./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe019_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe019_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe019_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:44:57,312 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:44:57,379 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:44:57,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:44:57,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:44:57,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:44:57,421 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:44:57,422 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:44:57,422 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:44:57,423 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:44:57,423 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:44:57,423 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:44:57,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:44:57,424 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:44:57,424 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:44:57,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:44:57,425 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:44:57,425 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:44:57,425 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:44:57,425 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:44:57,426 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:44:57,429 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:44:57,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:44:57,429 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:44:57,430 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:44:57,430 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:44:57,430 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:44:57,430 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:44:57,430 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:44:57,431 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:44:57,431 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:44:57,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:44:57,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:44:57,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:44:57,432 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:44:57,432 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:44:57,441 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:44:57,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:44:57,441 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:44:57,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:44:57,442 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:44:57,442 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:44:57,442 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:44:57,442 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:44:57,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:44:57,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:44:57,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:44:57,651 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:44:57,652 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:44:57,653 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe019_power.oepc.yml/witness.yml [2024-06-21 17:44:57,822 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:44:57,822 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:44:57,822 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_power.oepc.i [2024-06-21 17:44:58,841 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:44:59,057 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:44:59,058 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.oepc.i [2024-06-21 17:44:59,075 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8861f8a6f/ceaad592972247dc9276508f7b1279da/FLAG30d953e9f [2024-06-21 17:44:59,085 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8861f8a6f/ceaad592972247dc9276508f7b1279da [2024-06-21 17:44:59,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:44:59,087 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:44:59,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:44:59,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:44:59,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:44:59,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:44:57" (1/2) ... [2024-06-21 17:44:59,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8277119 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:44:59, skipping insertion in model container [2024-06-21 17:44:59,093 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:44:57" (1/2) ... [2024-06-21 17:44:59,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@78424ce7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:44:59, skipping insertion in model container [2024-06-21 17:44:59,094 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:44:59" (2/2) ... [2024-06-21 17:44:59,095 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8277119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59, skipping insertion in model container [2024-06-21 17:44:59,095 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:44:59" (2/2) ... [2024-06-21 17:44:59,095 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:44:59,240 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:44:59,241 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:44:59,242 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:44:59,242 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:44:59,242 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:44:59,242 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:44:59,243 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-21 17:44:59,278 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:44:59,584 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:44:59,592 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:44:59,755 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:44:59,796 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:44:59,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59 WrapperNode [2024-06-21 17:44:59,797 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:44:59,798 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:44:59,798 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:44:59,798 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:44:59,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:44:59,847 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:44:59,893 INFO L138 Inliner]: procedures = 176, calls = 96, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 256 [2024-06-21 17:44:59,901 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:44:59,902 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:44:59,902 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:44:59,903 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:44:59,911 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:44:59,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:44:59,920 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:44:59,954 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-21 17:44:59,955 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:44:59,955 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:44:59,966 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:44:59,981 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:44:59,986 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:44:59,994 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:44:59,999 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:45:00,001 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:45:00,001 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:45:00,001 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:45:00,002 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (1/1) ... [2024-06-21 17:45:00,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:45:00,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:45:00,037 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) [2024-06-21 17:45:00,112 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 [2024-06-21 17:45:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:45:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:45:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:45:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:45:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:45:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:45:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:45:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:45:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:45:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:45:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:45:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:45:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 17:45:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 17:45:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:45:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:45:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:45:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:45:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:45:00,157 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:45:00,280 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:45:00,282 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:45:00,775 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:45:00,775 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:45:01,187 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:45:01,187 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:45:01,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:45:01 BoogieIcfgContainer [2024-06-21 17:45:01,191 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:45:01,194 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:45:01,194 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:45:01,197 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:45:01,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:44:57" (1/4) ... [2024-06-21 17:45:01,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd924c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:45:01, skipping insertion in model container [2024-06-21 17:45:01,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:44:59" (2/4) ... [2024-06-21 17:45:01,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd924c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:45:01, skipping insertion in model container [2024-06-21 17:45:01,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:44:59" (3/4) ... [2024-06-21 17:45:01,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd924c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:45:01, skipping insertion in model container [2024-06-21 17:45:01,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:45:01" (4/4) ... [2024-06-21 17:45:01,200 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.oepc.i [2024-06-21 17:45:01,213 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:45:01,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 17:45:01,214 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:45:01,322 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:45:01,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 17:45:01,388 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 17:45:01,389 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:45:01,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:45:01,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 17:45:01,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 17:45:01,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:45:01,411 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;@27de1b18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:45:01,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 17:45:01,415 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:45:01,415 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:45:01,416 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:45:01,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:01,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:45:01,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:01,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:01,423 INFO L85 PathProgramCache]: Analyzing trace with hash 860775238, now seen corresponding path program 1 times [2024-06-21 17:45:01,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:01,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51107233] [2024-06-21 17:45:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:01,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:03,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:03,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51107233] [2024-06-21 17:45:03,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51107233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:03,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:03,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:45:03,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138207032] [2024-06-21 17:45:03,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:03,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:45:03,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:03,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:45:03,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:45:03,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 17:45:03,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:03,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:03,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 17:45:03,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:04,666 INFO L124 PetriNetUnfolderBase]: 4366/6138 cut-off events. [2024-06-21 17:45:04,666 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-21 17:45:04,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12409 conditions, 6138 events. 4366/6138 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32309 event pairs, 3068 based on Foata normal form. 1/6033 useless extension candidates. Maximal degree in co-relation 12396. Up to 6049 conditions per place. [2024-06-21 17:45:04,700 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-21 17:45:04,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 239 flow [2024-06-21 17:45:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:45:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:45:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-21 17:45:04,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-21 17:45:04,711 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 93 transitions. [2024-06-21 17:45:04,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 239 flow [2024-06-21 17:45:04,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:45:04,715 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 17:45:04,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 17:45:04,719 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 17:45:04,719 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 17:45:04,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:04,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:04,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:04,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:45:04,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:04,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1723629659, now seen corresponding path program 1 times [2024-06-21 17:45:04,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:04,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546696205] [2024-06-21 17:45:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:04,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:07,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:07,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546696205] [2024-06-21 17:45:07,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546696205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:07,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:07,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:45:07,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721685488] [2024-06-21 17:45:07,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:07,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:45:07,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:07,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:45:07,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:45:07,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 17:45:07,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:07,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:07,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 17:45:07,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:08,608 INFO L124 PetriNetUnfolderBase]: 4356/6125 cut-off events. [2024-06-21 17:45:08,608 INFO L125 PetriNetUnfolderBase]: For 1244/1254 co-relation queries the response was YES. [2024-06-21 17:45:08,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14294 conditions, 6125 events. 4356/6125 cut-off events. For 1244/1254 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32114 event pairs, 2547 based on Foata normal form. 7/6128 useless extension candidates. Maximal degree in co-relation 14282. Up to 6008 conditions per place. [2024-06-21 17:45:08,637 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 58 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-21 17:45:08,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 343 flow [2024-06-21 17:45:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:45:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:45:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-21 17:45:08,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-21 17:45:08,640 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 123 transitions. [2024-06-21 17:45:08,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 343 flow [2024-06-21 17:45:08,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:45:08,645 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 17:45:08,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 17:45:08,646 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 17:45:08,646 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 17:45:08,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:08,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:08,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:08,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:45:08,651 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:08,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:08,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1979580326, now seen corresponding path program 1 times [2024-06-21 17:45:08,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:08,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680408394] [2024-06-21 17:45:08,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:08,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:11,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:11,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680408394] [2024-06-21 17:45:11,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680408394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:11,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:11,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:45:11,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927875994] [2024-06-21 17:45:11,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:11,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:45:11,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:11,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:45:11,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:45:11,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 17:45:11,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:11,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:11,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 17:45:11,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:13,435 INFO L124 PetriNetUnfolderBase]: 5530/7706 cut-off events. [2024-06-21 17:45:13,436 INFO L125 PetriNetUnfolderBase]: For 4351/4370 co-relation queries the response was YES. [2024-06-21 17:45:13,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20107 conditions, 7706 events. 5530/7706 cut-off events. For 4351/4370 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39847 event pairs, 2395 based on Foata normal form. 14/7716 useless extension candidates. Maximal degree in co-relation 20093. Up to 7514 conditions per place. [2024-06-21 17:45:13,471 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-21 17:45:13,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 105 transitions, 528 flow [2024-06-21 17:45:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:45:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:45:13,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 17:45:13,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 17:45:13,478 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 173 transitions. [2024-06-21 17:45:13,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 105 transitions, 528 flow [2024-06-21 17:45:13,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 105 transitions, 500 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 17:45:13,483 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-21 17:45:13,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-21 17:45:13,483 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-21 17:45:13,484 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-21 17:45:13,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:13,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:13,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:13,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:45:13,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:13,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:13,485 INFO L85 PathProgramCache]: Analyzing trace with hash -481613908, now seen corresponding path program 1 times [2024-06-21 17:45:13,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:13,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14704266] [2024-06-21 17:45:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:13,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:15,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:15,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14704266] [2024-06-21 17:45:15,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14704266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:15,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:15,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:45:15,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434055827] [2024-06-21 17:45:15,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:15,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:45:15,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:15,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:45:15,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:45:15,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:15,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:15,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:15,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:15,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:17,209 INFO L124 PetriNetUnfolderBase]: 6648/9210 cut-off events. [2024-06-21 17:45:17,210 INFO L125 PetriNetUnfolderBase]: For 9702/9702 co-relation queries the response was YES. [2024-06-21 17:45:17,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26380 conditions, 9210 events. 