:59,566 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 95 transitions, 774 flow [2024-06-27 19:00:59,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:59,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:59,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:59,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:00:59,567 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:59,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:59,567 INFO L85 PathProgramCache]: Analyzing trace with hash -620724002, now seen corresponding path program 1 times [2024-06-27 19:00:59,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:59,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604303260] [2024-06-27 19:00:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:59,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:01,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:01,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604303260] [2024-06-27 19:01:01,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604303260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:01,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:01,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:01,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677866213] [2024-06-27 19:01:01,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:01,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:01,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:01,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:01,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 95 transitions, 774 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:01,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:01,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:01,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:02,898 INFO L124 PetriNetUnfolderBase]: 2850/4316 cut-off events. [2024-06-27 19:01:02,899 INFO L125 PetriNetUnfolderBase]: For 18170/18170 co-relation queries the response was YES. [2024-06-27 19:01:02,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17541 conditions, 4316 events. 2850/4316 cut-off events. For 18170/18170 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23299 event pairs, 692 based on Foata normal form. 4/4316 useless extension candidates. Maximal degree in co-relation 17501. Up to 3924 conditions per place. [2024-06-27 19:01:02,922 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 130 selfloop transitions, 37 changer transitions 0/174 dead transitions. [2024-06-27 19:01:02,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 174 transitions, 1441 flow [2024-06-27 19:01:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:01:02,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570652173913043 [2024-06-27 19:01:02,924 INFO L175 Difference]: Start difference. First operand has 92 places, 95 transitions, 774 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:01:02,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 174 transitions, 1441 flow [2024-06-27 19:01:02,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 174 transitions, 1372 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:01:02,940 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 994 flow [2024-06-27 19:01:02,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=994, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2024-06-27 19:01:02,941 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 48 predicate places. [2024-06-27 19:01:02,941 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 994 flow [2024-06-27 19:01:02,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:02,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:02,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:02,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:01:02,942 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:02,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:02,942 INFO L85 PathProgramCache]: Analyzing trace with hash -853196144, now seen corresponding path program 2 times [2024-06-27 19:01:02,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:02,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060695833] [2024-06-27 19:01:02,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:02,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:05,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:05,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060695833] [2024-06-27 19:01:05,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060695833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:05,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:05,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:05,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794845261] [2024-06-27 19:01:05,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:05,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:05,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:05,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:05,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 994 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:05,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:05,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:05,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:06,712 INFO L124 PetriNetUnfolderBase]: 2900/4390 cut-off events. [2024-06-27 19:01:06,740 INFO L125 PetriNetUnfolderBase]: For 21372/21372 co-relation queries the response was YES. [2024-06-27 19:01:06,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18636 conditions, 4390 events. 2900/4390 cut-off events. For 21372/21372 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 23833 event pairs, 680 based on Foata normal form. 4/4390 useless extension candidates. Maximal degree in co-relation 18592. Up to 3942 conditions per place. [2024-06-27 19:01:06,764 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 123 selfloop transitions, 37 changer transitions 0/167 dead transitions. [2024-06-27 19:01:06,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 167 transitions, 1496 flow [2024-06-27 19:01:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:01:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:01:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:01:06,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-06-27 19:01:06,783 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 994 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:01:06,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 167 transitions, 1496 flow [2024-06-27 19:01:06,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 1446 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:01:06,806 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 1053 flow [2024-06-27 19:01:06,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2024-06-27 19:01:06,807 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2024-06-27 19:01:06,807 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 1053 flow [2024-06-27 19:01:06,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:06,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:06,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:06,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:01:06,808 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:06,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash 182953906, now seen corresponding path program 3 times [2024-06-27 19:01:06,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:06,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206731448] [2024-06-27 19:01:06,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:06,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:09,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:09,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206731448] [2024-06-27 19:01:09,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206731448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:09,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:09,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:09,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51335435] [2024-06-27 19:01:09,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:09,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:09,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:09,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:09,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:09,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:09,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 1053 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:09,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:09,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:09,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:10,991 INFO L124 PetriNetUnfolderBase]: 2950/4478 cut-off events. [2024-06-27 19:01:10,991 INFO L125 PetriNetUnfolderBase]: For 25530/25539 co-relation queries the response was YES. [2024-06-27 19:01:11,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19517 conditions, 4478 events. 2950/4478 cut-off events. For 25530/25539 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24404 event pairs, 701 based on Foata normal form. 10/4482 useless extension candidates. Maximal degree in co-relation 19472. Up to 4062 conditions per place. [2024-06-27 19:01:11,016 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 126 selfloop transitions, 35 changer transitions 0/168 dead transitions. [2024-06-27 19:01:11,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 168 transitions, 1569 flow [2024-06-27 19:01:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:01:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:01:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:01:11,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372670807453416 [2024-06-27 19:01:11,028 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 1053 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:01:11,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 168 transitions, 1569 flow [2024-06-27 19:01:11,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 168 transitions, 1480 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:11,087 INFO L231 Difference]: Finished difference. Result has 104 places, 116 transitions, 1070 flow [2024-06-27 19:01:11,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1070, PETRI_PLACES=104, PETRI_TRANSITIONS=116} [2024-06-27 19:01:11,088 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2024-06-27 19:01:11,088 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 116 transitions, 1070 flow [2024-06-27 19:01:11,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:11,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:11,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:11,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:01:11,089 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:11,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash 350532240, now seen corresponding path program 4 times [2024-06-27 19:01:11,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:11,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860254093] [2024-06-27 19:01:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:11,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:13,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:13,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860254093] [2024-06-27 19:01:13,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860254093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:13,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:13,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:13,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252701949] [2024-06-27 19:01:13,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:13,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:13,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:13,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:13,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:13,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:13,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 116 transitions, 1070 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:13,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:13,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:13,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:14,448 INFO L124 PetriNetUnfolderBase]: 2942/4466 cut-off events. [2024-06-27 19:01:14,448 INFO L125 PetriNetUnfolderBase]: For 24951/24960 co-relation queries the response was YES. [2024-06-27 19:01:14,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19312 conditions, 4466 events. 2942/4466 cut-off events. For 24951/24960 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24330 event pairs, 597 based on Foata normal form. 10/4470 useless extension candidates. Maximal degree in co-relation 19266. Up to 3844 conditions per place. [2024-06-27 19:01:14,473 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 122 selfloop transitions, 43 changer transitions 0/172 dead transitions. [2024-06-27 19:01:14,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 172 transitions, 1614 flow [2024-06-27 19:01:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:01:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:01:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:01:14,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2024-06-27 19:01:14,475 INFO L175 Difference]: Start difference. First operand has 104 places, 116 transitions, 1070 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:01:14,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 172 transitions, 1614 flow [2024-06-27 19:01:14,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 172 transitions, 1534 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:14,500 INFO L231 Difference]: Finished difference. Result has 107 places, 120 transitions, 1157 flow [2024-06-27 19:01:14,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1157, PETRI_PLACES=107, PETRI_TRANSITIONS=120} [2024-06-27 19:01:14,501 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 57 predicate places. [2024-06-27 19:01:14,501 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 120 transitions, 1157 flow [2024-06-27 19:01:14,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:14,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:14,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:14,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:01:14,502 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:14,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash 871378097, now seen corresponding path program 1 times [2024-06-27 19:01:14,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:14,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651501357] [2024-06-27 19:01:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:14,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:17,212 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 19:01:17,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:17,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651501357] [2024-06-27 19:01:17,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651501357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:17,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:17,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:17,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217634611] [2024-06-27 19:01:17,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:17,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:17,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:17,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:17,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:17,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:17,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 120 transitions, 1157 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:17,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:17,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:17,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:18,961 INFO L124 PetriNetUnfolderBase]: 3562/5426 cut-off events. [2024-06-27 19:01:18,961 INFO L125 PetriNetUnfolderBase]: For 36513/36513 co-relation queries the response was YES. [2024-06-27 19:01:18,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24329 conditions, 5426 events. 3562/5426 cut-off events. For 36513/36513 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30745 event pairs, 511 based on Foata normal form. 18/5442 useless extension candidates. Maximal degree in co-relation 24281. Up to 4186 conditions per place. [2024-06-27 19:01:18,989 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 170 selfloop transitions, 36 changer transitions 0/213 dead transitions. [2024-06-27 19:01:18,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 213 transitions, 1965 flow [2024-06-27 19:01:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:01:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:01:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 19:01:18,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821256038647343 [2024-06-27 19:01:18,991 INFO L175 Difference]: Start difference. First operand has 107 places, 120 transitions, 1157 flow. Second operand 9 states and 241 transitions. [2024-06-27 19:01:18,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 213 transitions, 1965 flow [2024-06-27 19:01:19,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 213 transitions, 1901 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 19:01:19,058 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1254 flow [2024-06-27 19:01:19,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1254, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-27 19:01:19,060 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 64 predicate places. [2024-06-27 19:01:19,060 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1254 flow [2024-06-27 19:01:19,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:19,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:19,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:19,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:01:19,061 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:19,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash -797547237, now seen corresponding path program 2 times [2024-06-27 19:01:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:19,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027487557] [2024-06-27 19:01:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:19,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:21,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027487557] [2024-06-27 19:01:21,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027487557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:21,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:21,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660212154] [2024-06-27 19:01:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:21,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:21,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:21,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:21,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1254 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:21,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:21,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:21,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:23,597 INFO L124 PetriNetUnfolderBase]: 3516/5356 cut-off events. [2024-06-27 19:01:23,597 INFO L125 PetriNetUnfolderBase]: For 37650/37650 co-relation queries the response was YES. [2024-06-27 19:01:23,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24698 conditions, 5356 events. 3516/5356 cut-off events. For 37650/37650 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 30187 event pairs, 758 based on Foata normal form. 24/5378 useless extension candidates. Maximal degree in co-relation 24647. Up to 4550 conditions per place. [2024-06-27 19:01:23,630 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 159 selfloop transitions, 32 changer transitions 0/198 dead transitions. [2024-06-27 19:01:23,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 198 transitions, 1883 flow [2024-06-27 19:01:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 19:01:23,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733695652173914 [2024-06-27 19:01:23,632 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1254 flow. Second operand 8 states and 211 transitions. [2024-06-27 19:01:23,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 198 transitions, 1883 flow [2024-06-27 19:01:23,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 198 transitions, 1819 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:23,690 INFO L231 Difference]: Finished difference. Result has 117 places, 127 transitions, 1285 flow [2024-06-27 19:01:23,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1285, PETRI_PLACES=117, PETRI_TRANSITIONS=127} [2024-06-27 19:01:23,691 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 67 predicate places. [2024-06-27 19:01:23,692 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 127 transitions, 1285 flow [2024-06-27 19:01:23,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:23,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:23,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:23,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:01:23,700 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:23,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:23,701 INFO L85 PathProgramCache]: Analyzing trace with hash -941072795, now seen corresponding path program 3 times [2024-06-27 19:01:23,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:23,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651448112] [2024-06-27 19:01:23,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:23,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:26,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:26,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651448112] [2024-06-27 19:01:26,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651448112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:26,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:26,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:26,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537262410] [2024-06-27 19:01:26,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:26,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:26,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:26,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:26,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:26,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:26,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 127 transitions, 1285 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:26,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:26,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:26,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:28,437 INFO L124 PetriNetUnfolderBase]: 3692/5638 cut-off events. [2024-06-27 19:01:28,437 INFO L125 PetriNetUnfolderBase]: For 39048/39048 co-relation queries the response was YES. [2024-06-27 19:01:28,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25985 conditions, 5638 events. 3692/5638 cut-off events. For 39048/39048 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 32375 event pairs, 802 based on Foata normal form. 16/5650 useless extension candidates. Maximal degree in co-relation 25932. Up to 4870 conditions per place. [2024-06-27 19:01:28,479 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 147 selfloop transitions, 42 changer transitions 0/196 dead transitions. [2024-06-27 19:01:28,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 196 transitions, 1901 flow [2024-06-27 19:01:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:01:28,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2024-06-27 19:01:28,481 INFO L175 Difference]: Start difference. First operand has 117 places, 127 transitions, 1285 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:01:28,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 196 transitions, 1901 flow [2024-06-27 19:01:28,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 196 transitions, 1841 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:01:28,534 INFO L231 Difference]: Finished difference. Result has 119 places, 128 transitions, 1336 flow [2024-06-27 19:01:28,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1336, PETRI_PLACES=119, PETRI_TRANSITIONS=128} [2024-06-27 19:01:28,535 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-06-27 19:01:28,535 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 128 transitions, 1336 flow [2024-06-27 19:01:28,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:28,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:28,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:28,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:01:28,536 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:28,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:28,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1369736719, now seen corresponding path program 1 times [2024-06-27 19:01:28,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:28,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103757088] [2024-06-27 19:01:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:28,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:31,667 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 19:01:31,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:31,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103757088] [2024-06-27 19:01:31,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103757088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:31,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:31,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:31,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865653541] [2024-06-27 19:01:31,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:31,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:31,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:31,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:31,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:31,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:31,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 128 transitions, 1336 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:31,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:31,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:31,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:33,395 INFO L124 PetriNetUnfolderBase]: 3818/5836 cut-off events. [2024-06-27 19:01:33,395 INFO L125 PetriNetUnfolderBase]: For 43851/43851 co-relation queries the response was YES. [2024-06-27 19:01:33,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27207 conditions, 5836 events. 3818/5836 cut-off events. For 43851/43851 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 33759 event pairs, 774 based on Foata normal form. 12/5844 useless extension candidates. Maximal degree in co-relation 27153. Up to 4536 conditions per place. [2024-06-27 19:01:33,434 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 148 selfloop transitions, 45 changer transitions 0/200 dead transitions. [2024-06-27 19:01:33,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 200 transitions, 1974 flow [2024-06-27 19:01:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 19:01:33,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-06-27 19:01:33,436 INFO L175 Difference]: Start difference. First operand has 119 places, 128 transitions, 1336 flow. Second operand 8 states and 208 transitions. [2024-06-27 19:01:33,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 200 transitions, 1974 flow [2024-06-27 19:01:33,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 200 transitions, 1885 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:01:33,500 INFO L231 Difference]: Finished difference. Result has 121 places, 129 transitions, 1366 flow [2024-06-27 19:01:33,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=121, PETRI_TRANSITIONS=129} [2024-06-27 19:01:33,500 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-06-27 19:01:33,500 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 129 transitions, 1366 flow [2024-06-27 19:01:33,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:33,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:33,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:33,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:01:33,501 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:33,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:33,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1376420921, now seen corresponding path program 4 times [2024-06-27 19:01:33,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:33,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900247597] [2024-06-27 19:01:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:33,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:36,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900247597] [2024-06-27 19:01:36,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900247597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:36,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:36,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:36,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600709885] [2024-06-27 19:01:36,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:36,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:36,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:36,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:36,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:36,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:36,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 129 transitions, 1366 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:36,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:36,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:36,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:38,169 INFO L124 PetriNetUnfolderBase]: 3936/6058 cut-off events. [2024-06-27 19:01:38,169 INFO L125 PetriNetUnfolderBase]: For 48568/48568 co-relation queries the response was YES. [2024-06-27 19:01:38,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28263 conditions, 6058 events. 3936/6058 cut-off events. For 48568/48568 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 35481 event pairs, 886 based on Foata normal form. 16/6065 useless extension candidates. Maximal degree in co-relation 28208. Up to 5254 conditions per place. [2024-06-27 19:01:38,214 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 148 selfloop transitions, 41 changer transitions 0/196 dead transitions. [2024-06-27 19:01:38,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 196 transitions, 1990 flow [2024-06-27 19:01:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:01:38,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489130434782609 [2024-06-27 19:01:38,216 INFO L175 Difference]: Start difference. First operand has 121 places, 129 transitions, 1366 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:01:38,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 196 transitions, 1990 flow [2024-06-27 19:01:38,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 196 transitions, 1904 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:38,281 INFO L231 Difference]: Finished difference. Result has 124 places, 130 transitions, 1393 flow [2024-06-27 19:01:38,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1393, PETRI_PLACES=124, PETRI_TRANSITIONS=130} [2024-06-27 19:01:38,282 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 74 predicate places. [2024-06-27 19:01:38,282 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 130 transitions, 1393 flow [2024-06-27 19:01:38,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:38,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:38,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:38,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:01:38,283 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:38,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:38,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2026675077, now seen corresponding path program 2 times [2024-06-27 19:01:38,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:38,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016117303] [2024-06-27 19:01:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:38,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:40,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:40,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016117303] [2024-06-27 19:01:40,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016117303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:40,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:40,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:40,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592208292] [2024-06-27 19:01:40,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:40,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:40,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:40,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:40,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:40,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:40,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 130 transitions, 1393 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:40,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:40,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:40,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:42,530 INFO L124 PetriNetUnfolderBase]: 4062/6276 cut-off events. [2024-06-27 19:01:42,530 INFO L125 PetriNetUnfolderBase]: For 51941/51941 co-relation queries the response was YES. [2024-06-27 19:01:42,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29215 conditions, 6276 events. 4062/6276 cut-off events. For 51941/51941 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 37064 event pairs, 886 based on Foata normal form. 12/6279 useless extension candidates. Maximal degree in co-relation 29159. Up to 5222 conditions per place. [2024-06-27 19:01:42,587 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 152 selfloop transitions, 42 changer transitions 0/201 dead transitions. [2024-06-27 19:01:42,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 201 transitions, 2045 flow [2024-06-27 19:01:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:01:42,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570652173913043 [2024-06-27 19:01:42,589 INFO L175 Difference]: Start difference. First operand has 124 places, 130 transitions, 1393 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:01:42,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 201 transitions, 2045 flow [2024-06-27 19:01:42,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 201 transitions, 1954 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:01:42,669 INFO L231 Difference]: Finished difference. Result has 126 places, 131 transitions, 1418 flow [2024-06-27 19:01:42,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1418, PETRI_PLACES=126, PETRI_TRANSITIONS=131} [2024-06-27 19:01:42,670 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-06-27 19:01:42,670 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 131 transitions, 1418 flow [2024-06-27 19:01:42,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:42,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:42,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:42,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:01:42,671 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:42,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:42,671 INFO L85 PathProgramCache]: Analyzing trace with hash -805667023, now seen corresponding path program 3 times [2024-06-27 19:01:42,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:42,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110661958] [2024-06-27 19:01:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:42,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:45,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:45,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110661958] [2024-06-27 19:01:45,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110661958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:45,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:45,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:45,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592852888] [2024-06-27 19:01:45,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:45,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:45,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:45,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:45,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:45,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 1418 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:45,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:45,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:45,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:46,686 INFO L124 PetriNetUnfolderBase]: 4042/6236 cut-off events. [2024-06-27 19:01:46,686 INFO L125 PetriNetUnfolderBase]: For 50261/50261 co-relation queries the response was YES. [2024-06-27 19:01:46,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28747 conditions, 6236 events. 4042/6236 cut-off events. For 50261/50261 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 36673 event pairs, 713 based on Foata normal form. 12/6239 useless extension candidates. Maximal degree in co-relation 28690. Up to 4148 conditions per place. [2024-06-27 19:01:46,738 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 141 selfloop transitions, 51 changer transitions 0/199 dead transitions. [2024-06-27 19:01:46,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 199 transitions, 1992 flow [2024-06-27 19:01:46,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:01:46,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-06-27 19:01:46,740 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 1418 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:01:46,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 199 transitions, 1992 flow [2024-06-27 19:01:46,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 199 transitions, 1894 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:01:46,813 INFO L231 Difference]: Finished difference. Result has 127 places, 130 transitions, 1386 flow [2024-06-27 19:01:46,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1386, PETRI_PLACES=127, PETRI_TRANSITIONS=130} [2024-06-27 19:01:46,813 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 77 predicate places. [2024-06-27 19:01:46,813 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 130 transitions, 1386 flow [2024-06-27 19:01:46,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:46,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:46,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:46,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:01:46,814 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:46,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash 364569859, now seen corresponding path program 1 times [2024-06-27 19:01:46,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:46,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341326161] [2024-06-27 19:01:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:46,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:48,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:48,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341326161] [2024-06-27 19:01:48,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341326161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:48,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:48,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:01:48,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050726786] [2024-06-27 19:01:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:48,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:01:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:48,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:01:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:01:48,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-27 19:01:48,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 130 transitions, 1386 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:48,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:48,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-27 19:01:48,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:49,498 INFO L124 PetriNetUnfolderBase]: 3709/6093 cut-off events. [2024-06-27 19:01:49,498 INFO L125 PetriNetUnfolderBase]: For 47704/47718 co-relation queries the response was YES. [2024-06-27 19:01:49,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26855 conditions, 6093 events. 3709/6093 cut-off events. For 47704/47718 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 38852 event pairs, 1153 based on Foata normal form. 12/6048 useless extension candidates. Maximal degree in co-relation 26797. Up to 5420 conditions per place. [2024-06-27 19:01:49,544 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 120 selfloop transitions, 13 changer transitions 0/153 dead transitions. [2024-06-27 19:01:49,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 153 transitions, 1734 flow [2024-06-27 19:01:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:01:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:01:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 19:01:49,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2024-06-27 19:01:49,546 INFO L175 Difference]: Start difference. First operand has 127 places, 130 transitions, 1386 flow. Second operand 5 states and 119 transitions. [2024-06-27 19:01:49,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 153 transitions, 1734 flow [2024-06-27 19:01:49,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 153 transitions, 1587 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:01:49,599 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1312 flow [2024-06-27 19:01:49,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1312, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2024-06-27 19:01:49,600 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 75 predicate places. [2024-06-27 19:01:49,600 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1312 flow [2024-06-27 19:01:49,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:49,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:49,600 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 19:01:49,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:01:49,601 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:49,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:49,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1588003570, now seen corresponding path program 1 times [2024-06-27 19:01:49,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:49,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590145144] [2024-06-27 19:01:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:49,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:51,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:51,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590145144] [2024-06-27 19:01:51,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590145144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:51,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:51,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:01:51,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702743116] [2024-06-27 19:01:51,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:51,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:01:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:51,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:01:51,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:01:51,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:51,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 1312 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:51,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:51,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:51,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:52,538 INFO L124 PetriNetUnfolderBase]: 4054/6546 cut-off events. [2024-06-27 19:01:52,538 INFO L125 PetriNetUnfolderBase]: For 46980/46980 co-relation queries the response was YES. [2024-06-27 19:01:52,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28566 conditions, 6546 events. 4054/6546 cut-off events. For 46980/46980 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 40818 event pairs, 1206 based on Foata normal form. 1/6544 useless extension candidates. Maximal degree in co-relation 28508. Up to 5917 conditions per place. [2024-06-27 19:01:52,588 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 142 selfloop transitions, 21 changer transitions 0/170 dead transitions. [2024-06-27 19:01:52,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 170 transitions, 1850 flow [2024-06-27 19:01:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:01:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:01:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 19:01:52,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2024-06-27 19:01:52,590 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1312 flow. Second operand 6 states and 140 transitions. [2024-06-27 19:01:52,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 170 transitions, 1850 flow [2024-06-27 19:01:52,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 170 transitions, 1805 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:01:52,650 INFO L231 Difference]: Finished difference. Result has 128 places, 142 transitions, 1420 flow [2024-06-27 19:01:52,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1420, PETRI_PLACES=128, PETRI_TRANSITIONS=142} [2024-06-27 19:01:52,651 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 78 predicate places. [2024-06-27 19:01:52,651 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 142 transitions, 1420 flow [2024-06-27 19:01:52,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:52,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:52,652 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 19:01:52,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:01:52,652 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:52,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:52,652 INFO L85 PathProgramCache]: Analyzing trace with hash -295377040, now seen corresponding path program 2 times [2024-06-27 19:01:52,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:52,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352857696] [2024-06-27 19:01:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:52,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:54,155 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 19:01:54,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:54,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352857696] [2024-06-27 19:01:54,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352857696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:54,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:54,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:01:54,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320344645] [2024-06-27 19:01:54,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:54,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:01:54,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:54,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:01:54,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:01:54,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:01:54,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 142 transitions, 1420 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:54,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:54,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:01:54,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:55,522 INFO L124 PetriNetUnfolderBase]: 4051/6542 cut-off events. [2024-06-27 19:01:55,522 INFO L125 PetriNetUnfolderBase]: For 51779/51779 co-relation queries the response was YES. [2024-06-27 19:01:55,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29364 conditions, 6542 events. 4051/6542 cut-off events. For 51779/51779 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 40883 event pairs, 1206 based on Foata normal form. 1/6540 useless extension candidates. Maximal degree in co-relation 29305. Up to 5925 conditions per place. [2024-06-27 19:01:55,564 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 140 selfloop transitions, 17 changer transitions 0/164 dead transitions. [2024-06-27 19:01:55,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 164 transitions, 1794 flow [2024-06-27 19:01:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:01:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:01:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 19:01:55,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2024-06-27 19:01:55,567 INFO L175 Difference]: Start difference. First operand has 128 places, 142 transitions, 1420 flow. Second operand 5 states and 119 transitions. [2024-06-27 19:01:55,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 164 transitions, 1794 flow [2024-06-27 19:01:55,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 164 transitions, 1716 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 19:01:55,627 INFO L231 Difference]: Finished difference. Result has 131 places, 142 transitions, 1388 flow [2024-06-27 19:01:55,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1388, PETRI_PLACES=131, PETRI_TRANSITIONS=142} [2024-06-27 19:01:55,627 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 81 predicate places. [2024-06-27 19:01:55,627 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 142 transitions, 1388 flow [2024-06-27 19:01:55,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:55,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:55,628 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 19:01:55,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:01:55,628 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:55,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2134182052, now seen corresponding path program 1 times [2024-06-27 19:01:55,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:55,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595073068] [2024-06-27 19:01:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:55,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:57,835 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 19:01:57,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:57,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595073068] [2024-06-27 19:01:57,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595073068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:57,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:57,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:57,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854115446] [2024-06-27 19:01:57,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:57,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:57,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:57,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:57,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-27 19:01:57,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 142 transitions, 1388 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:57,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:57,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-27 19:01:57,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:59,457 INFO L124 PetriNetUnfolderBase]: 3939/6205 cut-off events. [2024-06-27 19:01:59,458 INFO L125 PetriNetUnfolderBase]: For 53196/53204 co-relation queries the response was YES. [2024-06-27 19:01:59,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28574 conditions, 6205 events. 