6648/9210 cut-off events. For 9702/9702 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47611 event pairs, 3316 based on Foata normal form. 3/9210 useless extension candidates. Maximal degree in co-relation 26363. Up to 9108 conditions per place. [2024-06-21 17:45:17,245 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 70 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-21 17:45:17,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 494 flow [2024-06-21 17:45:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:45:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:45:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 17:45:17,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 17:45:17,246 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 118 transitions. [2024-06-21 17:45:17,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 494 flow [2024-06-21 17:45:17,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 450 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 17:45:17,251 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 286 flow [2024-06-21 17:45:17,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-06-21 17:45:17,252 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-21 17:45:17,252 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 286 flow [2024-06-21 17:45:17,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:17,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:17,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:17,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:45:17,253 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:17,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:17,253 INFO L85 PathProgramCache]: Analyzing trace with hash -95189707, now seen corresponding path program 1 times [2024-06-21 17:45:17,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:17,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751934425] [2024-06-21 17:45:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:17,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:20,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:20,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751934425] [2024-06-21 17:45:20,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751934425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:20,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:20,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:45:20,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900160666] [2024-06-21 17:45:20,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:20,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:45:20,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:20,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:45:20,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:45:20,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:20,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:20,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:20,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:20,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:22,387 INFO L124 PetriNetUnfolderBase]: 6675/9240 cut-off events. [2024-06-21 17:45:22,388 INFO L125 PetriNetUnfolderBase]: For 14074/14074 co-relation queries the response was YES. [2024-06-21 17:45:22,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28861 conditions, 9240 events. 6675/9240 cut-off events. For 14074/14074 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47568 event pairs, 3168 based on Foata normal form. 3/9237 useless extension candidates. Maximal degree in co-relation 28841. Up to 9077 conditions per place. [2024-06-21 17:45:22,465 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 87 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-21 17:45:22,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 113 transitions, 675 flow [2024-06-21 17:45:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:45:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:45:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 17:45:22,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:45:22,468 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 286 flow. Second operand 6 states and 150 transitions. [2024-06-21 17:45:22,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 113 transitions, 675 flow [2024-06-21 17:45:22,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 665 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 17:45:22,475 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 409 flow [2024-06-21 17:45:22,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-21 17:45:22,478 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-21 17:45:22,478 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 409 flow [2024-06-21 17:45:22,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:22,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:22,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:22,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:45:22,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:22,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:22,479 INFO L85 PathProgramCache]: Analyzing trace with hash -73792267, now seen corresponding path program 2 times [2024-06-21 17:45:22,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:22,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661726199] [2024-06-21 17:45:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:22,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:24,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:24,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661726199] [2024-06-21 17:45:24,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661726199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:24,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:24,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:45:24,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403378617] [2024-06-21 17:45:24,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:24,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:45:24,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:24,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:45:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:45:24,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:24,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 409 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:24,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:24,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:24,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:27,149 INFO L124 PetriNetUnfolderBase]: 6666/9238 cut-off events. [2024-06-21 17:45:27,149 INFO L125 PetriNetUnfolderBase]: For 20521/20534 co-relation queries the response was YES. [2024-06-21 17:45:27,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31511 conditions, 9238 events. 6666/9238 cut-off events. For 20521/20534 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47733 event pairs, 3175 based on Foata normal form. 13/9246 useless extension candidates. Maximal degree in co-relation 31487. Up to 9068 conditions per place. [2024-06-21 17:45:27,195 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 80 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-21 17:45:27,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 694 flow [2024-06-21 17:45:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:45:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:45:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 17:45:27,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:45:27,197 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 409 flow. Second operand 6 states and 143 transitions. [2024-06-21 17:45:27,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 694 flow [2024-06-21 17:45:27,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 648 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 17:45:27,222 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 423 flow [2024-06-21 17:45:27,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-21 17:45:27,222 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-21 17:45:27,222 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 423 flow [2024-06-21 17:45:27,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:27,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:27,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:27,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:45:27,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:27,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:27,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1662780157, now seen corresponding path program 1 times [2024-06-21 17:45:27,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:27,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981867810] [2024-06-21 17:45:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:27,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:29,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:29,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981867810] [2024-06-21 17:45:29,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981867810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:29,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:29,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:45:29,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994813261] [2024-06-21 17:45:29,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:29,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:45:29,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:29,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:45:29,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:45:29,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:29,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 423 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:29,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:29,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:29,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:31,125 INFO L124 PetriNetUnfolderBase]: 6651/9214 cut-off events. [2024-06-21 17:45:31,125 INFO L125 PetriNetUnfolderBase]: For 23651/23651 co-relation queries the response was YES. [2024-06-21 17:45:31,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31802 conditions, 9214 events. 6651/9214 cut-off events. For 23651/23651 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47643 event pairs, 3011 based on Foata normal form. 6/9217 useless extension candidates. Maximal degree in co-relation 31777. Up to 9074 conditions per place. [2024-06-21 17:45:31,187 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 92 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-21 17:45:31,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 733 flow [2024-06-21 17:45:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:45:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:45:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 17:45:31,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 17:45:31,189 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 423 flow. Second operand 6 states and 141 transitions. [2024-06-21 17:45:31,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 733 flow [2024-06-21 17:45:31,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 700 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 17:45:31,206 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 454 flow [2024-06-21 17:45:31,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=454, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-21 17:45:31,207 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-21 17:45:31,207 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 454 flow [2024-06-21 17:45:31,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:31,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:31,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:31,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:45:31,208 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:31,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:31,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1549918741, now seen corresponding path program 1 times [2024-06-21 17:45:31,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:31,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659386907] [2024-06-21 17:45:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:31,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:34,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:34,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659386907] [2024-06-21 17:45:34,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659386907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:34,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:34,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:45:34,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858716569] [2024-06-21 17:45:34,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:34,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:45:34,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:34,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:45:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:45:34,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:34,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 454 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:34,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:34,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:34,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:36,850 INFO L124 PetriNetUnfolderBase]: 6697/9305 cut-off events. [2024-06-21 17:45:36,850 INFO L125 PetriNetUnfolderBase]: For 30778/30781 co-relation queries the response was YES. [2024-06-21 17:45:36,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33868 conditions, 9305 events. 6697/9305 cut-off events. For 30778/30781 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 48690 event pairs, 2838 based on Foata normal form. 7/9308 useless extension candidates. Maximal degree in co-relation 33841. Up to 9064 conditions per place. [2024-06-21 17:45:36,890 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 102 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-06-21 17:45:36,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 870 flow [2024-06-21 17:45:36,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:45:36,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:45:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 17:45:36,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 17:45:36,892 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 454 flow. Second operand 7 states and 176 transitions. [2024-06-21 17:45:36,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 870 flow [2024-06-21 17:45:36,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 832 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 17:45:36,907 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 526 flow [2024-06-21 17:45:36,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-21 17:45:36,908 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-21 17:45:36,908 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 526 flow [2024-06-21 17:45:36,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:36,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:36,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:36,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:45:36,909 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:36,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:36,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1549923391, now seen corresponding path program 2 times [2024-06-21 17:45:36,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:36,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520645280] [2024-06-21 17:45:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:36,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:39,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:39,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520645280] [2024-06-21 17:45:39,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520645280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:39,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:39,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:45:39,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765440723] [2024-06-21 17:45:39,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:39,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:45:39,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:45:39,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:45:39,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:39,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 526 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:39,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:39,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:39,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:42,247 INFO L124 PetriNetUnfolderBase]: 6724/9332 cut-off events. [2024-06-21 17:45:42,247 INFO L125 PetriNetUnfolderBase]: For 38967/38967 co-relation queries the response was YES. [2024-06-21 17:45:42,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36900 conditions, 9332 events. 6724/9332 cut-off events. For 38967/38967 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48256 event pairs, 2984 based on Foata normal form. 3/9329 useless extension candidates. Maximal degree in co-relation 36872. Up to 9059 conditions per place. [2024-06-21 17:45:42,298 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 105 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-21 17:45:42,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 145 transitions, 1096 flow [2024-06-21 17:45:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:45:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:45:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 17:45:42,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:45:42,300 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 526 flow. Second operand 7 states and 175 transitions. [2024-06-21 17:45:42,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 145 transitions, 1096 flow [2024-06-21 17:45:42,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 145 transitions, 998 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 17:45:42,322 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 682 flow [2024-06-21 17:45:42,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-21 17:45:42,322 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-21 17:45:42,323 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 682 flow [2024-06-21 17:45:42,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:42,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:42,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:42,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:45:42,323 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:42,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash 671267741, now seen corresponding path program 3 times [2024-06-21 17:45:42,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:42,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979434917] [2024-06-21 17:45:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:42,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:44,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:44,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979434917] [2024-06-21 17:45:44,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979434917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:44,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:44,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:45:44,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333250275] [2024-06-21 17:45:44,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:44,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:45:44,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:45:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:45:45,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:45,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 682 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:45,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:45,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:45,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:47,565 INFO L124 PetriNetUnfolderBase]: 6715/9323 cut-off events. [2024-06-21 17:45:47,565 INFO L125 PetriNetUnfolderBase]: For 50273/50273 co-relation queries the response was YES. [2024-06-21 17:45:47,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39395 conditions, 9323 events. 6715/9323 cut-off events. For 50273/50273 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48135 event pairs, 3001 based on Foata normal form. 3/9318 useless extension candidates. Maximal degree in co-relation 39364. Up to 9050 conditions per place. [2024-06-21 17:45:47,610 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 98 selfloop transitions, 35 changer transitions 0/139 dead transitions. [2024-06-21 17:45:47,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 1057 flow [2024-06-21 17:45:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:45:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:45:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:45:47,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 17:45:47,612 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 682 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:45:47,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 1057 flow [2024-06-21 17:45:47,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 139 transitions, 993 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 17:45:47,638 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 710 flow [2024-06-21 17:45:47,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-21 17:45:47,638 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-21 17:45:47,639 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 710 flow [2024-06-21 17:45:47,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:47,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:47,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:47,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:45:47,639 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:47,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:47,640 INFO L85 PathProgramCache]: Analyzing trace with hash 980604172, now seen corresponding path program 1 times [2024-06-21 17:45:47,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:47,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137898405] [2024-06-21 17:45:47,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:47,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:49,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:49,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137898405] [2024-06-21 17:45:49,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137898405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:49,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:49,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:45:49,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995506394] [2024-06-21 17:45:49,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:49,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:45:49,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:49,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:45:49,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:45:49,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:49,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:49,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:49,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:49,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:52,784 INFO L124 PetriNetUnfolderBase]: 7048/9790 cut-off events. [2024-06-21 17:45:52,785 INFO L125 PetriNetUnfolderBase]: For 59156/59156 co-relation queries the response was YES. [2024-06-21 17:45:52,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42373 conditions, 9790 events. 7048/9790 cut-off events. For 59156/59156 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50664 event pairs, 3004 based on Foata normal form. 18/9802 useless extension candidates. Maximal degree in co-relation 42340. Up to 9382 conditions per place. [2024-06-21 17:45:52,835 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 140 selfloop transitions, 54 changer transitions 0/200 dead transitions. [2024-06-21 17:45:52,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 200 transitions, 1616 flow [2024-06-21 17:45:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:45:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:45:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-21 17:45:52,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-21 17:45:52,838 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 710 flow. Second operand 11 states and 253 transitions. [2024-06-21 17:45:52,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 200 transitions, 1616 flow [2024-06-21 17:45:52,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 200 transitions, 1530 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:45:52,891 INFO L231 Difference]: Finished difference. Result has 99 places, 135 transitions, 1112 flow [2024-06-21 17:45:52,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1112, PETRI_PLACES=99, PETRI_TRANSITIONS=135} [2024-06-21 17:45:52,892 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-21 17:45:52,892 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 135 transitions, 1112 flow [2024-06-21 17:45:52,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:52,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:52,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:52,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:45:52,900 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:52,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:52,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1282946924, now seen corresponding path program 2 times [2024-06-21 17:45:52,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:52,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130143839] [2024-06-21 17:45:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:52,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:45:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:45:55,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:45:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130143839] [2024-06-21 17:45:55,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130143839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:45:55,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:45:55,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:45:55,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242065889] [2024-06-21 17:45:55,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:45:55,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:45:55,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:45:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:45:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:45:56,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:45:56,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 135 transitions, 1112 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:56,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:45:56,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:45:56,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:45:58,344 INFO L124 PetriNetUnfolderBase]: 7092/9854 cut-off events. [2024-06-21 17:45:58,344 INFO L125 PetriNetUnfolderBase]: For 80119/80119 co-relation queries the response was YES. [2024-06-21 17:45:58,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46855 conditions, 9854 events. 7092/9854 cut-off events. For 80119/80119 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51213 event pairs, 2964 based on Foata normal form. 6/9854 useless extension candidates. Maximal degree in co-relation 46816. Up to 9521 conditions per place. [2024-06-21 17:45:58,407 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 138 selfloop transitions, 42 changer transitions 0/186 dead transitions. [2024-06-21 17:45:58,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 186 transitions, 1670 flow [2024-06-21 17:45:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:45:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:45:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 17:45:58,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-21 17:45:58,409 INFO L175 Difference]: Start difference. First operand has 99 places, 135 transitions, 1112 flow. Second operand 7 states and 170 transitions. [2024-06-21 17:45:58,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 186 transitions, 1670 flow [2024-06-21 17:45:58,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 186 transitions, 1612 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 17:45:58,480 INFO L231 Difference]: Finished difference. Result has 104 places, 140 transitions, 1222 flow [2024-06-21 17:45:58,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1222, PETRI_PLACES=104, PETRI_TRANSITIONS=140} [2024-06-21 17:45:58,480 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-21 17:45:58,481 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 140 transitions, 1222 flow [2024-06-21 17:45:58,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:45:58,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:45:58,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:45:58,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:45:58,481 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:45:58,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:45:58,482 INFO L85 PathProgramCache]: Analyzing trace with hash -665529204, now seen corresponding path program 3 times [2024-06-21 17:45:58,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:45:58,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155261962] [2024-06-21 17:45:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:45:58,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:45:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:01,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:01,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155261962] [2024-06-21 17:46:01,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155261962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:01,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:01,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:46:01,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181323929] [2024-06-21 17:46:01,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:01,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:46:01,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:01,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:46:01,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:46:01,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:01,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 140 transitions, 1222 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:01,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:01,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:01,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:03,535 INFO L124 PetriNetUnfolderBase]: 7136/9928 cut-off events. [2024-06-21 17:46:03,536 INFO L125 PetriNetUnfolderBase]: For 93028/93041 co-relation queries the response was YES. [2024-06-21 17:46:03,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49234 conditions, 9928 events. 7136/9928 cut-off events. For 93028/93041 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51488 event pairs, 2984 based on Foata normal form. 16/9937 useless extension candidates. Maximal degree in co-relation 49193. Up to 9623 conditions per place. [2024-06-21 17:46:03,600 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 141 selfloop transitions, 40 changer transitions 0/187 dead transitions. [2024-06-21 17:46:03,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 1766 flow [2024-06-21 17:46:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 17:46:03,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-21 17:46:03,619 INFO L175 Difference]: Start difference. First operand has 104 places, 140 transitions, 1222 flow. Second operand 7 states and 166 transitions. [2024-06-21 17:46:03,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 1766 flow [2024-06-21 17:46:03,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 187 transitions, 1652 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 17:46:03,713 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1249 flow [2024-06-21 17:46:03,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1249, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-21 17:46:03,714 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-21 17:46:03,714 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1249 flow [2024-06-21 17:46:03,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:03,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:03,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:03,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:46:03,715 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:03,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:03,715 INFO L85 PathProgramCache]: Analyzing trace with hash 203937116, now seen corresponding path program 4 times [2024-06-21 17:46:03,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:03,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773030800] [2024-06-21 17:46:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:03,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:06,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773030800] [2024-06-21 17:46:06,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773030800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:06,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:06,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:46:06,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018685820] [2024-06-21 17:46:06,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:06,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:46:06,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:06,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:46:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:46:06,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:06,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1249 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:06,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:06,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:06,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:08,699 INFO L124 PetriNetUnfolderBase]: 7121/9907 cut-off events. [2024-06-21 17:46:08,700 INFO L125 PetriNetUnfolderBase]: For 105756/105769 co-relation queries the response was YES. [2024-06-21 17:46:08,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50660 conditions, 9907 events. 7121/9907 cut-off events. For 105756/105769 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51371 event pairs, 2739 based on Foata normal form. 16/9916 useless extension candidates. Maximal degree in co-relation 50618. Up to 9432 conditions per place. [2024-06-21 17:46:08,768 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 134 selfloop transitions, 50 changer transitions 0/190 dead transitions. [2024-06-21 17:46:08,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 190 transitions, 1799 flow [2024-06-21 17:46:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 17:46:08,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-21 17:46:08,770 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1249 flow. Second operand 7 states and 167 transitions. [2024-06-21 17:46:08,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 190 transitions, 1799 flow [2024-06-21 17:46:08,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 190 transitions, 1668 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 17:46:08,864 INFO L231 Difference]: Finished difference. Result has 108 places, 146 transitions, 1284 flow [2024-06-21 17:46:08,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1284, PETRI_PLACES=108, PETRI_TRANSITIONS=146} [2024-06-21 17:46:08,865 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-21 17:46:08,865 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 146 transitions, 1284 flow [2024-06-21 17:46:08,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:08,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:08,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:08,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:46:08,866 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:08,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:08,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1363574380, now seen corresponding path program 1 times [2024-06-21 17:46:08,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:08,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427134599] [2024-06-21 17:46:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:08,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:12,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:12,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427134599] [2024-06-21 17:46:12,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427134599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:12,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:12,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:46:12,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729810294] [2024-06-21 17:46:12,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:12,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:46:12,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:12,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:46:12,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:46:12,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:12,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 146 transitions, 1284 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:12,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:12,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:12,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:15,174 INFO L124 PetriNetUnfolderBase]: 7719/10791 cut-off events. [2024-06-21 17:46:15,174 INFO L125 PetriNetUnfolderBase]: For 134402/134405 co-relation queries the response was YES. [2024-06-21 17:46:15,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57236 conditions, 10791 events. 7719/10791 cut-off events. For 134402/134405 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 57519 event pairs, 2389 based on Foata normal form. 32/10819 useless extension candidates. Maximal degree in co-relation 57193. Up to 9794 conditions per place. [2024-06-21 17:46:15,234 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 183 selfloop transitions, 43 changer transitions 0/232 dead transitions. [2024-06-21 17:46:15,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 232 transitions, 2184 flow [2024-06-21 17:46:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:46:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:46:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-21 17:46:15,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-21 17:46:15,238 INFO L175 Difference]: Start difference. First operand has 108 places, 146 transitions, 1284 flow. Second operand 9 states and 231 transitions. [2024-06-21 17:46:15,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 232 transitions, 2184 flow [2024-06-21 17:46:15,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 232 transitions, 2044 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:46:15,365 INFO L231 Difference]: Finished difference. Result has 113 places, 155 transitions, 1380 flow [2024-06-21 17:46:15,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1380, PETRI_PLACES=113, PETRI_TRANSITIONS=155} [2024-06-21 17:46:15,367 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-21 17:46:15,367 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 155 transitions, 1380 flow [2024-06-21 17:46:15,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:15,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:15,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:15,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:46:15,368 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:15,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:15,369 INFO L85 PathProgramCache]: Analyzing trace with hash -97132032, now seen corresponding path program 2 times [2024-06-21 17:46:15,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:15,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015339556] [2024-06-21 17:46:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:15,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:18,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:18,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015339556] [2024-06-21 17:46:18,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015339556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:18,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:18,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:46:18,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462872094] [2024-06-21 17:46:18,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:18,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:46:18,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:18,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:46:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:46:18,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:18,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 155 transitions, 1380 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:18,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:18,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:18,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:21,384 INFO L124 PetriNetUnfolderBase]: 7621/10653 cut-off events. [2024-06-21 17:46:21,384 INFO L125 PetriNetUnfolderBase]: For 146882/146885 co-relation queries the response was YES. [2024-06-21 17:46:21,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57813 conditions, 10653 events. 7621/10653 cut-off events. For 146882/146885 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 56546 event pairs, 2869 based on Foata normal form. 42/10691 useless extension candidates. Maximal degree in co-relation 57768. Up to 10050 conditions per place. [2024-06-21 17:46:21,459 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 175 selfloop transitions, 37 changer transitions 0/218 dead transitions. [2024-06-21 17:46:21,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 218 transitions, 2023 flow [2024-06-21 17:46:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:46:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:46:21,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 17:46:21,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 17:46:21,468 INFO L175 Difference]: Start difference. First operand has 113 places, 155 transitions, 1380 flow. Second operand 8 states and 202 transitions. [2024-06-21 17:46:21,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 218 transitions, 2023 flow [2024-06-21 17:46:21,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 218 transitions, 1925 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 17:46:21,640 INFO L231 Difference]: Finished difference. Result has 116 places, 156 transitions, 1392 flow [2024-06-21 17:46:21,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=116, PETRI_TRANSITIONS=156} [2024-06-21 17:46:21,643 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-21 17:46:21,643 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 156 transitions, 1392 flow [2024-06-21 17:46:21,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:21,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:21,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:21,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:46:21,644 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:21,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash -877229634, now seen corresponding path program 3 times [2024-06-21 17:46:21,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:21,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282573518] [2024-06-21 17:46:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:21,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:25,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:25,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282573518] [2024-06-21 17:46:25,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282573518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:25,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:25,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:46:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430629104] [2024-06-21 17:46:25,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:25,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:46:25,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:25,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:46:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:46:25,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:25,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 156 transitions, 1392 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:25,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:25,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:25,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:27,840 INFO L124 PetriNetUnfolderBase]: 7777/10901 cut-off events. [2024-06-21 17:46:27,841 INFO L125 PetriNetUnfolderBase]: For 156122/156122 co-relation queries the response was YES. [2024-06-21 17:46:27,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59375 conditions, 10901 events. 