3939/6205 cut-off events. For 53196/53204 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 37937 event pairs, 881 based on Foata normal form. 10/6149 useless extension candidates. Maximal degree in co-relation 28513. Up to 5477 conditions per place. [2024-06-27 19:01:59,503 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 151 selfloop transitions, 37 changer transitions 0/208 dead transitions. [2024-06-27 19:01:59,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 208 transitions, 2088 flow [2024-06-27 19:01:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:01:59,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2024-06-27 19:01:59,512 INFO L175 Difference]: Start difference. First operand has 131 places, 142 transitions, 1388 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:01:59,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 208 transitions, 2088 flow [2024-06-27 19:01:59,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 208 transitions, 2054 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:01:59,577 INFO L231 Difference]: Finished difference. Result has 136 places, 155 transitions, 1570 flow [2024-06-27 19:01:59,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1570, PETRI_PLACES=136, PETRI_TRANSITIONS=155} [2024-06-27 19:01:59,581 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 86 predicate places. [2024-06-27 19:01:59,581 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 155 transitions, 1570 flow [2024-06-27 19:01:59,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:59,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:59,582 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 19:01:59,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:01:59,582 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:59,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:59,582 INFO L85 PathProgramCache]: Analyzing trace with hash -566936958, now seen corresponding path program 2 times [2024-06-27 19:01:59,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:59,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778933861] [2024-06-27 19:01:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:59,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:01,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:01,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778933861] [2024-06-27 19:02:01,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778933861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:01,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:01,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:01,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588473425] [2024-06-27 19:02:01,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:01,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:01,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:01,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:01,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:01,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-27 19:02:01,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 155 transitions, 1570 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:01,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:01,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-27 19:02:01,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:03,025 INFO L124 PetriNetUnfolderBase]: 3925/6191 cut-off events. [2024-06-27 19:02:03,026 INFO L125 PetriNetUnfolderBase]: For 58912/58920 co-relation queries the response was YES. [2024-06-27 19:02:03,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29892 conditions, 6191 events. 3925/6191 cut-off events. For 58912/58920 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 37949 event pairs, 883 based on Foata normal form. 10/6135 useless extension candidates. Maximal degree in co-relation 29829. Up to 5469 conditions per place. [2024-06-27 19:02:03,073 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 139 selfloop transitions, 34 changer transitions 0/193 dead transitions. [2024-06-27 19:02:03,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 193 transitions, 2036 flow [2024-06-27 19:02:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:02:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:02:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:02:03,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2024-06-27 19:02:03,075 INFO L175 Difference]: Start difference. First operand has 136 places, 155 transitions, 1570 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:02:03,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 193 transitions, 2036 flow [2024-06-27 19:02:03,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 193 transitions, 1967 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 19:02:03,154 INFO L231 Difference]: Finished difference. Result has 140 places, 155 transitions, 1583 flow [2024-06-27 19:02:03,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1583, PETRI_PLACES=140, PETRI_TRANSITIONS=155} [2024-06-27 19:02:03,155 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 90 predicate places. [2024-06-27 19:02:03,156 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 155 transitions, 1583 flow [2024-06-27 19:02:03,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:03,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:03,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:03,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:02:03,156 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:03,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:03,157 INFO L85 PathProgramCache]: Analyzing trace with hash -566551008, now seen corresponding path program 3 times [2024-06-27 19:02:03,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:03,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638223482] [2024-06-27 19:02:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:03,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:05,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:05,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638223482] [2024-06-27 19:02:05,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638223482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:05,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:05,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:05,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887332578] [2024-06-27 19:02:05,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:05,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:05,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:05,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-27 19:02:05,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 155 transitions, 1583 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:05,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:05,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-27 19:02:05,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:06,880 INFO L124 PetriNetUnfolderBase]: 3920/6183 cut-off events. [2024-06-27 19:02:06,880 INFO L125 PetriNetUnfolderBase]: For 60910/60918 co-relation queries the response was YES. [2024-06-27 19:02:06,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29872 conditions, 6183 events. 3920/6183 cut-off events. For 60910/60918 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 37938 event pairs, 899 based on Foata normal form. 8/6122 useless extension candidates. Maximal degree in co-relation 29807. Up to 5387 conditions per place. [2024-06-27 19:02:06,928 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 136 selfloop transitions, 38 changer transitions 0/194 dead transitions. [2024-06-27 19:02:06,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 194 transitions, 2119 flow [2024-06-27 19:02:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:02:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:02:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:02:06,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289855072463768 [2024-06-27 19:02:06,930 INFO L175 Difference]: Start difference. First operand has 140 places, 155 transitions, 1583 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:02:06,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 194 transitions, 2119 flow [2024-06-27 19:02:06,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 194 transitions, 2051 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:07,000 INFO L231 Difference]: Finished difference. Result has 142 places, 162 transitions, 1699 flow [2024-06-27 19:02:07,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1699, PETRI_PLACES=142, PETRI_TRANSITIONS=162} [2024-06-27 19:02:07,000 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 92 predicate places. [2024-06-27 19:02:07,000 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 162 transitions, 1699 flow [2024-06-27 19:02:07,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:07,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:07,001 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 19:02:07,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:02:07,001 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:07,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:07,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1983469212, now seen corresponding path program 1 times [2024-06-27 19:02:07,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:07,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910547071] [2024-06-27 19:02:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:07,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:08,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:08,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910547071] [2024-06-27 19:02:08,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910547071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:08,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:08,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:08,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776448043] [2024-06-27 19:02:08,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:08,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:08,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:08,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:08,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 162 transitions, 1699 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:08,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:08,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:08,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:10,594 INFO L124 PetriNetUnfolderBase]: 4325/6890 cut-off events. [2024-06-27 19:02:10,594 INFO L125 PetriNetUnfolderBase]: For 70471/70471 co-relation queries the response was YES. [2024-06-27 19:02:10,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33911 conditions, 6890 events. 4325/6890 cut-off events. For 70471/70471 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 42744 event pairs, 1216 based on Foata normal form. 2/6889 useless extension candidates. Maximal degree in co-relation 33844. Up to 6203 conditions per place. [2024-06-27 19:02:10,652 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 168 selfloop transitions, 31 changer transitions 0/206 dead transitions. [2024-06-27 19:02:10,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 206 transitions, 2353 flow [2024-06-27 19:02:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:02:10,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124223602484472 [2024-06-27 19:02:10,654 INFO L175 Difference]: Start difference. First operand has 142 places, 162 transitions, 1699 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:02:10,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 206 transitions, 2353 flow [2024-06-27 19:02:10,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 206 transitions, 2278 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 19:02:10,761 INFO L231 Difference]: Finished difference. Result has 147 places, 170 transitions, 1813 flow [2024-06-27 19:02:10,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1813, PETRI_PLACES=147, PETRI_TRANSITIONS=170} [2024-06-27 19:02:10,765 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 97 predicate places. [2024-06-27 19:02:10,765 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 170 transitions, 1813 flow [2024-06-27 19:02:10,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:10,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:10,772 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 19:02:10,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:02:10,773 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:10,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:10,773 INFO L85 PathProgramCache]: Analyzing trace with hash -566752446, now seen corresponding path program 2 times [2024-06-27 19:02:10,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:10,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225011477] [2024-06-27 19:02:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:10,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:12,561 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 19:02:12,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:12,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225011477] [2024-06-27 19:02:12,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225011477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:12,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:12,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681256637] [2024-06-27 19:02:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:12,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:12,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:12,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:12,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 170 transitions, 1813 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:12,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:12,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:12,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:14,160 INFO L124 PetriNetUnfolderBase]: 4361/6954 cut-off events. [2024-06-27 19:02:14,160 INFO L125 PetriNetUnfolderBase]: For 73606/73606 co-relation queries the response was YES. [2024-06-27 19:02:14,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34513 conditions, 6954 events. 4361/6954 cut-off events. For 73606/73606 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 43230 event pairs, 1216 based on Foata normal form. 2/6953 useless extension candidates. Maximal degree in co-relation 34444. Up to 6268 conditions per place. [2024-06-27 19:02:14,210 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 170 selfloop transitions, 28 changer transitions 0/205 dead transitions. [2024-06-27 19:02:14,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 205 transitions, 2405 flow [2024-06-27 19:02:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:02:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:02:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:02:14,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253623188405797 [2024-06-27 19:02:14,212 INFO L175 Difference]: Start difference. First operand has 147 places, 170 transitions, 1813 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:02:14,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 205 transitions, 2405 flow [2024-06-27 19:02:14,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 205 transitions, 2321 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 19:02:14,319 INFO L231 Difference]: Finished difference. Result has 150 places, 174 transitions, 1854 flow [2024-06-27 19:02:14,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1739, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1854, PETRI_PLACES=150, PETRI_TRANSITIONS=174} [2024-06-27 19:02:14,321 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-06-27 19:02:14,321 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 174 transitions, 1854 flow [2024-06-27 19:02:14,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:14,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:14,321 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 19:02:14,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:02:14,321 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:14,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:14,322 INFO L85 PathProgramCache]: Analyzing trace with hash -566545056, now seen corresponding path program 3 times [2024-06-27 19:02:14,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:14,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220579319] [2024-06-27 19:02:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:14,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:16,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:16,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220579319] [2024-06-27 19:02:16,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220579319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:16,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:16,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:16,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874391873] [2024-06-27 19:02:16,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:16,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:16,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:16,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:16,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 174 transitions, 1854 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:16,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:16,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:16,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:17,645 INFO L124 PetriNetUnfolderBase]: 4355/6946 cut-off events. [2024-06-27 19:02:17,645 INFO L125 PetriNetUnfolderBase]: For 74346/74346 co-relation queries the response was YES. [2024-06-27 19:02:17,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34420 conditions, 6946 events. 4355/6946 cut-off events. For 74346/74346 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 43113 event pairs, 1206 based on Foata normal form. 2/6945 useless extension candidates. Maximal degree in co-relation 34349. Up to 6263 conditions per place. [2024-06-27 19:02:17,701 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 178 selfloop transitions, 29 changer transitions 0/214 dead transitions. [2024-06-27 19:02:17,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 214 transitions, 2370 flow [2024-06-27 19:02:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:02:17,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945652173913043 [2024-06-27 19:02:17,703 INFO L175 Difference]: Start difference. First operand has 150 places, 174 transitions, 1854 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:02:17,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 214 transitions, 2370 flow [2024-06-27 19:02:17,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 214 transitions, 2262 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 19:02:17,808 INFO L231 Difference]: Finished difference. Result has 154 places, 174 transitions, 1811 flow [2024-06-27 19:02:17,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1811, PETRI_PLACES=154, PETRI_TRANSITIONS=174} [2024-06-27 19:02:17,808 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 104 predicate places. [2024-06-27 19:02:17,808 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 174 transitions, 1811 flow [2024-06-27 19:02:17,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:17,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:17,809 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 19:02:17,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:02:17,809 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:17,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:17,809 INFO L85 PathProgramCache]: Analyzing trace with hash -566537120, now seen corresponding path program 1 times [2024-06-27 19:02:17,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:17,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034849287] [2024-06-27 19:02:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:17,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034849287] [2024-06-27 19:02:20,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034849287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:20,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:20,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:20,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532225491] [2024-06-27 19:02:20,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:20,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:20,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:20,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:20,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:20,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-27 19:02:20,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 174 transitions, 1811 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:20,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:20,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-27 19:02:20,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:21,587 INFO L124 PetriNetUnfolderBase]: 3959/6434 cut-off events. [2024-06-27 19:02:21,588 INFO L125 PetriNetUnfolderBase]: For 71883/71899 co-relation queries the response was YES. [2024-06-27 19:02:21,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31734 conditions, 6434 events. 3959/6434 cut-off events. For 71883/71899 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 40820 event pairs, 1143 based on Foata normal form. 12/6386 useless extension candidates. Maximal degree in co-relation 31662. Up to 5726 conditions per place. [2024-06-27 19:02:21,639 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 166 selfloop transitions, 16 changer transitions 0/202 dead transitions. [2024-06-27 19:02:21,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 202 transitions, 2291 flow [2024-06-27 19:02:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:02:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:02:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 19:02:21,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2024-06-27 19:02:21,640 INFO L175 Difference]: Start difference. First operand has 154 places, 174 transitions, 1811 flow. Second operand 6 states and 140 transitions. [2024-06-27 19:02:21,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 202 transitions, 2291 flow [2024-06-27 19:02:21,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 202 transitions, 2205 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:02:21,741 INFO L231 Difference]: Finished difference. Result has 153 places, 177 transitions, 1821 flow [2024-06-27 19:02:21,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1821, PETRI_PLACES=153, PETRI_TRANSITIONS=177} [2024-06-27 19:02:21,742 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-06-27 19:02:21,742 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 177 transitions, 1821 flow [2024-06-27 19:02:21,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:21,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:21,742 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 19:02:21,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:02:21,743 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:21,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:21,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1046215545, now seen corresponding path program 1 times [2024-06-27 19:02:21,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:21,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504609734] [2024-06-27 19:02:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:21,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:24,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:24,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504609734] [2024-06-27 19:02:24,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504609734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:24,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:24,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:24,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991448946] [2024-06-27 19:02:24,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:24,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:24,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:24,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:24,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:24,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:24,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 177 transitions, 1821 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:24,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:24,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:24,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:26,305 INFO L124 PetriNetUnfolderBase]: 4399/6785 cut-off events. [2024-06-27 19:02:26,305 INFO L125 PetriNetUnfolderBase]: For 79997/79997 co-relation queries the response was YES. [2024-06-27 19:02:26,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34821 conditions, 6785 events. 4399/6785 cut-off events. For 79997/79997 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 40567 event pairs, 922 based on Foata normal form. 1/6782 useless extension candidates. Maximal degree in co-relation 34748. Up to 6104 conditions per place. [2024-06-27 19:02:26,355 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 180 selfloop transitions, 52 changer transitions 0/239 dead transitions. [2024-06-27 19:02:26,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 239 transitions, 2765 flow [2024-06-27 19:02:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:02:26,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546583850931677 [2024-06-27 19:02:26,357 INFO L175 Difference]: Start difference. First operand has 153 places, 177 transitions, 1821 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:02:26,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 239 transitions, 2765 flow [2024-06-27 19:02:26,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 239 transitions, 2691 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:02:26,480 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 2059 flow [2024-06-27 19:02:26,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2059, PETRI_PLACES=157, PETRI_TRANSITIONS=189} [2024-06-27 19:02:26,481 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-06-27 19:02:26,481 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 2059 flow [2024-06-27 19:02:26,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:26,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:26,481 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 19:02:26,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:02:26,482 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:26,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:26,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1735128461, now seen corresponding path program 2 times [2024-06-27 19:02:26,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:26,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270013330] [2024-06-27 19:02:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:26,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:29,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:29,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270013330] [2024-06-27 19:02:29,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270013330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:29,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:29,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998670291] [2024-06-27 19:02:29,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:29,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:29,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:29,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:29,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:29,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 189 transitions, 2059 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:29,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:29,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:29,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:31,090 INFO L124 PetriNetUnfolderBase]: 4445/6905 cut-off events. [2024-06-27 19:02:31,091 INFO L125 PetriNetUnfolderBase]: For 87711/87711 co-relation queries the response was YES. [2024-06-27 19:02:31,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36360 conditions, 6905 events. 4445/6905 cut-off events. For 87711/87711 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 41582 event pairs, 939 based on Foata normal form. 1/6904 useless extension candidates. Maximal degree in co-relation 36285. Up to 6285 conditions per place. [2024-06-27 19:02:31,146 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 199 selfloop transitions, 35 changer transitions 0/241 dead transitions. [2024-06-27 19:02:31,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 241 transitions, 2787 flow [2024-06-27 19:02:31,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:02:31,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5279503105590062 [2024-06-27 19:02:31,148 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 2059 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:02:31,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 241 transitions, 2787 flow [2024-06-27 19:02:31,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 241 transitions, 2729 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-27 19:02:31,280 INFO L231 Difference]: Finished difference. Result has 163 places, 195 transitions, 2168 flow [2024-06-27 19:02:31,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2168, PETRI_PLACES=163, PETRI_TRANSITIONS=195} [2024-06-27 19:02:31,280 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 113 predicate places. [2024-06-27 19:02:31,280 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 195 transitions, 2168 flow [2024-06-27 19:02:31,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:31,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:31,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:31,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:02:31,281 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:31,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:31,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1368490611, now seen corresponding path program 3 times [2024-06-27 19:02:31,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:31,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408451626] [2024-06-27 19:02:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:31,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:33,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:33,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408451626] [2024-06-27 19:02:33,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408451626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:33,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:33,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:33,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646752414] [2024-06-27 19:02:33,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:33,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:33,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:33,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:33,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:33,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:33,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 195 transitions, 2168 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:33,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:33,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:33,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:35,622 INFO L124 PetriNetUnfolderBase]: 4468/6940 cut-off events. [2024-06-27 19:02:35,623 INFO L125 PetriNetUnfolderBase]: For 91085/91094 co-relation queries the response was YES. [2024-06-27 19:02:35,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36564 conditions, 6940 events. 4468/6940 cut-off events. For 91085/91094 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 41860 event pairs, 951 based on Foata normal form. 7/6941 useless extension candidates. Maximal degree in co-relation 36486. Up to 6183 conditions per place. [2024-06-27 19:02:35,692 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 183 selfloop transitions, 57 changer transitions 0/247 dead transitions. [2024-06-27 19:02:35,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 247 transitions, 3030 flow [2024-06-27 19:02:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:02:35,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2024-06-27 19:02:35,694 INFO L175 Difference]: Start difference. First operand has 163 places, 195 transitions, 2168 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:02:35,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 247 transitions, 3030 flow [2024-06-27 19:02:35,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 247 transitions, 2966 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:02:35,852 INFO L231 Difference]: Finished difference. Result has 166 places, 198 transitions, 2271 flow [2024-06-27 19:02:35,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2271, PETRI_PLACES=166, PETRI_TRANSITIONS=198} [2024-06-27 19:02:35,852 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2024-06-27 19:02:35,853 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 198 transitions, 2271 flow [2024-06-27 19:02:35,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:35,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:35,853 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 19:02:35,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:02:35,853 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:35,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:35,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1016454705, now seen corresponding path program 4 times [2024-06-27 19:02:35,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:35,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915933178] [2024-06-27 19:02:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:35,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:37,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:37,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915933178] [2024-06-27 19:02:37,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915933178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:37,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:37,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:37,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102351088] [2024-06-27 19:02:37,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:37,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:37,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:37,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:37,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:38,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:38,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 198 transitions, 2271 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:38,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:38,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:38,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:39,927 INFO L124 PetriNetUnfolderBase]: 4496/6982 cut-off events. [2024-06-27 19:02:39,927 INFO L125 PetriNetUnfolderBase]: For 95506/95515 co-relation queries the response was YES. [2024-06-27 19:02:39,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37158 conditions, 6982 events. 4496/6982 cut-off events. For 95506/95515 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 42191 event pairs, 951 based on Foata normal form. 7/6983 useless extension candidates. Maximal degree in co-relation 37079. Up to 6211 conditions per place. [2024-06-27 19:02:39,990 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 176 selfloop transitions, 64 changer transitions 0/247 dead transitions. [2024-06-27 19:02:39,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 247 transitions, 3106 flow [2024-06-27 19:02:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:02:39,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186335403726708 [2024-06-27 19:02:39,992 INFO L175 Difference]: Start difference. First operand has 166 places, 198 transitions, 2271 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:02:39,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 247 transitions, 3106 flow [2024-06-27 19:02:40,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 247 transitions, 2949 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:40,156 INFO L231 Difference]: Finished difference. Result has 169 places, 204 transitions, 2373 flow [2024-06-27 19:02:40,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2373, PETRI_PLACES=169, PETRI_TRANSITIONS=204} [2024-06-27 19:02:40,156 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 119 predicate places. [2024-06-27 19:02:40,157 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 204 transitions, 2373 flow [2024-06-27 19:02:40,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:40,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:40,157 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 19:02:40,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:02:40,157 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:40,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:40,158 INFO L85 PathProgramCache]: Analyzing trace with hash -395182225, now seen corresponding path program 5 times [2024-06-27 19:02:40,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:40,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99958796] [2024-06-27 19:02:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:40,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:42,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:42,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99958796] [2024-06-27 19:02:42,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99958796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:42,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:42,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418134277] [2024-06-27 19:02:42,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:42,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:42,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 204 transitions, 2373 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:42,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:42,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:42,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:44,708 INFO L124 PetriNetUnfolderBase]: 4493/6983 cut-off events. [2024-06-27 19:02:44,708 INFO L125 PetriNetUnfolderBase]: For 96424/96424 co-relation queries the response was YES. [2024-06-27 19:02:44,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37085 conditions, 6983 events. 4493/6983 cut-off events. For 96424/96424 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 42237 event pairs, 922 based on Foata normal form. 1/6982 useless extension candidates. Maximal degree in co-relation 37005. Up to 6156 conditions per place. [2024-06-27 19:02:44,775 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 191 selfloop transitions, 71 changer transitions 0/269 dead transitions. [2024-06-27 19:02:44,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 269 transitions, 3201 flow [2024-06-27 19:02:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:44,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:02:44,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2024-06-27 19:02:44,777 INFO L175 Difference]: Start difference. First operand has 169 places, 204 transitions, 2373 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:02:44,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 269 transitions, 3201 flow [2024-06-27 19:02:44,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 269 transitions, 3097 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 19:02:44,959 INFO L231 Difference]: Finished difference. Result has 174 places, 204 transitions, 2444 flow [2024-06-27 19:02:44,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2444, PETRI_PLACES=174, PETRI_TRANSITIONS=204} [2024-06-27 19:02:44,959 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 124 predicate places. [2024-06-27 19:02:44,959 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 204 transitions, 2444 flow [2024-06-27 19:02:44,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:44,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:44,960 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 19:02:44,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:02:44,960 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:44,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1687845925, now seen corresponding path program 6 times [2024-06-27 19:02:44,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:44,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078616675] [2024-06-27 19:02:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:44,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:47,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:47,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078616675] [2024-06-27 19:02:47,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078616675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:47,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:47,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:47,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495385660] [2024-06-27 19:02:47,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:47,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:47,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:47,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:47,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:47,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:47,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 204 transitions, 2444 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:47,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:47,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:47,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:49,037 INFO L124 PetriNetUnfolderBase]: 4490/6970 cut-off events. [2024-06-27 19:02:49,037 INFO L125 PetriNetUnfolderBase]: For 101862/101862 co-relation queries the response was YES. [2024-06-27 19:02:49,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37350 conditions, 6970 events. 4490/6970 cut-off events. For 101862/101862 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 42139 event pairs, 965 based on Foata normal form. 1/6962 useless extension candidates. Maximal degree in co-relation 37269. Up to 6153 conditions per place. [2024-06-27 19:02:49,110 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 170 selfloop transitions, 67 changer transitions 0/244 dead transitions. [2024-06-27 19:02:49,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 244 transitions, 3088 flow [2024-06-27 19:02:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:02:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:02:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:02:49,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471014492753623 [2024-06-27 19:02:49,112 INFO L175 Difference]: Start difference. First operand has 174 places, 204 transitions, 2444 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:02:49,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 244 transitions, 3088 flow [2024-06-27 19:02:49,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 244 transitions, 2863 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 19:02:49,279 INFO L231 Difference]: Finished difference. Result has 171 places, 204 transitions, 2368 flow [2024-06-27 19:02:49,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2368, PETRI_PLACES=171, PETRI_TRANSITIONS=204} [2024-06-27 19:02:49,279 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 121 predicate places. [2024-06-27 19:02:49,279 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 204 transitions, 2368 flow [2024-06-27 19:02:49,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:49,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:49,280 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 19:02:49,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:02:49,280 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:49,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:49,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1360864115, now seen corresponding path program 1 times [2024-06-27 19:02:49,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:49,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461488843] [2024-06-27 19:02:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:49,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:51,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:51,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461488843] [2024-06-27 19:02:51,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461488843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:51,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:51,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:51,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403659885] [2024-06-27 19:02:51,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:51,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:51,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:51,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:51,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:51,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:51,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 204 transitions, 2368 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:51,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:51,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:51,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:52,743 INFO L124 PetriNetUnfolderBase]: 4520/7191 cut-off events. [2024-06-27 19:02:52,743 INFO L125 PetriNetUnfolderBase]: For 99246/99246 co-relation queries the response was YES. [2024-06-27 19:02:52,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37557 conditions, 7191 events. 4520/7191 cut-off events. For 99246/99246 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 44804 event pairs, 1136 based on Foata normal form. 2/7190 useless extension candidates. Maximal degree in co-relation 37477. Up to 6451 conditions per place. [2024-06-27 19:02:52,834 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 213 selfloop transitions, 29 changer transitions 0/249 dead transitions. [2024-06-27 19:02:52,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 249 transitions, 3142 flow [2024-06-27 19:02:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:02:52,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124223602484472 [2024-06-27 19:02:52,836 INFO L175 Difference]: Start difference. First operand has 171 places, 204 transitions, 2368 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:02:52,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 249 transitions, 3142 flow [2024-06-27 19:02:53,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 249 transitions, 2996 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:53,011 INFO L231 Difference]: Finished difference. Result has 172 places, 210 transitions, 2414 flow [2024-06-27 19:02:53,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2224, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2414, PETRI_PLACES=172, PETRI_TRANSITIONS=210} [2024-06-27 19:02:53,012 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 122 predicate places. [2024-06-27 19:02:53,012 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 210 transitions, 2414 flow [2024-06-27 19:02:53,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:53,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:53,012 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 19:02:53,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:02:53,013 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:53,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:53,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1016446769, now seen corresponding path program 2 times [2024-06-27 19:02:53,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:53,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008050782] [2024-06-27 19:02:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:53,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:54,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:54,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008050782] [2024-06-27 19:02:54,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008050782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:54,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:54,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:54,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489363513] [2024-06-27 19:02:54,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:54,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:54,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:54,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:54,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:54,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:54,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 210 transitions, 2414 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:54,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:54,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:54,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:56,663 INFO L124 PetriNetUnfolderBase]: 4550/7244 cut-off events. [2024-06-27 19:02:56,663 INFO L125 PetriNetUnfolderBase]: For 101250/101250 co-relation queries the response was YES. [2024-06-27 19:02:56,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37942 conditions, 7244 events. 4550/7244 cut-off events. For 101250/101250 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 45319 event pairs, 1230 based on Foata normal form. 2/7243 useless extension candidates. Maximal degree in co-relation 37862. Up to 6568 conditions per place. [2024-06-27 19:02:56,754 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 215 selfloop transitions, 24 changer transitions 0/246 dead transitions. [2024-06-27 19:02:56,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 246 transitions, 3044 flow [2024-06-27 19:02:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 19:02:56,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937888198757764 [2024-06-27 19:02:56,756 INFO L175 Difference]: Start difference. First operand has 172 places, 210 transitions, 2414 flow. Second operand 7 states and 159 transitions. [2024-06-27 19:02:56,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 246 transitions, 3044 flow [2024-06-27 19:02:56,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 246 transitions, 2919 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-27 19:02:56,917 INFO L231 Difference]: Finished difference. Result has 176 places, 213 transitions, 2415 flow [2024-06-27 19:02:56,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2415, PETRI_PLACES=176, PETRI_TRANSITIONS=213} [2024-06-27 19:02:56,918 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 126 predicate places. [2024-06-27 19:02:56,918 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 213 transitions, 2415 flow [2024-06-27 19:02:56,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:56,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:56,918 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 19:02:56,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:02:56,919 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:56,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash -389460369, now seen corresponding path program 3 times [2024-06-27 19:02:56,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:56,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191045263] [2024-06-27 19:02:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:56,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:58,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:58,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191045263] [2024-06-27 19:02:58,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191045263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:58,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:58,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:58,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259014143] [2024-06-27 19:02:58,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:58,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:58,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:58,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:02:58,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 213 transitions, 2415 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:58,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:58,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:02:58,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:00,313 INFO L124 PetriNetUnfolderBase]: 4545/7226 cut-off events. [2024-06-27 19:03:00,313 INFO L125 PetriNetUnfolderBase]: For 101510/101510 co-relation queries the response was YES. [2024-06-27 19:03:00,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37601 conditions, 7226 events. 4545/7226 cut-off events. For 101510/101510 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 45029 event pairs, 1135 based on Foata normal form. 2/7225 useless extension candidates. Maximal degree in co-relation 37519. Up to 6534 conditions per place. [2024-06-27 19:03:00,386 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 215 selfloop transitions, 23 changer transitions 0/245 dead transitions. [2024-06-27 19:03:00,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 245 transitions, 2977 flow [2024-06-27 19:03:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:03:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:03:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:03:00,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-27 19:03:00,388 INFO L175 Difference]: Start difference. First operand has 176 places, 213 transitions, 2415 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:03:00,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 245 transitions, 2977 flow [2024-06-27 19:03:00,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 245 transitions, 2879 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:00,552 INFO L231 Difference]: Finished difference. Result has 177 places, 213 transitions, 2373 flow [2024-06-27 19:03:00,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2373, PETRI_PLACES=177, PETRI_TRANSITIONS=213} [2024-06-27 19:03:00,553 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 127 predicate places. [2024-06-27 19:03:00,553 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 213 transitions, 2373 flow [2024-06-27 19:03:00,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:00,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:00,553 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 19:03:00,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:03:00,554 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:00,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:00,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2097028580, now seen corresponding path program 1 times [2024-06-27 19:03:00,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:00,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045403311] [2024-06-27 19:03:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:00,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:03,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:03,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045403311] [2024-06-27 19:03:03,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045403311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:03,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:03,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:03,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255187146] [2024-06-27 19:03:03,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:03,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:03,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:03,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:03:03,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 213 transitions, 2373 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:03,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:03,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:03:03,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:05,371 INFO L124 PetriNetUnfolderBase]: 4568/7082 cut-off events. [2024-06-27 19:03:05,372 INFO L125 PetriNetUnfolderBase]: For 102046/102046 co-relation queries the response was YES. [2024-06-27 19:03:05,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37600 conditions, 7082 events. 