7777/10901 cut-off events. For 156122/156122 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 58628 event pairs, 2910 based on Foata normal form. 24/10919 useless extension candidates. Maximal degree in co-relation 59328. Up to 10306 conditions per place. [2024-06-21 17:46:27,929 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 160 selfloop transitions, 51 changer transitions 0/217 dead transitions. [2024-06-21 17:46:27,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 217 transitions, 2050 flow [2024-06-21 17:46:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:46:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:46:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 17:46:27,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-21 17:46:27,932 INFO L175 Difference]: Start difference. First operand has 116 places, 156 transitions, 1392 flow. Second operand 8 states and 197 transitions. [2024-06-21 17:46:27,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 217 transitions, 2050 flow [2024-06-21 17:46:28,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 217 transitions, 1979 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:46:28,081 INFO L231 Difference]: Finished difference. Result has 118 places, 158 transitions, 1483 flow [2024-06-21 17:46:28,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1483, PETRI_PLACES=118, PETRI_TRANSITIONS=158} [2024-06-21 17:46:28,081 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-21 17:46:28,081 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 158 transitions, 1483 flow [2024-06-21 17:46:28,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:28,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:28,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:28,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:46:28,082 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:28,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:28,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1116647658, now seen corresponding path program 1 times [2024-06-21 17:46:28,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:28,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048559782] [2024-06-21 17:46:28,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:28,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:31,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:31,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048559782] [2024-06-21 17:46:31,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048559782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:31,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:31,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:46:31,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20104549] [2024-06-21 17:46:31,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:31,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:46:31,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:31,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:46:31,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:46:31,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:31,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 158 transitions, 1483 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:31,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:31,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:31,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:34,082 INFO L124 PetriNetUnfolderBase]: 7889/11093 cut-off events. [2024-06-21 17:46:34,082 INFO L125 PetriNetUnfolderBase]: For 175163/175163 co-relation queries the response was YES. [2024-06-21 17:46:34,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61725 conditions, 11093 events. 7889/11093 cut-off events. For 175163/175163 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 59939 event pairs, 2892 based on Foata normal form. 18/11105 useless extension candidates. Maximal degree in co-relation 61677. Up to 10038 conditions per place. [2024-06-21 17:46:34,146 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 160 selfloop transitions, 57 changer transitions 0/223 dead transitions. [2024-06-21 17:46:34,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 223 transitions, 2186 flow [2024-06-21 17:46:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:46:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:46:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 17:46:34,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-21 17:46:34,148 INFO L175 Difference]: Start difference. First operand has 118 places, 158 transitions, 1483 flow. Second operand 8 states and 199 transitions. [2024-06-21 17:46:34,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 223 transitions, 2186 flow [2024-06-21 17:46:34,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 223 transitions, 2064 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:46:34,272 INFO L231 Difference]: Finished difference. Result has 121 places, 161 transitions, 1574 flow [2024-06-21 17:46:34,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1574, PETRI_PLACES=121, PETRI_TRANSITIONS=161} [2024-06-21 17:46:34,272 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-21 17:46:34,272 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 161 transitions, 1574 flow [2024-06-21 17:46:34,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:34,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:34,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:34,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:46:34,273 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:34,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:34,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1735754146, now seen corresponding path program 4 times [2024-06-21 17:46:34,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:34,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656667442] [2024-06-21 17:46:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:34,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:37,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:37,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656667442] [2024-06-21 17:46:37,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656667442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:37,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:46:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646651870] [2024-06-21 17:46:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:37,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:46:37,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:37,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:46:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:46:37,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:37,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 161 transitions, 1574 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:37,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:37,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:37,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:40,455 INFO L124 PetriNetUnfolderBase]: 7986/11245 cut-off events. [2024-06-21 17:46:40,455 INFO L125 PetriNetUnfolderBase]: For 194338/194338 co-relation queries the response was YES. [2024-06-21 17:46:40,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63881 conditions, 11245 events. 7986/11245 cut-off events. For 194338/194338 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 61059 event pairs, 2970 based on Foata normal form. 24/11259 useless extension candidates. Maximal degree in co-relation 63831. Up to 10629 conditions per place. [2024-06-21 17:46:40,529 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 163 selfloop transitions, 50 changer transitions 0/219 dead transitions. [2024-06-21 17:46:40,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 219 transitions, 2240 flow [2024-06-21 17:46:40,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:46:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:46:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 17:46:40,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-21 17:46:40,533 INFO L175 Difference]: Start difference. First operand has 121 places, 161 transitions, 1574 flow. Second operand 8 states and 193 transitions. [2024-06-21 17:46:40,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 219 transitions, 2240 flow [2024-06-21 17:46:40,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 219 transitions, 2110 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 17:46:40,669 INFO L231 Difference]: Finished difference. Result has 124 places, 163 transitions, 1612 flow [2024-06-21 17:46:40,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1612, PETRI_PLACES=124, PETRI_TRANSITIONS=163} [2024-06-21 17:46:40,669 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-21 17:46:40,669 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 163 transitions, 1612 flow [2024-06-21 17:46:40,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:40,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:40,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:40,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:46:40,670 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:40,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:40,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1541175334, now seen corresponding path program 2 times [2024-06-21 17:46:40,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:40,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872874706] [2024-06-21 17:46:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:40,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:44,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:44,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872874706] [2024-06-21 17:46:44,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872874706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:44,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:44,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:46:44,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552979512] [2024-06-21 17:46:44,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:44,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:46:44,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:44,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:46:44,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:46:44,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:44,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 163 transitions, 1612 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:44,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:44,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:44,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:47,041 INFO L124 PetriNetUnfolderBase]: 8098/11437 cut-off events. [2024-06-21 17:46:47,042 INFO L125 PetriNetUnfolderBase]: For 213014/213014 co-relation queries the response was YES. [2024-06-21 17:46:47,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65835 conditions, 11437 events. 8098/11437 cut-off events. For 213014/213014 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 62456 event pairs, 2970 based on Foata normal form. 18/11445 useless extension candidates. Maximal degree in co-relation 65784. Up to 10611 conditions per place. [2024-06-21 17:46:47,130 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 166 selfloop transitions, 53 changer transitions 0/225 dead transitions. [2024-06-21 17:46:47,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 225 transitions, 2310 flow [2024-06-21 17:46:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:46:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:46:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 17:46:47,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 17:46:47,132 INFO L175 Difference]: Start difference. First operand has 124 places, 163 transitions, 1612 flow. Second operand 8 states and 196 transitions. [2024-06-21 17:46:47,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 225 transitions, 2310 flow [2024-06-21 17:46:47,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 225 transitions, 2182 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 17:46:47,353 INFO L231 Difference]: Finished difference. Result has 126 places, 165 transitions, 1661 flow [2024-06-21 17:46:47,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1661, PETRI_PLACES=126, PETRI_TRANSITIONS=165} [2024-06-21 17:46:47,353 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-21 17:46:47,353 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 165 transitions, 1661 flow [2024-06-21 17:46:47,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:47,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:47,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:47,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:46:47,354 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:47,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:47,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2027084622, now seen corresponding path program 3 times [2024-06-21 17:46:47,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:47,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300547352] [2024-06-21 17:46:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:47,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:50,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:50,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300547352] [2024-06-21 17:46:50,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300547352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:50,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:50,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:46:50,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748004167] [2024-06-21 17:46:50,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:50,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:46:50,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:50,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:46:50,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:46:50,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:50,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 165 transitions, 1661 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:50,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:50,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:50,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:53,384 INFO L124 PetriNetUnfolderBase]: 8059/11380 cut-off events. [2024-06-21 17:46:53,384 INFO L125 PetriNetUnfolderBase]: For 225093/225093 co-relation queries the response was YES. [2024-06-21 17:46:53,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66027 conditions, 11380 events. 8059/11380 cut-off events. For 225093/225093 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 61916 event pairs, 2595 based on Foata normal form. 18/11388 useless extension candidates. Maximal degree in co-relation 65975. Up to 9692 conditions per place. [2024-06-21 17:46:53,459 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 151 selfloop transitions, 68 changer transitions 0/225 dead transitions. [2024-06-21 17:46:53,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 225 transitions, 2311 flow [2024-06-21 17:46:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:46:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:46:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 17:46:53,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 17:46:53,461 INFO L175 Difference]: Start difference. First operand has 126 places, 165 transitions, 1661 flow. Second operand 8 states and 195 transitions. [2024-06-21 17:46:53,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 225 transitions, 2311 flow [2024-06-21 17:46:53,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 225 transitions, 2164 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:46:53,626 INFO L231 Difference]: Finished difference. Result has 127 places, 166 transitions, 1681 flow [2024-06-21 17:46:53,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1681, PETRI_PLACES=127, PETRI_TRANSITIONS=166} [2024-06-21 17:46:53,626 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-21 17:46:53,626 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 166 transitions, 1681 flow [2024-06-21 17:46:53,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:53,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:53,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:53,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:46:53,627 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:53,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:53,627 INFO L85 PathProgramCache]: Analyzing trace with hash -167216363, now seen corresponding path program 1 times [2024-06-21 17:46:53,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:53,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556301575] [2024-06-21 17:46:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:53,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:55,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:55,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556301575] [2024-06-21 17:46:55,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556301575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:55,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:55,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:46:55,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041046622] [2024-06-21 17:46:55,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:55,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:46:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:46:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:46:55,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:46:55,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 166 transitions, 1681 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) [2024-06-21 17:46:55,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:55,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:46:55,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:57,499 INFO L124 PetriNetUnfolderBase]: 7678/10973 cut-off events. [2024-06-21 17:46:57,499 INFO L125 PetriNetUnfolderBase]: For 230370/230373 co-relation queries the response was YES. [2024-06-21 17:46:57,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64159 conditions, 10973 events. 7678/10973 cut-off events. For 230370/230373 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 61250 event pairs, 2957 based on Foata normal form. 10/10942 useless extension candidates. Maximal degree in co-relation 64106. Up to 10351 conditions per place. [2024-06-21 17:46:57,586 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 160 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2024-06-21 17:46:57,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 200 transitions, 2267 flow [2024-06-21 17:46:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:46:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:46:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 17:46:57,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:46:57,588 INFO L175 Difference]: Start difference. First operand has 127 places, 166 transitions, 1681 flow. Second operand 5 states and 125 transitions. [2024-06-21 17:46:57,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 200 transitions, 2267 flow [2024-06-21 17:46:57,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 200 transitions, 2086 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:46:57,836 INFO L231 Difference]: Finished difference. Result has 127 places, 176 transitions, 1665 flow [2024-06-21 17:46:57,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1665, PETRI_PLACES=127, PETRI_TRANSITIONS=176} [2024-06-21 17:46:57,836 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-21 17:46:57,836 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 176 transitions, 1665 flow [2024-06-21 17:46:57,836 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) [2024-06-21 17:46:57,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:57,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:57,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:46:57,837 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:57,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:57,837 INFO L85 PathProgramCache]: Analyzing trace with hash -893506417, now seen corresponding path program 1 times [2024-06-21 17:46:57,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:57,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228796215] [2024-06-21 17:46:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:57,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:59,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:59,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228796215] [2024-06-21 17:46:59,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228796215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:59,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:59,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:46:59,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56447916] [2024-06-21 17:46:59,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:59,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:46:59,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:59,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:46:59,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:46:59,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:59,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 176 transitions, 1665 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-21 17:46:59,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:59,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:59,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:02,138 INFO L124 PetriNetUnfolderBase]: 8104/11451 cut-off events. [2024-06-21 17:47:02,138 INFO L125 PetriNetUnfolderBase]: For 252929/252935 co-relation queries the response was YES. [2024-06-21 17:47:02,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69329 conditions, 11451 events. 8104/11451 cut-off events. For 252929/252935 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 62592 event pairs, 2971 based on Foata normal form. 6/11452 useless extension candidates. Maximal degree in co-relation 69274. Up to 11191 conditions per place. [2024-06-21 17:47:02,224 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 186 selfloop transitions, 21 changer transitions 0/213 dead transitions. [2024-06-21 17:47:02,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 213 transitions, 2399 flow [2024-06-21 17:47:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:47:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:47:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 17:47:02,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-21 17:47:02,226 INFO L175 Difference]: Start difference. First operand has 127 places, 176 transitions, 1665 flow. Second operand 6 states and 139 transitions. [2024-06-21 17:47:02,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 213 transitions, 2399 flow [2024-06-21 17:47:02,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 213 transitions, 2345 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-21 17:47:02,439 INFO L231 Difference]: Finished difference. Result has 132 places, 184 transitions, 1818 flow [2024-06-21 17:47:02,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1818, PETRI_PLACES=132, PETRI_TRANSITIONS=184} [2024-06-21 17:47:02,439 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-21 17:47:02,439 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 184 transitions, 1818 flow [2024-06-21 17:47:02,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-21 17:47:02,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:02,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:02,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:47:02,440 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:02,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:02,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1270927, now seen corresponding path program 2 times [2024-06-21 17:47:02,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:02,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830984817] [2024-06-21 17:47:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:02,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:04,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:04,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830984817] [2024-06-21 17:47:04,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830984817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:04,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:04,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:47:04,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542443530] [2024-06-21 17:47:04,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:04,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:47:04,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:04,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:47:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:47:04,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:04,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 184 transitions, 1818 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-21 17:47:04,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:04,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:04,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:06,837 INFO L124 PetriNetUnfolderBase]: 8097/11442 cut-off events. [2024-06-21 17:47:06,837 INFO L125 PetriNetUnfolderBase]: For 276383/276389 co-relation queries the response was YES. [2024-06-21 17:47:06,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71431 conditions, 11442 events. 8097/11442 cut-off events. For 276383/276389 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 62466 event pairs, 2971 based on Foata normal form. 6/11443 useless extension candidates. Maximal degree in co-relation 71373. Up to 11195 conditions per place. [2024-06-21 17:47:06,919 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 183 selfloop transitions, 17 changer transitions 0/206 dead transitions. [2024-06-21 17:47:06,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 206 transitions, 2282 flow [2024-06-21 17:47:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:47:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:47:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 17:47:06,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 17:47:06,920 INFO L175 Difference]: Start difference. First operand has 132 places, 184 transitions, 1818 flow. Second operand 5 states and 118 transitions. [2024-06-21 17:47:06,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 206 transitions, 2282 flow [2024-06-21 17:47:07,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 206 transitions, 2156 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-21 17:47:07,178 INFO L231 Difference]: Finished difference. Result has 135 places, 184 transitions, 1740 flow [2024-06-21 17:47:07,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1740, PETRI_PLACES=135, PETRI_TRANSITIONS=184} [2024-06-21 17:47:07,179 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-21 17:47:07,179 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 184 transitions, 1740 flow [2024-06-21 17:47:07,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-21 17:47:07,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:07,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:07,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:47:07,180 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:07,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:07,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2106209130, now seen corresponding path program 1 times [2024-06-21 17:47:07,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:07,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50069678] [2024-06-21 17:47:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:07,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:10,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:10,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50069678] [2024-06-21 17:47:10,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50069678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:10,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:10,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:10,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201659514] [2024-06-21 17:47:10,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:10,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:10,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:10,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:10,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:10,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:47:10,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 184 transitions, 1740 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) [2024-06-21 17:47:10,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:10,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:47:10,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:12,972 INFO L124 PetriNetUnfolderBase]: 8186/11681 cut-off events. [2024-06-21 17:47:12,972 INFO L125 PetriNetUnfolderBase]: For 304602/304632 co-relation queries the response was YES. [2024-06-21 17:47:13,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73333 conditions, 11681 events. 8186/11681 cut-off events. For 304602/304632 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 65363 event pairs, 2922 based on Foata normal form. 20/11649 useless extension candidates. Maximal degree in co-relation 73273. Up to 10665 conditions per place. [2024-06-21 17:47:13,063 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 189 selfloop transitions, 53 changer transitions 0/265 dead transitions. [2024-06-21 17:47:13,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 265 transitions, 2832 flow [2024-06-21 17:47:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:47:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:47:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 17:47:13,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 17:47:13,065 INFO L175 Difference]: Start difference. First operand has 135 places, 184 transitions, 1740 flow. Second operand 9 states and 216 transitions. [2024-06-21 17:47:13,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 265 transitions, 2832 flow [2024-06-21 17:47:13,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 265 transitions, 2798 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:47:13,338 INFO L231 Difference]: Finished difference. Result has 142 places, 210 transitions, 2128 flow [2024-06-21 17:47:13,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2128, PETRI_PLACES=142, PETRI_TRANSITIONS=210} [2024-06-21 17:47:13,338 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 87 predicate places. [2024-06-21 17:47:13,338 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 210 transitions, 2128 flow [2024-06-21 17:47:13,339 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) [2024-06-21 17:47:13,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:13,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:13,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:47:13,339 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:13,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash -39581196, now seen corresponding path program 2 times [2024-06-21 17:47:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:13,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102529396] [2024-06-21 17:47:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:13,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:16,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:16,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102529396] [2024-06-21 17:47:16,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102529396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:16,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:16,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:16,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227480598] [2024-06-21 17:47:16,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:16,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:16,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:16,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:16,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:16,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:47:16,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 210 transitions, 2128 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) [2024-06-21 17:47:16,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:16,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:47:16,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:18,964 INFO L124 PetriNetUnfolderBase]: 8228/11739 cut-off events. [2024-06-21 17:47:18,965 INFO L125 PetriNetUnfolderBase]: For 334194/334224 co-relation queries the response was YES. [2024-06-21 17:47:19,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77667 conditions, 11739 events. 8228/11739 cut-off events. For 334194/334224 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 65653 event pairs, 2902 based on Foata normal form. 20/11707 useless extension candidates. Maximal degree in co-relation 77604. Up to 10709 conditions per place. [2024-06-21 17:47:19,054 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 179 selfloop transitions, 53 changer transitions 0/255 dead transitions. [2024-06-21 17:47:19,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 255 transitions, 2860 flow [2024-06-21 17:47:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 17:47:19,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-21 17:47:19,056 INFO L175 Difference]: Start difference. First operand has 142 places, 210 transitions, 2128 flow. Second operand 7 states and 170 transitions. [2024-06-21 17:47:19,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 255 transitions, 2860 flow [2024-06-21 17:47:19,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 255 transitions, 2766 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-21 17:47:19,408 INFO L231 Difference]: Finished difference. Result has 148 places, 216 transitions, 2288 flow [2024-06-21 17:47:19,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2288, PETRI_PLACES=148, PETRI_TRANSITIONS=216} [2024-06-21 17:47:19,409 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-21 17:47:19,409 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 216 transitions, 2288 flow [2024-06-21 17:47:19,409 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) [2024-06-21 17:47:19,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:19,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:19,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:47:19,409 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:19,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:19,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1467679546, now seen corresponding path program 3 times [2024-06-21 17:47:19,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:19,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769211769] [2024-06-21 17:47:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:19,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:21,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:21,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769211769] [2024-06-21 17:47:21,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769211769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:21,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:21,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:21,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345167543] [2024-06-21 17:47:21,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:21,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:21,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:21,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:21,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:21,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:47:21,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 216 transitions, 2288 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) [2024-06-21 17:47:21,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:21,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:47:21,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:24,737 INFO L124 PetriNetUnfolderBase]: 8334/11885 cut-off events. [2024-06-21 17:47:24,737 INFO L125 PetriNetUnfolderBase]: For 354549/354627 co-relation queries the response was YES. [2024-06-21 17:47:24,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79940 conditions, 11885 events. 8334/11885 cut-off events. For 354549/354627 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 66429 event pairs, 2931 based on Foata normal form. 31/11842 useless extension candidates. Maximal degree in co-relation 79874. Up to 10533 conditions per place. [2024-06-21 17:47:24,828 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 176 selfloop transitions, 65 changer transitions 0/264 dead transitions. [2024-06-21 17:47:24,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 264 transitions, 3182 flow [2024-06-21 17:47:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:47:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:47:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 17:47:24,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-21 17:47:24,830 INFO L175 Difference]: Start difference. First operand has 148 places, 216 transitions, 2288 flow. Second operand 6 states and 151 transitions. [2024-06-21 17:47:24,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 264 transitions, 3182 flow [2024-06-21 17:47:25,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 264 transitions, 3050 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 17:47:25,158 INFO L231 Difference]: Finished difference. Result has 151 places, 230 transitions, 2534 flow [2024-06-21 17:47:25,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2534, PETRI_PLACES=151, PETRI_TRANSITIONS=230} [2024-06-21 17:47:25,159 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-21 17:47:25,159 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 230 transitions, 2534 flow [2024-06-21 17:47:25,159 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) [2024-06-21 17:47:25,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:25,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:25,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:47:25,160 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:25,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:25,160 INFO L85 PathProgramCache]: Analyzing trace with hash 931386918, now seen corresponding path program 1 times [2024-06-21 17:47:25,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:25,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356251089] [2024-06-21 17:47:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:25,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:27,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:27,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356251089] [2024-06-21 17:47:27,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356251089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:27,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:27,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:27,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359425354] [2024-06-21 17:47:27,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:27,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:27,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:27,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:27,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:27,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 230 transitions, 2534 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:27,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:27,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:27,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:30,553 INFO L124 PetriNetUnfolderBase]: 9017/12685 cut-off events. [2024-06-21 17:47:30,553 INFO L125 PetriNetUnfolderBase]: For 364084/364084 co-relation queries the response was YES. [2024-06-21 17:47:30,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87282 conditions, 12685 events. 9017/12685 cut-off events. For 364084/364084 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 69058 event pairs, 3003 based on Foata normal form. 8/12686 useless extension candidates. Maximal degree in co-relation 87214. Up to 12071 conditions per place. [2024-06-21 17:47:30,664 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 249 selfloop transitions, 37 changer transitions 0/292 dead transitions. [2024-06-21 17:47:30,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 292 transitions, 3760 flow [2024-06-21 17:47:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:30,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 17:47:30,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:47:30,666 INFO L175 Difference]: Start difference. First operand has 151 places, 230 transitions, 2534 flow. Second operand 7 states and 175 transitions. [2024-06-21 17:47:30,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 292 transitions, 3760 flow [2024-06-21 17:47:31,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 292 transitions, 3658 flow, removed 50 selfloop flow, removed 1 redundant places. [2024-06-21 17:47:31,112 INFO L231 Difference]: Finished difference. Result has 159 places, 245 transitions, 2788 flow [2024-06-21 17:47:31,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2788, PETRI_PLACES=159, PETRI_TRANSITIONS=245} [2024-06-21 17:47:31,113 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-21 17:47:31,113 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 245 transitions, 2788 flow [2024-06-21 17:47:31,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:31,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:31,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:31,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:47:31,114 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:31,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:31,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1822585458, now seen corresponding path program 2 times [2024-06-21 17:47:31,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:31,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211498240] [2024-06-21 17:47:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:31,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:33,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:33,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211498240] [2024-06-21 17:47:33,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211498240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:33,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:33,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:33,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324701090] [2024-06-21 17:47:33,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:33,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:33,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:33,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:33,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:33,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 245 transitions, 2788 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:33,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:33,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:33,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:36,408 INFO L124 PetriNetUnfolderBase]: 9139/12854 cut-off events. [2024-06-21 17:47:36,408 INFO L125 PetriNetUnfolderBase]: For 390148/390154 co-relation queries the response was YES. [2024-06-21 17:47:36,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89433 conditions, 12854 events. 