4568/7082 cut-off events. For 102046/102046 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 42783 event pairs, 929 based on Foata normal form. 1/7081 useless extension candidates. Maximal degree in co-relation 37517. Up to 6416 conditions per place. [2024-06-27 19:03:05,452 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 231 selfloop transitions, 41 changer transitions 0/279 dead transitions. [2024-06-27 19:03:05,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 279 transitions, 3211 flow [2024-06-27 19:03:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:05,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:03:05,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489130434782609 [2024-06-27 19:03:05,459 INFO L175 Difference]: Start difference. First operand has 177 places, 213 transitions, 2373 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:03:05,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 279 transitions, 3211 flow [2024-06-27 19:03:05,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 279 transitions, 3155 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:05,638 INFO L231 Difference]: Finished difference. Result has 180 places, 216 transitions, 2455 flow [2024-06-27 19:03:05,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2455, PETRI_PLACES=180, PETRI_TRANSITIONS=216} [2024-06-27 19:03:05,639 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-06-27 19:03:05,639 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 216 transitions, 2455 flow [2024-06-27 19:03:05,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:05,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:05,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:05,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:03:05,640 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:05,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:05,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2101497230, now seen corresponding path program 2 times [2024-06-27 19:03:05,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:05,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445238807] [2024-06-27 19:03:05,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:05,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:08,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:08,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445238807] [2024-06-27 19:03:08,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445238807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:08,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:08,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:08,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880332432] [2024-06-27 19:03:08,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:08,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:08,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:08,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:08,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:08,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:03:08,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 216 transitions, 2455 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:08,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:08,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:03:08,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:11,104 INFO L124 PetriNetUnfolderBase]: 4617/7122 cut-off events. [2024-06-27 19:03:11,105 INFO L125 PetriNetUnfolderBase]: For 111913/111913 co-relation queries the response was YES. [2024-06-27 19:03:11,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39134 conditions, 7122 events. 4617/7122 cut-off events. For 111913/111913 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 42793 event pairs, 924 based on Foata normal form. 1/7119 useless extension candidates. Maximal degree in co-relation 39050. Up to 6063 conditions per place. [2024-06-27 19:03:11,178 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 194 selfloop transitions, 86 changer transitions 0/287 dead transitions. [2024-06-27 19:03:11,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 287 transitions, 3559 flow [2024-06-27 19:03:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:03:11,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-06-27 19:03:11,181 INFO L175 Difference]: Start difference. First operand has 180 places, 216 transitions, 2455 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:03:11,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 287 transitions, 3559 flow [2024-06-27 19:03:11,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 287 transitions, 3468 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:11,383 INFO L231 Difference]: Finished difference. Result has 183 places, 225 transitions, 2698 flow [2024-06-27 19:03:11,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2698, PETRI_PLACES=183, PETRI_TRANSITIONS=225} [2024-06-27 19:03:11,383 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 133 predicate places. [2024-06-27 19:03:11,383 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 225 transitions, 2698 flow [2024-06-27 19:03:11,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:11,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:11,384 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 19:03:11,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:03:11,384 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:11,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2101766000, now seen corresponding path program 3 times [2024-06-27 19:03:11,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:11,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329794853] [2024-06-27 19:03:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:14,286 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 19:03:14,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:14,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329794853] [2024-06-27 19:03:14,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329794853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:14,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:14,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:14,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822117333] [2024-06-27 19:03:14,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:14,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:14,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:14,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:14,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:14,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:03:14,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 225 transitions, 2698 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:14,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:14,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:03:14,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:16,601 INFO L124 PetriNetUnfolderBase]: 4640/7161 cut-off events. [2024-06-27 19:03:16,601 INFO L125 PetriNetUnfolderBase]: For 121932/121932 co-relation queries the response was YES. [2024-06-27 19:03:16,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40502 conditions, 7161 events. 4640/7161 cut-off events. For 121932/121932 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 43175 event pairs, 924 based on Foata normal form. 1/7158 useless extension candidates. Maximal degree in co-relation 40417. Up to 6087 conditions per place. [2024-06-27 19:03:16,679 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 191 selfloop transitions, 88 changer transitions 0/286 dead transitions. [2024-06-27 19:03:16,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 286 transitions, 3698 flow [2024-06-27 19:03:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:03:16,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-27 19:03:16,701 INFO L175 Difference]: Start difference. First operand has 183 places, 225 transitions, 2698 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:03:16,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 286 transitions, 3698 flow [2024-06-27 19:03:16,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 286 transitions, 3584 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 19:03:16,952 INFO L231 Difference]: Finished difference. Result has 188 places, 228 transitions, 2822 flow [2024-06-27 19:03:16,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2596, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2822, PETRI_PLACES=188, PETRI_TRANSITIONS=228} [2024-06-27 19:03:16,952 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 138 predicate places. [2024-06-27 19:03:16,953 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 228 transitions, 2822 flow [2024-06-27 19:03:16,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:16,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:16,953 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 19:03:16,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:03:16,953 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:16,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:16,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2101766341, now seen corresponding path program 1 times [2024-06-27 19:03:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:16,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513493803] [2024-06-27 19:03:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:16,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:19,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:19,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513493803] [2024-06-27 19:03:19,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513493803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:19,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:19,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:19,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275363705] [2024-06-27 19:03:19,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:19,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:19,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:19,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:19,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:19,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:03:19,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 228 transitions, 2822 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:19,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:19,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:03:19,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:21,855 INFO L124 PetriNetUnfolderBase]: 4790/7383 cut-off events. [2024-06-27 19:03:21,855 INFO L125 PetriNetUnfolderBase]: For 132394/132394 co-relation queries the response was YES. [2024-06-27 19:03:21,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42446 conditions, 7383 events. 4790/7383 cut-off events. For 132394/132394 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 44520 event pairs, 924 based on Foata normal form. 2/7381 useless extension candidates. Maximal degree in co-relation 42359. Up to 6410 conditions per place. [2024-06-27 19:03:21,922 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 228 selfloop transitions, 82 changer transitions 0/317 dead transitions. [2024-06-27 19:03:21,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 317 transitions, 4074 flow [2024-06-27 19:03:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:03:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:03:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-27 19:03:21,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282608695652173 [2024-06-27 19:03:21,932 INFO L175 Difference]: Start difference. First operand has 188 places, 228 transitions, 2822 flow. Second operand 10 states and 243 transitions. [2024-06-27 19:03:21,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 317 transitions, 4074 flow [2024-06-27 19:03:22,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 317 transitions, 3914 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:22,203 INFO L231 Difference]: Finished difference. Result has 195 places, 246 transitions, 3114 flow [2024-06-27 19:03:22,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2662, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3114, PETRI_PLACES=195, PETRI_TRANSITIONS=246} [2024-06-27 19:03:22,204 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 145 predicate places. [2024-06-27 19:03:22,204 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 246 transitions, 3114 flow [2024-06-27 19:03:22,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:22,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:22,207 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 19:03:22,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:03:22,208 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:22,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash -779330811, now seen corresponding path program 2 times [2024-06-27 19:03:22,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:22,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370637483] [2024-06-27 19:03:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:22,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:25,252 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 19:03:25,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:25,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370637483] [2024-06-27 19:03:25,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370637483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:25,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:25,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:25,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996279405] [2024-06-27 19:03:25,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:25,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:25,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:25,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:25,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:25,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:03:25,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 246 transitions, 3114 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:25,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:25,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:03:25,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:27,745 INFO L124 PetriNetUnfolderBase]: 4996/7741 cut-off events. [2024-06-27 19:03:27,746 INFO L125 PetriNetUnfolderBase]: For 155031/155031 co-relation queries the response was YES. [2024-06-27 19:03:27,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46304 conditions, 7741 events. 4996/7741 cut-off events. For 155031/155031 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 47251 event pairs, 958 based on Foata normal form. 4/7743 useless extension candidates. Maximal degree in co-relation 46214. Up to 6755 conditions per place. [2024-06-27 19:03:27,813 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 272 selfloop transitions, 66 changer transitions 0/345 dead transitions. [2024-06-27 19:03:27,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 345 transitions, 4558 flow [2024-06-27 19:03:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:03:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:03:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-27 19:03:27,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197628458498024 [2024-06-27 19:03:27,815 INFO L175 Difference]: Start difference. First operand has 195 places, 246 transitions, 3114 flow. Second operand 11 states and 263 transitions. [2024-06-27 19:03:27,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 345 transitions, 4558 flow [2024-06-27 19:03:28,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 345 transitions, 4302 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:28,141 INFO L231 Difference]: Finished difference. Result has 203 places, 269 transitions, 3472 flow [2024-06-27 19:03:28,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3472, PETRI_PLACES=203, PETRI_TRANSITIONS=269} [2024-06-27 19:03:28,141 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 153 predicate places. [2024-06-27 19:03:28,141 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 269 transitions, 3472 flow [2024-06-27 19:03:28,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:28,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:28,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:28,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:03:28,142 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:28,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:28,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2045591696, now seen corresponding path program 4 times [2024-06-27 19:03:28,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:28,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520469596] [2024-06-27 19:03:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:28,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:31,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:31,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520469596] [2024-06-27 19:03:31,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520469596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:31,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:31,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:31,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42326644] [2024-06-27 19:03:31,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:31,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:31,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:31,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:31,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:31,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:03:31,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 269 transitions, 3472 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:31,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:31,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:03:31,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:33,377 INFO L124 PetriNetUnfolderBase]: 5019/7762 cut-off events. [2024-06-27 19:03:33,378 INFO L125 PetriNetUnfolderBase]: For 165894/165894 co-relation queries the response was YES. [2024-06-27 19:03:33,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47699 conditions, 7762 events. 5019/7762 cut-off events. For 165894/165894 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 47378 event pairs, 963 based on Foata normal form. 1/7761 useless extension candidates. Maximal degree in co-relation 47605. Up to 7043 conditions per place. [2024-06-27 19:03:33,446 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 273 selfloop transitions, 44 changer transitions 0/324 dead transitions. [2024-06-27 19:03:33,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 324 transitions, 4394 flow [2024-06-27 19:03:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:03:33,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190217391304348 [2024-06-27 19:03:33,448 INFO L175 Difference]: Start difference. First operand has 203 places, 269 transitions, 3472 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:03:33,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 324 transitions, 4394 flow [2024-06-27 19:03:33,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 324 transitions, 4181 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-27 19:03:33,800 INFO L231 Difference]: Finished difference. Result has 205 places, 272 transitions, 3407 flow [2024-06-27 19:03:33,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3259, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3407, PETRI_PLACES=205, PETRI_TRANSITIONS=272} [2024-06-27 19:03:33,800 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 155 predicate places. [2024-06-27 19:03:33,800 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 272 transitions, 3407 flow [2024-06-27 19:03:33,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:33,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:33,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:33,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:03:33,801 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:33,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2105485411, now seen corresponding path program 3 times [2024-06-27 19:03:33,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:33,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395664252] [2024-06-27 19:03:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:33,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:36,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:36,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395664252] [2024-06-27 19:03:36,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395664252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:36,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:36,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:36,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309946189] [2024-06-27 19:03:36,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:36,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:36,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:36,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:36,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:03:36,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 272 transitions, 3407 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:36,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:36,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:03:36,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:39,013 INFO L124 PetriNetUnfolderBase]: 5007/7742 cut-off events. [2024-06-27 19:03:39,014 INFO L125 PetriNetUnfolderBase]: For 165754/165754 co-relation queries the response was YES. [2024-06-27 19:03:39,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47115 conditions, 7742 events. 5007/7742 cut-off events. For 165754/165754 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 47236 event pairs, 948 based on Foata normal form. 4/7744 useless extension candidates. Maximal degree in co-relation 47019. Up to 6776 conditions per place. [2024-06-27 19:03:39,097 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 268 selfloop transitions, 66 changer transitions 0/341 dead transitions. [2024-06-27 19:03:39,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 341 transitions, 4340 flow [2024-06-27 19:03:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:03:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:03:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-27 19:03:39,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5239130434782608 [2024-06-27 19:03:39,101 INFO L175 Difference]: Start difference. First operand has 205 places, 272 transitions, 3407 flow. Second operand 10 states and 241 transitions. [2024-06-27 19:03:39,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 341 transitions, 4340 flow [2024-06-27 19:03:39,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 341 transitions, 4169 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 19:03:39,600 INFO L231 Difference]: Finished difference. Result has 209 places, 272 transitions, 3380 flow [2024-06-27 19:03:39,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3380, PETRI_PLACES=209, PETRI_TRANSITIONS=272} [2024-06-27 19:03:39,601 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 159 predicate places. [2024-06-27 19:03:39,601 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 272 transitions, 3380 flow [2024-06-27 19:03:39,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:39,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:39,601 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 19:03:39,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:03:39,601 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:39,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1779230345, now seen corresponding path program 1 times [2024-06-27 19:03:39,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:39,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188926246] [2024-06-27 19:03:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:39,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:43,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:43,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188926246] [2024-06-27 19:03:43,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188926246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:43,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:43,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:03:43,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869031689] [2024-06-27 19:03:43,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:43,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:03:43,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:43,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:03:43,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:03:43,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-27 19:03:43,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 272 transitions, 3380 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:43,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:43,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-27 19:03:43,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:46,034 INFO L124 PetriNetUnfolderBase]: 4851/7568 cut-off events. [2024-06-27 19:03:46,035 INFO L125 PetriNetUnfolderBase]: For 178435/178464 co-relation queries the response was YES. [2024-06-27 19:03:46,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46357 conditions, 7568 events. 4851/7568 cut-off events. For 178435/178464 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 47009 event pairs, 903 based on Foata normal form. 18/7523 useless extension candidates. Maximal degree in co-relation 46260. Up to 6383 conditions per place. [2024-06-27 19:03:46,114 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 260 selfloop transitions, 45 changer transitions 0/337 dead transitions. [2024-06-27 19:03:46,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 337 transitions, 4288 flow [2024-06-27 19:03:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:03:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:03:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:03:46,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-06-27 19:03:46,116 INFO L175 Difference]: Start difference. First operand has 209 places, 272 transitions, 3380 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:03:46,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 337 transitions, 4288 flow [2024-06-27 19:03:46,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 337 transitions, 4156 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:03:46,437 INFO L231 Difference]: Finished difference. Result has 209 places, 274 transitions, 3397 flow [2024-06-27 19:03:46,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3248, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3397, PETRI_PLACES=209, PETRI_TRANSITIONS=274} [2024-06-27 19:03:46,438 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 159 predicate places. [2024-06-27 19:03:46,438 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 274 transitions, 3397 flow [2024-06-27 19:03:46,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:46,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:46,438 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 19:03:46,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:03:46,439 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:46,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1372528816, now seen corresponding path program 5 times [2024-06-27 19:03:46,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:46,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132344731] [2024-06-27 19:03:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:46,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:49,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:49,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132344731] [2024-06-27 19:03:49,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132344731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:49,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:49,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:49,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873262641] [2024-06-27 19:03:49,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:49,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:49,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:49,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:49,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:03:49,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 274 transitions, 3397 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:49,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:49,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:03:49,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:51,538 INFO L124 PetriNetUnfolderBase]: 5242/8092 cut-off events. [2024-06-27 19:03:51,538 INFO L125 PetriNetUnfolderBase]: For 181033/181033 co-relation queries the response was YES. [2024-06-27 19:03:51,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49597 conditions, 8092 events. 5242/8092 cut-off events. For 181033/181033 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 49448 event pairs, 1019 based on Foata normal form. 1/8084 useless extension candidates. Maximal degree in co-relation 49499. Up to 6903 conditions per place. [2024-06-27 19:03:51,641 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 231 selfloop transitions, 99 changer transitions 0/337 dead transitions. [2024-06-27 19:03:51,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 337 transitions, 4623 flow [2024-06-27 19:03:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:03:51,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-27 19:03:51,643 INFO L175 Difference]: Start difference. First operand has 209 places, 274 transitions, 3397 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:03:51,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 337 transitions, 4623 flow [2024-06-27 19:03:52,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 337 transitions, 4502 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 19:03:52,058 INFO L231 Difference]: Finished difference. Result has 210 places, 277 transitions, 3536 flow [2024-06-27 19:03:52,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3536, PETRI_PLACES=210, PETRI_TRANSITIONS=277} [2024-06-27 19:03:52,059 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2024-06-27 19:03:52,059 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 277 transitions, 3536 flow [2024-06-27 19:03:52,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:52,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:52,059 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 19:03:52,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:03:52,060 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:52,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1761416478, now seen corresponding path program 6 times [2024-06-27 19:03:52,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:52,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415738761] [2024-06-27 19:03:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:52,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:54,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:54,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415738761] [2024-06-27 19:03:54,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415738761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:54,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:54,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:54,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474667743] [2024-06-27 19:03:54,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:54,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:54,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:54,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:54,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:54,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:03:54,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 277 transitions, 3536 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:54,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:54,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:03:54,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:57,263 INFO L124 PetriNetUnfolderBase]: 5265/8141 cut-off events. [2024-06-27 19:03:57,263 INFO L125 PetriNetUnfolderBase]: For 184147/184147 co-relation queries the response was YES. [2024-06-27 19:03:57,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49800 conditions, 8141 events. 5265/8141 cut-off events. For 184147/184147 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 49962 event pairs, 1027 based on Foata normal form. 1/8133 useless extension candidates. Maximal degree in co-relation 49701. Up to 6927 conditions per place. [2024-06-27 19:03:57,356 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 230 selfloop transitions, 100 changer transitions 0/337 dead transitions. [2024-06-27 19:03:57,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 337 transitions, 4764 flow [2024-06-27 19:03:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:03:57,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5353260869565217 [2024-06-27 19:03:57,358 INFO L175 Difference]: Start difference. First operand has 210 places, 277 transitions, 3536 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:03:57,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 337 transitions, 4764 flow [2024-06-27 19:03:57,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 337 transitions, 4479 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 19:03:57,732 INFO L231 Difference]: Finished difference. Result has 212 places, 280 transitions, 3519 flow [2024-06-27 19:03:57,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3269, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3519, PETRI_PLACES=212, PETRI_TRANSITIONS=280} [2024-06-27 19:03:57,733 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 162 predicate places. [2024-06-27 19:03:57,733 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 280 transitions, 3519 flow [2024-06-27 19:03:57,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:57,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:57,733 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 19:03:57,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:03:57,734 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:57,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:57,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1128688745, now seen corresponding path program 4 times [2024-06-27 19:03:57,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:57,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901413848] [2024-06-27 19:03:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:57,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:00,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:00,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901413848] [2024-06-27 19:04:00,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901413848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:00,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:00,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:00,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892425503] [2024-06-27 19:04:00,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:00,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:00,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:00,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:00,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:00,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:04:00,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 280 transitions, 3519 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:00,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:00,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:04:00,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:02,885 INFO L124 PetriNetUnfolderBase]: 5311/8208 cut-off events. [2024-06-27 19:04:02,885 INFO L125 PetriNetUnfolderBase]: For 186563/186572 co-relation queries the response was YES. [2024-06-27 19:04:02,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50002 conditions, 8208 events. 5311/8208 cut-off events. For 186563/186572 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 50414 event pairs, 1012 based on Foata normal form. 8/8210 useless extension candidates. Maximal degree in co-relation 49902. Up to 7269 conditions per place. [2024-06-27 19:04:02,978 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 267 selfloop transitions, 74 changer transitions 0/348 dead transitions. [2024-06-27 19:04:02,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 348 transitions, 4661 flow [2024-06-27 19:04:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:04:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:04:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:04:02,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193236714975845 [2024-06-27 19:04:02,979 INFO L175 Difference]: Start difference. First operand has 212 places, 280 transitions, 3519 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:04:02,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 348 transitions, 4661 flow [2024-06-27 19:04:03,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 348 transitions, 4465 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:04:03,328 INFO L231 Difference]: Finished difference. Result has 216 places, 285 transitions, 3541 flow [2024-06-27 19:04:03,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3323, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3541, PETRI_PLACES=216, PETRI_TRANSITIONS=285} [2024-06-27 19:04:03,329 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 166 predicate places. [2024-06-27 19:04:03,329 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 285 transitions, 3541 flow [2024-06-27 19:04:03,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:03,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:03,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:03,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:04:03,330 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:03,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:03,330 INFO L85 PathProgramCache]: Analyzing trace with hash 851592291, now seen corresponding path program 5 times [2024-06-27 19:04:03,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:03,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642831814] [2024-06-27 19:04:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:03,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:05,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:05,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642831814] [2024-06-27 19:04:05,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642831814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:05,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:05,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:05,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964530626] [2024-06-27 19:04:05,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:05,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:05,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:05,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:05,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:05,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:04:05,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 285 transitions, 3541 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:05,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:05,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:04:05,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:08,012 INFO L124 PetriNetUnfolderBase]: 5429/8400 cut-off events. [2024-06-27 19:04:08,012 INFO L125 PetriNetUnfolderBase]: For 194894/194903 co-relation queries the response was YES. [2024-06-27 19:04:08,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51201 conditions, 8400 events. 5429/8400 cut-off events. For 194894/194903 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 51784 event pairs, 1030 based on Foata normal form. 8/8402 useless extension candidates. Maximal degree in co-relation 51100. Up to 6910 conditions per place. [2024-06-27 19:04:08,103 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 248 selfloop transitions, 105 changer transitions 0/360 dead transitions. [2024-06-27 19:04:08,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 360 transitions, 5022 flow [2024-06-27 19:04:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:04:08,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-06-27 19:04:08,105 INFO L175 Difference]: Start difference. First operand has 216 places, 285 transitions, 3541 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:04:08,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 360 transitions, 5022 flow [2024-06-27 19:04:08,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 360 transitions, 4901 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:04:08,470 INFO L231 Difference]: Finished difference. Result has 221 places, 303 transitions, 3961 flow [2024-06-27 19:04:08,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3424, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3961, PETRI_PLACES=221, PETRI_TRANSITIONS=303} [2024-06-27 19:04:08,471 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 171 predicate places. [2024-06-27 19:04:08,471 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 303 transitions, 3961 flow [2024-06-27 19:04:08,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:08,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:08,471 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 19:04:08,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:04:08,471 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:08,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:08,472 INFO L85 PathProgramCache]: Analyzing trace with hash 851206000, now seen corresponding path program 7 times [2024-06-27 19:04:08,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:08,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142330906] [2024-06-27 19:04:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:08,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:11,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:11,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142330906] [2024-06-27 19:04:11,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142330906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:11,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:11,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:11,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875407659] [2024-06-27 19:04:11,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:11,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:11,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:11,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:11,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:11,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:04:11,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 303 transitions, 3961 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:11,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:11,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:04:11,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:13,496 INFO L124 PetriNetUnfolderBase]: 5452/8366 cut-off events. [2024-06-27 19:04:13,496 INFO L125 PetriNetUnfolderBase]: For 205408/205408 co-relation queries the response was YES. [2024-06-27 19:04:13,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53450 conditions, 8366 events. 5452/8366 cut-off events. For 205408/205408 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 51021 event pairs, 1021 based on Foata normal form. 1/8358 useless extension candidates. Maximal degree in co-relation 53345. Up to 7173 conditions per place. [2024-06-27 19:04:13,609 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 243 selfloop transitions, 106 changer transitions 0/356 dead transitions. [2024-06-27 19:04:13,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 356 transitions, 5102 flow [2024-06-27 19:04:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:04:13,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190217391304348 [2024-06-27 19:04:13,611 INFO L175 Difference]: Start difference. First operand has 221 places, 303 transitions, 3961 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:04:13,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 356 transitions, 5102 flow [2024-06-27 19:04:14,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 356 transitions, 5000 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-27 19:04:14,130 INFO L231 Difference]: Finished difference. Result has 227 places, 306 transitions, 4124 flow [2024-06-27 19:04:14,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3859, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4124, PETRI_PLACES=227, PETRI_TRANSITIONS=306} [2024-06-27 19:04:14,131 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 177 predicate places. [2024-06-27 19:04:14,131 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 306 transitions, 4124 flow [2024-06-27 19:04:14,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:14,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:14,131 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 19:04:14,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:04:14,131 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:14,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:14,132 INFO L85 PathProgramCache]: Analyzing trace with hash 851206341, now seen corresponding path program 6 times [2024-06-27 19:04:14,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:14,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977102702] [2024-06-27 19:04:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:14,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:16,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977102702] [2024-06-27 19:04:16,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977102702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:16,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:16,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:16,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725537524] [2024-06-27 19:04:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:16,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:16,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:16,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:16,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:16,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:04:16,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 306 transitions, 4124 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:16,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:16,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:04:16,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:18,985 INFO L124 PetriNetUnfolderBase]: 5446/8405 cut-off events. [2024-06-27 19:04:18,985 INFO L125 PetriNetUnfolderBase]: For 209510/209519 co-relation queries the response was YES. [2024-06-27 19:04:19,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53705 conditions, 8405 events. 5446/8405 cut-off events. For 209510/209519 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 51668 event pairs, 1024 based on Foata normal form. 8/8407 useless extension candidates. Maximal degree in co-relation 53597. Up to 7491 conditions per place. [2024-06-27 19:04:19,079 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 279 selfloop transitions, 71 changer transitions 0/357 dead transitions. [2024-06-27 19:04:19,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 357 transitions, 5112 flow [2024-06-27 19:04:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:04:19,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2024-06-27 19:04:19,081 INFO L175 Difference]: Start difference. First operand has 227 places, 306 transitions, 4124 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:04:19,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 357 transitions, 5112 flow [2024-06-27 19:04:19,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 357 transitions, 4928 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:04:19,597 INFO L231 Difference]: Finished difference. Result has 230 places, 307 transitions, 4110 flow [2024-06-27 19:04:19,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3940, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4110, PETRI_PLACES=230, PETRI_TRANSITIONS=307} [2024-06-27 19:04:19,598 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 180 predicate places. [2024-06-27 19:04:19,598 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 307 transitions, 4110 flow [2024-06-27 19:04:19,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:19,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:19,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:19,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:04:19,598 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:19,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:19,599 INFO L85 PathProgramCache]: Analyzing trace with hash -26018845, now seen corresponding path program 7 times [2024-06-27 19:04:19,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:19,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839847346] [2024-06-27 19:04:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:19,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:22,100 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 19:04:22,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:22,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839847346] [2024-06-27 19:04:22,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839847346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:22,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:22,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:22,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277255830] [2024-06-27 19:04:22,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:22,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:22,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:22,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:22,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:04:22,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 307 transitions, 4110 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:22,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:22,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:04:22,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:24,582 INFO L124 PetriNetUnfolderBase]: 5710/8780 cut-off events. [2024-06-27 19:04:24,583 INFO L125 PetriNetUnfolderBase]: For 232495/232495 co-relation queries the response was YES. [2024-06-27 19:04:24,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56707 conditions, 8780 events. 