9139/12854 cut-off events. For 390148/390154 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 70041 event pairs, 2994 based on Foata normal form. 12/12861 useless extension candidates. Maximal degree in co-relation 89360. Up to 12267 conditions per place. [2024-06-21 17:47:36,535 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 263 selfloop transitions, 39 changer transitions 0/308 dead transitions. [2024-06-21 17:47:36,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 308 transitions, 3996 flow [2024-06-21 17:47:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:47:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:47:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 17:47:36,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 17:47:36,536 INFO L175 Difference]: Start difference. First operand has 159 places, 245 transitions, 2788 flow. Second operand 8 states and 196 transitions. [2024-06-21 17:47:36,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 308 transitions, 3996 flow [2024-06-21 17:47:37,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 308 transitions, 3853 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-21 17:47:37,115 INFO L231 Difference]: Finished difference. Result has 166 places, 256 transitions, 2968 flow [2024-06-21 17:47:37,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2968, PETRI_PLACES=166, PETRI_TRANSITIONS=256} [2024-06-21 17:47:37,116 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2024-06-21 17:47:37,116 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 256 transitions, 2968 flow [2024-06-21 17:47:37,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:37,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:37,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:37,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:47:37,116 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:37,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:37,117 INFO L85 PathProgramCache]: Analyzing trace with hash -39396684, now seen corresponding path program 3 times [2024-06-21 17:47:37,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:37,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482873239] [2024-06-21 17:47:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:37,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:39,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:39,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482873239] [2024-06-21 17:47:39,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482873239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:39,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:39,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:39,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191670683] [2024-06-21 17:47:39,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:39,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:39,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:39,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:39,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:39,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 256 transitions, 2968 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:39,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:39,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:39,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:42,154 INFO L124 PetriNetUnfolderBase]: 9121/12833 cut-off events. [2024-06-21 17:47:42,154 INFO L125 PetriNetUnfolderBase]: For 411614/411614 co-relation queries the response was YES. [2024-06-21 17:47:42,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90284 conditions, 12833 events. 9121/12833 cut-off events. For 411614/411614 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 69890 event pairs, 3018 based on Foata normal form. 8/12834 useless extension candidates. Maximal degree in co-relation 90208. Up to 12257 conditions per place. [2024-06-21 17:47:42,259 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 251 selfloop transitions, 35 changer transitions 0/292 dead transitions. [2024-06-21 17:47:42,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 292 transitions, 3784 flow [2024-06-21 17:47:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:47:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:47:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 17:47:42,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:47:42,261 INFO L175 Difference]: Start difference. First operand has 166 places, 256 transitions, 2968 flow. Second operand 6 states and 150 transitions. [2024-06-21 17:47:42,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 292 transitions, 3784 flow [2024-06-21 17:47:42,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 292 transitions, 3601 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-21 17:47:42,811 INFO L231 Difference]: Finished difference. Result has 168 places, 256 transitions, 2866 flow [2024-06-21 17:47:42,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2866, PETRI_PLACES=168, PETRI_TRANSITIONS=256} [2024-06-21 17:47:42,812 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-06-21 17:47:42,812 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 256 transitions, 2866 flow [2024-06-21 17:47:42,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:42,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:42,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:42,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:47:42,813 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:42,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:42,813 INFO L85 PathProgramCache]: Analyzing trace with hash -39181358, now seen corresponding path program 1 times [2024-06-21 17:47:42,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:42,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009743078] [2024-06-21 17:47:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:42,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:45,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:45,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009743078] [2024-06-21 17:47:45,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009743078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:45,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:45,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:45,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785987067] [2024-06-21 17:47:45,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:45,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:45,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:45,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:45,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:47:45,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 256 transitions, 2866 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) [2024-06-21 17:47:45,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:45,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:47:45,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:48,560 INFO L124 PetriNetUnfolderBase]: 8621/12316 cut-off events. [2024-06-21 17:47:48,561 INFO L125 PetriNetUnfolderBase]: For 424443/424522 co-relation queries the response was YES. [2024-06-21 17:47:48,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87170 conditions, 12316 events. 8621/12316 cut-off events. For 424443/424522 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 69156 event pairs, 2949 based on Foata normal form. 18/12283 useless extension candidates. Maximal degree in co-relation 87092. Up to 11484 conditions per place. [2024-06-21 17:47:48,697 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 251 selfloop transitions, 20 changer transitions 0/294 dead transitions. [2024-06-21 17:47:48,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 294 transitions, 3680 flow [2024-06-21 17:47:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:47:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:47:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 17:47:48,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:47:48,699 INFO L175 Difference]: Start difference. First operand has 168 places, 256 transitions, 2866 flow. Second operand 6 states and 150 transitions. [2024-06-21 17:47:48,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 294 transitions, 3680 flow [2024-06-21 17:47:49,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 294 transitions, 3610 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 17:47:49,342 INFO L231 Difference]: Finished difference. Result has 169 places, 259 transitions, 2927 flow [2024-06-21 17:47:49,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2927, PETRI_PLACES=169, PETRI_TRANSITIONS=259} [2024-06-21 17:47:49,342 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2024-06-21 17:47:49,342 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 259 transitions, 2927 flow [2024-06-21 17:47:49,343 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) [2024-06-21 17:47:49,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:49,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:49,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:47:49,343 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:49,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:49,343 INFO L85 PathProgramCache]: Analyzing trace with hash -872740050, now seen corresponding path program 1 times [2024-06-21 17:47:49,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:49,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146115742] [2024-06-21 17:47:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:49,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:52,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:52,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146115742] [2024-06-21 17:47:52,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146115742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:52,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:52,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:52,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721084476] [2024-06-21 17:47:52,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:52,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:52,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:52,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:52,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:52,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:52,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 259 transitions, 2927 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:52,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:52,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:52,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:55,827 INFO L124 PetriNetUnfolderBase]: 9250/13003 cut-off events. [2024-06-21 17:47:55,828 INFO L125 PetriNetUnfolderBase]: For 472934/472946 co-relation queries the response was YES. [2024-06-21 17:47:55,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93439 conditions, 13003 events. 9250/13003 cut-off events. For 472934/472946 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 71048 event pairs, 3091 based on Foata normal form. 10/13004 useless extension candidates. Maximal degree in co-relation 93360. Up to 12473 conditions per place. [2024-06-21 17:47:55,959 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 249 selfloop transitions, 61 changer transitions 0/316 dead transitions. [2024-06-21 17:47:55,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 316 transitions, 4223 flow [2024-06-21 17:47:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 17:47:55,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697802197802198 [2024-06-21 17:47:55,961 INFO L175 Difference]: Start difference. First operand has 169 places, 259 transitions, 2927 flow. Second operand 7 states and 171 transitions. [2024-06-21 17:47:55,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 316 transitions, 4223 flow [2024-06-21 17:47:56,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 316 transitions, 4126 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 17:47:56,489 INFO L231 Difference]: Finished difference. Result has 172 places, 271 transitions, 3271 flow [2024-06-21 17:47:56,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3271, PETRI_PLACES=172, PETRI_TRANSITIONS=271} [2024-06-21 17:47:56,490 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2024-06-21 17:47:56,490 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 271 transitions, 3271 flow [2024-06-21 17:47:56,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:56,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:56,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:56,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:47:56,490 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:56,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:56,491 INFO L85 PathProgramCache]: Analyzing trace with hash -867978450, now seen corresponding path program 2 times [2024-06-21 17:47:56,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:56,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784587168] [2024-06-21 17:47:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:56,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:59,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:59,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784587168] [2024-06-21 17:47:59,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784587168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:59,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:59,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:59,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048665042] [2024-06-21 17:47:59,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:59,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:59,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:59,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:59,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:59,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:59,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 271 transitions, 3271 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:59,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:59,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:59,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:02,942 INFO L124 PetriNetUnfolderBase]: 9288/13084 cut-off events. [2024-06-21 17:48:02,943 INFO L125 PetriNetUnfolderBase]: For 507127/507130 co-relation queries the response was YES. [2024-06-21 17:48:02,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95908 conditions, 13084 events. 9288/13084 cut-off events. For 507127/507130 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 71763 event pairs, 3091 based on Foata normal form. 4/13084 useless extension candidates. Maximal degree in co-relation 95828. Up to 12619 conditions per place. [2024-06-21 17:48:03,061 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 271 selfloop transitions, 41 changer transitions 0/318 dead transitions. [2024-06-21 17:48:03,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 318 transitions, 4160 flow [2024-06-21 17:48:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 17:48:03,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-21 17:48:03,063 INFO L175 Difference]: Start difference. First operand has 172 places, 271 transitions, 3271 flow. Second operand 7 states and 163 transitions. [2024-06-21 17:48:03,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 318 transitions, 4160 flow [2024-06-21 17:48:03,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 318 transitions, 3989 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-21 17:48:03,602 INFO L231 Difference]: Finished difference. Result has 177 places, 279 transitions, 3352 flow [2024-06-21 17:48:03,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3352, PETRI_PLACES=177, PETRI_TRANSITIONS=279} [2024-06-21 17:48:03,603 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 122 predicate places. [2024-06-21 17:48:03,603 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 279 transitions, 3352 flow [2024-06-21 17:48:03,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:03,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:03,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:03,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:48:03,604 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:03,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash 333489104, now seen corresponding path program 3 times [2024-06-21 17:48:03,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:03,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164509574] [2024-06-21 17:48:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:03,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:06,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:06,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164509574] [2024-06-21 17:48:06,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164509574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:06,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:06,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:06,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145837728] [2024-06-21 17:48:06,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:06,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:06,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:06,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:06,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 279 transitions, 3352 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:06,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:06,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:06,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:09,436 INFO L124 PetriNetUnfolderBase]: 9307/13102 cut-off events. [2024-06-21 17:48:09,437 INFO L125 PetriNetUnfolderBase]: For 529499/529549 co-relation queries the response was YES. [2024-06-21 17:48:09,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96240 conditions, 13102 events. 9307/13102 cut-off events. For 529499/529549 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 71916 event pairs, 3091 based on Foata normal form. 29/13121 useless extension candidates. Maximal degree in co-relation 96158. Up to 12538 conditions per place. [2024-06-21 17:48:09,569 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 252 selfloop transitions, 68 changer transitions 0/326 dead transitions. [2024-06-21 17:48:09,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 326 transitions, 4478 flow [2024-06-21 17:48:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 17:48:09,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-21 17:48:09,579 INFO L175 Difference]: Start difference. First operand has 177 places, 279 transitions, 3352 flow. Second operand 7 states and 167 transitions. [2024-06-21 17:48:09,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 326 transitions, 4478 flow [2024-06-21 17:48:10,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 326 transitions, 4336 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:10,255 INFO L231 Difference]: Finished difference. Result has 179 places, 283 transitions, 3450 flow [2024-06-21 17:48:10,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3450, PETRI_PLACES=179, PETRI_TRANSITIONS=283} [2024-06-21 17:48:10,255 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2024-06-21 17:48:10,255 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 283 transitions, 3450 flow [2024-06-21 17:48:10,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:10,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:10,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:10,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:48:10,256 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:10,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2044676966, now seen corresponding path program 4 times [2024-06-21 17:48:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:10,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637146494] [2024-06-21 17:48:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:10,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:12,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:12,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637146494] [2024-06-21 17:48:12,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637146494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:12,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:12,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:12,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444261505] [2024-06-21 17:48:12,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:12,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:12,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:12,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:12,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:12,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 283 transitions, 3450 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:12,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:12,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:12,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:16,421 INFO L124 PetriNetUnfolderBase]: 9326/13127 cut-off events. [2024-06-21 17:48:16,421 INFO L125 PetriNetUnfolderBase]: For 551745/551788 co-relation queries the response was YES. [2024-06-21 17:48:16,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97268 conditions, 13127 events. 9326/13127 cut-off events. For 551745/551788 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 71928 event pairs, 3091 based on Foata normal form. 25/13142 useless extension candidates. Maximal degree in co-relation 97185. Up to 12558 conditions per place. [2024-06-21 17:48:16,551 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 243 selfloop transitions, 74 changer transitions 0/323 dead transitions. [2024-06-21 17:48:16,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 323 transitions, 4428 flow [2024-06-21 17:48:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:16,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:16,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 17:48:16,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-21 17:48:16,554 INFO L175 Difference]: Start difference. First operand has 179 places, 283 transitions, 3450 flow. Second operand 7 states and 161 transitions. [2024-06-21 17:48:16,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 323 transitions, 4428 flow [2024-06-21 17:48:17,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 323 transitions, 4164 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 17:48:17,248 INFO L231 Difference]: Finished difference. Result has 180 places, 287 transitions, 3445 flow [2024-06-21 17:48:17,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3202, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3445, PETRI_PLACES=180, PETRI_TRANSITIONS=287} [2024-06-21 17:48:17,249 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-21 17:48:17,249 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 287 transitions, 3445 flow [2024-06-21 17:48:17,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:17,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:17,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:17,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:48:17,250 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:17,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:17,250 INFO L85 PathProgramCache]: Analyzing trace with hash 424144742, now seen corresponding path program 5 times [2024-06-21 17:48:17,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:17,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389331184] [2024-06-21 17:48:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:17,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:19,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:19,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389331184] [2024-06-21 17:48:19,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389331184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:19,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:19,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:19,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379328702] [2024-06-21 17:48:19,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:19,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:19,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:19,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:20,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:20,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 287 transitions, 3445 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:20,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:20,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:20,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:23,465 INFO L124 PetriNetUnfolderBase]: 9319/13113 cut-off events. [2024-06-21 17:48:23,465 INFO L125 PetriNetUnfolderBase]: For 570449/570452 co-relation queries the response was YES. [2024-06-21 17:48:23,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97541 conditions, 13113 events. 