5710/8780 cut-off events. For 232495/232495 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 53978 event pairs, 984 based on Foata normal form. 2/8773 useless extension candidates. Maximal degree in co-relation 56598. Up to 7019 conditions per place. [2024-06-27 19:04:24,708 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 247 selfloop transitions, 133 changer transitions 0/387 dead transitions. [2024-06-27 19:04:24,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 387 transitions, 5766 flow [2024-06-27 19:04:24,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:04:24,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:04:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 19:04:24,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.533816425120773 [2024-06-27 19:04:24,710 INFO L175 Difference]: Start difference. First operand has 230 places, 307 transitions, 4110 flow. Second operand 9 states and 221 transitions. [2024-06-27 19:04:24,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 387 transitions, 5766 flow [2024-06-27 19:04:25,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 387 transitions, 5613 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:25,355 INFO L231 Difference]: Finished difference. Result has 234 places, 323 transitions, 4555 flow [2024-06-27 19:04:25,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3957, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4555, PETRI_PLACES=234, PETRI_TRANSITIONS=323} [2024-06-27 19:04:25,355 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 184 predicate places. [2024-06-27 19:04:25,356 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 323 transitions, 4555 flow [2024-06-27 19:04:25,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:25,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:25,356 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 19:04:25,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:04:25,356 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:25,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:25,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1005359455, now seen corresponding path program 8 times [2024-06-27 19:04:25,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:25,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51638196] [2024-06-27 19:04:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:25,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:28,100 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 19:04:28,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:28,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51638196] [2024-06-27 19:04:28,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51638196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:28,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:28,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:28,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321568228] [2024-06-27 19:04:28,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:28,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:28,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:04:28,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 323 transitions, 4555 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:28,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:28,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:04:28,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:30,952 INFO L124 PetriNetUnfolderBase]: 5770/8886 cut-off events. [2024-06-27 19:04:30,953 INFO L125 PetriNetUnfolderBase]: For 250996/250996 co-relation queries the response was YES. [2024-06-27 19:04:31,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59425 conditions, 8886 events. 5770/8886 cut-off events. For 250996/250996 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 54856 event pairs, 961 based on Foata normal form. 4/8881 useless extension candidates. Maximal degree in co-relation 59314. Up to 7074 conditions per place. [2024-06-27 19:04:31,056 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 250 selfloop transitions, 146 changer transitions 0/403 dead transitions. [2024-06-27 19:04:31,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 403 transitions, 6156 flow [2024-06-27 19:04:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:04:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:04:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-27 19:04:31,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282608695652173 [2024-06-27 19:04:31,059 INFO L175 Difference]: Start difference. First operand has 234 places, 323 transitions, 4555 flow. Second operand 10 states and 243 transitions. [2024-06-27 19:04:31,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 403 transitions, 6156 flow [2024-06-27 19:04:31,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 403 transitions, 5889 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-27 19:04:31,610 INFO L231 Difference]: Finished difference. Result has 241 places, 333 transitions, 4867 flow [2024-06-27 19:04:31,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4328, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4867, PETRI_PLACES=241, PETRI_TRANSITIONS=333} [2024-06-27 19:04:31,611 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 191 predicate places. [2024-06-27 19:04:31,611 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 333 transitions, 4867 flow [2024-06-27 19:04:31,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:31,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:31,615 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 19:04:31,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:04:31,615 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:31,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash 806628126, now seen corresponding path program 8 times [2024-06-27 19:04:31,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:31,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370839570] [2024-06-27 19:04:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:31,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:34,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:34,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370839570] [2024-06-27 19:04:34,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370839570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:34,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:34,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:34,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72229758] [2024-06-27 19:04:34,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:34,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:34,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:34,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:34,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:04:34,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 333 transitions, 4867 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:34,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:34,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:04:34,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:36,685 INFO L124 PetriNetUnfolderBase]: 5767/8925 cut-off events. [2024-06-27 19:04:36,685 INFO L125 PetriNetUnfolderBase]: For 242325/242325 co-relation queries the response was YES. [2024-06-27 19:04:36,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59702 conditions, 8925 events. 5767/8925 cut-off events. For 242325/242325 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 55658 event pairs, 1095 based on Foata normal form. 1/8917 useless extension candidates. Maximal degree in co-relation 59588. Up to 7774 conditions per place. [2024-06-27 19:04:36,803 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 296 selfloop transitions, 82 changer transitions 0/385 dead transitions. [2024-06-27 19:04:36,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 385 transitions, 6009 flow [2024-06-27 19:04:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:04:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:04:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:04:36,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527950310559007 [2024-06-27 19:04:36,805 INFO L175 Difference]: Start difference. First operand has 241 places, 333 transitions, 4867 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:04:36,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 385 transitions, 6009 flow [2024-06-27 19:04:37,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 385 transitions, 5716 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:37,395 INFO L231 Difference]: Finished difference. Result has 242 places, 333 transitions, 4749 flow [2024-06-27 19:04:37,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4574, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4749, PETRI_PLACES=242, PETRI_TRANSITIONS=333} [2024-06-27 19:04:37,395 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 192 predicate places. [2024-06-27 19:04:37,395 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 333 transitions, 4749 flow [2024-06-27 19:04:37,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:37,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:37,396 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 19:04:37,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:04:37,396 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:37,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:37,396 INFO L85 PathProgramCache]: Analyzing trace with hash 811385635, now seen corresponding path program 9 times [2024-06-27 19:04:37,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:37,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927027175] [2024-06-27 19:04:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:37,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:40,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:40,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927027175] [2024-06-27 19:04:40,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927027175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:40,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:40,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:40,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666270439] [2024-06-27 19:04:40,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:40,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:40,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:40,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:04:40,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 333 transitions, 4749 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:40,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:40,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:04:40,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:42,353 INFO L124 PetriNetUnfolderBase]: 5761/8915 cut-off events. [2024-06-27 19:04:42,354 INFO L125 PetriNetUnfolderBase]: For 242717/242717 co-relation queries the response was YES. [2024-06-27 19:04:42,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58652 conditions, 8915 events. 5761/8915 cut-off events. For 242717/242717 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 55476 event pairs, 1096 based on Foata normal form. 2/8908 useless extension candidates. Maximal degree in co-relation 58537. Up to 7864 conditions per place. [2024-06-27 19:04:42,465 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 296 selfloop transitions, 77 changer transitions 0/380 dead transitions. [2024-06-27 19:04:42,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 380 transitions, 5729 flow [2024-06-27 19:04:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:04:42,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:04:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:04:42,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372670807453416 [2024-06-27 19:04:42,467 INFO L175 Difference]: Start difference. First operand has 242 places, 333 transitions, 4749 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:04:42,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 380 transitions, 5729 flow [2024-06-27 19:04:43,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 380 transitions, 5437 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 19:04:43,067 INFO L231 Difference]: Finished difference. Result has 240 places, 333 transitions, 4618 flow [2024-06-27 19:04:43,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4618, PETRI_PLACES=240, PETRI_TRANSITIONS=333} [2024-06-27 19:04:43,068 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 190 predicate places. [2024-06-27 19:04:43,068 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 333 transitions, 4618 flow [2024-06-27 19:04:43,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:43,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:43,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:43,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:04:43,069 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:43,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:43,070 INFO L85 PathProgramCache]: Analyzing trace with hash 807014417, now seen corresponding path program 10 times [2024-06-27 19:04:43,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:43,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886668460] [2024-06-27 19:04:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:43,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:45,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:45,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886668460] [2024-06-27 19:04:45,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886668460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:45,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:45,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:45,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198248749] [2024-06-27 19:04:45,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:45,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:45,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:45,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:45,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:45,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:04:45,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 333 transitions, 4618 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:45,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:45,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:04:45,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:47,591 INFO L124 PetriNetUnfolderBase]: 5755/8878 cut-off events. [2024-06-27 19:04:47,591 INFO L125 PetriNetUnfolderBase]: For 235741/235741 co-relation queries the response was YES. [2024-06-27 19:04:47,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58190 conditions, 8878 events. 5755/8878 cut-off events. For 235741/235741 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 55019 event pairs, 1053 based on Foata normal form. 2/8871 useless extension candidates. Maximal degree in co-relation 58075. Up to 7060 conditions per place. [2024-06-27 19:04:47,719 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 239 selfloop transitions, 136 changer transitions 0/382 dead transitions. [2024-06-27 19:04:47,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 382 transitions, 5859 flow [2024-06-27 19:04:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:04:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:04:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:04:47,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-06-27 19:04:47,721 INFO L175 Difference]: Start difference. First operand has 240 places, 333 transitions, 4618 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:04:47,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 382 transitions, 5859 flow [2024-06-27 19:04:48,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 382 transitions, 5688 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:48,543 INFO L231 Difference]: Finished difference. Result has 241 places, 333 transitions, 4726 flow [2024-06-27 19:04:48,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4447, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4726, PETRI_PLACES=241, PETRI_TRANSITIONS=333} [2024-06-27 19:04:48,543 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 191 predicate places. [2024-06-27 19:04:48,543 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 333 transitions, 4726 flow [2024-06-27 19:04:48,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:48,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:48,544 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 19:04:48,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:04:48,544 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:48,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash 634253774, now seen corresponding path program 9 times [2024-06-27 19:04:48,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:48,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651214884] [2024-06-27 19:04:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:48,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:51,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:51,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651214884] [2024-06-27 19:04:51,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651214884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:51,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:51,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:51,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978021124] [2024-06-27 19:04:51,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:51,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:51,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:51,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:51,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:51,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:04:51,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 333 transitions, 4726 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:51,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:51,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:04:51,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:54,322 INFO L124 PetriNetUnfolderBase]: 5752/8918 cut-off events. [2024-06-27 19:04:54,322 INFO L125 PetriNetUnfolderBase]: For 238783/238783 co-relation queries the response was YES. [2024-06-27 19:04:54,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58942 conditions, 8918 events. 5752/8918 cut-off events. For 238783/238783 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 55672 event pairs, 1055 based on Foata normal form. 1/8917 useless extension candidates. Maximal degree in co-relation 58826. Up to 7755 conditions per place. [2024-06-27 19:04:54,455 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 313 selfloop transitions, 89 changer transitions 0/409 dead transitions. [2024-06-27 19:04:54,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 409 transitions, 5878 flow [2024-06-27 19:04:54,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:04:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:04:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 19:04:54,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5603864734299517 [2024-06-27 19:04:54,457 INFO L175 Difference]: Start difference. First operand has 241 places, 333 transitions, 4726 flow. Second operand 9 states and 232 transitions. [2024-06-27 19:04:54,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 409 transitions, 5878 flow [2024-06-27 19:04:55,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 409 transitions, 5582 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:55,164 INFO L231 Difference]: Finished difference. Result has 244 places, 333 transitions, 4625 flow [2024-06-27 19:04:55,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4430, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4625, PETRI_PLACES=244, PETRI_TRANSITIONS=333} [2024-06-27 19:04:55,166 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-06-27 19:04:55,166 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 333 transitions, 4625 flow [2024-06-27 19:04:55,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:55,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:55,171 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 19:04:55,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:04:55,171 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:55,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:55,171 INFO L85 PathProgramCache]: Analyzing trace with hash 634461505, now seen corresponding path program 11 times [2024-06-27 19:04:55,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:55,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050226137] [2024-06-27 19:04:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:55,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:58,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:58,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050226137] [2024-06-27 19:04:58,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050226137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:58,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:58,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:58,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904058861] [2024-06-27 19:04:58,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:58,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:58,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:58,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:58,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:58,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:04:58,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 333 transitions, 4625 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:58,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:58,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:04:58,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:00,707 INFO L124 PetriNetUnfolderBase]: 5940/9206 cut-off events. [2024-06-27 19:05:00,707 INFO L125 PetriNetUnfolderBase]: For 244139/244139 co-relation queries the response was YES. [2024-06-27 19:05:00,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60129 conditions, 9206 events. 5940/9206 cut-off events. For 244139/244139 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 57763 event pairs, 1021 based on Foata normal form. 4/9208 useless extension candidates. Maximal degree in co-relation 60012. Up to 7728 conditions per place. [2024-06-27 19:05:00,822 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 286 selfloop transitions, 128 changer transitions 0/421 dead transitions. [2024-06-27 19:05:00,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 421 transitions, 6151 flow [2024-06-27 19:05:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:05:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:05:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 19:05:00,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483091787439613 [2024-06-27 19:05:00,823 INFO L175 Difference]: Start difference. First operand has 244 places, 333 transitions, 4625 flow. Second operand 9 states and 227 transitions. [2024-06-27 19:05:00,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 421 transitions, 6151 flow [2024-06-27 19:05:01,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 421 transitions, 5915 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 19:05:01,516 INFO L231 Difference]: Finished difference. Result has 244 places, 354 transitions, 5099 flow [2024-06-27 19:05:01,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4393, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5099, PETRI_PLACES=244, PETRI_TRANSITIONS=354} [2024-06-27 19:05:01,516 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-06-27 19:05:01,516 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 354 transitions, 5099 flow [2024-06-27 19:05:01,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:01,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:01,517 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 19:05:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:05:01,517 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:01,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash 634254115, now seen corresponding path program 12 times [2024-06-27 19:05:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:01,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806784859] [2024-06-27 19:05:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:01,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:04,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:04,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806784859] [2024-06-27 19:05:04,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806784859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:04,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:04,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:04,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049488910] [2024-06-27 19:05:04,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:04,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:04,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:04,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:04,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:04,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:05:04,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 354 transitions, 5099 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:04,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:04,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:05:04,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:07,373 INFO L124 PetriNetUnfolderBase]: 5928/9190 cut-off events. [2024-06-27 19:05:07,374 INFO L125 PetriNetUnfolderBase]: For 242196/242196 co-relation queries the response was YES. [2024-06-27 19:05:07,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61175 conditions, 9190 events. 5928/9190 cut-off events. For 242196/242196 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 57657 event pairs, 1019 based on Foata normal form. 4/9192 useless extension candidates. Maximal degree in co-relation 61057. Up to 7718 conditions per place. [2024-06-27 19:05:07,476 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 304 selfloop transitions, 128 changer transitions 0/439 dead transitions. [2024-06-27 19:05:07,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 439 transitions, 6305 flow [2024-06-27 19:05:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:05:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:05:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 275 transitions. [2024-06-27 19:05:07,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-27 19:05:07,478 INFO L175 Difference]: Start difference. First operand has 244 places, 354 transitions, 5099 flow. Second operand 11 states and 275 transitions. [2024-06-27 19:05:07,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 439 transitions, 6305 flow [2024-06-27 19:05:08,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 439 transitions, 5939 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:08,257 INFO L231 Difference]: Finished difference. Result has 249 places, 354 transitions, 5013 flow [2024-06-27 19:05:08,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4733, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5013, PETRI_PLACES=249, PETRI_TRANSITIONS=354} [2024-06-27 19:05:08,258 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 199 predicate places. [2024-06-27 19:05:08,258 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 354 transitions, 5013 flow [2024-06-27 19:05:08,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:08,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:08,259 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] [2024-06-27 19:05:08,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:05:08,259 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:08,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:08,259 INFO L85 PathProgramCache]: Analyzing trace with hash -788041225, now seen corresponding path program 2 times [2024-06-27 19:05:08,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:08,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349298727] [2024-06-27 19:05:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:08,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:11,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:11,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349298727] [2024-06-27 19:05:11,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349298727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:11,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:11,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:11,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656580162] [2024-06-27 19:05:11,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:11,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:11,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:11,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:11,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:11,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-27 19:05:11,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 354 transitions, 5013 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:11,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:11,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-27 19:05:11,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:14,341 INFO L124 PetriNetUnfolderBase]: 5698/8881 cut-off events. [2024-06-27 19:05:14,341 INFO L125 PetriNetUnfolderBase]: For 256580/256606 co-relation queries the response was YES. [2024-06-27 19:05:14,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59066 conditions, 8881 events. 5698/8881 cut-off events. For 256580/256606 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 56416 event pairs, 980 based on Foata normal form. 18/8801 useless extension candidates. Maximal degree in co-relation 58947. Up to 7220 conditions per place. [2024-06-27 19:05:14,441 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 309 selfloop transitions, 52 changer transitions 0/405 dead transitions. [2024-06-27 19:05:14,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 405 transitions, 5985 flow [2024-06-27 19:05:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:05:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:05:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:05:14,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-06-27 19:05:14,442 INFO L175 Difference]: Start difference. First operand has 249 places, 354 transitions, 5013 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:05:14,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 405 transitions, 5985 flow [2024-06-27 19:05:15,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 405 transitions, 5679 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-27 19:05:15,034 INFO L231 Difference]: Finished difference. Result has 246 places, 356 transitions, 4889 flow [2024-06-27 19:05:15,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4889, PETRI_PLACES=246, PETRI_TRANSITIONS=356} [2024-06-27 19:05:15,035 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 196 predicate places. [2024-06-27 19:05:15,035 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 356 transitions, 4889 flow [2024-06-27 19:05:15,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:15,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:15,036 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 19:05:15,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:05:15,036 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:15,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1018254401, now seen corresponding path program 3 times [2024-06-27 19:05:15,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:15,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758187017] [2024-06-27 19:05:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:15,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:18,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:18,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758187017] [2024-06-27 19:05:18,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758187017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:18,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:18,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:18,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070859456] [2024-06-27 19:05:18,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:18,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:18,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:18,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:18,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:18,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-27 19:05:18,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 356 transitions, 4889 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:18,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:18,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-27 19:05:18,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:21,032 INFO L124 PetriNetUnfolderBase]: 5887/9211 cut-off events. [2024-06-27 19:05:21,033 INFO L125 PetriNetUnfolderBase]: For 261640/261666 co-relation queries the response was YES. [2024-06-27 19:05:21,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60569 conditions, 9211 events. 5887/9211 cut-off events. For 261640/261666 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 59098 event pairs, 981 based on Foata normal form. 16/9114 useless extension candidates. Maximal degree in co-relation 60450. Up to 7645 conditions per place. [2024-06-27 19:05:21,156 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 304 selfloop transitions, 53 changer transitions 0/401 dead transitions. [2024-06-27 19:05:21,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 401 transitions, 5873 flow [2024-06-27 19:05:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:05:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:05:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:05:21,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531055900621118 [2024-06-27 19:05:21,158 INFO L175 Difference]: Start difference. First operand has 246 places, 356 transitions, 4889 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:05:21,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 401 transitions, 5873 flow [2024-06-27 19:05:21,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 401 transitions, 5731 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:05:21,885 INFO L231 Difference]: Finished difference. Result has 248 places, 357 transitions, 4885 flow [2024-06-27 19:05:21,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4755, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4885, PETRI_PLACES=248, PETRI_TRANSITIONS=357} [2024-06-27 19:05:21,886 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 198 predicate places. [2024-06-27 19:05:21,887 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 357 transitions, 4885 flow [2024-06-27 19:05:21,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:21,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:21,887 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 19:05:21,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:05:21,887 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:21,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1018699871, now seen corresponding path program 4 times [2024-06-27 19:05:21,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:21,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997051208] [2024-06-27 19:05:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:21,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:25,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:25,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997051208] [2024-06-27 19:05:25,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997051208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:25,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:25,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:05:25,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322271084] [2024-06-27 19:05:25,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:25,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:05:25,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:25,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:05:25,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:05:25,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-27 19:05:25,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 357 transitions, 4885 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:25,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:25,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-27 19:05:25,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:28,175 INFO L124 PetriNetUnfolderBase]: 5974/9385 cut-off events. [2024-06-27 19:05:28,175 INFO L125 PetriNetUnfolderBase]: For 244109/244135 co-relation queries the response was YES. [2024-06-27 19:05:28,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60513 conditions, 9385 events. 5974/9385 cut-off events. For 244109/244135 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 60481 event pairs, 1003 based on Foata normal form. 12/9289 useless extension candidates. Maximal degree in co-relation 60393. Up to 7086 conditions per place. [2024-06-27 19:05:28,300 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 305 selfloop transitions, 58 changer transitions 0/407 dead transitions. [2024-06-27 19:05:28,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 407 transitions, 5981 flow [2024-06-27 19:05:28,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:05:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:05:28,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:05:28,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2024-06-27 19:05:28,301 INFO L175 Difference]: Start difference. First operand has 248 places, 357 transitions, 4885 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:05:28,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 407 transitions, 5981 flow [2024-06-27 19:05:29,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 407 transitions, 5875 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:05:29,072 INFO L231 Difference]: Finished difference. Result has 251 places, 360 transitions, 4996 flow [2024-06-27 19:05:29,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4779, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4996, PETRI_PLACES=251, PETRI_TRANSITIONS=360} [2024-06-27 19:05:29,072 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 201 predicate places. [2024-06-27 19:05:29,073 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 360 transitions, 4996 flow [2024-06-27 19:05:29,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:29,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:29,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:29,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:05:29,073 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:29,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:29,074 INFO L85 PathProgramCache]: Analyzing trace with hash 762886597, now seen corresponding path program 1 times [2024-06-27 19:05:29,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:29,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165812891] [2024-06-27 19:05:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:29,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:31,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:31,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165812891] [2024-06-27 19:05:31,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165812891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:31,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:31,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:31,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045793208] [2024-06-27 19:05:31,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:31,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:31,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:31,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:31,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:31,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:05:31,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 360 transitions, 4996 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:31,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:31,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:05:31,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:34,129 INFO L124 PetriNetUnfolderBase]: 6645/10488 cut-off events. [2024-06-27 19:05:34,130 INFO L125 PetriNetUnfolderBase]: For 284724/284724 co-relation queries the response was YES. [2024-06-27 19:05:34,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68204 conditions, 10488 events. 6645/10488 cut-off events. For 284724/284724 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 68494 event pairs, 1462 based on Foata normal form. 8/10493 useless extension candidates. Maximal degree in co-relation 68082. Up to 8979 conditions per place. [2024-06-27 19:05:34,259 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 364 selfloop transitions, 47 changer transitions 0/418 dead transitions. [2024-06-27 19:05:34,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 418 transitions, 6256 flow [2024-06-27 19:05:34,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:05:34,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529891304347826 [2024-06-27 19:05:34,261 INFO L175 Difference]: Start difference. First operand has 251 places, 360 transitions, 4996 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:05:34,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 418 transitions, 6256 flow [2024-06-27 19:05:35,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 418 transitions, 6175 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:05:35,057 INFO L231 Difference]: Finished difference. Result has 256 places, 364 transitions, 5162 flow [2024-06-27 19:05:35,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4915, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5162, PETRI_PLACES=256, PETRI_TRANSITIONS=364} [2024-06-27 19:05:35,058 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 206 predicate places. [2024-06-27 19:05:35,058 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 364 transitions, 5162 flow [2024-06-27 19:05:35,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:35,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:35,058 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 19:05:35,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:05:35,058 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:35,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:35,059 INFO L85 PathProgramCache]: Analyzing trace with hash -874428933, now seen corresponding path program 2 times [2024-06-27 19:05:35,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:35,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115098765] [2024-06-27 19:05:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:35,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:37,296 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 19:05:37,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:37,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115098765] [2024-06-27 19:05:37,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115098765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:37,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:37,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:37,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862719801] [2024-06-27 19:05:37,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:37,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:37,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:37,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:37,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:37,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:05:37,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 364 transitions, 5162 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:37,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:37,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:05:37,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:40,359 INFO L124 PetriNetUnfolderBase]: 6783/10712 cut-off events. [2024-06-27 19:05:40,359 INFO L125 PetriNetUnfolderBase]: For 304560/304560 co-relation queries the response was YES. [2024-06-27 19:05:40,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70601 conditions, 10712 events. 6783/10712 cut-off events. For 304560/304560 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 70230 event pairs, 1584 based on Foata normal form. 10/10719 useless extension candidates. Maximal degree in co-relation 70477. Up to 9482 conditions per place. [2024-06-27 19:05:40,520 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 367 selfloop transitions, 37 changer transitions 0/411 dead transitions. [2024-06-27 19:05:40,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 411 transitions, 6194 flow [2024-06-27 19:05:40,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 19:05:40,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081521739130435 [2024-06-27 19:05:40,522 INFO L175 Difference]: Start difference. First operand has 256 places, 364 transitions, 5162 flow. Second operand 8 states and 187 transitions. [2024-06-27 19:05:40,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 411 transitions, 6194 flow [2024-06-27 19:05:41,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 411 transitions, 6045 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 19:05:41,405 INFO L231 Difference]: Finished difference. Result has 260 places, 366 transitions, 5173 flow [2024-06-27 19:05:41,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5037, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5173, PETRI_PLACES=260, PETRI_TRANSITIONS=366} [2024-06-27 19:05:41,406 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 210 predicate places. [2024-06-27 19:05:41,406 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 366 transitions, 5173 flow [2024-06-27 19:05:41,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:41,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:41,406 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 19:05:41,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:05:41,407 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:41,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:41,407 INFO L85 PathProgramCache]: Analyzing trace with hash 851452357, now seen corresponding path program 3 times [2024-06-27 19:05:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:41,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970914342] [2024-06-27 19:05:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:41,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:43,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970914342] [2024-06-27 19:05:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970914342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:43,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:43,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:43,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291899886] [2024-06-27 19:05:43,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:43,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:43,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:43,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:43,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:05:43,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 366 transitions, 5173 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:43,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:43,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:05:43,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:46,526 INFO L124 PetriNetUnfolderBase]: 6891/10868 cut-off events. [2024-06-27 19:05:46,526 INFO L125 PetriNetUnfolderBase]: For 291460/291460 co-relation queries the response was YES. [2024-06-27 19:05:46,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70320 conditions, 10868 events. 6891/10868 cut-off events. For 291460/291460 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 71210 event pairs, 1570 based on Foata normal form. 8/10873 useless extension candidates. Maximal degree in co-relation 70194. Up to 9504 conditions per place. [2024-06-27 19:05:46,714 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 369 selfloop transitions, 41 changer transitions 0/417 dead transitions. [2024-06-27 19:05:46,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 417 transitions, 6217 flow [2024-06-27 19:05:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:05:46,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:05:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:05:46,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190217391304348 [2024-06-27 19:05:46,716 INFO L175 Difference]: Start difference. First operand has 260 places, 366 transitions, 5173 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:05:46,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 417 transitions, 6217 flow [2024-06-27 19:05:47,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 417 transitions, 6119 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:47,605 INFO L231 Difference]: Finished difference. Result has 262 places, 368 transitions, 5222 flow [2024-06-27 19:05:47,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5075, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5222, PETRI_PLACES=262, PETRI_TRANSITIONS=368} [2024-06-27 19:05:47,605 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 212 predicate places. [2024-06-27 19:05:47,605 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 368 transitions, 5222 flow [2024-06-27 19:05:47,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:47,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:47,606 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 19:05:47,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:05:47,606 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:47,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:47,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1011081311, now seen corresponding path program 4 times [2024-06-27 19:05:47,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:47,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100257728] [2024-06-27 19:05:47,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:47,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:49,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:49,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100257728] [2024-06-27 19:05:49,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100257728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:49,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:49,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:49,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883132712] [2024-06-27 19:05:49,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:49,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:49,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:49,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:49,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:05:49,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 368 transitions, 5222 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:49,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:49,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:05:49,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:52,650 INFO L124 PetriNetUnfolderBase]: 7029/11070 cut-off events. [2024-06-27 19:05:52,650 INFO L125 PetriNetUnfolderBase]: For 304850/304850 co-relation queries the response was YES. [2024-06-27 19:05:52,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71749 conditions, 11070 events. 7029/11070 cut-off events. For 304850/304850 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 72606 event pairs, 1623 based on Foata normal form. 10/11077 useless extension candidates. Maximal degree in co-relation 71622. Up to 9869 conditions per place. [2024-06-27 19:05:53,028 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 382 selfloop transitions, 31 changer transitions 0/420 dead transitions. [2024-06-27 19:05:53,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 420 transitions, 6268 flow [2024-06-27 19:05:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:05:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:05:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-27 19:05:53,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49516908212560384 [2024-06-27 19:05:53,032 INFO L175 Difference]: Start difference. First operand has 262 places, 368 transitions, 5222 flow. Second operand 9 states and 205 transitions. [2024-06-27 19:05:53,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 420 transitions, 6268 flow [2024-06-27 19:05:53,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 420 transitions, 6149 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:05:53,904 INFO L231 Difference]: Finished difference. Result has 265 places, 370 transitions, 5235 flow [2024-06-27 19:05:53,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5103, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5235, PETRI_PLACES=265, PETRI_TRANSITIONS=370} [2024-06-27 19:05:53,904 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 215 predicate places. [2024-06-27 19:05:53,905 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 370 transitions, 5235 flow [2024-06-27 19:05:53,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:53,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:53,905 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 19:05:53,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:05:53,905 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:53,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:53,906 INFO L85 PathProgramCache]: Analyzing trace with hash 807022353, now seen corresponding path program 5 times [2024-06-27 19:05:53,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:53,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288456005] [2024-06-27 19:05:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:53,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:56,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:56,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288456005] [2024-06-27 19:05:56,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288456005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:56,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:56,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:56,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044657300] [2024-06-27 19:05:56,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:56,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:56,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:56,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:56,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:05:56,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 370 transitions, 5235 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:56,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:56,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:05:56,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:58,883 INFO L124 PetriNetUnfolderBase]: 7132/11219 cut-off events. [2024-06-27 19:05:58,883 INFO L125 PetriNetUnfolderBase]: For 309000/309000 co-relation queries the response was YES. [2024-06-27 19:05:58,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72367 conditions, 11219 events. 7132/11219 cut-off events. For 309000/309000 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 73578 event pairs, 1650 based on Foata normal form. 10/11226 useless extension candidates. Maximal degree in co-relation 72239. Up to 10018 conditions per place. [2024-06-27 19:05:59,024 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 375 selfloop transitions, 30 changer transitions 0/412 dead transitions. [2024-06-27 19:05:59,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 412 transitions, 6245 flow [2024-06-27 19:05:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:05:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:05:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:05:59,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186335403726708 [2024-06-27 19:05:59,026 INFO L175 Difference]: Start difference. First operand has 265 places, 370 transitions, 5235 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:05:59,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 412 transitions, 6245 flow [2024-06-27 19:06:00,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 412 transitions, 6151 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 19:06:00,016 INFO L231 Difference]: Finished difference. Result has 265 places, 372 transitions, 5275 flow [2024-06-27 19:06:00,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5275, PETRI_PLACES=265, PETRI_TRANSITIONS=372} [2024-06-27 19:06:00,017 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 215 predicate places. [2024-06-27 19:06:00,017 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 372 transitions, 5275 flow [2024-06-27 19:06:00,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:00,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:00,017 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 19:06:00,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:06:00,018 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:00,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:00,018 INFO L85 PathProgramCache]: Analyzing trace with hash 811631651, now seen corresponding path program 6 times [2024-06-27 19:06:00,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:00,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243998947] [2024-06-27 19:06:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:00,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:02,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:02,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243998947] [2024-06-27 19:06:02,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243998947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:02,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:02,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:06:02,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772315235] [2024-06-27 19:06:02,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:02,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:06:02,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:02,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:06:02,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:06:02,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:06:02,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 372 transitions, 5275 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:02,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:02,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:06:02,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:05,023 INFO L124 PetriNetUnfolderBase]: 7114/11182 cut-off events. [2024-06-27 19:06:05,024 INFO L125 PetriNetUnfolderBase]: For 292293/292293 co-relation queries the response was YES. [2024-06-27 19:06:05,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71389 conditions, 11182 events. 7114/11182 cut-off events. For 292293/292293 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 73225 event pairs, 1526 based on Foata normal form. 8/11187 useless extension candidates. Maximal degree in co-relation 71260. Up to 9674 conditions per place. [2024-06-27 19:06:05,165 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 373 selfloop transitions, 39 changer transitions 0/419 dead transitions. [2024-06-27 19:06:05,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 419 transitions, 6265 flow [2024-06-27 19:06:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:05,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:06:05,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2024-06-27 19:06:05,167 INFO L175 Difference]: Start difference. First operand has 265 places, 372 transitions, 5275 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:06:05,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 419 transitions, 6265 flow [2024-06-27 19:06:06,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 419 transitions, 6151 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:06:06,227 INFO L231 Difference]: Finished difference. Result has 267 places, 372 transitions, 5244 flow [2024-06-27 19:06:06,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5161, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5244, PETRI_PLACES=267, PETRI_TRANSITIONS=372} [2024-06-27 19:06:06,228 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-27 19:06:06,228 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 372 transitions, 5244 flow [2024-06-27 19:06:06,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:06,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:06,229 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 19:06:06,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:06:06,229 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:06,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:06,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1018705823, now seen corresponding path program 1 times [2024-06-27 19:06:06,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:06,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293939000] [2024-06-27 19:06:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:06,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:09,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:09,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293939000] [2024-06-27 19:06:09,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293939000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:09,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:09,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:09,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831038915] [2024-06-27 19:06:09,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:09,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:09,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:09,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:09,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:09,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:06:09,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 372 transitions, 5244 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:09,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:09,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:06:09,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:12,052 INFO L124 PetriNetUnfolderBase]: 7101/11166 cut-off events. [2024-06-27 19:06:12,052 INFO L125 PetriNetUnfolderBase]: For 274697/274697 co-relation queries the response was YES. [2024-06-27 19:06:12,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70431 conditions, 11166 events. 7101/11166 cut-off events. For 274697/274697 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 73048 event pairs, 1571 based on Foata normal form. 6/11169 useless extension candidates. Maximal degree in co-relation 70301. Up to 9721 conditions per place. [2024-06-27 19:06:12,238 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 381 selfloop transitions, 38 changer transitions 0/426 dead transitions. [2024-06-27 19:06:12,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 426 transitions, 6346 flow [2024-06-27 19:06:12,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:06:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:06:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-27 19:06:12,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975845410628019 [2024-06-27 19:06:12,240 INFO L175 Difference]: Start difference. First operand has 267 places, 372 transitions, 5244 flow. Second operand 9 states and 206 transitions. [2024-06-27 19:06:12,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 426 transitions, 6346 flow [2024-06-27 19:06:13,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 426 transitions, 6211 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:06:13,207 INFO L231 Difference]: Finished difference. Result has 270 places, 374 transitions, 5270 flow [2024-06-27 19:06:13,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5109, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5270, PETRI_PLACES=270, PETRI_TRANSITIONS=374} [2024-06-27 19:06:13,208 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 220 predicate places. [2024-06-27 19:06:13,208 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 374 transitions, 5270 flow [2024-06-27 19:06:13,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:13,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:13,208 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 19:06:13,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:06:13,208 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:13,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:13,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1345727903, now seen corresponding path program 1 times [2024-06-27 19:06:13,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:13,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651167120] [2024-06-27 19:06:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:13,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:13,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:13,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651167120] [2024-06-27 19:06:13,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651167120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:13,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:13,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:06:13,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214011524] [2024-06-27 19:06:13,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:13,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:06:13,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:06:13,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:06:13,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-06-27 19:06:13,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 374 transitions, 5270 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:13,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:13,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-06-27 19:06:13,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:14,994 INFO L124 PetriNetUnfolderBase]: 4693/7788 cut-off events. [2024-06-27 19:06:14,994 INFO L125 PetriNetUnfolderBase]: For 255908/256392 co-relation queries the response was YES. [2024-06-27 19:06:15,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47886 conditions, 7788 events. 4693/7788 cut-off events. For 255908/256392 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53295 event pairs, 722 based on Foata normal form. 513/7958 useless extension candidates. Maximal degree in co-relation 47756. Up to 3410 conditions per place. [2024-06-27 19:06:15,123 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 136 selfloop transitions, 115 changer transitions 0/346 dead transitions. [2024-06-27 19:06:15,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 346 transitions, 5372 flow [2024-06-27 19:06:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:06:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:06:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-27 19:06:15,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 19:06:15,124 INFO L175 Difference]: Start difference. First operand has 270 places, 374 transitions, 5270 flow. Second operand 4 states and 116 transitions. [2024-06-27 19:06:15,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 346 transitions, 5372 flow [2024-06-27 19:06:15,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 346 transitions, 4656 flow, removed 191 selfloop flow, removed 27 redundant places. [2024-06-27 19:06:15,976 INFO L231 Difference]: Finished difference. Result has 248 places, 307 transitions, 4202 flow [2024-06-27 19:06:15,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3674, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4202, PETRI_PLACES=248, PETRI_TRANSITIONS=307} [2024-06-27 19:06:15,976 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 198 predicate places. [2024-06-27 19:06:15,976 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 307 transitions, 4202 flow [2024-06-27 19:06:15,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:15,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:15,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:15,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:06:15,977 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:15,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:15,977 INFO L85 PathProgramCache]: Analyzing trace with hash -675278698, now seen corresponding path program 1 times [2024-06-27 19:06:15,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:15,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705959800] [2024-06-27 19:06:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:15,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:17,999 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 19:06:17,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:18,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705959800] [2024-06-27 19:06:18,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705959800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:18,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:18,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:18,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827269127] [2024-06-27 19:06:18,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:18,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:18,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:18,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:06:18,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 307 transitions, 4202 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:18,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:18,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:06:18,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:20,949 INFO L124 PetriNetUnfolderBase]: 6787/10718 cut-off events. [2024-06-27 19:06:20,950 INFO L125 PetriNetUnfolderBase]: For 274915/274915 co-relation queries the response was YES. [2024-06-27 19:06:21,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65517 conditions, 10718 events. 6787/10718 cut-off events. For 274915/274915 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 69108 event pairs, 2298 based on Foata normal form. 8/10724 useless extension candidates. Maximal degree in co-relation 65397. Up to 9126 conditions per place. [2024-06-27 19:06:21,130 INFO L140 encePairwiseOnDemand]: 32/46 looper letters, 338 selfloop transitions, 77 changer transitions 8/430 dead transitions. [2024-06-27 19:06:21,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 430 transitions, 6085 flow [2024-06-27 19:06:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:06:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:06:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 296 transitions. [2024-06-27 19:06:21,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49498327759197325 [2024-06-27 19:06:21,132 INFO L175 Difference]: Start difference. First operand has 248 places, 307 transitions, 4202 flow. Second operand 13 states and 296 transitions. [2024-06-27 19:06:21,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 430 transitions, 6085 flow [2024-06-27 19:06:21,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 430 transitions, 6047 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 19:06:21,996 INFO L231 Difference]: Finished difference. Result has 263 places, 342 transitions, 4978 flow [2024-06-27 19:06:21,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4182, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4978, PETRI_PLACES=263, PETRI_TRANSITIONS=342} [2024-06-27 19:06:21,997 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 213 predicate places. [2024-06-27 19:06:21,997 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 342 transitions, 4978 flow [2024-06-27 19:06:21,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:21,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:21,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:21,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:06:21,998 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:21,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:21,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1014770514, now seen corresponding path program 2 times [2024-06-27 19:06:21,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:21,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285531371] [2024-06-27 19:06:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:21,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:25,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:25,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285531371] [2024-06-27 19:06:25,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285531371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:25,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:25,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:25,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522394816] [2024-06-27 19:06:25,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:25,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:25,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:25,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:25,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:25,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:06:25,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 342 transitions, 4978 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:25,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:25,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:06:25,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:27,906 INFO L124 PetriNetUnfolderBase]: 6344/9954 cut-off events. [2024-06-27 19:06:27,907 INFO L125 PetriNetUnfolderBase]: For 271814/271814 co-relation queries the response was YES. [2024-06-27 19:06:27,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61500 conditions, 9954 events. 6344/9954 cut-off events. For 271814/271814 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 62306 event pairs, 1946 based on Foata normal form. 8/9960 useless extension candidates. Maximal degree in co-relation 61374. Up to 7931 conditions per place. [2024-06-27 19:06:28,025 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 330 selfloop transitions, 86 changer transitions 0/423 dead transitions. [2024-06-27 19:06:28,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 423 transitions, 6477 flow [2024-06-27 19:06:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:06:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:06:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-27 19:06:28,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48616600790513836 [2024-06-27 19:06:28,026 INFO L175 Difference]: Start difference. First operand has 263 places, 342 transitions, 4978 flow. Second operand 11 states and 246 transitions. [2024-06-27 19:06:28,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 423 transitions, 6477 flow [2024-06-27 19:06:28,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 423 transitions, 6121 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-27 19:06:28,716 INFO L231 Difference]: Finished difference. Result has 268 places, 356 transitions, 5132 flow [2024-06-27 19:06:28,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4639, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5132, PETRI_PLACES=268, PETRI_TRANSITIONS=356} [2024-06-27 19:06:28,716 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 218 predicate places. [2024-06-27 19:06:28,717 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 356 transitions, 5132 flow [2024-06-27 19:06:28,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:28,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:28,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:28,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:06:28,717 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:28,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:28,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1590364262, now seen corresponding path program 3 times [2024-06-27 19:06:28,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:28,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852505113] [2024-06-27 19:06:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:28,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:32,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:32,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852505113] [2024-06-27 19:06:32,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852505113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:32,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:32,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:32,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924763507] [2024-06-27 19:06:32,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:32,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:32,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:32,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:32,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:32,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:06:32,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 356 transitions, 5132 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:32,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:32,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:06:32,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:35,440 INFO L124 PetriNetUnfolderBase]: 6816/10632 cut-off events. [2024-06-27 19:06:35,441 INFO L125 PetriNetUnfolderBase]: For 289710/289710 co-relation queries the response was YES. [2024-06-27 19:06:35,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66121 conditions, 10632 events. 6816/10632 cut-off events. For 289710/289710 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 66913 event pairs, 2396 based on Foata normal form. 16/10643 useless extension candidates. Maximal degree in co-relation 65994. Up to 9253 conditions per place. [2024-06-27 19:06:35,587 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 348 selfloop transitions, 87 changer transitions 0/442 dead transitions. [2024-06-27 19:06:35,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 442 transitions, 6781 flow [2024-06-27 19:06:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:06:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:06:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-27 19:06:35,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 19:06:35,589 INFO L175 Difference]: Start difference. First operand has 268 places, 356 transitions, 5132 flow. Second operand 12 states and 253 transitions. [2024-06-27 19:06:35,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 442 transitions, 6781 flow [2024-06-27 19:06:36,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 442 transitions, 6553 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-27 19:06:36,627 INFO L231 Difference]: Finished difference. Result has 275 places, 381 transitions, 5645 flow [2024-06-27 19:06:36,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4956, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5645, PETRI_PLACES=275, PETRI_TRANSITIONS=381} [2024-06-27 19:06:36,627 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 225 predicate places. [2024-06-27 19:06:36,627 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 381 transitions, 5645 flow [2024-06-27 19:06:36,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:36,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:36,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:36,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:06:36,628 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:36,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:36,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1734759438, now seen corresponding path program 1 times [2024-06-27 19:06:36,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:36,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436972207] [2024-06-27 19:06:36,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:36,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:39,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:39,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436972207] [2024-06-27 19:06:39,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436972207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:39,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:39,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:39,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299391906] [2024-06-27 19:06:39,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:39,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:39,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:39,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:39,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:39,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:06:39,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 381 transitions, 5645 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:39,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:39,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:06:39,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:42,975 INFO L124 PetriNetUnfolderBase]: 6832/10671 cut-off events. [2024-06-27 19:06:42,975 INFO L125 PetriNetUnfolderBase]: For 262101/262101 co-relation queries the response was YES. [2024-06-27 19:06:43,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66368 conditions, 10671 events. 6832/10671 cut-off events. For 262101/262101 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 67261 event pairs, 2545 based on Foata normal form. 2/10671 useless extension candidates. Maximal degree in co-relation 66238. Up to 9663 conditions per place. [2024-06-27 19:06:43,118 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 322 selfloop transitions, 104 changer transitions 0/433 dead transitions. [2024-06-27 19:06:43,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 433 transitions, 6880 flow [2024-06-27 19:06:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:06:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:06:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-27 19:06:43,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2024-06-27 19:06:43,120 INFO L175 Difference]: Start difference. First operand has 275 places, 381 transitions, 5645 flow. Second operand 11 states and 231 transitions. [2024-06-27 19:06:43,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 433 transitions, 6880 flow [2024-06-27 19:06:43,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 433 transitions, 6792 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 19:06:43,960 INFO L231 Difference]: Finished difference. Result has 282 places, 384 transitions, 5842 flow [2024-06-27 19:06:43,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5557, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5842, PETRI_PLACES=282, PETRI_TRANSITIONS=384} [2024-06-27 19:06:43,961 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 232 predicate places. [2024-06-27 19:06:43,961 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 384 transitions, 5842 flow [2024-06-27 19:06:43,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:43,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:43,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:43,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:06:43,962 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:43,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1007356740, now seen corresponding path program 4 times [2024-06-27 19:06:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:43,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808735962] [2024-06-27 19:06:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:43,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:47,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:47,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808735962] [2024-06-27 19:06:47,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808735962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:47,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:47,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:06:47,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702562860] [2024-06-27 19:06:47,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:47,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:06:47,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:47,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:06:47,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:06:47,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:06:47,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 384 transitions, 5842 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:47,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:47,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:06:47,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:50,295 INFO L124 PetriNetUnfolderBase]: 7062/10987 cut-off events. [2024-06-27 19:06:50,296 INFO L125 PetriNetUnfolderBase]: For 282570/282570 co-relation queries the response was YES. [2024-06-27 19:06:50,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68458 conditions, 10987 events. 7062/10987 cut-off events. For 282570/282570 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 69109 event pairs, 2508 based on Foata normal form. 8/10993 useless extension candidates. Maximal degree in co-relation 68326. Up to 9693 conditions per place. [2024-06-27 19:06:50,466 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 356 selfloop transitions, 87 changer transitions 0/450 dead transitions. [2024-06-27 19:06:50,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 450 transitions, 7173 flow [2024-06-27 19:06:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:06:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:06:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-27 19:06:50,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492753623188406 [2024-06-27 19:06:50,487 INFO L175 Difference]: Start difference. First operand has 282 places, 384 transitions, 5842 flow. Second operand 12 states and 248 transitions. [2024-06-27 19:06:50,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 450 transitions, 7173 flow [2024-06-27 19:06:51,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 450 transitions, 6918 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-27 19:06:51,334 INFO L231 Difference]: Finished difference. Result has 289 places, 395 transitions, 6038 flow [2024-06-27 19:06:51,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6038, PETRI_PLACES=289, PETRI_TRANSITIONS=395} [2024-06-27 19:06:51,335 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 239 predicate places. [2024-06-27 19:06:51,337 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 395 transitions, 6038 flow [2024-06-27 19:06:51,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:51,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:51,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:51,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:06:51,337 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:51,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:51,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1320328554, now seen corresponding path program 1 times [2024-06-27 19:06:51,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:51,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281542077] [2024-06-27 19:06:51,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:51,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:54,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:54,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281542077] [2024-06-27 19:06:54,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281542077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:54,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:54,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:06:54,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580174072] [2024-06-27 19:06:54,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:54,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:06:54,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:06:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:06:54,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:06:54,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 395 transitions, 6038 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:54,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:54,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:06:54,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:57,662 INFO L124 PetriNetUnfolderBase]: 7143/11116 cut-off events. [2024-06-27 19:06:57,663 INFO L125 PetriNetUnfolderBase]: For 283786/283786 co-relation queries the response was YES. [2024-06-27 19:06:57,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70032 conditions, 11116 events. 7143/11116 cut-off events. For 283786/283786 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 70116 event pairs, 2677 based on Foata normal form. 2/11114 useless extension candidates. Maximal degree in co-relation 69896. Up to 10122 conditions per place. [2024-06-27 19:06:57,814 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 381 selfloop transitions, 59 changer transitions 0/447 dead transitions. [2024-06-27 19:06:57,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 447 transitions, 7356 flow [2024-06-27 19:06:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:06:57,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:06:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:06:57,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054347826086957 [2024-06-27 19:06:57,816 INFO L175 Difference]: Start difference. First operand has 289 places, 395 transitions, 6038 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:06:57,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 447 transitions, 7356 flow [2024-06-27 19:06:58,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 447 transitions, 7172 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 19:06:58,729 INFO L231 Difference]: Finished difference. Result has 291 places, 399 transitions, 6058 flow [2024-06-27 19:06:58,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6058, PETRI_PLACES=291, PETRI_TRANSITIONS=399} [2024-06-27 19:06:58,730 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 241 predicate places. [2024-06-27 19:06:58,730 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 399 transitions, 6058 flow [2024-06-27 19:06:58,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:58,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:58,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:58,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:06:58,730 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:58,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:58,731 INFO L85 PathProgramCache]: Analyzing trace with hash 730243404, now seen corresponding path program 2 times [2024-06-27 19:06:58,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:58,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94356048] [2024-06-27 19:06:58,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:58,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:01,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:01,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94356048] [2024-06-27 19:07:01,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94356048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:01,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:01,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:07:01,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955874039] [2024-06-27 19:07:01,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:01,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:07:01,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:01,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:07:01,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:07:01,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:07:01,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 399 transitions, 6058 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:01,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:01,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:07:01,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:04,775 INFO L124 PetriNetUnfolderBase]: 7181/11185 cut-off events. [2024-06-27 19:07:04,775 INFO L125 PetriNetUnfolderBase]: For 279660/279660 co-relation queries the response was YES. [2024-06-27 19:07:04,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69496 conditions, 11185 events. 7181/11185 cut-off events. For 279660/279660 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 70709 event pairs, 2730 based on Foata normal form. 2/11183 useless extension candidates. Maximal degree in co-relation 69358. Up to 10326 conditions per place. [2024-06-27 19:07:04,931 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 375 selfloop transitions, 56 changer transitions 0/438 dead transitions. [2024-06-27 19:07:04,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 438 transitions, 7129 flow [2024-06-27 19:07:04,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:04,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-27 19:07:04,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47554347826086957 [2024-06-27 19:07:04,933 INFO L175 Difference]: Start difference. First operand has 291 places, 399 transitions, 6058 flow. Second operand 8 states and 175 transitions. [2024-06-27 19:07:04,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 438 transitions, 7129 flow [2024-06-27 19:07:06,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 438 transitions, 7014 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 19:07:06,085 INFO L231 Difference]: Finished difference. Result has 295 places, 401 transitions, 6104 flow [2024-06-27 19:07:06,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6104, PETRI_PLACES=295, PETRI_TRANSITIONS=401} [2024-06-27 19:07:06,086 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 245 predicate places. [2024-06-27 19:07:06,086 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 401 transitions, 6104 flow [2024-06-27 19:07:06,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:06,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:06,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:06,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:07:06,086 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:06,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:06,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1241380152, now seen corresponding path program 2 times [2024-06-27 19:07:06,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:06,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501602451] [2024-06-27 19:07:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:06,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:09,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:09,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501602451] [2024-06-27 19:07:09,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501602451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:09,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:09,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:09,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804067377] [2024-06-27 19:07:09,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:09,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:09,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:09,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:09,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:09,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:07:09,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 401 transitions, 6104 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:09,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:09,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:07:09,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:12,741 INFO L124 PetriNetUnfolderBase]: 7241/11272 cut-off events. [2024-06-27 19:07:12,742 INFO L125 PetriNetUnfolderBase]: For 294988/294988 co-relation queries the response was YES. [2024-06-27 19:07:12,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70478 conditions, 11272 events. 7241/11272 cut-off events. For 294988/294988 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 71307 event pairs, 2657 based on Foata normal form. 2/11270 useless extension candidates. Maximal degree in co-relation 70338. Up to 9867 conditions per place. [2024-06-27 19:07:12,922 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 264 selfloop transitions, 189 changer transitions 0/460 dead transitions. [2024-06-27 19:07:12,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 460 transitions, 7819 flow [2024-06-27 19:07:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:07:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:07:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-27 19:07:12,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45471014492753625 [2024-06-27 19:07:12,924 INFO L175 Difference]: Start difference. First operand has 295 places, 401 transitions, 6104 flow. Second operand 12 states and 251 transitions. [2024-06-27 19:07:12,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 460 transitions, 7819 flow [2024-06-27 19:07:14,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 460 transitions, 7698 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:07:14,088 INFO L231 Difference]: Finished difference. Result has 301 places, 410 transitions, 6574 flow [2024-06-27 19:07:14,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5983, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6574, PETRI_PLACES=301, PETRI_TRANSITIONS=410} [2024-06-27 19:07:14,088 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 251 predicate places. [2024-06-27 19:07:14,088 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 410 transitions, 6574 flow [2024-06-27 19:07:14,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:14,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:14,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:14,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:07:14,089 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:14,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:14,089 INFO L85 PathProgramCache]: Analyzing trace with hash 730247992, now seen corresponding path program 3 times [2024-06-27 19:07:14,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:14,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378302956] [2024-06-27 19:07:14,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:14,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:17,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:17,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378302956] [2024-06-27 19:07:17,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378302956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:17,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:17,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:17,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924954983] [2024-06-27 19:07:17,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:17,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:17,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:17,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:17,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:17,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:07:17,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 410 transitions, 6574 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:17,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:17,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:07:17,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:20,578 INFO L124 PetriNetUnfolderBase]: 7279/11330 cut-off events. [2024-06-27 19:07:20,579 INFO L125 PetriNetUnfolderBase]: For 308981/308981 co-relation queries the response was YES. [2024-06-27 19:07:20,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71709 conditions, 11330 events. 7279/11330 cut-off events. For 308981/308981 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 71638 event pairs, 2658 based on Foata normal form. 2/11328 useless extension candidates. Maximal degree in co-relation 71568. Up to 9902 conditions per place. [2024-06-27 19:07:20,735 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 264 selfloop transitions, 189 changer transitions 0/460 dead transitions. [2024-06-27 19:07:20,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 460 transitions, 8216 flow [2024-06-27 19:07:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:07:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:07:20,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-27 19:07:20,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45849802371541504 [2024-06-27 19:07:20,736 INFO L175 Difference]: Start difference. First operand has 301 places, 410 transitions, 6574 flow. Second operand 11 states and 232 transitions. [2024-06-27 19:07:20,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 460 transitions, 8216 flow [2024-06-27 19:07:21,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 460 transitions, 7921 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-27 19:07:21,952 INFO L231 Difference]: Finished difference. Result has 306 places, 416 transitions, 6809 flow [2024-06-27 19:07:21,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6343, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6809, PETRI_PLACES=306, PETRI_TRANSITIONS=416} [2024-06-27 19:07:21,952 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 256 predicate places. [2024-06-27 19:07:21,952 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 416 transitions, 6809 flow [2024-06-27 19:07:21,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:21,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:21,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:21,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:07:21,953 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:21,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash 730237762, now seen corresponding path program 4 times [2024-06-27 19:07:21,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:21,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419734336] [2024-06-27 19:07:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:21,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:25,276 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 19:07:25,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:25,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419734336] [2024-06-27 19:07:25,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419734336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:25,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:25,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:25,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797497714] [2024-06-27 19:07:25,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:25,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:25,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:25,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:25,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:07:25,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 416 transitions, 6809 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:25,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:25,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:07:25,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:28,677 INFO L124 PetriNetUnfolderBase]: 7273/11316 cut-off events. [2024-06-27 19:07:28,678 INFO L125 PetriNetUnfolderBase]: For 307840/307840 co-relation queries the response was YES. [2024-06-27 19:07:28,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71758 conditions, 11316 events. 7273/11316 cut-off events. For 307840/307840 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 71589 event pairs, 2658 based on Foata normal form. 2/11314 useless extension candidates. Maximal degree in co-relation 71615. Up to 9897 conditions per place. [2024-06-27 19:07:28,843 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 267 selfloop transitions, 190 changer transitions 0/464 dead transitions. [2024-06-27 19:07:28,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 464 transitions, 8197 flow [2024-06-27 19:07:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:07:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:07:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 264 transitions. [2024-06-27 19:07:28,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4414715719063545 [2024-06-27 19:07:28,844 INFO L175 Difference]: Start difference. First operand has 306 places, 416 transitions, 6809 flow. Second operand 13 states and 264 transitions. [2024-06-27 19:07:28,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 464 transitions, 8197 flow [2024-06-27 19:07:30,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 464 transitions, 7852 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 19:07:30,073 INFO L231 Difference]: Finished difference. Result has 312 places, 416 transitions, 6850 flow [2024-06-27 19:07:30,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6464, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6850, PETRI_PLACES=312, PETRI_TRANSITIONS=416} [2024-06-27 19:07:30,073 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 262 predicate places. [2024-06-27 19:07:30,074 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 416 transitions, 6850 flow [2024-06-27 19:07:30,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:30,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:30,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:30,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:07:30,074 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:30,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:30,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1011173708, now seen corresponding path program 3 times [2024-06-27 19:07:30,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:30,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881026002] [2024-06-27 19:07:30,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:30,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:33,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:33,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881026002] [2024-06-27 19:07:33,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881026002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:33,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:33,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:07:33,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808049310] [2024-06-27 19:07:33,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:33,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:07:33,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:33,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:07:33,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:07:33,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:07:33,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 416 transitions, 6850 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:33,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:33,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:07:33,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:36,376 INFO L124 PetriNetUnfolderBase]: 7447/11604 cut-off events. [2024-06-27 19:07:36,376 INFO L125 PetriNetUnfolderBase]: For 316323/316323 co-relation queries the response was YES. [2024-06-27 19:07:36,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73386 conditions, 11604 events. 7447/11604 cut-off events. For 316323/316323 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 73720 event pairs, 2737 based on Foata normal form. 2/11604 useless extension candidates. Maximal degree in co-relation 73242. Up to 10598 conditions per place. [2024-06-27 19:07:36,551 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 402 selfloop transitions, 47 changer transitions 0/456 dead transitions. [2024-06-27 19:07:36,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 456 transitions, 7991 flow [2024-06-27 19:07:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 19:07:36,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47282608695652173 [2024-06-27 19:07:36,553 INFO L175 Difference]: Start difference. First operand has 312 places, 416 transitions, 6850 flow. Second operand 8 states and 174 transitions. [2024-06-27 19:07:36,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 456 transitions, 7991 flow [2024-06-27 19:07:37,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 456 transitions, 7640 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 19:07:37,793 INFO L231 Difference]: Finished difference. Result has 309 places, 419 transitions, 6648 flow [2024-06-27 19:07:37,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6499, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6648, PETRI_PLACES=309, PETRI_TRANSITIONS=419} [2024-06-27 19:07:37,794 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 259 predicate places. [2024-06-27 19:07:37,794 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 419 transitions, 6648 flow [2024-06-27 19:07:37,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:37,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:37,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:37,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:07:37,795 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:37,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:37,795 INFO L85 PathProgramCache]: Analyzing trace with hash 671759908, now seen corresponding path program 5 times [2024-06-27 19:07:37,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:37,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706899405] [2024-06-27 19:07:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:37,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:41,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706899405] [2024-06-27 19:07:41,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706899405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:41,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:41,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:41,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12087455] [2024-06-27 19:07:41,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:41,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:41,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:41,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:41,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:41,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:07:41,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 419 transitions, 6648 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:41,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:41,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:07:41,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:44,292 INFO L124 PetriNetUnfolderBase]: 7507/11686 cut-off events. [2024-06-27 19:07:44,292 INFO L125 PetriNetUnfolderBase]: For 333615/333615 co-relation queries the response was YES. [2024-06-27 19:07:44,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74019 conditions, 11686 events. 7507/11686 cut-off events. For 333615/333615 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 74250 event pairs, 2706 based on Foata normal form. 2/11686 useless extension candidates. Maximal degree in co-relation 73874. Up to 10633 conditions per place. [2024-06-27 19:07:44,465 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 360 selfloop transitions, 103 changer transitions 0/470 dead transitions. [2024-06-27 19:07:44,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 470 transitions, 8173 flow [2024-06-27 19:07:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:07:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:07:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-27 19:07:44,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44466403162055335 [2024-06-27 19:07:44,467 INFO L175 Difference]: Start difference. First operand has 309 places, 419 transitions, 6648 flow. Second operand 11 states and 225 transitions. [2024-06-27 19:07:44,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 470 transitions, 8173 flow [2024-06-27 19:07:45,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 470 transitions, 8073 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:07:45,869 INFO L231 Difference]: Finished difference. Result has 314 places, 428 transitions, 6907 flow [2024-06-27 19:07:45,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6907, PETRI_PLACES=314, PETRI_TRANSITIONS=428} [2024-06-27 19:07:45,869 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 264 predicate places. [2024-06-27 19:07:45,870 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 428 transitions, 6907 flow [2024-06-27 19:07:45,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:45,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:45,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:45,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:07:45,870 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:45,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:45,871 INFO L85 PathProgramCache]: Analyzing trace with hash 671749678, now seen corresponding path program 6 times [2024-06-27 19:07:45,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:45,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121568496] [2024-06-27 19:07:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:45,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:48,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:48,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121568496] [2024-06-27 19:07:48,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121568496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:48,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:48,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:48,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328862723] [2024-06-27 19:07:48,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:48,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:48,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:48,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:48,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:48,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:07:48,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 428 transitions, 6907 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:48,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:48,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:07:48,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:52,326 INFO L124 PetriNetUnfolderBase]: 7501/11678 cut-off events. [2024-06-27 19:07:52,326 INFO L125 PetriNetUnfolderBase]: For 335069/335069 co-relation queries the response was YES. [2024-06-27 19:07:52,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74004 conditions, 11678 events. 7501/11678 cut-off events. For 335069/335069 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 74165 event pairs, 2705 based on Foata normal form. 2/11678 useless extension candidates. Maximal degree in co-relation 73858. Up to 10628 conditions per place. [2024-06-27 19:07:52,509 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 359 selfloop transitions, 103 changer transitions 0/469 dead transitions. [2024-06-27 19:07:52,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 469 transitions, 8143 flow [2024-06-27 19:07:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:07:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:07:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-27 19:07:52,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426877470355731 [2024-06-27 19:07:52,511 INFO L175 Difference]: Start difference. First operand has 314 places, 428 transitions, 6907 flow. Second operand 11 states and 224 transitions. [2024-06-27 19:07:52,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 469 transitions, 8143 flow [2024-06-27 19:07:53,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 469 transitions, 8017 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:07:53,721 INFO L231 Difference]: Finished difference. Result has 319 places, 428 transitions, 6993 flow [2024-06-27 19:07:53,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6781, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6993, PETRI_PLACES=319, PETRI_TRANSITIONS=428} [2024-06-27 19:07:53,722 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 269 predicate places. [2024-06-27 19:07:53,722 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 428 transitions, 6993 flow [2024-06-27 19:07:53,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:53,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:53,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:53,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:07:53,723 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:53,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:53,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1017607386, now seen corresponding path program 7 times [2024-06-27 19:07:53,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:53,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167240055] [2024-06-27 19:07:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:53,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:56,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:56,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167240055] [2024-06-27 19:07:56,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167240055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:56,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:56,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:56,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244510164] [2024-06-27 19:07:56,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:56,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:56,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:56,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:56,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:07:56,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 428 transitions, 6993 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:56,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:56,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:07:56,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:00,335 INFO L124 PetriNetUnfolderBase]: 7495/11667 cut-off events. [2024-06-27 19:08:00,336 INFO L125 PetriNetUnfolderBase]: For 335044/335044 co-relation queries the response was YES. [2024-06-27 19:08:00,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74144 conditions, 11667 events. 7495/11667 cut-off events. For 335044/335044 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 74121 event pairs, 2708 based on Foata normal form. 2/11667 useless extension candidates. Maximal degree in co-relation 73996. Up to 10623 conditions per place. [2024-06-27 19:08:00,482 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 360 selfloop transitions, 103 changer transitions 0/470 dead transitions. [2024-06-27 19:08:00,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 470 transitions, 8091 flow [2024-06-27 19:08:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:08:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:08:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-27 19:08:00,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329710144927536 [2024-06-27 19:08:00,484 INFO L175 Difference]: Start difference. First operand has 319 places, 428 transitions, 6993 flow. Second operand 12 states and 239 transitions. [2024-06-27 19:08:00,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 470 transitions, 8091 flow [2024-06-27 19:08:01,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 470 transitions, 7869 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 19:08:01,730 INFO L231 Difference]: Finished difference. Result has 322 places, 428 transitions, 6983 flow [2024-06-27 19:08:01,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6771, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6983, PETRI_PLACES=322, PETRI_TRANSITIONS=428} [2024-06-27 19:08:01,730 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 272 predicate places. [2024-06-27 19:08:01,730 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 428 transitions, 6983 flow [2024-06-27 19:08:01,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:01,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:01,731 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 19:08:01,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:08:01,731 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:01,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:01,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1493842850, now seen corresponding path program 5 times [2024-06-27 19:08:01,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:01,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371890902] [2024-06-27 19:08:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:01,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:05,033 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 19:08:05,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:05,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371890902] [2024-06-27 19:08:05,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371890902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:05,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:05,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:05,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418659572] [2024-06-27 19:08:05,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:05,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:05,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:05,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:08:05,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 428 transitions, 6983 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:05,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:05,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:08:05,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:08,399 INFO L124 PetriNetUnfolderBase]: 7477/11630 cut-off events. [2024-06-27 19:08:08,399 INFO L125 PetriNetUnfolderBase]: For 334219/334219 co-relation queries the response was YES. [2024-06-27 19:08:08,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73399 conditions, 11630 events. 7477/11630 cut-off events. For 334219/334219 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 73594 event pairs, 2019 based on Foata normal form. 8/11636 useless extension candidates. Maximal degree in co-relation 73250. Up to 8924 conditions per place. [2024-06-27 19:08:08,570 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 360 selfloop transitions, 123 changer transitions 0/490 dead transitions. [2024-06-27 19:08:08,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 490 transitions, 8251 flow [2024-06-27 19:08:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:08:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:08:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-27 19:08:08,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4891304347826087 [2024-06-27 19:08:08,572 INFO L175 Difference]: Start difference. First operand has 322 places, 428 transitions, 6983 flow. Second operand 10 states and 225 transitions. [2024-06-27 19:08:08,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 490 transitions, 8251 flow [2024-06-27 19:08:10,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 490 transitions, 7982 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-27 19:08:10,092 INFO L231 Difference]: Finished difference. Result has 321 places, 431 transitions, 7105 flow [2024-06-27 19:08:10,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6722, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7105, PETRI_PLACES=321, PETRI_TRANSITIONS=431} [2024-06-27 19:08:10,093 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 271 predicate places. [2024-06-27 19:08:10,093 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 431 transitions, 7105 flow [2024-06-27 19:08:10,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:10,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:10,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:10,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:08:10,094 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:10,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:10,094 INFO L85 PathProgramCache]: Analyzing trace with hash 959708430, now seen corresponding path program 4 times [2024-06-27 19:08:10,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:10,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668872104] [2024-06-27 19:08:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:10,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:13,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:13,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668872104] [2024-06-27 19:08:13,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668872104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:13,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:13,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:13,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467883410] [2024-06-27 19:08:13,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:13,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:13,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:13,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:13,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:13,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:08:13,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 431 transitions, 7105 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:13,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:13,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:08:13,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:16,297 INFO L124 PetriNetUnfolderBase]: 7558/11768 cut-off events. [2024-06-27 19:08:16,298 INFO L125 PetriNetUnfolderBase]: For 335644/335653 co-relation queries the response was YES. [2024-06-27 19:08:16,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76288 conditions, 11768 events. 7558/11768 cut-off events. For 335644/335653 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74884 event pairs, 2775 based on Foata normal form. 8/11770 useless extension candidates. Maximal degree in co-relation 76137. Up to 10768 conditions per place. [2024-06-27 19:08:16,473 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 417 selfloop transitions, 57 changer transitions 0/481 dead transitions. [2024-06-27 19:08:16,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 481 transitions, 8513 flow [2024-06-27 19:08:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:08:16,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945652173913043 [2024-06-27 19:08:16,475 INFO L175 Difference]: Start difference. First operand has 321 places, 431 transitions, 7105 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:08:16,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 481 transitions, 8513 flow [2024-06-27 19:08:18,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 481 transitions, 8302 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 19:08:18,148 INFO L231 Difference]: Finished difference. Result has 322 places, 435 transitions, 7101 flow [2024-06-27 19:08:18,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6898, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7101, PETRI_PLACES=322, PETRI_TRANSITIONS=435} [2024-06-27 19:08:18,148 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 272 predicate places. [2024-06-27 19:08:18,149 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 435 transitions, 7101 flow [2024-06-27 19:08:18,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:18,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:18,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:18,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:08:18,149 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:18,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1532187746, now seen corresponding path program 5 times [2024-06-27 19:08:18,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:18,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930597871] [2024-06-27 19:08:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:18,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:20,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:20,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930597871] [2024-06-27 19:08:20,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930597871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:20,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:20,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929986686] [2024-06-27 19:08:20,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:20,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:20,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:20,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:08:20,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 435 transitions, 7101 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:20,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:20,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:08:20,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:24,522 INFO L124 PetriNetUnfolderBase]: 7596/11843 cut-off events. [2024-06-27 19:08:24,522 INFO L125 PetriNetUnfolderBase]: For 330968/330977 co-relation queries the response was YES. [2024-06-27 19:08:24,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75736 conditions, 11843 events. 7596/11843 cut-off events. For 330968/330977 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 75608 event pairs, 2818 based on Foata normal form. 8/11845 useless extension candidates. Maximal degree in co-relation 75584. Up to 10915 conditions per place. [2024-06-27 19:08:24,675 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 410 selfloop transitions, 55 changer transitions 0/472 dead transitions. [2024-06-27 19:08:24,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 472 transitions, 8242 flow [2024-06-27 19:08:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 19:08:24,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46467391304347827 [2024-06-27 19:08:24,676 INFO L175 Difference]: Start difference. First operand has 322 places, 435 transitions, 7101 flow. Second operand 8 states and 171 transitions. [2024-06-27 19:08:24,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 472 transitions, 8242 flow [2024-06-27 19:08:26,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 472 transitions, 8107 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:26,090 INFO L231 Difference]: Finished difference. Result has 326 places, 437 transitions, 7129 flow [2024-06-27 19:08:26,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6984, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7129, PETRI_PLACES=326, PETRI_TRANSITIONS=437} [2024-06-27 19:08:26,090 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 276 predicate places. [2024-06-27 19:08:26,091 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 437 transitions, 7129 flow [2024-06-27 19:08:26,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:26,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:26,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:26,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:08:26,091 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:26,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash 954227878, now seen corresponding path program 8 times [2024-06-27 19:08:26,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:26,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173974838] [2024-06-27 19:08:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:26,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:29,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:29,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173974838] [2024-06-27 19:08:29,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173974838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:29,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:29,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:29,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835086986] [2024-06-27 19:08:29,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:29,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:29,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:29,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:29,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:29,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:08:29,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 437 transitions, 7129 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:29,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:29,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:08:29,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:33,028 INFO L124 PetriNetUnfolderBase]: 7612/11857 cut-off events. [2024-06-27 19:08:33,028 INFO L125 PetriNetUnfolderBase]: For 333104/333104 co-relation queries the response was YES. [2024-06-27 19:08:33,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75688 conditions, 11857 events. 7612/11857 cut-off events. For 333104/333104 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 75583 event pairs, 2784 based on Foata normal form. 2/11848 useless extension candidates. Maximal degree in co-relation 75534. Up to 10701 conditions per place. [2024-06-27 19:08:33,239 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 358 selfloop transitions, 118 changer transitions 0/483 dead transitions. [2024-06-27 19:08:33,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 483 transitions, 8466 flow [2024-06-27 19:08:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:08:33,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:08:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-27 19:08:33,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44466403162055335 [2024-06-27 19:08:33,240 INFO L175 Difference]: Start difference. First operand has 326 places, 437 transitions, 7129 flow. Second operand 11 states and 225 transitions. [2024-06-27 19:08:33,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 483 transitions, 8466 flow [2024-06-27 19:08:34,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 483 transitions, 8347 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:34,570 INFO L231 Difference]: Finished difference. Result has 331 places, 440 transitions, 7307 flow [2024-06-27 19:08:34,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7010, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7307, PETRI_PLACES=331, PETRI_TRANSITIONS=440} [2024-06-27 19:08:34,570 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 281 predicate places. [2024-06-27 19:08:34,571 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 440 transitions, 7307 flow [2024-06-27 19:08:34,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:34,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:34,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:34,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:08:34,571 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:34,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:34,571 INFO L85 PathProgramCache]: Analyzing trace with hash -859456702, now seen corresponding path program 9 times [2024-06-27 19:08:34,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:34,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383620994] [2024-06-27 19:08:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:34,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:37,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383620994] [2024-06-27 19:08:37,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383620994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:37,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:37,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:37,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272262490] [2024-06-27 19:08:37,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:37,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:37,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:37,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:37,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:08:37,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 440 transitions, 7307 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:37,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:37,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:08:37,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:41,140 INFO L124 PetriNetUnfolderBase]: 7650/11912 cut-off events. [2024-06-27 19:08:41,141 INFO L125 PetriNetUnfolderBase]: For 346120/346120 co-relation queries the response was YES. [2024-06-27 19:08:41,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76503 conditions, 11912 events. 7650/11912 cut-off events. For 346120/346120 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 75951 event pairs, 2784 based on Foata normal form. 2/11903 useless extension candidates. Maximal degree in co-relation 76348. Up to 10736 conditions per place. [2024-06-27 19:08:41,324 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 363 selfloop transitions, 120 changer transitions 0/490 dead transitions. [2024-06-27 19:08:41,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 490 transitions, 8889 flow [2024-06-27 19:08:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:08:41,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:08:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-27 19:08:41,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384057971014493 [2024-06-27 19:08:41,325 INFO L175 Difference]: Start difference. First operand has 331 places, 440 transitions, 7307 flow. Second operand 12 states and 242 transitions. [2024-06-27 19:08:41,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 490 transitions, 8889 flow [2024-06-27 19:08:42,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 490 transitions, 8517 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-27 19:08:42,748 INFO L231 Difference]: Finished difference. Result has 334 places, 446 transitions, 7303 flow [2024-06-27 19:08:42,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6975, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7303, PETRI_PLACES=334, PETRI_TRANSITIONS=446} [2024-06-27 19:08:42,749 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 284 predicate places. [2024-06-27 19:08:42,749 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 446 transitions, 7303 flow [2024-06-27 19:08:42,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:42,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:42,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:42,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:08:42,749 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:42,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:42,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2130806452, now seen corresponding path program 6 times [2024-06-27 19:08:42,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:42,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103179729] [2024-06-27 19:08:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:42,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:45,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:45,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103179729] [2024-06-27 19:08:45,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103179729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:45,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:45,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101816221] [2024-06-27 19:08:45,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:45,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:45,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:45,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:45,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:08:45,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 446 transitions, 7303 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:45,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:45,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:08:45,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:48,735 INFO L124 PetriNetUnfolderBase]: 7688/11959 cut-off events. [2024-06-27 19:08:48,735 INFO L125 PetriNetUnfolderBase]: For 351350/351359 co-relation queries the response was YES. [2024-06-27 19:08:48,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76801 conditions, 11959 events. 7688/11959 cut-off events. For 351350/351359 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 76327 event pairs, 2360 based on Foata normal form. 8/11961 useless extension candidates. Maximal degree in co-relation 76645. Up to 10427 conditions per place. [2024-06-27 19:08:48,954 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 416 selfloop transitions, 81 changer transitions 0/504 dead transitions. [2024-06-27 19:08:48,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 504 transitions, 9026 flow [2024-06-27 19:08:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:48,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:08:48,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135869565217391 [2024-06-27 19:08:48,955 INFO L175 Difference]: Start difference. First operand has 334 places, 446 transitions, 7303 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:08:48,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 504 transitions, 9026 flow [2024-06-27 19:08:50,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 504 transitions, 8785 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 19:08:50,586 INFO L231 Difference]: Finished difference. Result has 335 places, 452 transitions, 7424 flow [2024-06-27 19:08:50,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7062, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7424, PETRI_PLACES=335, PETRI_TRANSITIONS=452} [2024-06-27 19:08:50,587 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 285 predicate places. [2024-06-27 19:08:50,587 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 452 transitions, 7424 flow [2024-06-27 19:08:50,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:50,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:50,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:50,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:08:50,588 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:50,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2120330932, now seen corresponding path program 7 times [2024-06-27 19:08:50,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:50,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811093640] [2024-06-27 19:08:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:50,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:53,049 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 19:08:53,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:53,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811093640] [2024-06-27 19:08:53,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811093640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:53,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:53,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:53,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460500756] [2024-06-27 19:08:53,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:53,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:53,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:53,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:53,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:53,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:08:53,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 452 transitions, 7424 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:53,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:53,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:08:53,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:56,358 INFO L124 PetriNetUnfolderBase]: 7734/12027 cut-off events. [2024-06-27 19:08:56,359 INFO L125 PetriNetUnfolderBase]: For 363337/363346 co-relation queries the response was YES. [2024-06-27 19:08:56,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78416 conditions, 12027 events. 7734/12027 cut-off events. For 363337/363346 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 76667 event pairs, 2347 based on Foata normal form. 8/12029 useless extension candidates. Maximal degree in co-relation 78258. Up to 10463 conditions per place. [2024-06-27 19:08:56,561 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 411 selfloop transitions, 85 changer transitions 0/503 dead transitions. [2024-06-27 19:08:56,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 503 transitions, 8939 flow [2024-06-27 19:08:56,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 19:08:56,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:08:56,563 INFO L175 Difference]: Start difference. First operand has 335 places, 452 transitions, 7424 flow. Second operand 8 states and 184 transitions. [2024-06-27 19:08:56,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 503 transitions, 8939 flow [2024-06-27 19:08:58,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 503 transitions, 8760 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-27 19:08:58,383 INFO L231 Difference]: Finished difference. Result has 341 places, 456 transitions, 7553 flow [2024-06-27 19:08:58,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7285, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7553, PETRI_PLACES=341, PETRI_TRANSITIONS=456} [2024-06-27 19:08:58,383 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 291 predicate places. [2024-06-27 19:08:58,384 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 456 transitions, 7553 flow [2024-06-27 19:08:58,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:58,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:58,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:58,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:08:58,385 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:58,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:58,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2062238482, now seen corresponding path program 8 times [2024-06-27 19:08:58,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:58,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301259042] [2024-06-27 19:08:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:58,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:00,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:00,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301259042] [2024-06-27 19:09:00,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301259042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:00,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:00,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:00,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769171386] [2024-06-27 19:09:00,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:00,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:00,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:00,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:00,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:00,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:09:00,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 456 transitions, 7553 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:00,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:00,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:09:00,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:04,550 INFO L124 PetriNetUnfolderBase]: 7823/12200 cut-off events. [2024-06-27 19:09:04,550 INFO L125 PetriNetUnfolderBase]: For 371531/371540 co-relation queries the response was YES. [2024-06-27 19:09:04,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79391 conditions, 12200 events. 7823/12200 cut-off events. For 371531/371540 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 78384 event pairs, 2854 based on Foata normal form. 8/12202 useless extension candidates. Maximal degree in co-relation 79230. Up to 11120 conditions per place. [2024-06-27 19:09:04,974 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 426 selfloop transitions, 66 changer transitions 0/499 dead transitions. [2024-06-27 19:09:04,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 499 transitions, 9013 flow [2024-06-27 19:09:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 19:09:04,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47282608695652173 [2024-06-27 19:09:04,976 INFO L175 Difference]: Start difference. First operand has 341 places, 456 transitions, 7553 flow. Second operand 8 states and 174 transitions. [2024-06-27 19:09:04,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 499 transitions, 9013 flow [2024-06-27 19:09:07,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 499 transitions, 8877 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:09:07,328 INFO L231 Difference]: Finished difference. Result has 346 places, 462 transitions, 7703 flow [2024-06-27 19:09:07,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7703, PETRI_PLACES=346, PETRI_TRANSITIONS=462} [2024-06-27 19:09:07,329 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 296 predicate places. [2024-06-27 19:09:07,329 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 462 transitions, 7703 flow [2024-06-27 19:09:07,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:07,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:07,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:07,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:09:07,330 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:07,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:07,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1856976592, now seen corresponding path program 9 times [2024-06-27 19:09:07,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:07,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943259221] [2024-06-27 19:09:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:07,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:10,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:10,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943259221] [2024-06-27 19:09:10,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943259221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:10,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:10,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351404729] [2024-06-27 19:09:10,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:10,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:10,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:10,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:10,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:09:10,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 462 transitions, 7703 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:10,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:10,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:09:10,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:13,973 INFO L124 PetriNetUnfolderBase]: 7818/12193 cut-off events. [2024-06-27 19:09:13,974 INFO L125 PetriNetUnfolderBase]: For 371811/371820 co-relation queries the response was YES. [2024-06-27 19:09:14,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79075 conditions, 12193 events. 7818/12193 cut-off events. For 371811/371820 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 78280 event pairs, 2876 based on Foata normal form. 8/12195 useless extension candidates. Maximal degree in co-relation 78912. Up to 11229 conditions per place. [2024-06-27 19:09:14,163 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 428 selfloop transitions, 57 changer transitions 0/492 dead transitions. [2024-06-27 19:09:14,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 492 transitions, 8820 flow [2024-06-27 19:09:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 19:09:14,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453804347826087 [2024-06-27 19:09:14,165 INFO L175 Difference]: Start difference. First operand has 346 places, 462 transitions, 7703 flow. Second operand 8 states and 167 transitions. [2024-06-27 19:09:14,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 492 transitions, 8820 flow [2024-06-27 19:09:16,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 492 transitions, 8672 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:09:16,269 INFO L231 Difference]: Finished difference. Result has 349 places, 462 transitions, 7674 flow [2024-06-27 19:09:16,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7674, PETRI_PLACES=349, PETRI_TRANSITIONS=462} [2024-06-27 19:09:16,270 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 299 predicate places. [2024-06-27 19:09:16,270 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 462 transitions, 7674 flow [2024-06-27 19:09:16,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:16,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:16,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:16,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:09:16,270 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:16,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:16,271 INFO L85 PathProgramCache]: Analyzing trace with hash -859446472, now seen corresponding path program 10 times [2024-06-27 19:09:16,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:16,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841031637] [2024-06-27 19:09:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:16,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:19,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841031637] [2024-06-27 19:09:19,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841031637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:19,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:19,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:19,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272600914] [2024-06-27 19:09:19,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:19,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:19,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:19,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:19,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:09:19,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 462 transitions, 7674 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:19,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:19,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:09:19,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:23,223 INFO L124 PetriNetUnfolderBase]: 7812/12177 cut-off events. [2024-06-27 19:09:23,223 INFO L125 PetriNetUnfolderBase]: For 369161/369161 co-relation queries the response was YES. [2024-06-27 19:09:23,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78644 conditions, 12177 events. 7812/12177 cut-off events. For 369161/369161 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 78120 event pairs, 2838 based on Foata normal form. 2/12168 useless extension candidates. Maximal degree in co-relation 78480. Up to 10971 conditions per place. [2024-06-27 19:09:23,388 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 374 selfloop transitions, 119 changer transitions 0/500 dead transitions. [2024-06-27 19:09:23,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 500 transitions, 8984 flow [2024-06-27 19:09:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:09:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:09:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 19:09:23,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45217391304347826 [2024-06-27 19:09:23,389 INFO L175 Difference]: Start difference. First operand has 349 places, 462 transitions, 7674 flow. Second operand 10 states and 208 transitions. [2024-06-27 19:09:23,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 500 transitions, 8984 flow [2024-06-27 19:09:25,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 500 transitions, 8849 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:25,108 INFO L231 Difference]: Finished difference. Result has 353 places, 462 transitions, 7783 flow [2024-06-27 19:09:25,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7539, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7783, PETRI_PLACES=353, PETRI_TRANSITIONS=462} [2024-06-27 19:09:25,108 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 303 predicate places. [2024-06-27 19:09:25,109 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 462 transitions, 7783 flow [2024-06-27 19:09:25,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:25,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:25,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:25,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:09:25,109 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:25,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:25,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1249803268, now seen corresponding path program 11 times [2024-06-27 19:09:25,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:25,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038311322] [2024-06-27 19:09:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:25,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:27,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:27,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038311322] [2024-06-27 19:09:27,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038311322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:27,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:27,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:27,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773254558] [2024-06-27 19:09:27,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:27,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:27,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:27,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:27,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:28,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:09:28,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 462 transitions, 7783 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:28,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:28,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:09:28,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:32,101 INFO L124 PetriNetUnfolderBase]: 7850/12226 cut-off events. [2024-06-27 19:09:32,101 INFO L125 PetriNetUnfolderBase]: For 383664/383664 co-relation queries the response was YES. [2024-06-27 19:09:32,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79468 conditions, 12226 events. 7850/12226 cut-off events. For 383664/383664 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 78323 event pairs, 2706 based on Foata normal form. 2/12217 useless extension candidates. Maximal degree in co-relation 79303. Up to 10491 conditions per place. [2024-06-27 19:09:32,467 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 270 selfloop transitions, 224 changer transitions 0/501 dead transitions. [2024-06-27 19:09:32,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 501 transitions, 9358 flow [2024-06-27 19:09:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:09:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:09:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-27 19:09:32,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2024-06-27 19:09:32,468 INFO L175 Difference]: Start difference. First operand has 353 places, 462 transitions, 7783 flow. Second operand 9 states and 192 transitions. [2024-06-27 19:09:32,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 501 transitions, 9358 flow [2024-06-27 19:09:34,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 501 transitions, 9114 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:09:34,460 INFO L231 Difference]: Finished difference. Result has 353 places, 468 transitions, 8116 flow [2024-06-27 19:09:34,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7545, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8116, PETRI_PLACES=353, PETRI_TRANSITIONS=468} [2024-06-27 19:09:34,461 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 303 predicate places. [2024-06-27 19:09:34,461 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 468 transitions, 8116 flow [2024-06-27 19:09:34,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:34,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:34,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:34,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:09:34,462 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:34,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:34,462 INFO L85 PathProgramCache]: Analyzing trace with hash 617583426, now seen corresponding path program 12 times [2024-06-27 19:09:34,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:34,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169349469] [2024-06-27 19:09:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:34,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:37,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:37,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169349469] [2024-06-27 19:09:37,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169349469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:37,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:37,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:37,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727656764] [2024-06-27 19:09:37,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:37,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:37,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:37,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:37,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:37,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:09:37,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 468 transitions, 8116 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:37,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:37,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:09:37,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:41,254 INFO L124 PetriNetUnfolderBase]: 7866/12263 cut-off events. [2024-06-27 19:09:41,255 INFO L125 PetriNetUnfolderBase]: For 392999/392999 co-relation queries the response was YES. [2024-06-27 19:09:41,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80231 conditions, 12263 events. 7866/12263 cut-off events. For 392999/392999 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 78832 event pairs, 2844 based on Foata normal form. 2/12254 useless extension candidates. Maximal degree in co-relation 80065. Up to 11100 conditions per place. [2024-06-27 19:09:41,495 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 384 selfloop transitions, 114 changer transitions 0/505 dead transitions. [2024-06-27 19:09:41,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 505 transitions, 9474 flow [2024-06-27 19:09:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:09:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:09:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 19:09:41,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288537549407115 [2024-06-27 19:09:41,496 INFO L175 Difference]: Start difference. First operand has 353 places, 468 transitions, 8116 flow. Second operand 11 states and 217 transitions. [2024-06-27 19:09:41,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 505 transitions, 9474 flow [2024-06-27 19:09:43,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 505 transitions, 8955 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:43,381 INFO L231 Difference]: Finished difference. Result has 358 places, 471 transitions, 7881 flow [2024-06-27 19:09:43,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7603, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7881, PETRI_PLACES=358, PETRI_TRANSITIONS=471} [2024-06-27 19:09:43,382 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 308 predicate places. [2024-06-27 19:09:43,382 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 471 transitions, 7881 flow [2024-06-27 19:09:43,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:43,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:43,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:43,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:09:43,383 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:43,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:43,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1855357190, now seen corresponding path program 13 times [2024-06-27 19:09:43,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:43,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554984731] [2024-06-27 19:09:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:43,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:46,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:46,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554984731] [2024-06-27 19:09:46,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554984731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:46,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:46,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:46,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447165986] [2024-06-27 19:09:46,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:46,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:46,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:46,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:46,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:46,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:09:46,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 471 transitions, 7881 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:46,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:46,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:09:46,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:50,308 INFO L124 PetriNetUnfolderBase]: 7860/12255 cut-off events. [2024-06-27 19:09:50,309 INFO L125 PetriNetUnfolderBase]: For 385877/385877 co-relation queries the response was YES. [2024-06-27 19:09:50,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79519 conditions, 12255 events. 7860/12255 cut-off events. For 385877/385877 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 78733 event pairs, 2844 based on Foata normal form. 2/12246 useless extension candidates. Maximal degree in co-relation 79353. Up to 11095 conditions per place. [2024-06-27 19:09:50,488 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 379 selfloop transitions, 113 changer transitions 0/499 dead transitions. [2024-06-27 19:09:50,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 499 transitions, 8983 flow [2024-06-27 19:09:50,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:09:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:09:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 19:09:50,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468599033816425 [2024-06-27 19:09:50,490 INFO L175 Difference]: Start difference. First operand has 358 places, 471 transitions, 7881 flow. Second operand 9 states and 185 transitions. [2024-06-27 19:09:50,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 499 transitions, 8983 flow [2024-06-27 19:09:52,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 499 transitions, 8677 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 19:09:52,249 INFO L231 Difference]: Finished difference. Result has 358 places, 471 transitions, 7807 flow [2024-06-27 19:09:52,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7575, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7807, PETRI_PLACES=358, PETRI_TRANSITIONS=471} [2024-06-27 19:09:52,252 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 308 predicate places. [2024-06-27 19:09:52,253 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 471 transitions, 7807 flow [2024-06-27 19:09:52,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:52,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:52,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:52,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:09:52,253 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:52,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:52,253 INFO L85 PathProgramCache]: Analyzing trace with hash -609501168, now seen corresponding path program 10 times [2024-06-27 19:09:52,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:52,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196668559] [2024-06-27 19:09:52,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:52,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:54,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:54,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196668559] [2024-06-27 19:09:54,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196668559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:54,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:54,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:54,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746912318] [2024-06-27 19:09:54,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:54,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:54,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:54,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:54,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:54,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:09:54,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 471 transitions, 7807 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:54,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:54,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:09:54,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:58,250 INFO L124 PetriNetUnfolderBase]: 7855/12235 cut-off events. [2024-06-27 19:09:58,251 INFO L125 PetriNetUnfolderBase]: For 383555/383555 co-relation queries the response was YES. [2024-06-27 19:09:58,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79230 conditions, 12235 events. 7855/12235 cut-off events. For 383555/383555 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 78496 event pairs, 2813 based on Foata normal form. 2/12226 useless extension candidates. Maximal degree in co-relation 79063. Up to 11167 conditions per place. [2024-06-27 19:09:58,463 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 425 selfloop transitions, 76 changer transitions 0/508 dead transitions. [2024-06-27 19:09:58,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 508 transitions, 8980 flow [2024-06-27 19:09:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:09:58,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031055900621118 [2024-06-27 19:09:58,467 INFO L175 Difference]: Start difference. First operand has 358 places, 471 transitions, 7807 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:09:58,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 508 transitions, 8980 flow [2024-06-27 19:10:00,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 508 transitions, 8744 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:10:00,327 INFO L231 Difference]: Finished difference. Result has 357 places, 471 transitions, 7732 flow [2024-06-27 19:10:00,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7571, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7732, PETRI_PLACES=357, PETRI_TRANSITIONS=471} [2024-06-27 19:10:00,327 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 307 predicate places. [2024-06-27 19:10:00,328 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 471 transitions, 7732 flow [2024-06-27 19:10:00,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:00,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:00,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:00,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:10:00,328 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:00,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash -609234258, now seen corresponding path program 11 times [2024-06-27 19:10:00,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:00,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372623305] [2024-06-27 19:10:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:00,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:02,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:02,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372623305] [2024-06-27 19:10:02,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372623305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:02,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:02,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:10:02,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738560639] [2024-06-27 19:10:02,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:02,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:10:02,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:02,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:10:02,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:10:02,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:10:02,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 471 transitions, 7732 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:02,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:02,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:10:02,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:06,517 INFO L124 PetriNetUnfolderBase]: 7850/12195 cut-off events. [2024-06-27 19:10:06,517 INFO L125 PetriNetUnfolderBase]: For 380147/380147 co-relation queries the response was YES. [2024-06-27 19:10:06,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78973 conditions, 12195 events. 7850/12195 cut-off events. For 380147/380147 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 77952 event pairs, 2259 based on Foata normal form. 2/12186 useless extension candidates. Maximal degree in co-relation 78805. Up to 10352 conditions per place. [2024-06-27 19:10:06,706 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 413 selfloop transitions, 97 changer transitions 0/517 dead transitions. [2024-06-27 19:10:06,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 517 transitions, 9180 flow [2024-06-27 19:10:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:10:06,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2024-06-27 19:10:06,708 INFO L175 Difference]: Start difference. First operand has 357 places, 471 transitions, 7732 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:10:06,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 517 transitions, 9180 flow [2024-06-27 19:10:08,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 517 transitions, 9004 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:10:08,848 INFO L231 Difference]: Finished difference. Result has 358 places, 471 transitions, 7760 flow [2024-06-27 19:10:08,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7556, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7760, PETRI_PLACES=358, PETRI_TRANSITIONS=471} [2024-06-27 19:10:08,848 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 308 predicate places. [2024-06-27 19:10:08,849 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 471 transitions, 7760 flow [2024-06-27 19:10:08,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:08,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:08,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:08,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:10:08,849 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:08,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:08,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1812962642, now seen corresponding path program 12 times [2024-06-27 19:10:08,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:08,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075132968] [2024-06-27 19:10:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:08,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:11,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:11,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075132968] [2024-06-27 19:10:11,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075132968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:11,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:11,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:10:11,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891442029] [2024-06-27 19:10:11,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:11,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:10:11,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:11,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:10:11,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:10:11,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:10:11,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 471 transitions, 7760 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:11,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:11,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:10:11,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:15,968 INFO L124 PetriNetUnfolderBase]: 7845/12223 cut-off events. [2024-06-27 19:10:15,968 INFO L125 PetriNetUnfolderBase]: For 380424/380424 co-relation queries the response was YES. [2024-06-27 19:10:16,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79233 conditions, 12223 events. 7845/12223 cut-off events. For 380424/380424 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 78438 event pairs, 2777 based on Foata normal form. 2/12223 useless extension candidates. Maximal degree in co-relation 79064. Up to 10581 conditions per place. [2024-06-27 19:10:16,142 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 434 selfloop transitions, 85 changer transitions 0/526 dead transitions. [2024-06-27 19:10:16,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 526 transitions, 9067 flow [2024-06-27 19:10:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:10:16,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048309178743962 [2024-06-27 19:10:16,143 INFO L175 Difference]: Start difference. First operand has 358 places, 471 transitions, 7760 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:10:16,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 526 transitions, 9067 flow [2024-06-27 19:10:17,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 526 transitions, 8840 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:17,940 INFO L231 Difference]: Finished difference. Result has 360 places, 471 transitions, 7727 flow [2024-06-27 19:10:17,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7533, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7727, PETRI_PLACES=360, PETRI_TRANSITIONS=471} [2024-06-27 19:10:17,941 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 310 predicate places. [2024-06-27 19:10:17,941 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 471 transitions, 7727 flow [2024-06-27 19:10:17,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:17,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:17,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:17,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:10:17,942 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:17,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:17,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1278504414, now seen corresponding path program 14 times [2024-06-27 19:10:17,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:17,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924889059] [2024-06-27 19:10:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:17,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:20,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:20,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924889059] [2024-06-27 19:10:20,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924889059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:20,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:20,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:20,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789948396] [2024-06-27 19:10:20,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:20,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:20,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:20,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:10:20,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 471 transitions, 7727 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:20,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:20,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:10:20,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:24,719 INFO L124 PetriNetUnfolderBase]: 7905/12322 cut-off events. [2024-06-27 19:10:24,720 INFO L125 PetriNetUnfolderBase]: For 404381/404381 co-relation queries the response was YES. [2024-06-27 19:10:24,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80141 conditions, 12322 events. 7905/12322 cut-off events. For 404381/404381 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 79183 event pairs, 2705 based on Foata normal form. 2/12313 useless extension candidates. Maximal degree in co-relation 79973. Up to 10759 conditions per place. [2024-06-27 19:10:24,891 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 320 selfloop transitions, 188 changer transitions 0/515 dead transitions. [2024-06-27 19:10:24,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 515 transitions, 9432 flow [2024-06-27 19:10:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:10:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:10:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 19:10:24,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45217391304347826 [2024-06-27 19:10:24,893 INFO L175 Difference]: Start difference. First operand has 360 places, 471 transitions, 7727 flow. Second operand 10 states and 208 transitions. [2024-06-27 19:10:24,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 515 transitions, 9432 flow [2024-06-27 19:10:27,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 515 transitions, 9278 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:27,074 INFO L231 Difference]: Finished difference. Result has 363 places, 480 transitions, 8150 flow [2024-06-27 19:10:27,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7577, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8150, PETRI_PLACES=363, PETRI_TRANSITIONS=480} [2024-06-27 19:10:27,075 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 313 predicate places. [2024-06-27 19:10:27,075 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 480 transitions, 8150 flow [2024-06-27 19:10:27,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:27,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:27,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:27,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:10:27,076 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:27,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:27,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1101372894, now seen corresponding path program 15 times [2024-06-27 19:10:27,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:27,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948245123] [2024-06-27 19:10:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:27,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:30,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:30,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948245123] [2024-06-27 19:10:30,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948245123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:30,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:30,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:30,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800596646] [2024-06-27 19:10:30,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:30,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:30,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:30,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:30,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:30,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:10:30,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 480 transitions, 8150 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:30,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:30,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:10:30,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:34,343 INFO L124 PetriNetUnfolderBase]: 7899/12320 cut-off events. [2024-06-27 19:10:34,343 INFO L125 PetriNetUnfolderBase]: For 399210/399210 co-relation queries the response was YES. [2024-06-27 19:10:34,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80149 conditions, 12320 events. 7899/12320 cut-off events. For 399210/399210 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 79232 event pairs, 2695 based on Foata normal form. 2/12311 useless extension candidates. Maximal degree in co-relation 79980. Up to 10754 conditions per place. [2024-06-27 19:10:34,533 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 321 selfloop transitions, 190 changer transitions 0/518 dead transitions. [2024-06-27 19:10:34,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 518 transitions, 9682 flow [2024-06-27 19:10:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:10:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:10:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-27 19:10:34,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44664031620553357 [2024-06-27 19:10:34,535 INFO L175 Difference]: Start difference. First operand has 363 places, 480 transitions, 8150 flow. Second operand 11 states and 226 transitions. [2024-06-27 19:10:34,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 518 transitions, 9682 flow [2024-06-27 19:10:36,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 518 transitions, 9184 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:36,683 INFO L231 Difference]: Finished difference. Result has 367 places, 480 transitions, 8038 flow [2024-06-27 19:10:36,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7652, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8038, PETRI_PLACES=367, PETRI_TRANSITIONS=480} [2024-06-27 19:10:36,684 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 317 predicate places. [2024-06-27 19:10:36,684 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 480 transitions, 8038 flow [2024-06-27 19:10:36,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:36,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:36,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:36,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:10:36,685 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:36,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:36,685 INFO L85 PathProgramCache]: Analyzing trace with hash -616848230, now seen corresponding path program 16 times [2024-06-27 19:10:36,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:36,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637650664] [2024-06-27 19:10:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:36,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:39,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:39,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637650664] [2024-06-27 19:10:39,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637650664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:39,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:39,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:39,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968233024] [2024-06-27 19:10:39,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:39,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:39,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:39,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:39,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:10:39,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 480 transitions, 8038 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:39,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:39,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:10:39,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:42,909 INFO L124 PetriNetUnfolderBase]: 7915/12342 cut-off events. [2024-06-27 19:10:42,910 INFO L125 PetriNetUnfolderBase]: For 402434/402434 co-relation queries the response was YES. [2024-06-27 19:10:43,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80136 conditions, 12342 events. 7915/12342 cut-off events. For 402434/402434 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 79318 event pairs, 2848 based on Foata normal form. 2/12333 useless extension candidates. Maximal degree in co-relation 79966. Up to 11226 conditions per place. [2024-06-27 19:10:43,133 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 421 selfloop transitions, 88 changer transitions 0/516 dead transitions. [2024-06-27 19:10:43,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 516 transitions, 9424 flow [2024-06-27 19:10:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:10:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:10:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 19:10:43,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701086956521739 [2024-06-27 19:10:43,134 INFO L175 Difference]: Start difference. First operand has 367 places, 480 transitions, 8038 flow. Second operand 8 states and 173 transitions. [2024-06-27 19:10:43,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 516 transitions, 9424 flow [2024-06-27 19:10:45,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 516 transitions, 8923 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 19:10:45,352 INFO L231 Difference]: Finished difference. Result has 367 places, 483 transitions, 7769 flow [2024-06-27 19:10:45,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7543, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7769, PETRI_PLACES=367, PETRI_TRANSITIONS=483} [2024-06-27 19:10:45,352 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 317 predicate places. [2024-06-27 19:10:45,352 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 483 transitions, 7769 flow [2024-06-27 19:10:45,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:45,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:45,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:45,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:10:45,353 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:45,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:45,353 INFO L85 PathProgramCache]: Analyzing trace with hash -616858460, now seen corresponding path program 17 times [2024-06-27 19:10:45,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:45,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319400378] [2024-06-27 19:10:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:45,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:48,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:48,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319400378] [2024-06-27 19:10:48,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319400378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:48,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:48,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:48,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923173079] [2024-06-27 19:10:48,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:48,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:48,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:48,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:48,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:48,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:10:48,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 483 transitions, 7769 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:48,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:48,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:10:48,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:52,246 INFO L124 PetriNetUnfolderBase]: 7909/12334 cut-off events. [2024-06-27 19:10:52,246 INFO L125 PetriNetUnfolderBase]: For 398379/398379 co-relation queries the response was YES. [2024-06-27 19:10:52,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78751 conditions, 12334 events. 7909/12334 cut-off events. For 398379/398379 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 79407 event pairs, 2847 based on Foata normal form. 2/12325 useless extension candidates. Maximal degree in co-relation 78581. Up to 11221 conditions per place. [2024-06-27 19:10:52,459 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 425 selfloop transitions, 91 changer transitions 0/523 dead transitions. [2024-06-27 19:10:52,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 523 transitions, 8965 flow [2024-06-27 19:10:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:10:52,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:10:52,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 19:10:52,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45217391304347826 [2024-06-27 19:10:52,461 INFO L175 Difference]: Start difference. First operand has 367 places, 483 transitions, 7769 flow. Second operand 10 states and 208 transitions. [2024-06-27 19:10:52,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 523 transitions, 8965 flow [2024-06-27 19:10:54,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 523 transitions, 8664 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:54,556 INFO L231 Difference]: Finished difference. Result has 370 places, 483 transitions, 7656 flow [2024-06-27 19:10:54,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7468, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7656, PETRI_PLACES=370, PETRI_TRANSITIONS=483} [2024-06-27 19:10:54,556 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 320 predicate places. [2024-06-27 19:10:54,557 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 483 transitions, 7656 flow [2024-06-27 19:10:54,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:54,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:54,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:54,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:10:54,557 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:54,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:54,558 INFO L85 PathProgramCache]: Analyzing trace with hash -604883780, now seen corresponding path program 18 times [2024-06-27 19:10:54,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:54,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173360778] [2024-06-27 19:10:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:54,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:57,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:57,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173360778] [2024-06-27 19:10:57,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173360778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:57,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:57,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:57,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866270874] [2024-06-27 19:10:57,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:57,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:57,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:57,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:57,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:57,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:10:57,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 483 transitions, 7656 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:57,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:57,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:10:57,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:01,365 INFO L124 PetriNetUnfolderBase]: 7903/12326 cut-off events. [2024-06-27 19:11:01,365 INFO L125 PetriNetUnfolderBase]: For 393327/393327 co-relation queries the response was YES. [2024-06-27 19:11:01,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78407 conditions, 12326 events. 7903/12326 cut-off events. For 393327/393327 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 79283 event pairs, 2732 based on Foata normal form. 2/12317 useless extension candidates. Maximal degree in co-relation 78236. Up to 10759 conditions per place. [2024-06-27 19:11:01,581 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 325 selfloop transitions, 182 changer transitions 0/514 dead transitions. [2024-06-27 19:11:01,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 514 transitions, 9160 flow [2024-06-27 19:11:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:11:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:11:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 19:11:01,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47282608695652173 [2024-06-27 19:11:01,582 INFO L175 Difference]: Start difference. First operand has 370 places, 483 transitions, 7656 flow. Second operand 8 states and 174 transitions. [2024-06-27 19:11:01,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 514 transitions, 9160 flow [2024-06-27 19:11:04,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 514 transitions, 8930 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 19:11:04,188 INFO L231 Difference]: Finished difference. Result has 368 places, 483 transitions, 7796 flow [2024-06-27 19:11:04,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7426, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7796, PETRI_PLACES=368, PETRI_TRANSITIONS=483} [2024-06-27 19:11:04,188 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 318 predicate places. [2024-06-27 19:11:04,188 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 483 transitions, 7796 flow [2024-06-27 19:11:04,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:04,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:04,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:04,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:11:04,189 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:04,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:04,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1806648934, now seen corresponding path program 19 times [2024-06-27 19:11:04,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:04,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38311672] [2024-06-27 19:11:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:04,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:07,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:07,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38311672] [2024-06-27 19:11:07,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38311672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:07,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:07,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:11:07,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542798880] [2024-06-27 19:11:07,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:07,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:11:07,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:07,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:11:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:11:07,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:11:07,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 483 transitions, 7796 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:07,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:07,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:11:07,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:10,941 INFO L124 PetriNetUnfolderBase]: 7897/12308 cut-off events. [2024-06-27 19:11:10,941 INFO L125 PetriNetUnfolderBase]: For 392904/392904 co-relation queries the response was YES. [2024-06-27 19:11:11,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78570 conditions, 12308 events. 7897/12308 cut-off events. For 392904/392904 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 79120 event pairs, 2787 based on Foata normal form. 2/12308 useless extension candidates. Maximal degree in co-relation 78398. Up to 11292 conditions per place. [2024-06-27 19:11:11,292 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 429 selfloop transitions, 77 changer transitions 0/513 dead transitions. [2024-06-27 19:11:11,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 513 transitions, 8923 flow [2024-06-27 19:11:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:11:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:11:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 19:11:11,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2024-06-27 19:11:11,294 INFO L175 Difference]: Start difference. First operand has 368 places, 483 transitions, 7796 flow. Second operand 8 states and 168 transitions. [2024-06-27 19:11:11,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 513 transitions, 8923 flow [2024-06-27 19:11:13,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 513 transitions, 8408 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 19:11:13,824 INFO L231 Difference]: Finished difference. Result has 368 places, 483 transitions, 7447 flow [2024-06-27 19:11:13,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7281, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7447, PETRI_PLACES=368, PETRI_TRANSITIONS=483} [2024-06-27 19:11:13,828 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 318 predicate places. [2024-06-27 19:11:13,828 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 483 transitions, 7447 flow [2024-06-27 19:11:13,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:13,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:13,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:13,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:11:13,829 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:13,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1812968284, now seen corresponding path program 20 times [2024-06-27 19:11:13,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:13,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631541913] [2024-06-27 19:11:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:13,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:17,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:17,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631541913] [2024-06-27 19:11:17,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631541913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:17,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:17,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:11:17,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352230623] [2024-06-27 19:11:17,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:17,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:11:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:17,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:11:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:11:17,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:11:17,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 483 transitions, 7447 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:17,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:17,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:11:17,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:21,218 INFO L124 PetriNetUnfolderBase]: 7913/12348 cut-off events. [2024-06-27 19:11:21,218 INFO L125 PetriNetUnfolderBase]: For 395123/395123 co-relation queries the response was YES. [2024-06-27 19:11:21,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77756 conditions, 12348 events. 7913/12348 cut-off events. For 395123/395123 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 79553 event pairs, 2784 based on Foata normal form. 2/12348 useless extension candidates. Maximal degree in co-relation 77584. Up to 10919 conditions per place. [2024-06-27 19:11:21,426 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 363 selfloop transitions, 176 changer transitions 0/546 dead transitions. [2024-06-27 19:11:21,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 546 transitions, 9005 flow [2024-06-27 19:11:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:11:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:11:21,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-27 19:11:21,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45819397993311034 [2024-06-27 19:11:21,428 INFO L175 Difference]: Start difference. First operand has 368 places, 483 transitions, 7447 flow. Second operand 13 states and 274 transitions. [2024-06-27 19:11:21,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 546 transitions, 9005 flow [2024-06-27 19:11:23,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 546 transitions, 8567 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-27 19:11:23,695 INFO L231 Difference]: Finished difference. Result has 371 places, 486 transitions, 7421 flow [2024-06-27 19:11:23,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7012, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7421, PETRI_PLACES=371, PETRI_TRANSITIONS=486} [2024-06-27 19:11:23,696 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 321 predicate places. [2024-06-27 19:11:23,696 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 486 transitions, 7421 flow [2024-06-27 19:11:23,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:23,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:23,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:23,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:11:23,696 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:23,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:23,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1812958054, now seen corresponding path program 21 times [2024-06-27 19:11:23,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:23,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078592682] [2024-06-27 19:11:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:23,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:26,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:26,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078592682] [2024-06-27 19:11:26,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078592682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:26,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:26,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:11:26,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568414945] [2024-06-27 19:11:26,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:26,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:11:26,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:11:26,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:11:26,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:11:26,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 486 transitions, 7421 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:26,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:26,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:11:26,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:30,200 INFO L124 PetriNetUnfolderBase]: 7907/12340 cut-off events. [2024-06-27 19:11:30,200 INFO L125 PetriNetUnfolderBase]: For 390019/390019 co-relation queries the response was YES. [2024-06-27 19:11:30,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77532 conditions, 12340 events. 7907/12340 cut-off events. For 390019/390019 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 79520 event pairs, 2784 based on Foata normal form. 2/12340 useless extension candidates. Maximal degree in co-relation 77360. Up to 10914 conditions per place. [2024-06-27 19:11:30,431 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 364 selfloop transitions, 169 changer transitions 0/540 dead transitions. [2024-06-27 19:11:30,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 540 transitions, 8895 flow [2024-06-27 19:11:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:11:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:11:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-27 19:11:30,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4601449275362319 [2024-06-27 19:11:30,433 INFO L175 Difference]: Start difference. First operand has 371 places, 486 transitions, 7421 flow. Second operand 12 states and 254 transitions. [2024-06-27 19:11:30,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 540 transitions, 8895 flow [2024-06-27 19:11:32,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 540 transitions, 8425 flow, removed 22 selfloop flow, removed 13 redundant places. [2024-06-27 19:11:32,395 INFO L231 Difference]: Finished difference. Result has 370 places, 486 transitions, 7301 flow [2024-06-27 19:11:32,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6953, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7301, PETRI_PLACES=370, PETRI_TRANSITIONS=486} [2024-06-27 19:11:32,396 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 320 predicate places. [2024-06-27 19:11:32,396 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 486 transitions, 7301 flow [2024-06-27 19:11:32,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:32,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:32,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:32,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:11:32,396 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:32,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:32,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1504093496, now seen corresponding path program 22 times [2024-06-27 19:11:32,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:32,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392530060] [2024-06-27 19:11:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:32,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:35,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:35,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392530060] [2024-06-27 19:11:35,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392530060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:35,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:35,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:11:35,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222191421] [2024-06-27 19:11:35,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:35,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:11:35,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:35,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:11:35,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:11:35,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:11:35,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 486 transitions, 7301 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:35,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:35,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:11:35,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:39,359 INFO L124 PetriNetUnfolderBase]: 7901/12332 cut-off events. [2024-06-27 19:11:39,359 INFO L125 PetriNetUnfolderBase]: For 379545/379545 co-relation queries the response was YES. [2024-06-27 19:11:39,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77073 conditions, 12332 events. 7901/12332 cut-off events. For 379545/379545 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 79416 event pairs, 2790 based on Foata normal form. 2/12332 useless extension candidates. Maximal degree in co-relation 76901. Up to 10909 conditions per place. [2024-06-27 19:11:39,560 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 352 selfloop transitions, 169 changer transitions 0/528 dead transitions. [2024-06-27 19:11:39,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 528 transitions, 8509 flow [2024-06-27 19:11:39,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:11:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:11:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 19:11:39,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46304347826086956 [2024-06-27 19:11:39,562 INFO L175 Difference]: Start difference. First operand has 370 places, 486 transitions, 7301 flow. Second operand 10 states and 213 transitions. [2024-06-27 19:11:39,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 528 transitions, 8509 flow [2024-06-27 19:11:41,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 528 transitions, 8097 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-27 19:11:41,388 INFO L231 Difference]: Finished difference. Result has 368 places, 486 transitions, 7237 flow [2024-06-27 19:11:41,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6889, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7237, PETRI_PLACES=368, PETRI_TRANSITIONS=486} [2024-06-27 19:11:41,389 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 318 predicate places. [2024-06-27 19:11:41,389 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 486 transitions, 7237 flow [2024-06-27 19:11:41,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:41,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:41,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:41,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:11:41,390 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:41,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1287966211, now seen corresponding path program 1 times [2024-06-27 19:11:41,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:41,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519238736] [2024-06-27 19:11:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:41,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:44,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:44,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519238736] [2024-06-27 19:11:44,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519238736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:44,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:44,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:11:44,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260956702] [2024-06-27 19:11:44,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:44,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:11:44,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:44,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:11:44,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:11:44,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:11:44,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 486 transitions, 7237 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:44,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:44,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:11:44,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:48,751 INFO L124 PetriNetUnfolderBase]: 8264/12919 cut-off events. [2024-06-27 19:11:48,751 INFO L125 PetriNetUnfolderBase]: For 471425/471425 co-relation queries the response was YES. [2024-06-27 19:11:48,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82441 conditions, 12919 events. 8264/12919 cut-off events. For 471425/471425 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 84034 event pairs, 2461 based on Foata normal form. 6/12923 useless extension candidates. Maximal degree in co-relation 82269. Up to 10255 conditions per place. [2024-06-27 19:11:48,984 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 485 selfloop transitions, 74 changer transitions 0/566 dead transitions. [2024-06-27 19:11:48,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 566 transitions, 9234 flow [2024-06-27 19:11:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:11:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:11:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-27 19:11:48,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5239130434782608 [2024-06-27 19:11:48,986 INFO L175 Difference]: Start difference. First operand has 368 places, 486 transitions, 7237 flow. Second operand 10 states and 241 transitions. [2024-06-27 19:11:48,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 566 transitions, 9234 flow [2024-06-27 19:11:51,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 566 transitions, 8844 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 19:11:51,013 INFO L231 Difference]: Finished difference. Result has 367 places, 489 transitions, 7077 flow [2024-06-27 19:11:51,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6851, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7077, PETRI_PLACES=367, PETRI_TRANSITIONS=489} [2024-06-27 19:11:51,014 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 317 predicate places. [2024-06-27 19:11:51,014 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 489 transitions, 7077 flow [2024-06-27 19:11:51,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:51,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:51,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:51,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:11:51,015 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:51,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash -969822709, now seen corresponding path program 2 times [2024-06-27 19:11:51,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:51,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646289649] [2024-06-27 19:11:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:51,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:54,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:54,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646289649] [2024-06-27 19:11:54,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646289649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:54,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:54,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:11:54,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932698854] [2024-06-27 19:11:54,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:54,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:11:54,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:54,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:11:54,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:11:54,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:11:54,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 489 transitions, 7077 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:54,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:54,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:11:54,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:59,022 INFO L124 PetriNetUnfolderBase]: 8251/12900 cut-off events. [2024-06-27 19:11:59,022 INFO L125 PetriNetUnfolderBase]: For 445817/445817 co-relation queries the response was YES. [2024-06-27 19:11:59,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81890 conditions, 12900 events. 8251/12900 cut-off events. For 445817/445817 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 83997 event pairs, 2581 based on Foata normal form. 6/12904 useless extension candidates. Maximal degree in co-relation 81718. Up to 11528 conditions per place. [2024-06-27 19:11:59,234 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 480 selfloop transitions, 60 changer transitions 0/547 dead transitions. [2024-06-27 19:11:59,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 547 transitions, 8410 flow [2024-06-27 19:11:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:11:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:11:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:11:59,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048309178743962 [2024-06-27 19:11:59,236 INFO L175 Difference]: Start difference. First operand has 367 places, 489 transitions, 7077 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:11:59,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 547 transitions, 8410 flow [2024-06-27 19:12:01,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 547 transitions, 8325 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:12:01,333 INFO L231 Difference]: Finished difference. Result has 371 places, 489 transitions, 7118 flow [2024-06-27 19:12:01,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6992, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7118, PETRI_PLACES=371, PETRI_TRANSITIONS=489} [2024-06-27 19:12:01,334 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 321 predicate places. [2024-06-27 19:12:01,334 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 489 transitions, 7118 flow [2024-06-27 19:12:01,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:01,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:01,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:01,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:12:01,336 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:01,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:01,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1770954251, now seen corresponding path program 3 times [2024-06-27 19:12:01,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:01,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001369621] [2024-06-27 19:12:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:01,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:05,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:05,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001369621] [2024-06-27 19:12:05,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001369621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:05,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:05,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:12:05,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683627187] [2024-06-27 19:12:05,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:05,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:12:05,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:05,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:12:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:12:05,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:12:05,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 489 transitions, 7118 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:05,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:05,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:12:05,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:09,547 INFO L124 PetriNetUnfolderBase]: 8387/13100 cut-off events. [2024-06-27 19:12:09,547 INFO L125 PetriNetUnfolderBase]: For 464663/464663 co-relation queries the response was YES. [2024-06-27 19:12:09,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83319 conditions, 13100 events. 8387/13100 cut-off events. For 464663/464663 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 85547 event pairs, 3031 based on Foata normal form. 8/13106 useless extension candidates. Maximal degree in co-relation 83145. Up to 11229 conditions per place. [2024-06-27 19:12:09,725 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 491 selfloop transitions, 55 changer transitions 0/553 dead transitions. [2024-06-27 19:12:09,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 553 transitions, 8770 flow [2024-06-27 19:12:09,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:12:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:12:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-27 19:12:09,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144927536231884 [2024-06-27 19:12:09,726 INFO L175 Difference]: Start difference. First operand has 371 places, 489 transitions, 7118 flow. Second operand 9 states and 213 transitions. [2024-06-27 19:12:09,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 553 transitions, 8770 flow [2024-06-27 19:12:11,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 553 transitions, 8561 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 19:12:11,901 INFO L231 Difference]: Finished difference. Result has 371 places, 490 transitions, 7045 flow [2024-06-27 19:12:11,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6909, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7045, PETRI_PLACES=371, PETRI_TRANSITIONS=490} [2024-06-27 19:12:11,902 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 321 predicate places. [2024-06-27 19:12:11,902 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 490 transitions, 7045 flow [2024-06-27 19:12:11,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:11,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:11,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:11,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:12:11,903 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:11,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:11,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1778572811, now seen corresponding path program 4 times [2024-06-27 19:12:11,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:11,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500873757] [2024-06-27 19:12:11,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:11,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:15,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:15,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500873757] [2024-06-27 19:12:15,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500873757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:15,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:15,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:12:15,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008019827] [2024-06-27 19:12:15,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:15,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:12:15,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:15,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:12:15,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:12:15,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:12:15,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 490 transitions, 7045 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:15,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:15,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:12:15,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:18,938 INFO L124 PetriNetUnfolderBase]: 8369/13090 cut-off events. [2024-06-27 19:12:18,938 INFO L125 PetriNetUnfolderBase]: For 432546/432546 co-relation queries the response was YES. [2024-06-27 19:12:19,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81888 conditions, 13090 events. 8369/13090 cut-off events. For 432546/432546 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 85744 event pairs, 3140 based on Foata normal form. 8/13096 useless extension candidates. Maximal degree in co-relation 81714. Up to 11927 conditions per place. [2024-06-27 19:12:19,134 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 480 selfloop transitions, 52 changer transitions 0/539 dead transitions. [2024-06-27 19:12:19,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 539 transitions, 8352 flow [2024-06-27 19:12:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:12:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:12:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:12:19,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830917874396135 [2024-06-27 19:12:19,135 INFO L175 Difference]: Start difference. First operand has 371 places, 490 transitions, 7045 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:12:19,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 539 transitions, 8352 flow [2024-06-27 19:12:20,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 539 transitions, 8202 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:12:20,949 INFO L231 Difference]: Finished difference. Result has 372 places, 490 transitions, 7004 flow [2024-06-27 19:12:20,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6895, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7004, PETRI_PLACES=372, PETRI_TRANSITIONS=490} [2024-06-27 19:12:20,950 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 322 predicate places. [2024-06-27 19:12:20,950 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 490 transitions, 7004 flow [2024-06-27 19:12:20,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:20,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:20,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:20,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:12:20,951 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:20,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash 896618925, now seen corresponding path program 5 times [2024-06-27 19:12:20,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:20,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375627195] [2024-06-27 19:12:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:20,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:24,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:24,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375627195] [2024-06-27 19:12:24,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375627195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:24,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:24,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:12:24,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876952921] [2024-06-27 19:12:24,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:24,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:12:24,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:24,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:12:24,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:12:24,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:12:24,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 490 transitions, 7004 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:24,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:24,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:12:24,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:28,325 INFO L124 PetriNetUnfolderBase]: 8659/13525 cut-off events. [2024-06-27 19:12:28,326 INFO L125 PetriNetUnfolderBase]: For 474951/474951 co-relation queries the response was YES. [2024-06-27 19:12:28,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85386 conditions, 13525 events. 8659/13525 cut-off events. For 474951/474951 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 89099 event pairs, 3170 based on Foata normal form. 8/13529 useless extension candidates. Maximal degree in co-relation 85212. Up to 11703 conditions per place. [2024-06-27 19:12:28,546 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 439 selfloop transitions, 106 changer transitions 0/552 dead transitions. [2024-06-27 19:12:28,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 552 transitions, 8674 flow [2024-06-27 19:12:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:12:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:12:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-27 19:12:28,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144927536231884 [2024-06-27 19:12:28,548 INFO L175 Difference]: Start difference. First operand has 372 places, 490 transitions, 7004 flow. Second operand 9 states and 213 transitions. [2024-06-27 19:12:28,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 552 transitions, 8674 flow [2024-06-27 19:12:30,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 552 transitions, 8528 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:12:30,801 INFO L231 Difference]: Finished difference. Result has 372 places, 492 transitions, 7124 flow [2024-06-27 19:12:30,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7124, PETRI_PLACES=372, PETRI_TRANSITIONS=492} [2024-06-27 19:12:30,802 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 322 predicate places. [2024-06-27 19:12:30,802 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 492 transitions, 7124 flow [2024-06-27 19:12:30,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:30,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:30,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:30,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:12:30,802 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:30,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:30,803 INFO L85 PathProgramCache]: Analyzing trace with hash 904237485, now seen corresponding path program 6 times [2024-06-27 19:12:30,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:30,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707823205] [2024-06-27 19:12:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:30,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:34,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:34,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707823205] [2024-06-27 19:12:34,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707823205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:34,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:34,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:12:34,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190148573] [2024-06-27 19:12:34,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:34,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:12:34,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:12:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:12:34,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:12:34,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 492 transitions, 7124 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:34,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:34,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:12:34,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:38,397 INFO L124 PetriNetUnfolderBase]: 8795/13757 cut-off events. [2024-06-27 19:12:38,397 INFO L125 PetriNetUnfolderBase]: For 491160/491160 co-relation queries the response was YES. [2024-06-27 19:12:38,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87002 conditions, 13757 events. 8795/13757 cut-off events. For 491160/491160 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 91157 event pairs, 3320 based on Foata normal form. 8/13761 useless extension candidates. Maximal degree in co-relation 86828. Up to 12361 conditions per place. [2024-06-27 19:12:38,609 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 427 selfloop transitions, 105 changer transitions 0/539 dead transitions. [2024-06-27 19:12:38,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 539 transitions, 8449 flow [2024-06-27 19:12:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:12:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:12:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:12:38,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830917874396135 [2024-06-27 19:12:38,610 INFO L175 Difference]: Start difference. First operand has 372 places, 492 transitions, 7124 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:12:38,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 539 transitions, 8449 flow [2024-06-27 19:12:40,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 539 transitions, 8302 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:12:40,752 INFO L231 Difference]: Finished difference. Result has 376 places, 493 transitions, 7220 flow [2024-06-27 19:12:40,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6983, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7220, PETRI_PLACES=376, PETRI_TRANSITIONS=493} [2024-06-27 19:12:40,753 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 326 predicate places. [2024-06-27 19:12:40,753 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 493 transitions, 7220 flow [2024-06-27 19:12:40,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:40,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:40,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:40,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:12:40,753 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:40,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:40,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1162525455, now seen corresponding path program 7 times [2024-06-27 19:12:40,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:40,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071994359] [2024-06-27 19:12:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:40,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:44,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:44,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071994359] [2024-06-27 19:12:44,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071994359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:44,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:44,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:12:44,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103170005] [2024-06-27 19:12:44,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:44,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:12:44,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:44,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:12:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:12:44,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:12:44,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 493 transitions, 7220 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:44,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:44,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:12:44,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:48,812 INFO L124 PetriNetUnfolderBase]: 8931/13973 cut-off events. [2024-06-27 19:12:48,812 INFO L125 PetriNetUnfolderBase]: For 498259/498259 co-relation queries the response was YES. [2024-06-27 19:12:48,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88375 conditions, 13973 events. 8931/13973 cut-off events. For 498259/498259 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 92934 event pairs, 3366 based on Foata normal form. 8/13977 useless extension candidates. Maximal degree in co-relation 88199. Up to 12561 conditions per place. [2024-06-27 19:12:49,016 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 425 selfloop transitions, 104 changer transitions 0/536 dead transitions. [2024-06-27 19:12:49,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 536 transitions, 8521 flow [2024-06-27 19:12:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:12:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:12:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-27 19:12:49,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47342995169082125 [2024-06-27 19:12:49,018 INFO L175 Difference]: Start difference. First operand has 376 places, 493 transitions, 7220 flow. Second operand 9 states and 196 transitions. [2024-06-27 19:12:49,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 536 transitions, 8521 flow [2024-06-27 19:12:51,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 536 transitions, 8312 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:12:51,690 INFO L231 Difference]: Finished difference. Result has 378 places, 494 transitions, 7248 flow [2024-06-27 19:12:51,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7011, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7248, PETRI_PLACES=378, PETRI_TRANSITIONS=494} [2024-06-27 19:12:51,690 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 328 predicate places. [2024-06-27 19:12:51,690 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 494 transitions, 7248 flow [2024-06-27 19:12:51,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:51,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:51,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:51,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:12:51,691 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:51,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:51,691 INFO L85 PathProgramCache]: Analyzing trace with hash 945840779, now seen corresponding path program 8 times [2024-06-27 19:12:51,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:51,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281061059] [2024-06-27 19:12:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:51,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:55,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:55,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281061059] [2024-06-27 19:12:55,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281061059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:55,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:55,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:12:55,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236862545] [2024-06-27 19:12:55,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:55,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:12:55,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:55,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:12:55,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:12:55,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:12:55,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 494 transitions, 7248 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:55,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:55,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:12:55,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:58,979 INFO L124 PetriNetUnfolderBase]: 9067/14194 cut-off events. [2024-06-27 19:12:58,979 INFO L125 PetriNetUnfolderBase]: For 511206/511206 co-relation queries the response was YES. [2024-06-27 19:12:59,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90058 conditions, 14194 events. 9067/14194 cut-off events. For 511206/511206 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 94795 event pairs, 3401 based on Foata normal form. 8/14200 useless extension candidates. Maximal degree in co-relation 89881. Up to 12974 conditions per place. [2024-06-27 19:12:59,183 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 479 selfloop transitions, 48 changer transitions 0/534 dead transitions. [2024-06-27 19:12:59,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 534 transitions, 8538 flow [2024-06-27 19:12:59,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:12:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:12:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:12:59,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2024-06-27 19:12:59,185 INFO L175 Difference]: Start difference. First operand has 378 places, 494 transitions, 7248 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:12:59,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 534 transitions, 8538 flow [2024-06-27 19:13:01,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 534 transitions, 8329 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:13:01,223 INFO L231 Difference]: Finished difference. Result has 380 places, 495 transitions, 7166 flow [2024-06-27 19:13:01,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7039, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7166, PETRI_PLACES=380, PETRI_TRANSITIONS=495} [2024-06-27 19:13:01,224 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 330 predicate places. [2024-06-27 19:13:01,224 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 495 transitions, 7166 flow [2024-06-27 19:13:01,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:01,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:01,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:01,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:13:01,225 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:13:01,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:01,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1073875375, now seen corresponding path program 1 times [2024-06-27 19:13:01,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:01,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689451310] [2024-06-27 19:13:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:01,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:13:04,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:04,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689451310] [2024-06-27 19:13:04,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689451310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:04,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:04,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:13:04,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875166274] [2024-06-27 19:13:04,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:04,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:13:04,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:04,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:13:04,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:13:04,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:13:04,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 495 transitions, 7166 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:04,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:04,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:13:04,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:08,415 INFO L124 PetriNetUnfolderBase]: 9276/14514 cut-off events. [2024-06-27 19:13:08,416 INFO L125 PetriNetUnfolderBase]: For 545571/545571 co-relation queries the response was YES. [2024-06-27 19:13:08,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92845 conditions, 14514 events. 9276/14514 cut-off events. For 545571/545571 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 97244 event pairs, 3324 based on Foata normal form. 6/14516 useless extension candidates. Maximal degree in co-relation 92667. Up to 10623 conditions per place. [2024-06-27 19:13:08,607 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 439 selfloop transitions, 119 changer transitions 0/565 dead transitions. [2024-06-27 19:13:08,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 565 transitions, 9117 flow [2024-06-27 19:13:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:13:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:13:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-27 19:13:08,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314009661835749 [2024-06-27 19:13:08,609 INFO L175 Difference]: Start difference. First operand has 380 places, 495 transitions, 7166 flow. Second operand 9 states and 220 transitions. [2024-06-27 19:13:08,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 565 transitions, 9117 flow [2024-06-27 19:13:10,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 565 transitions, 9018 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:13:10,736 INFO L231 Difference]: Finished difference. Result has 382 places, 497 transitions, 7363 flow [2024-06-27 19:13:10,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7067, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7363, PETRI_PLACES=382, PETRI_TRANSITIONS=497} [2024-06-27 19:13:10,736 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 332 predicate places. [2024-06-27 19:13:10,737 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 497 transitions, 7363 flow [2024-06-27 19:13:10,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:10,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:10,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:10,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:13:10,737 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:13:10,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1074144145, now seen corresponding path program 2 times [2024-06-27 19:13:10,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:10,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515888325] [2024-06-27 19:13:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:10,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:13:14,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:14,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515888325] [2024-06-27 19:13:14,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515888325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:14,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:14,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:13:14,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068671345] [2024-06-27 19:13:14,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:14,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:13:14,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:14,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:13:14,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:13:14,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:13:14,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 497 transitions, 7363 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:14,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:14,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:13:14,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:17,968 INFO L124 PetriNetUnfolderBase]: 9374/14639 cut-off events. [2024-06-27 19:13:17,968 INFO L125 PetriNetUnfolderBase]: For 562464/562464 co-relation queries the response was YES. [2024-06-27 19:13:18,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94998 conditions, 14639 events. 9374/14639 cut-off events. For 562464/562464 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 97660 event pairs, 3221 based on Foata normal form. 6/14641 useless extension candidates. Maximal degree in co-relation 94819. Up to 10671 conditions per place. [2024-06-27 19:13:18,169 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 436 selfloop transitions, 119 changer transitions 0/562 dead transitions. [2024-06-27 19:13:18,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 562 transitions, 9090 flow [2024-06-27 19:13:18,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:13:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:13:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 19:13:18,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-27 19:13:18,171 INFO L175 Difference]: Start difference. First operand has 382 places, 497 transitions, 7363 flow. Second operand 9 states and 216 transitions. [2024-06-27 19:13:18,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 562 transitions, 9090 flow [2024-06-27 19:13:20,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 562 transitions, 8824 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:13:20,473 INFO L231 Difference]: Finished difference. Result has 385 places, 498 transitions, 7367 flow [2024-06-27 19:13:20,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7367, PETRI_PLACES=385, PETRI_TRANSITIONS=498} [2024-06-27 19:13:20,474 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 335 predicate places. [2024-06-27 19:13:20,474 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 498 transitions, 7367 flow [2024-06-27 19:13:20,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:20,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:20,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:20,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:13:20,475 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:13:20,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1074144486, now seen corresponding path program 1 times [2024-06-27 19:13:20,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:20,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990952156] [2024-06-27 19:13:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:20,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:13:23,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:23,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990952156] [2024-06-27 19:13:23,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990952156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:23,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:23,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:13:23,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869149551] [2024-06-27 19:13:23,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:23,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:13:23,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:23,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:13:23,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:13:23,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:13:23,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 498 transitions, 7367 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:23,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:23,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:13:23,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:28,003 INFO L124 PetriNetUnfolderBase]: 9643/15050 cut-off events. [2024-06-27 19:13:28,003 INFO L125 PetriNetUnfolderBase]: For 636415/636415 co-relation queries the response was YES. [2024-06-27 19:13:28,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98149 conditions, 15050 events. 9643/15050 cut-off events. For 636415/636415 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 101090 event pairs, 3615 based on Foata normal form. 8/15054 useless extension candidates. Maximal degree in co-relation 97969. Up to 13309 conditions per place. [2024-06-27 19:13:28,219 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 476 selfloop transitions, 95 changer transitions 0/578 dead transitions. [2024-06-27 19:13:28,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 578 transitions, 9325 flow [2024-06-27 19:13:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:13:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:13:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-27 19:13:28,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4841897233201581 [2024-06-27 19:13:28,220 INFO L175 Difference]: Start difference. First operand has 385 places, 498 transitions, 7367 flow. Second operand 11 states and 245 transitions. [2024-06-27 19:13:28,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 578 transitions, 9325 flow [2024-06-27 19:13:30,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 578 transitions, 9119 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:13:30,767 INFO L231 Difference]: Finished difference. Result has 392 places, 512 transitions, 7690 flow [2024-06-27 19:13:30,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7169, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7690, PETRI_PLACES=392, PETRI_TRANSITIONS=512} [2024-06-27 19:13:30,768 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 342 predicate places. [2024-06-27 19:13:30,768 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 512 transitions, 7690 flow [2024-06-27 19:13:30,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:30,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:30,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:30,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:13:30,769 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:13:30,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1162710246, now seen corresponding path program 2 times [2024-06-27 19:13:30,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:30,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897281235] [2024-06-27 19:13:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:13:33,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897281235] [2024-06-27 19:13:33,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897281235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:33,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:33,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:13:33,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663518872] [2024-06-27 19:13:33,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:33,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:13:33,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:13:33,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:13:33,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:13:33,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 512 transitions, 7690 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:33,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:33,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:13:33,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:38,309 INFO L124 PetriNetUnfolderBase]: 9912/15451 cut-off events. [2024-06-27 19:13:38,309 INFO L125 PetriNetUnfolderBase]: For 713021/713021 co-relation queries the response was YES. [2024-06-27 19:13:38,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101802 conditions, 15451 events. 9912/15451 cut-off events. For 713021/713021 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 104130 event pairs, 3742 based on Foata normal form. 8/15455 useless extension candidates. Maximal degree in co-relation 101619. Up to 13921 conditions per place. [2024-06-27 19:13:38,530 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 478 selfloop transitions, 90 changer transitions 0/575 dead transitions. [2024-06-27 19:13:38,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 575 transitions, 9411 flow [2024-06-27 19:13:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:13:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:13:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-27 19:13:38,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 19:13:38,532 INFO L175 Difference]: Start difference. First operand has 392 places, 512 transitions, 7690 flow. Second operand 12 states and 253 transitions. [2024-06-27 19:13:38,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 575 transitions, 9411 flow [2024-06-27 19:13:41,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 575 transitions, 9216 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 19:13:41,565 INFO L231 Difference]: Finished difference. Result has 399 places, 517 transitions, 7816 flow [2024-06-27 19:13:41,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7511, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7816, PETRI_PLACES=399, PETRI_TRANSITIONS=517} [2024-06-27 19:13:41,565 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 349 predicate places. [2024-06-27 19:13:41,565 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 517 transitions, 7816 flow [2024-06-27 19:13:41,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:41,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:41,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:41,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:13:41,566 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:13:41,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1162709905, now seen corresponding path program 3 times [2024-06-27 19:13:41,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:41,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153526216] [2024-06-27 19:13:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:41,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:13:45,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:45,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153526216] [2024-06-27 19:13:45,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153526216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:45,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:45,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:13:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978398301] [2024-06-27 19:13:45,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:45,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:13:45,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:45,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:13:45,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:13:45,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:13:45,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 517 transitions, 7816 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:45,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:45,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:13:45,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:50,179 INFO L124 PetriNetUnfolderBase]: 10010/15654 cut-off events. [2024-06-27 19:13:50,190 INFO L125 PetriNetUnfolderBase]: For 710372/710372 co-relation queries the response was YES. [2024-06-27 19:13:50,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102959 conditions, 15654 events. 10010/15654 cut-off events. For 710372/710372 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 106136 event pairs, 3809 based on Foata normal form. 6/15656 useless extension candidates. Maximal degree in co-relation 102773. Up to 13715 conditions per place. [2024-06-27 19:13:50,394 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 452 selfloop transitions, 110 changer transitions 0/569 dead transitions. [2024-06-27 19:13:50,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 569 transitions, 9273 flow [2024-06-27 19:13:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:13:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:13:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:13:50,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49033816425120774 [2024-06-27 19:13:50,395 INFO L175 Difference]: Start difference. First operand has 399 places, 517 transitions, 7816 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:13:50,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 569 transitions, 9273 flow [2024-06-27 19:13:53,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 569 transitions, 9126 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 19:13:53,376 INFO L231 Difference]: Finished difference. Result has 400 places, 518 transitions, 7917 flow [2024-06-27 19:13:53,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7671, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7917, PETRI_PLACES=400, PETRI_TRANSITIONS=518} [2024-06-27 19:13:53,376 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 350 predicate places. [2024-06-27 19:13:53,376 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 518 transitions, 7917 flow [2024-06-27 19:13:53,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:53,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:53,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:53,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:13:53,377 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:13:53,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:53,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1386975618, now seen corresponding path program 3 times [2024-06-27 19:13:53,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:53,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974280687] [2024-06-27 19:13:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:53,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:13:56,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:56,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974280687] [2024-06-27 19:13:56,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974280687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:56,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:56,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:13:56,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316562726] [2024-06-27 19:13:56,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:56,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:13:56,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:56,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:13:56,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:13:56,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:13:56,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 518 transitions, 7917 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:56,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:56,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:13:56,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:14:01,676 INFO L124 PetriNetUnfolderBase]: 9987/15593 cut-off events. [2024-06-27 19:14:01,676 INFO L125 PetriNetUnfolderBase]: For 687113/687113 co-relation queries the response was YES. [2024-06-27 19:14:01,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102009 conditions, 15593 events. 9987/15593 cut-off events. For 687113/687113 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 105447 event pairs, 3841 based on Foata normal form. 10/15599 useless extension candidates. Maximal degree in co-relation 101821. Up to 14188 conditions per place. [2024-06-27 19:14:01,884 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 474 selfloop transitions, 86 changer transitions 0/567 dead transitions. [2024-06-27 19:14:01,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 567 transitions, 9276 flow [2024-06-27 19:14:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:14:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:14:01,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-27 19:14:01,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525691699604743 [2024-06-27 19:14:01,886 INFO L175 Difference]: Start difference. First operand has 400 places, 518 transitions, 7917 flow. Second operand 11 states and 229 transitions. [2024-06-27 19:14:01,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 567 transitions, 9276 flow [2024-06-27 19:14:04,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 567 transitions, 9027 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:14:04,595 INFO L231 Difference]: Finished difference. Result has 404 places, 519 transitions, 7874 flow [2024-06-27 19:14:04,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7678, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7874, PETRI_PLACES=404, PETRI_TRANSITIONS=519} [2024-06-27 19:14:04,595 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 354 predicate places. [2024-06-27 19:14:04,595 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 519 transitions, 7874 flow [2024-06-27 19:14:04,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:14:04,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:14:04,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:14:04,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:14:04,596 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:14:04,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:14:04,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1481064738, now seen corresponding path program 4 times [2024-06-27 19:14:04,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:14:04,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424670388] [2024-06-27 19:14:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:14:04,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:14:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:14:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:14:08,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:14:08,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424670388] [2024-06-27 19:14:08,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424670388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:14:08,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:14:08,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:14:08,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359902011] [2024-06-27 19:14:08,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:14:08,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:14:08,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:14:08,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:14:08,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:14:08,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-27 19:14:08,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 519 transitions, 7874 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:14:08,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:14:08,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-27 19:14:08,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:14:13,490 INFO L124 PetriNetUnfolderBase]: 10539/16422 cut-off events. [2024-06-27 19:14:13,491 INFO L125 PetriNetUnfolderBase]: For 903134/903134 co-relation queries the response was YES. [2024-06-27 19:14:13,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106243 conditions, 16422 events. 10539/16422 cut-off events. For 903134/903134 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 111885 event pairs, 4037 based on Foata normal form. 44/16464 useless extension candidates. Maximal degree in co-relation 106054. Up to 14363 conditions per place. [2024-06-27 19:14:13,710 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 470 selfloop transitions, 96 changer transitions 0/573 dead transitions. [2024-06-27 19:14:13,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 573 transitions, 9325 flow [2024-06-27 19:14:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:14:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:14:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-27 19:14:13,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447463768115942 [2024-06-27 19:14:13,712 INFO L175 Difference]: Start difference. First operand has 404 places, 519 transitions, 7874 flow. Second operand 12 states and 247 transitions. [2024-06-27 19:14:13,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 573 transitions, 9325 flow Killed by 15