9319/13113 cut-off events. For 570449/570452 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 71934 event pairs, 3072 based on Foata normal form. 4/13113 useless extension candidates. Maximal degree in co-relation 97458. Up to 12505 conditions per place. [2024-06-21 17:48:23,600 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 257 selfloop transitions, 82 changer transitions 0/345 dead transitions. [2024-06-21 17:48:23,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 345 transitions, 4439 flow [2024-06-21 17:48:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 17:48:23,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2024-06-21 17:48:23,602 INFO L175 Difference]: Start difference. First operand has 180 places, 287 transitions, 3445 flow. Second operand 8 states and 198 transitions. [2024-06-21 17:48:23,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 345 transitions, 4439 flow [2024-06-21 17:48:24,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 345 transitions, 4208 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-21 17:48:24,722 INFO L231 Difference]: Finished difference. Result has 184 places, 287 transitions, 3421 flow [2024-06-21 17:48:24,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3214, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3421, PETRI_PLACES=184, PETRI_TRANSITIONS=287} [2024-06-21 17:48:24,723 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 129 predicate places. [2024-06-21 17:48:24,723 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 287 transitions, 3421 flow [2024-06-21 17:48:24,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:24,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:24,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:24,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:48:24,724 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:24,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:24,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1221308016, now seen corresponding path program 6 times [2024-06-21 17:48:24,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:24,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040595882] [2024-06-21 17:48:24,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:24,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:27,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040595882] [2024-06-21 17:48:27,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040595882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:27,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:27,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:27,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574524397] [2024-06-21 17:48:27,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:27,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:27,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:27,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:27,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:27,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:27,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 287 transitions, 3421 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:27,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:27,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:27,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:30,854 INFO L124 PetriNetUnfolderBase]: 9440/13286 cut-off events. [2024-06-21 17:48:30,854 INFO L125 PetriNetUnfolderBase]: For 596769/596773 co-relation queries the response was YES. [2024-06-21 17:48:30,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99447 conditions, 13286 events. 9440/13286 cut-off events. For 596769/596773 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 72764 event pairs, 3111 based on Foata normal form. 3/13279 useless extension candidates. Maximal degree in co-relation 99363. Up to 12795 conditions per place. [2024-06-21 17:48:31,012 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 279 selfloop transitions, 58 changer transitions 0/343 dead transitions. [2024-06-21 17:48:31,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 343 transitions, 4567 flow [2024-06-21 17:48:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 17:48:31,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014423076923077 [2024-06-21 17:48:31,015 INFO L175 Difference]: Start difference. First operand has 184 places, 287 transitions, 3421 flow. Second operand 8 states and 167 transitions. [2024-06-21 17:48:31,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 343 transitions, 4567 flow [2024-06-21 17:48:31,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 343 transitions, 4227 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 17:48:31,847 INFO L231 Difference]: Finished difference. Result has 187 places, 311 transitions, 3670 flow [2024-06-21 17:48:31,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3670, PETRI_PLACES=187, PETRI_TRANSITIONS=311} [2024-06-21 17:48:31,848 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-21 17:48:31,848 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 311 transitions, 3670 flow [2024-06-21 17:48:31,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:31,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:31,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:31,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:48:31,849 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:31,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:31,849 INFO L85 PathProgramCache]: Analyzing trace with hash 330996270, now seen corresponding path program 1 times [2024-06-21 17:48:31,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:31,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267036960] [2024-06-21 17:48:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:31,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:34,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:34,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267036960] [2024-06-21 17:48:34,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267036960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:34,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:34,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:34,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913404217] [2024-06-21 17:48:34,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:34,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:34,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:34,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:34,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:34,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 311 transitions, 3670 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:34,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:34,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:34,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:37,533 INFO L124 PetriNetUnfolderBase]: 9472/13336 cut-off events. [2024-06-21 17:48:37,534 INFO L125 PetriNetUnfolderBase]: For 570122/570125 co-relation queries the response was YES. [2024-06-21 17:48:37,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99054 conditions, 13336 events. 9472/13336 cut-off events. For 570122/570125 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 73125 event pairs, 2948 based on Foata normal form. 6/13337 useless extension candidates. Maximal degree in co-relation 98966. Up to 12881 conditions per place. [2024-06-21 17:48:37,662 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 320 selfloop transitions, 30 changer transitions 0/356 dead transitions. [2024-06-21 17:48:37,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 356 transitions, 4796 flow [2024-06-21 17:48:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 17:48:37,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-21 17:48:37,665 INFO L175 Difference]: Start difference. First operand has 187 places, 311 transitions, 3670 flow. Second operand 7 states and 163 transitions. [2024-06-21 17:48:37,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 356 transitions, 4796 flow [2024-06-21 17:48:38,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 356 transitions, 4625 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:38,416 INFO L231 Difference]: Finished difference. Result has 189 places, 317 transitions, 3753 flow [2024-06-21 17:48:38,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3753, PETRI_PLACES=189, PETRI_TRANSITIONS=317} [2024-06-21 17:48:38,417 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 134 predicate places. [2024-06-21 17:48:38,417 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 317 transitions, 3753 flow [2024-06-21 17:48:38,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:38,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:38,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:38,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:48:38,418 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:38,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:38,418 INFO L85 PathProgramCache]: Analyzing trace with hash 333853230, now seen corresponding path program 2 times [2024-06-21 17:48:38,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:38,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384485230] [2024-06-21 17:48:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:38,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:41,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384485230] [2024-06-21 17:48:41,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384485230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:41,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:41,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:41,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479038979] [2024-06-21 17:48:41,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:41,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:41,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:41,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:41,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:41,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:41,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 317 transitions, 3753 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:41,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:41,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:41,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:44,580 INFO L124 PetriNetUnfolderBase]: 9504/13381 cut-off events. [2024-06-21 17:48:44,580 INFO L125 PetriNetUnfolderBase]: For 604668/604671 co-relation queries the response was YES. [2024-06-21 17:48:44,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100621 conditions, 13381 events. 9504/13381 cut-off events. For 604668/604671 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 73455 event pairs, 3098 based on Foata normal form. 6/13382 useless extension candidates. Maximal degree in co-relation 100533. Up to 13003 conditions per place. [2024-06-21 17:48:44,983 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 321 selfloop transitions, 25 changer transitions 0/352 dead transitions. [2024-06-21 17:48:44,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 352 transitions, 4631 flow [2024-06-21 17:48:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 17:48:44,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:48:44,987 INFO L175 Difference]: Start difference. First operand has 189 places, 317 transitions, 3753 flow. Second operand 7 states and 156 transitions. [2024-06-21 17:48:44,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 352 transitions, 4631 flow [2024-06-21 17:48:45,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 352 transitions, 4463 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-21 17:48:45,725 INFO L231 Difference]: Finished difference. Result has 193 places, 320 transitions, 3745 flow [2024-06-21 17:48:45,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3745, PETRI_PLACES=193, PETRI_TRANSITIONS=320} [2024-06-21 17:48:45,725 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 138 predicate places. [2024-06-21 17:48:45,726 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 320 transitions, 3745 flow [2024-06-21 17:48:45,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:45,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:45,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:45,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:48:45,726 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:45,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1221300080, now seen corresponding path program 3 times [2024-06-21 17:48:45,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:45,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658882459] [2024-06-21 17:48:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:45,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:48,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:48,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658882459] [2024-06-21 17:48:48,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658882459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:48,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:48,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:48,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110934259] [2024-06-21 17:48:48,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:48,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:48,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:48,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:48,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 320 transitions, 3745 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:48,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:48,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:48,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:51,420 INFO L124 PetriNetUnfolderBase]: 9492/13364 cut-off events. [2024-06-21 17:48:51,420 INFO L125 PetriNetUnfolderBase]: For 625127/625130 co-relation queries the response was YES. [2024-06-21 17:48:51,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100624 conditions, 13364 events. 9492/13364 cut-off events. For 625127/625130 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 73221 event pairs, 2946 based on Foata normal form. 6/13365 useless extension candidates. Maximal degree in co-relation 100534. Up to 12960 conditions per place. [2024-06-21 17:48:51,545 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 321 selfloop transitions, 24 changer transitions 0/351 dead transitions. [2024-06-21 17:48:51,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 351 transitions, 4523 flow [2024-06-21 17:48:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:48:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:48:51,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 17:48:51,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-21 17:48:51,547 INFO L175 Difference]: Start difference. First operand has 193 places, 320 transitions, 3745 flow. Second operand 6 states and 142 transitions. [2024-06-21 17:48:51,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 351 transitions, 4523 flow [2024-06-21 17:48:52,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 351 transitions, 4373 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:52,516 INFO L231 Difference]: Finished difference. Result has 194 places, 320 transitions, 3655 flow [2024-06-21 17:48:52,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3655, PETRI_PLACES=194, PETRI_TRANSITIONS=320} [2024-06-21 17:48:52,517 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2024-06-21 17:48:52,517 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 320 transitions, 3655 flow [2024-06-21 17:48:52,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:52,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:52,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:52,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:48:52,517 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:52,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:52,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1342335517, now seen corresponding path program 1 times [2024-06-21 17:48:52,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:52,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702937548] [2024-06-21 17:48:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:52,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:54,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:54,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702937548] [2024-06-21 17:48:54,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702937548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:54,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:54,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:48:54,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144581120] [2024-06-21 17:48:54,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:54,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:48:54,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:54,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:48:54,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:48:54,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 17:48:54,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 320 transitions, 3655 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:54,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:54,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 17:48:54,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:56,906 INFO L124 PetriNetUnfolderBase]: 8409/12164 cut-off events. [2024-06-21 17:48:56,907 INFO L125 PetriNetUnfolderBase]: For 639716/639806 co-relation queries the response was YES. [2024-06-21 17:48:56,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94001 conditions, 12164 events. 8409/12164 cut-off events. For 639716/639806 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70403 event pairs, 2809 based on Foata normal form. 8/11982 useless extension candidates. Maximal degree in co-relation 93910. Up to 10979 conditions per place. [2024-06-21 17:48:57,065 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 250 selfloop transitions, 20 changer transitions 0/337 dead transitions. [2024-06-21 17:48:57,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 337 transitions, 4239 flow [2024-06-21 17:48:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:48:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:48:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 17:48:57,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-21 17:48:57,067 INFO L175 Difference]: Start difference. First operand has 194 places, 320 transitions, 3655 flow. Second operand 6 states and 135 transitions. [2024-06-21 17:48:57,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 337 transitions, 4239 flow [2024-06-21 17:48:58,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 337 transitions, 4171 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:58,116 INFO L231 Difference]: Finished difference. Result has 195 places, 320 transitions, 3637 flow [2024-06-21 17:48:58,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3637, PETRI_PLACES=195, PETRI_TRANSITIONS=320} [2024-06-21 17:48:58,122 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 140 predicate places. [2024-06-21 17:48:58,122 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 320 transitions, 3637 flow [2024-06-21 17:48:58,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:58,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:58,123 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] [2024-06-21 17:48:58,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:48:58,123 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:58,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:58,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1289873482, now seen corresponding path program 1 times [2024-06-21 17:48:58,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:58,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022415031] [2024-06-21 17:48:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:58,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:01,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:01,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022415031] [2024-06-21 17:49:01,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022415031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:01,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:01,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:01,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396851986] [2024-06-21 17:49:01,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:01,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:01,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:01,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:01,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:01,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:01,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 320 transitions, 3637 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:01,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:01,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:01,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:05,343 INFO L124 PetriNetUnfolderBase]: 9403/13240 cut-off events. [2024-06-21 17:49:05,343 INFO L125 PetriNetUnfolderBase]: For 651413/651416 co-relation queries the response was YES. [2024-06-21 17:49:05,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100796 conditions, 13240 events. 9403/13240 cut-off events. For 651413/651416 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 72673 event pairs, 3002 based on Foata normal form. 4/13240 useless extension candidates. Maximal degree in co-relation 100704. Up to 12671 conditions per place. [2024-06-21 17:49:05,483 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 305 selfloop transitions, 66 changer transitions 0/377 dead transitions. [2024-06-21 17:49:05,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 377 transitions, 4645 flow [2024-06-21 17:49:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 17:49:05,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-21 17:49:05,490 INFO L175 Difference]: Start difference. First operand has 195 places, 320 transitions, 3637 flow. Second operand 8 states and 193 transitions. [2024-06-21 17:49:05,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 377 transitions, 4645 flow [2024-06-21 17:49:06,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 377 transitions, 4605 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:06,402 INFO L231 Difference]: Finished difference. Result has 199 places, 324 transitions, 3852 flow [2024-06-21 17:49:06,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3597, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3852, PETRI_PLACES=199, PETRI_TRANSITIONS=324} [2024-06-21 17:49:06,403 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-21 17:49:06,403 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 324 transitions, 3852 flow [2024-06-21 17:49:06,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:06,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:06,404 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] [2024-06-21 17:49:06,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:49:06,404 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:06,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1285404832, now seen corresponding path program 2 times [2024-06-21 17:49:06,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:06,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068428475] [2024-06-21 17:49:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:06,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:10,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:10,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068428475] [2024-06-21 17:49:10,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068428475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:10,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:10,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:10,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174286178] [2024-06-21 17:49:10,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:10,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:10,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:10,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:10,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:10,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:10,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 324 transitions, 3852 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:10,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:10,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:10,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:14,527 INFO L124 PetriNetUnfolderBase]: 9448/13298 cut-off events. [2024-06-21 17:49:14,527 INFO L125 PetriNetUnfolderBase]: For 693411/693423 co-relation queries the response was YES. [2024-06-21 17:49:14,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104091 conditions, 13298 events. 9448/13298 cut-off events. For 693411/693423 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 73060 event pairs, 3020 based on Foata normal form. 10/13299 useless extension candidates. Maximal degree in co-relation 103999. Up to 12378 conditions per place. [2024-06-21 17:49:14,769 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 256 selfloop transitions, 128 changer transitions 0/390 dead transitions. [2024-06-21 17:49:14,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 390 transitions, 5434 flow [2024-06-21 17:49:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 17:49:14,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-21 17:49:14,771 INFO L175 Difference]: Start difference. First operand has 199 places, 324 transitions, 3852 flow. Second operand 8 states and 197 transitions. [2024-06-21 17:49:14,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 390 transitions, 5434 flow [2024-06-21 17:49:15,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 390 transitions, 5209 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:15,706 INFO L231 Difference]: Finished difference. Result has 201 places, 336 transitions, 4242 flow [2024-06-21 17:49:15,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3627, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4242, PETRI_PLACES=201, PETRI_TRANSITIONS=336} [2024-06-21 17:49:15,708 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2024-06-21 17:49:15,708 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 336 transitions, 4242 flow [2024-06-21 17:49:15,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:15,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:15,708 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] [2024-06-21 17:49:15,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:49:15,708 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:15,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:15,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1285135721, now seen corresponding path program 1 times [2024-06-21 17:49:15,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:15,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745902234] [2024-06-21 17:49:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:15,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:19,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745902234] [2024-06-21 17:49:19,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745902234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:19,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:19,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:19,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842641718] [2024-06-21 17:49:19,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:19,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:19,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:19,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:19,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 336 transitions, 4242 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:19,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:19,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:19,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:23,425 INFO L124 PetriNetUnfolderBase]: 9872/13855 cut-off events. [2024-06-21 17:49:23,426 INFO L125 PetriNetUnfolderBase]: For 773356/773368 co-relation queries the response was YES. [2024-06-21 17:49:23,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111774 conditions, 13855 events. 9872/13855 cut-off events. For 773356/773368 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 76038 event pairs, 3020 based on Foata normal form. 16/13862 useless extension candidates. Maximal degree in co-relation 111681. Up to 12627 conditions per place. [2024-06-21 17:49:23,804 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 311 selfloop transitions, 134 changer transitions 0/451 dead transitions. [2024-06-21 17:49:23,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 451 transitions, 6476 flow [2024-06-21 17:49:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:49:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:49:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-21 17:49:23,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562937062937063 [2024-06-21 17:49:23,821 INFO L175 Difference]: Start difference. First operand has 201 places, 336 transitions, 4242 flow. Second operand 11 states and 261 transitions. [2024-06-21 17:49:23,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 451 transitions, 6476 flow [2024-06-21 17:49:24,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 451 transitions, 6239 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:24,921 INFO L231 Difference]: Finished difference. Result has 212 places, 374 transitions, 4904 flow [2024-06-21 17:49:24,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4904, PETRI_PLACES=212, PETRI_TRANSITIONS=374} [2024-06-21 17:49:24,922 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 157 predicate places. [2024-06-21 17:49:24,922 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 374 transitions, 4904 flow [2024-06-21 17:49:24,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:24,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:24,922 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] [2024-06-21 17:49:24,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:49:24,922 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:24,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1285136062, now seen corresponding path program 3 times [2024-06-21 17:49:24,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:24,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159385216] [2024-06-21 17:49:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:24,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:28,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:28,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159385216] [2024-06-21 17:49:28,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159385216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:28,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:28,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:28,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511818022] [2024-06-21 17:49:28,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:28,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:28,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:28,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:28,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 374 transitions, 4904 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:28,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:28,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:28,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:32,637 INFO L124 PetriNetUnfolderBase]: 9891/13887 cut-off events. [2024-06-21 17:49:32,639 INFO L125 PetriNetUnfolderBase]: For 816161/816173 co-relation queries the response was YES. [2024-06-21 17:49:32,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116475 conditions, 13887 events. 9891/13887 cut-off events. For 816161/816173 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 76289 event pairs, 3065 based on Foata normal form. 10/13888 useless extension candidates. Maximal degree in co-relation 116377. Up to 12944 conditions per place. [2024-06-21 17:49:32,773 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 292 selfloop transitions, 130 changer transitions 0/428 dead transitions. [2024-06-21 17:49:32,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 428 transitions, 6308 flow [2024-06-21 17:49:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 17:49:32,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-21 17:49:32,775 INFO L175 Difference]: Start difference. First operand has 212 places, 374 transitions, 4904 flow. Second operand 8 states and 193 transitions. [2024-06-21 17:49:32,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 428 transitions, 6308 flow [2024-06-21 17:49:33,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 428 transitions, 6025 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:33,743 INFO L231 Difference]: Finished difference. Result has 215 places, 378 transitions, 4974 flow [2024-06-21 17:49:33,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4621, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4974, PETRI_PLACES=215, PETRI_TRANSITIONS=378} [2024-06-21 17:49:33,744 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 160 predicate places. [2024-06-21 17:49:33,744 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 378 transitions, 4974 flow [2024-06-21 17:49:33,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:33,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:33,745 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] [2024-06-21 17:49:33,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:49:33,745 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:33,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:33,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1320837037, now seen corresponding path program 2 times [2024-06-21 17:49:33,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:33,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851137279] [2024-06-21 17:49:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:33,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:37,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:37,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851137279] [2024-06-21 17:49:37,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851137279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:37,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:37,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:37,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149026851] [2024-06-21 17:49:37,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:37,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:37,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:37,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:37,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:37,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:37,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 378 transitions, 4974 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:37,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:37,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:37,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:42,136 INFO L124 PetriNetUnfolderBase]: 10371/14553 cut-off events. [2024-06-21 17:49:42,136 INFO L125 PetriNetUnfolderBase]: For 892534/892537 co-relation queries the response was YES. [2024-06-21 17:49:42,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122908 conditions, 14553 events. 10371/14553 cut-off events. For 892534/892537 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 80153 event pairs, 3026 based on Foata normal form. 18/14567 useless extension candidates. Maximal degree in co-relation 122808. Up to 13131 conditions per place. [2024-06-21 17:49:42,296 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 357 selfloop transitions, 123 changer transitions 0/486 dead transitions. [2024-06-21 17:49:42,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 486 transitions, 7126 flow [2024-06-21 17:49:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:49:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:49:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 285 transitions. [2024-06-21 17:49:42,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2024-06-21 17:49:42,298 INFO L175 Difference]: Start difference. First operand has 215 places, 378 transitions, 4974 flow. Second operand 12 states and 285 transitions. [2024-06-21 17:49:42,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 486 transitions, 7126 flow [2024-06-21 17:49:43,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 486 transitions, 6915 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:43,445 INFO L231 Difference]: Finished difference. Result has 224 places, 405 transitions, 5559 flow [2024-06-21 17:49:43,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4763, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5559, PETRI_PLACES=224, PETRI_TRANSITIONS=405} [2024-06-21 17:49:43,445 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 169 predicate places. [2024-06-21 17:49:43,445 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 405 transitions, 5559 flow [2024-06-21 17:49:43,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:43,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:43,446 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] [2024-06-21 17:49:43,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:49:43,446 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:43,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:43,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1176738776, now seen corresponding path program 4 times [2024-06-21 17:49:43,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:43,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311979737] [2024-06-21 17:49:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:43,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:47,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:47,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311979737] [2024-06-21 17:49:47,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311979737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:47,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:47,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:47,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189668671] [2024-06-21 17:49:47,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:47,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:47,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:47,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:47,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:47,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:47,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 405 transitions, 5559 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:47,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:47,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:47,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:51,425 INFO L124 PetriNetUnfolderBase]: 10390/14603 cut-off events. [2024-06-21 17:49:51,426 INFO L125 PetriNetUnfolderBase]: For 937230/937233 co-relation queries the response was YES. [2024-06-21 17:49:51,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127146 conditions, 14603 events. 10390/14603 cut-off events. For 937230/937233 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 80781 event pairs, 3135 based on Foata normal form. 4/14603 useless extension candidates. Maximal degree in co-relation 127044. Up to 13958 conditions per place. [2024-06-21 17:49:51,589 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 378 selfloop transitions, 68 changer transitions 0/452 dead transitions. [2024-06-21 17:49:51,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 452 transitions, 6675 flow [2024-06-21 17:49:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 17:49:51,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:49:51,591 INFO L175 Difference]: Start difference. First operand has 224 places, 405 transitions, 5559 flow. Second operand 8 states and 182 transitions. [2024-06-21 17:49:51,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 452 transitions, 6675 flow [2024-06-21 17:49:53,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 452 transitions, 6356 flow, removed 130 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:53,482 INFO L231 Difference]: Finished difference. Result has 227 places, 409 transitions, 5482 flow [2024-06-21 17:49:53,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5240, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5482, PETRI_PLACES=227, PETRI_TRANSITIONS=409} [2024-06-21 17:49:53,483 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 172 predicate places. [2024-06-21 17:49:53,483 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 409 transitions, 5482 flow [2024-06-21 17:49:53,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:53,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:53,483 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] [2024-06-21 17:49:53,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:49:53,483 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:53,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1137526121, now seen corresponding path program 3 times [2024-06-21 17:49:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:53,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22032186] [2024-06-21 17:49:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:57,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:57,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22032186] [2024-06-21 17:49:57,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22032186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:57,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:57,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:57,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744757293] [2024-06-21 17:49:57,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:57,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:57,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:57,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:57,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:57,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:57,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 409 transitions, 5482 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:57,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:57,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:57,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:01,506 INFO L124 PetriNetUnfolderBase]: 10354/14546 cut-off events. [2024-06-21 17:50:01,506 INFO L125 PetriNetUnfolderBase]: For 955818/955821 co-relation queries the response was YES. [2024-06-21 17:50:01,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125093 conditions, 14546 events. 10354/14546 cut-off events. For 955818/955821 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 80334 event pairs, 3042 based on Foata normal form. 18/14560 useless extension candidates. Maximal degree in co-relation 124989. Up to 13136 conditions per place. [2024-06-21 17:50:01,999 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 351 selfloop transitions, 120 changer transitions 0/477 dead transitions. [2024-06-21 17:50:01,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 477 transitions, 6929 flow [2024-06-21 17:50:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-21 17:50:02,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653846153846154 [2024-06-21 17:50:02,001 INFO L175 Difference]: Start difference. First operand has 227 places, 409 transitions, 5482 flow. Second operand 10 states and 242 transitions. [2024-06-21 17:50:02,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 477 transitions, 6929 flow [2024-06-21 17:50:03,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 477 transitions, 6657 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:03,507 INFO L231 Difference]: Finished difference. Result has 231 places, 409 transitions, 5468 flow [2024-06-21 17:50:03,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5210, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5468, PETRI_PLACES=231, PETRI_TRANSITIONS=409} [2024-06-21 17:50:03,508 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 176 predicate places. [2024-06-21 17:50:03,508 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 409 transitions, 5468 flow [2024-06-21 17:50:03,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:03,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:03,508 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] [2024-06-21 17:50:03,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:50:03,509 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:50:03,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1290879473, now seen corresponding path program 1 times [2024-06-21 17:50:03,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:03,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501078090] [2024-06-21 17:50:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:03,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat