./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe020_power.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/mutex-meet-nonrel/safe020_power.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/safe020_power.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_power.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 21:59:28,177 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:59:28,241 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:59:28,245 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:59:28,245 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:59:28,267 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:59:28,267 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:59:28,268 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:59:28,268 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:59:28,271 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:59:28,271 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:59:28,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:59:28,272 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:59:28,273 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:59:28,273 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:59:28,273 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:59:28,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:59:28,274 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:59:28,274 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:59:28,274 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:59:28,275 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:59:28,275 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:59:28,275 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:59:28,276 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:59:28,276 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:59:28,276 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:59:28,276 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:59:28,276 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:59:28,277 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:59:28,277 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:59:28,278 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:59:28,278 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:59:28,278 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:59:28,278 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:59:28,278 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:59:28,278 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:59:28,279 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:59:28,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:59:28,279 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:59:28,279 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:59:28,279 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:59:28,279 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:59:28,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:59:28,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:59:28,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:59:28,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:59:28,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:59:28,568 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:59:28,568 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:59:28,569 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_power.i [2024-06-21 21:59:29,529 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:59:29,741 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:59:29,745 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_power.i [2024-06-21 21:59:29,756 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/267b44c2f/9c6602c0e7cc4c2781952a2d64a221fa/FLAG5d7633640 [2024-06-21 21:59:29,770 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/267b44c2f/9c6602c0e7cc4c2781952a2d64a221fa [2024-06-21 21:59:29,772 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:59:29,772 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:59:29,773 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe020_power.yml/witness.yml [2024-06-21 21:59:29,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:59:29,929 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:59:29,930 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:59:29,931 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:59:29,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:59:29,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:59:29" (1/2) ... [2024-06-21 21:59:29,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e08a088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:59:29, skipping insertion in model container [2024-06-21 21:59:29,936 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:59:29" (1/2) ... [2024-06-21 21:59:29,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@28a0922d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:59:29, skipping insertion in model container [2024-06-21 21:59:29,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:59:29" (2/2) ... [2024-06-21 21:59:29,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e08a088 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:29, skipping insertion in model container [2024-06-21 21:59:29,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:59:29" (2/2) ... [2024-06-21 21:59:29,938 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:59:30,053 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:59:30,055 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] (((((((((((((((((((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-21 21:59:30,055 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] (((((((((((((((((((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-21 21:59:30,055 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-21 21:59:30,055 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:59:30,055 INFO L106 edCorrectnessWitness]: ghost_update [L860-L860] multithreaded = 1; [2024-06-21 21:59:30,091 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:59:30,428 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:59:30,448 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:59:30,658 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:59:30,701 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:59:30,701 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30 WrapperNode [2024-06-21 21:59:30,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:59:30,702 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:59:30,703 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:59:30,703 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:59:30,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,729 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,770 INFO L138 Inliner]: procedures = 175, calls = 90, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2024-06-21 21:59:30,772 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:59:30,773 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:59:30,773 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:59:30,774 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:59:30,789 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,803 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,836 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-21 21:59:30,836 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,849 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,859 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,870 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,872 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,883 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:59:30,884 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:59:30,884 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:59:30,884 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:59:30,900 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (1/1) ... [2024-06-21 21:59:30,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:59:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:59:30,923 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 21:59:30,980 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 21:59:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:59:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:59:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:59:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:59:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:59:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:59:30,993 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:59:30,993 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:59:30,993 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:59:30,993 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:59:30,993 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:59:30,993 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:59:30,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:59:30,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:59:30,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:59:30,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:59:30,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:59:30,995 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 21:59:31,109 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:59:31,111 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:59:31,696 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:59:31,697 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:59:32,094 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:59:32,094 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:59:32,095 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:59:32 BoogieIcfgContainer [2024-06-21 21:59:32,095 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:59:32,097 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:59:32,097 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:59:32,100 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:59:32,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:59:29" (1/4) ... [2024-06-21 21:59:32,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4c554a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:59:32, skipping insertion in model container [2024-06-21 21:59:32,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:59:29" (2/4) ... [2024-06-21 21:59:32,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4c554a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:59:32, skipping insertion in model container [2024-06-21 21:59:32,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:59:30" (3/4) ... [2024-06-21 21:59:32,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4c554a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:59:32, skipping insertion in model container [2024-06-21 21:59:32,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:59:32" (4/4) ... [2024-06-21 21:59:32,102 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_power.i [2024-06-21 21:59:32,116 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:59:32,116 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:59:32,116 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:59:32,177 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:59:32,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:59:32,232 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 21:59:32,232 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:59:32,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:59:32,235 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:59:32,237 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 21:59:32,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:59:32,249 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;@4413c55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:59:32,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:59:32,253 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:59:32,254 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:59:32,254 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:59:32,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:32,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:59:32,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:32,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:32,262 INFO L85 PathProgramCache]: Analyzing trace with hash 884604256, now seen corresponding path program 1 times [2024-06-21 21:59:32,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:32,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171656644] [2024-06-21 21:59:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:32,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:33,718 INFO 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 21:59:33,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:33,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171656644] [2024-06-21 21:59:33,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171656644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:33,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:33,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:59:33,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845788843] [2024-06-21 21:59:33,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:33,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:59:33,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:33,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:59:33,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:59:33,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:59:33,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:33,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:33,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:59:33,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:34,253 INFO L124 PetriNetUnfolderBase]: 1160/1782 cut-off events. [2024-06-21 21:59:34,253 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 21:59:34,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3607 conditions, 1782 events. 1160/1782 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8370 event pairs, 777 based on Foata normal form. 1/1752 useless extension candidates. Maximal degree in co-relation 3595. Up to 1748 conditions per place. [2024-06-21 21:59:34,282 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 21:59:34,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 183 flow [2024-06-21 21:59:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:59:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:59:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-21 21:59:34,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-21 21:59:34,292 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 69 transitions. [2024-06-21 21:59:34,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 183 flow [2024-06-21 21:59:34,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:59:34,296 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 21:59:34,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 21:59:34,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 21:59:34,300 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 21:59:34,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:34,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:34,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:34,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:59:34,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:34,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:34,301 INFO L85 PathProgramCache]: Analyzing trace with hash -298776865, now seen corresponding path program 1 times [2024-06-21 21:59:34,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:34,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146481596] [2024-06-21 21:59:34,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:34,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:35,375 INFO 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 21:59:35,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:35,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146481596] [2024-06-21 21:59:35,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146481596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:35,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:35,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:59:35,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339031831] [2024-06-21 21:59:35,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:35,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:59:35,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:35,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:59:35,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:59:35,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:59:35,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:35,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:35,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:59:35,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:35,810 INFO L124 PetriNetUnfolderBase]: 1148/1764 cut-off events. [2024-06-21 21:59:35,811 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-21 21:59:35,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1764 events. 1148/1764 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8281 event pairs, 521 based on Foata normal form. 6/1768 useless extension candidates. Maximal degree in co-relation 4046. Up to 1692 conditions per place. [2024-06-21 21:59:35,821 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-21 21:59:35,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-21 21:59:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:59:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:59:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-21 21:59:35,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-21 21:59:35,825 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-21 21:59:35,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-21 21:59:35,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:59:35,828 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 21:59:35,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 21:59:35,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 21:59:35,831 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 21:59:35,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:35,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:35,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:35,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:59:35,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:35,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:35,839 INFO L85 PathProgramCache]: Analyzing trace with hash -772733475, now seen corresponding path program 1 times [2024-06-21 21:59:35,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:35,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881583956] [2024-06-21 21:59:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:35,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:37,806 INFO 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 21:59:37,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:37,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881583956] [2024-06-21 21:59:37,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881583956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:37,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:37,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:59:37,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225220813] [2024-06-21 21:59:37,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:37,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:59:37,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:59:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:59:37,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:59:37,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:37,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:37,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:59:37,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:38,482 INFO L124 PetriNetUnfolderBase]: 1139/1749 cut-off events. [2024-06-21 21:59:38,483 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-21 21:59:38,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 1749 events. 1139/1749 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8150 event pairs, 375 based on Foata normal form. 6/1753 useless extension candidates. Maximal degree in co-relation 4479. Up to 1639 conditions per place. [2024-06-21 21:59:38,491 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 21:59:38,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 380 flow [2024-06-21 21:59:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:59:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:59:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 21:59:38,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-21 21:59:38,494 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 127 transitions. [2024-06-21 21:59:38,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 380 flow [2024-06-21 21:59:38,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 21:59:38,496 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 21:59:38,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 21:59:38,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 21:59:38,497 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 21:59:38,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:38,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:38,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:38,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:59:38,497 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:38,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:38,498 INFO L85 PathProgramCache]: Analyzing trace with hash -952377265, now seen corresponding path program 1 times [2024-06-21 21:59:38,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:38,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771684181] [2024-06-21 21:59:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:38,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:39,679 INFO 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 21:59:39,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:39,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771684181] [2024-06-21 21:59:39,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771684181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:39,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:39,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:59:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672395110] [2024-06-21 21:59:39,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:39,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:59:39,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:59:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:59:39,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:59:39,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 21:59:39,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:39,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:59:39,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:40,269 INFO L124 PetriNetUnfolderBase]: 1134/1742 cut-off events. [2024-06-21 21:59:40,269 INFO L125 PetriNetUnfolderBase]: For 1858/1858 co-relation queries the response was YES. [2024-06-21 21:59:40,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4932 conditions, 1742 events. 1134/1742 cut-off events. For 1858/1858 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8098 event pairs, 464 based on Foata normal form. 2/1742 useless extension candidates. Maximal degree in co-relation 4915. Up to 1697 conditions per place. [2024-06-21 21:59:40,279 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-21 21:59:40,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 339 flow [2024-06-21 21:59:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:59:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:59:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 21:59:40,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 21:59:40,281 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 89 transitions. [2024-06-21 21:59:40,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 339 flow [2024-06-21 21:59:40,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 312 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:59:40,287 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 21:59:40,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 21:59:40,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 21:59:40,288 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 21:59:40,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 21:59:40,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:40,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:40,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:59:40,289 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:40,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:40,290 INFO L85 PathProgramCache]: Analyzing trace with hash 541077699, now seen corresponding path program 1 times [2024-06-21 21:59:40,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:40,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343176012] [2024-06-21 21:59:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:42,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:42,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343176012] [2024-06-21 21:59:42,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343176012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:42,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:42,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:59:42,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885585771] [2024-06-21 21:59:42,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:42,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:59:42,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:42,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:59:42,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:59:42,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:59:42,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:42,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:42,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:59:42,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:42,607 INFO L124 PetriNetUnfolderBase]: 1129/1735 cut-off events. [2024-06-21 21:59:42,607 INFO L125 PetriNetUnfolderBase]: For 2654/2654 co-relation queries the response was YES. [2024-06-21 21:59:42,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5294 conditions, 1735 events. 1129/1735 cut-off events. For 2654/2654 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8049 event pairs, 446 based on Foata normal form. 2/1735 useless extension candidates. Maximal degree in co-relation 5275. Up to 1679 conditions per place. [2024-06-21 21:59:42,618 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-21 21:59:42,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 388 flow [2024-06-21 21:59:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:59:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:59:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 21:59:42,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:59:42,623 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 105 transitions. [2024-06-21 21:59:42,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 388 flow [2024-06-21 21:59:42,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 368 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:59:42,628 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-21 21:59:42,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-21 21:59:42,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-21 21:59:42,631 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-21 21:59:42,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:42,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:42,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:42,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:59:42,631 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:42,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:42,632 INFO L85 PathProgramCache]: Analyzing trace with hash -413133810, now seen corresponding path program 1 times [2024-06-21 21:59:42,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:42,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498495651] [2024-06-21 21:59:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:42,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:44,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:44,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498495651] [2024-06-21 21:59:44,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498495651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:44,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:44,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:59:44,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763971635] [2024-06-21 21:59:44,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:44,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:59:44,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:44,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:59:44,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:59:44,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:59:44,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:44,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:44,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:59:44,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:44,793 INFO L124 PetriNetUnfolderBase]: 1155/1785 cut-off events. [2024-06-21 21:59:44,793 INFO L125 PetriNetUnfolderBase]: For 3767/3767 co-relation queries the response was YES. [2024-06-21 21:59:44,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5866 conditions, 1785 events. 1155/1785 cut-off events. For 3767/3767 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8335 event pairs, 428 based on Foata normal form. 4/1787 useless extension candidates. Maximal degree in co-relation 5846. Up to 1698 conditions per place. [2024-06-21 21:59:44,804 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-21 21:59:44,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 454 flow [2024-06-21 21:59:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:59:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:59:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 21:59:44,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:59:44,807 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 6 states and 110 transitions. [2024-06-21 21:59:44,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 454 flow [2024-06-21 21:59:44,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 424 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:44,811 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 258 flow [2024-06-21 21:59:44,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-21 21:59:44,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 21:59:44,813 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 258 flow [2024-06-21 21:59:44,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:44,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:44,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:44,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:59:44,814 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:44,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:44,815 INFO L85 PathProgramCache]: Analyzing trace with hash -412954320, now seen corresponding path program 2 times [2024-06-21 21:59:44,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:44,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566389861] [2024-06-21 21:59:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:44,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:46,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:46,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566389861] [2024-06-21 21:59:46,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566389861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:46,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:46,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:59:46,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190687717] [2024-06-21 21:59:46,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:46,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:59:46,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:59:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:59:46,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:59:46,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:46,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:46,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:59:46,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:46,969 INFO L124 PetriNetUnfolderBase]: 1163/1796 cut-off events. [2024-06-21 21:59:46,969 INFO L125 PetriNetUnfolderBase]: For 5165/5165 co-relation queries the response was YES. [2024-06-21 21:59:46,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6353 conditions, 1796 events. 1163/1796 cut-off events. For 5165/5165 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8460 event pairs, 437 based on Foata normal form. 4/1796 useless extension candidates. Maximal degree in co-relation 6332. Up to 1677 conditions per place. [2024-06-21 21:59:46,978 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 21:59:46,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 480 flow [2024-06-21 21:59:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:59:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:59:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 21:59:46,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 21:59:46,980 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 258 flow. Second operand 6 states and 109 transitions. [2024-06-21 21:59:46,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 480 flow [2024-06-21 21:59:46,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 448 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:46,984 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 298 flow [2024-06-21 21:59:46,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-21 21:59:46,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 21:59:46,985 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 298 flow [2024-06-21 21:59:46,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:46,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:46,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:46,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:59:46,986 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:46,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:46,986 INFO L85 PathProgramCache]: Analyzing trace with hash -406458642, now seen corresponding path program 1 times [2024-06-21 21:59:46,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:46,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348688750] [2024-06-21 21:59:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:49,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:49,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348688750] [2024-06-21 21:59:49,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348688750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:49,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:49,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:49,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794072915] [2024-06-21 21:59:49,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:49,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:49,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:49,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:59:49,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:49,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:49,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:59:49,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:49,920 INFO L124 PetriNetUnfolderBase]: 1155/1791 cut-off events. [2024-06-21 21:59:49,921 INFO L125 PetriNetUnfolderBase]: For 6606/6606 co-relation queries the response was YES. [2024-06-21 21:59:49,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6715 conditions, 1791 events. 1155/1791 cut-off events. For 6606/6606 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8397 event pairs, 409 based on Foata normal form. 4/1793 useless extension candidates. Maximal degree in co-relation 6693. Up to 1695 conditions per place. [2024-06-21 21:59:49,935 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 64 selfloop transitions, 13 changer transitions 0/82 dead transitions. [2024-06-21 21:59:49,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 536 flow [2024-06-21 21:59:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:59:49,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:59:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:59:49,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 21:59:49,939 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 298 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:59:49,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 536 flow [2024-06-21 21:59:49,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 488 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:49,945 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 311 flow [2024-06-21 21:59:49,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-21 21:59:49,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 21:59:49,948 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 311 flow [2024-06-21 21:59:49,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:49,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:49,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:49,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:59:49,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:49,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:49,952 INFO L85 PathProgramCache]: Analyzing trace with hash 77755620, now seen corresponding path program 1 times [2024-06-21 21:59:49,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:49,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318590155] [2024-06-21 21:59:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:49,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:52,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:52,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318590155] [2024-06-21 21:59:52,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318590155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:52,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:52,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:52,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491331385] [2024-06-21 21:59:52,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:52,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:52,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:52,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:52,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:52,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:59:52,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 311 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:52,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:52,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:59:52,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:52,894 INFO L124 PetriNetUnfolderBase]: 1168/1810 cut-off events. [2024-06-21 21:59:52,894 INFO L125 PetriNetUnfolderBase]: For 7993/7993 co-relation queries the response was YES. [2024-06-21 21:59:52,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6999 conditions, 1810 events. 1168/1810 cut-off events. For 7993/7993 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8500 event pairs, 406 based on Foata normal form. 2/1810 useless extension candidates. Maximal degree in co-relation 6976. Up to 1717 conditions per place. [2024-06-21 21:59:52,910 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-06-21 21:59:52,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 561 flow [2024-06-21 21:59:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:59:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:59:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 21:59:52,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:59:52,912 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 311 flow. Second operand 6 states and 110 transitions. [2024-06-21 21:59:52,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 561 flow [2024-06-21 21:59:52,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 518 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 21:59:52,917 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 339 flow [2024-06-21 21:59:52,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-06-21 21:59:52,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-21 21:59:52,918 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 339 flow [2024-06-21 21:59:52,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:52,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:52,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:52,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:59:52,921 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:52,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:52,922 INFO L85 PathProgramCache]: Analyzing trace with hash 284409060, now seen corresponding path program 2 times [2024-06-21 21:59:52,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:52,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701181592] [2024-06-21 21:59:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:52,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:54,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701181592] [2024-06-21 21:59:54,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701181592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:54,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:54,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:54,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488932430] [2024-06-21 21:59:54,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:54,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:54,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:54,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:54,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:59:54,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 339 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:54,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:54,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:59:54,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:55,322 INFO L124 PetriNetUnfolderBase]: 1194/1847 cut-off events. [2024-06-21 21:59:55,322 INFO L125 PetriNetUnfolderBase]: For 9893/9893 co-relation queries the response was YES. [2024-06-21 21:59:55,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7543 conditions, 1847 events. 1194/1847 cut-off events. For 9893/9893 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8688 event pairs, 415 based on Foata normal form. 4/1847 useless extension candidates. Maximal degree in co-relation 7519. Up to 1700 conditions per place. [2024-06-21 21:59:55,332 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 21 changer transitions 0/91 dead transitions. [2024-06-21 21:59:55,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 622 flow [2024-06-21 21:59:55,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:59:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:59:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:59:55,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:59:55,334 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 339 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:59:55,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 622 flow [2024-06-21 21:59:55,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 582 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:55,344 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 401 flow [2024-06-21 21:59:55,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=401, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-21 21:59:55,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 21:59:55,346 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 401 flow [2024-06-21 21:59:55,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:55,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:55,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:55,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:59:55,347 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:55,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:55,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1141766562, now seen corresponding path program 3 times [2024-06-21 21:59:55,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:55,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009139280] [2024-06-21 21:59:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:55,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:57,300 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 21:59:57,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:57,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009139280] [2024-06-21 21:59:57,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009139280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:57,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:57,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:57,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232964420] [2024-06-21 21:59:57,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:57,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:57,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:57,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:57,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:57,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:59:57,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 401 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:57,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:57,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:59:57,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:58,128 INFO L124 PetriNetUnfolderBase]: 1207/1866 cut-off events. [2024-06-21 21:59:58,128 INFO L125 PetriNetUnfolderBase]: For 12289/12289 co-relation queries the response was YES. [2024-06-21 21:59:58,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8223 conditions, 1866 events. 1207/1866 cut-off events. For 12289/12289 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8789 event pairs, 415 based on Foata normal form. 2/1864 useless extension candidates. Maximal degree in co-relation 8198. Up to 1673 conditions per place. [2024-06-21 21:59:58,138 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 33 changer transitions 0/104 dead transitions. [2024-06-21 21:59:58,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 803 flow [2024-06-21 21:59:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:59:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:59:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 21:59:58,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 21:59:58,140 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 401 flow. Second operand 8 states and 146 transitions. [2024-06-21 21:59:58,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 803 flow [2024-06-21 21:59:58,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 104 transitions, 734 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 21:59:58,146 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 514 flow [2024-06-21 21:59:58,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=514, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-21 21:59:58,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 21:59:58,147 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 514 flow [2024-06-21 21:59:58,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:58,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:58,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:58,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:59:58,148 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:58,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:58,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2007542959, now seen corresponding path program 1 times [2024-06-21 21:59:58,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:58,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19599455] [2024-06-21 21:59:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:58,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:59,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:59,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19599455] [2024-06-21 21:59:59,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19599455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:59,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:59,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:59:59,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415350037] [2024-06-21 21:59:59,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:59,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:59:59,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:59:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:59:59,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:59:59,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 514 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:59,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:59,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:59:59,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:00,652 INFO L124 PetriNetUnfolderBase]: 1265/1973 cut-off events. [2024-06-21 22:00:00,652 INFO L125 PetriNetUnfolderBase]: For 15246/15246 co-relation queries the response was YES. [2024-06-21 22:00:00,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9190 conditions, 1973 events. 1265/1973 cut-off events. For 15246/15246 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9427 event pairs, 406 based on Foata normal form. 2/1973 useless extension candidates. Maximal degree in co-relation 9163. Up to 1825 conditions per place. [2024-06-21 22:00:00,662 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 92 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2024-06-21 22:00:00,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 935 flow [2024-06-21 22:00:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:00:00,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:00:00,664 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 514 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:00:00,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 935 flow [2024-06-21 22:00:00,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 884 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 22:00:00,676 INFO L231 Difference]: Finished difference. Result has 76 places, 86 transitions, 648 flow [2024-06-21 22:00:00,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=648, PETRI_PLACES=76, PETRI_TRANSITIONS=86} [2024-06-21 22:00:00,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 22:00:00,676 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 86 transitions, 648 flow [2024-06-21 22:00:00,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:00,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:00,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:00,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 22:00:00,677 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:00,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash 798666993, now seen corresponding path program 2 times [2024-06-21 22:00:00,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:00,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715365993] [2024-06-21 22:00:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:00,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:02,407 INFO 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 22:00:02,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:02,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715365993] [2024-06-21 22:00:02,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715365993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:02,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:02,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:00:02,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611044965] [2024-06-21 22:00:02,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:02,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:00:02,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:00:02,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:00:02,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:02,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 86 transitions, 648 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:02,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:02,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:02,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:03,273 INFO L124 PetriNetUnfolderBase]: 1260/1966 cut-off events. [2024-06-21 22:00:03,274 INFO L125 PetriNetUnfolderBase]: For 17948/17948 co-relation queries the response was YES. [2024-06-21 22:00:03,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9694 conditions, 1966 events. 1260/1966 cut-off events. For 17948/17948 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9375 event pairs, 388 based on Foata normal form. 2/1966 useless extension candidates. Maximal degree in co-relation 9663. Up to 1801 conditions per place. [2024-06-21 22:00:03,286 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 90 selfloop transitions, 26 changer transitions 0/121 dead transitions. [2024-06-21 22:00:03,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 1026 flow [2024-06-21 22:00:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:00:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:00:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 22:00:03,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 22:00:03,289 INFO L175 Difference]: Start difference. First operand has 76 places, 86 transitions, 648 flow. Second operand 7 states and 129 transitions. [2024-06-21 22:00:03,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 1026 flow [2024-06-21 22:00:03,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 964 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 22:00:03,304 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 707 flow [2024-06-21 22:00:03,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=707, PETRI_PLACES=80, PETRI_TRANSITIONS=89} [2024-06-21 22:00:03,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 22:00:03,305 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 89 transitions, 707 flow [2024-06-21 22:00:03,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:03,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:03,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:03,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 22:00:03,306 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:03,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:03,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1884541203, now seen corresponding path program 1 times [2024-06-21 22:00:03,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:03,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087323158] [2024-06-21 22:00:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:03,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:05,012 INFO 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 22:00:05,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:05,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087323158] [2024-06-21 22:00:05,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087323158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:05,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:05,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:05,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420528411] [2024-06-21 22:00:05,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:05,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:05,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:05,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:05,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:05,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:05,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 89 transitions, 707 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:05,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:05,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:05,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:05,933 INFO L124 PetriNetUnfolderBase]: 1363/2139 cut-off events. [2024-06-21 22:00:05,933 INFO L125 PetriNetUnfolderBase]: For 24845/24845 co-relation queries the response was YES. [2024-06-21 22:00:05,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10957 conditions, 2139 events. 1363/2139 cut-off events. For 24845/24845 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10537 event pairs, 396 based on Foata normal form. 26/2163 useless extension candidates. Maximal degree in co-relation 10925. Up to 1825 conditions per place. [2024-06-21 22:00:05,949 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 102 selfloop transitions, 23 changer transitions 0/130 dead transitions. [2024-06-21 22:00:05,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 130 transitions, 1139 flow [2024-06-21 22:00:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 22:00:05,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 22:00:05,951 INFO L175 Difference]: Start difference. First operand has 80 places, 89 transitions, 707 flow. Second operand 8 states and 149 transitions. [2024-06-21 22:00:05,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 130 transitions, 1139 flow [2024-06-21 22:00:05,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 130 transitions, 1014 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 22:00:05,978 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 695 flow [2024-06-21 22:00:05,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=695, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2024-06-21 22:00:05,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-21 22:00:05,979 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 695 flow [2024-06-21 22:00:05,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:05,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:05,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:05,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 22:00:05,979 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:05,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:05,980 INFO L85 PathProgramCache]: Analyzing trace with hash 226748141, now seen corresponding path program 2 times [2024-06-21 22:00:05,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:05,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338102818] [2024-06-21 22:00:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:05,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:08,079 INFO 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 22:00:08,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:08,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338102818] [2024-06-21 22:00:08,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338102818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:08,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:08,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:08,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966740675] [2024-06-21 22:00:08,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:08,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:08,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:08,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:08,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:08,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:08,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 695 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:08,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:08,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:08,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:08,907 INFO L124 PetriNetUnfolderBase]: 1471/2314 cut-off events. [2024-06-21 22:00:08,908 INFO L125 PetriNetUnfolderBase]: For 28589/28589 co-relation queries the response was YES. [2024-06-21 22:00:08,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11872 conditions, 2314 events. 1471/2314 cut-off events. For 28589/28589 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11639 event pairs, 417 based on Foata normal form. 24/2332 useless extension candidates. Maximal degree in co-relation 11838. Up to 1972 conditions per place. [2024-06-21 22:00:08,937 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 99 selfloop transitions, 26 changer transitions 0/130 dead transitions. [2024-06-21 22:00:08,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 130 transitions, 1129 flow [2024-06-21 22:00:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:00:08,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:00:08,946 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 695 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:00:08,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 130 transitions, 1129 flow [2024-06-21 22:00:08,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 130 transitions, 1071 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:08,966 INFO L231 Difference]: Finished difference. Result has 86 places, 93 transitions, 742 flow [2024-06-21 22:00:08,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=742, PETRI_PLACES=86, PETRI_TRANSITIONS=93} [2024-06-21 22:00:08,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-21 22:00:08,967 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 742 flow [2024-06-21 22:00:08,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:08,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:08,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:08,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 22:00:08,967 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:08,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash 235022351, now seen corresponding path program 3 times [2024-06-21 22:00:08,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:08,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099637474] [2024-06-21 22:00:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:08,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:10,985 INFO 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 22:00:10,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:10,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099637474] [2024-06-21 22:00:10,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099637474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:10,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:10,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:10,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307565600] [2024-06-21 22:00:10,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:10,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:10,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:10,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:10,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:11,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:11,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 93 transitions, 742 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:11,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:11,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:11,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:11,875 INFO L124 PetriNetUnfolderBase]: 1491/2352 cut-off events. [2024-06-21 22:00:11,875 INFO L125 PetriNetUnfolderBase]: For 29922/29922 co-relation queries the response was YES. [2024-06-21 22:00:11,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12340 conditions, 2352 events. 1491/2352 cut-off events. For 29922/29922 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11921 event pairs, 423 based on Foata normal form. 4/2350 useless extension candidates. Maximal degree in co-relation 12305. Up to 1938 conditions per place. [2024-06-21 22:00:11,886 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 40 changer transitions 0/137 dead transitions. [2024-06-21 22:00:11,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 1210 flow [2024-06-21 22:00:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:11,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:00:11,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 22:00:11,899 INFO L175 Difference]: Start difference. First operand has 86 places, 93 transitions, 742 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:00:11,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 1210 flow [2024-06-21 22:00:11,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 137 transitions, 1149 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:11,925 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 821 flow [2024-06-21 22:00:11,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=821, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-21 22:00:11,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 22:00:11,926 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 821 flow [2024-06-21 22:00:11,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:11,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:11,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:11,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 22:00:11,927 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:11,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash 235319021, now seen corresponding path program 4 times [2024-06-21 22:00:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:11,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810361833] [2024-06-21 22:00:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:11,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:13,710 INFO 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 22:00:13,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:13,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810361833] [2024-06-21 22:00:13,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810361833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:13,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:13,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:13,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534925868] [2024-06-21 22:00:13,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:13,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:13,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:13,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:13,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 821 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:13,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:13,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:13,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:14,508 INFO L124 PetriNetUnfolderBase]: 1483/2346 cut-off events. [2024-06-21 22:00:14,509 INFO L125 PetriNetUnfolderBase]: For 31946/31946 co-relation queries the response was YES. [2024-06-21 22:00:14,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12504 conditions, 2346 events. 1483/2346 cut-off events. For 31946/31946 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11915 event pairs, 385 based on Foata normal form. 4/2344 useless extension candidates. Maximal degree in co-relation 12468. Up to 1708 conditions per place. [2024-06-21 22:00:14,522 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 86 selfloop transitions, 44 changer transitions 0/135 dead transitions. [2024-06-21 22:00:14,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 135 transitions, 1279 flow [2024-06-21 22:00:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:00:14,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:00:14,532 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 821 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:00:14,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 135 transitions, 1279 flow [2024-06-21 22:00:14,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 135 transitions, 1179 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 22:00:14,591 INFO L231 Difference]: Finished difference. Result has 90 places, 97 transitions, 870 flow [2024-06-21 22:00:14,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=870, PETRI_PLACES=90, PETRI_TRANSITIONS=97} [2024-06-21 22:00:14,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 22:00:14,592 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 97 transitions, 870 flow [2024-06-21 22:00:14,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:14,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:14,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:14,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 22:00:14,592 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:14,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:14,593 INFO L85 PathProgramCache]: Analyzing trace with hash 566421038, now seen corresponding path program 1 times [2024-06-21 22:00:14,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:14,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342865223] [2024-06-21 22:00:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:14,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:15,988 INFO 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 22:00:15,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:15,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342865223] [2024-06-21 22:00:15,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342865223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:15,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:15,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:00:15,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657870292] [2024-06-21 22:00:15,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:15,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:00:15,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:15,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:00:15,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:00:16,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:16,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 97 transitions, 870 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:16,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:16,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:16,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:16,771 INFO L124 PetriNetUnfolderBase]: 1480/2344 cut-off events. [2024-06-21 22:00:16,772 INFO L125 PetriNetUnfolderBase]: For 30600/30602 co-relation queries the response was YES. [2024-06-21 22:00:16,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12510 conditions, 2344 events. 1480/2344 cut-off events. For 30600/30602 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11895 event pairs, 423 based on Foata normal form. 1/2343 useless extension candidates. Maximal degree in co-relation 12473. Up to 2262 conditions per place. [2024-06-21 22:00:16,786 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 97 selfloop transitions, 8 changer transitions 0/110 dead transitions. [2024-06-21 22:00:16,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 110 transitions, 1128 flow [2024-06-21 22:00:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:00:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:00:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-21 22:00:16,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 22:00:16,815 INFO L175 Difference]: Start difference. First operand has 90 places, 97 transitions, 870 flow. Second operand 5 states and 84 transitions. [2024-06-21 22:00:16,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 110 transitions, 1128 flow [2024-06-21 22:00:16,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 110 transitions, 1003 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:16,864 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 793 flow [2024-06-21 22:00:16,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=793, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-21 22:00:16,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 22:00:16,865 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 793 flow [2024-06-21 22:00:16,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:16,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:16,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:16,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 22:00:16,880 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:16,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash 3459771, now seen corresponding path program 1 times [2024-06-21 22:00:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:16,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343224781] [2024-06-21 22:00:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:19,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:19,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343224781] [2024-06-21 22:00:19,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343224781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:19,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:19,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:19,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164508520] [2024-06-21 22:00:19,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:19,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:19,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:19,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:19,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:19,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:19,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 793 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:19,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:19,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:19,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:20,071 INFO L124 PetriNetUnfolderBase]: 1493/2372 cut-off events. [2024-06-21 22:00:20,072 INFO L125 PetriNetUnfolderBase]: For 31668/31668 co-relation queries the response was YES. [2024-06-21 22:00:20,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12624 conditions, 2372 events. 1493/2372 cut-off events. For 31668/31668 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12086 event pairs, 395 based on Foata normal form. 2/2372 useless extension candidates. Maximal degree in co-relation 12586. Up to 2172 conditions per place. [2024-06-21 22:00:20,086 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 106 selfloop transitions, 29 changer transitions 0/140 dead transitions. [2024-06-21 22:00:20,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 1229 flow [2024-06-21 22:00:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:00:20,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:00:20,089 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 793 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:00:20,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 1229 flow [2024-06-21 22:00:20,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 140 transitions, 1203 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 22:00:20,115 INFO L231 Difference]: Finished difference. Result has 94 places, 103 transitions, 896 flow [2024-06-21 22:00:20,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=896, PETRI_PLACES=94, PETRI_TRANSITIONS=103} [2024-06-21 22:00:20,115 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-21 22:00:20,116 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 103 transitions, 896 flow [2024-06-21 22:00:20,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:20,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:20,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:20,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 22:00:20,116 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:20,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:20,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1708758819, now seen corresponding path program 2 times [2024-06-21 22:00:20,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:20,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519386575] [2024-06-21 22:00:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:20,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:22,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:22,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519386575] [2024-06-21 22:00:22,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519386575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:22,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:22,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:22,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188229363] [2024-06-21 22:00:22,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:22,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:22,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:22,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:22,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 103 transitions, 896 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:22,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:22,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:22,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:23,295 INFO L124 PetriNetUnfolderBase]: 1506/2394 cut-off events. [2024-06-21 22:00:23,295 INFO L125 PetriNetUnfolderBase]: For 35934/35936 co-relation queries the response was YES. [2024-06-21 22:00:23,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13320 conditions, 2394 events. 1506/2394 cut-off events. For 35934/35936 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12223 event pairs, 401 based on Foata normal form. 2/2394 useless extension candidates. Maximal degree in co-relation 13281. Up to 2130 conditions per place. [2024-06-21 22:00:23,310 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 93 selfloop transitions, 40 changer transitions 0/138 dead transitions. [2024-06-21 22:00:23,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1314 flow [2024-06-21 22:00:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 22:00:23,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:00:23,312 INFO L175 Difference]: Start difference. First operand has 94 places, 103 transitions, 896 flow. Second operand 8 states and 144 transitions. [2024-06-21 22:00:23,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1314 flow [2024-06-21 22:00:23,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1211 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:23,340 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 949 flow [2024-06-21 22:00:23,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=949, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2024-06-21 22:00:23,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-21 22:00:23,341 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 949 flow [2024-06-21 22:00:23,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:23,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:23,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:23,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 22:00:23,342 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:23,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:23,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1764557123, now seen corresponding path program 3 times [2024-06-21 22:00:23,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:23,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092929581] [2024-06-21 22:00:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:23,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:25,524 INFO 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 22:00:25,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092929581] [2024-06-21 22:00:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092929581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:25,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:25,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:25,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019669237] [2024-06-21 22:00:25,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:25,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:25,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:25,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:25,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:25,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:25,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 949 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:25,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:25,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:25,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:26,433 INFO L124 PetriNetUnfolderBase]: 1519/2409 cut-off events. [2024-06-21 22:00:26,434 INFO L125 PetriNetUnfolderBase]: For 40762/40762 co-relation queries the response was YES. [2024-06-21 22:00:26,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13883 conditions, 2409 events. 1519/2409 cut-off events. For 40762/40762 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12346 event pairs, 415 based on Foata normal form. 2/2400 useless extension candidates. Maximal degree in co-relation 13843. Up to 2133 conditions per place. [2024-06-21 22:00:26,448 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 40 changer transitions 0/139 dead transitions. [2024-06-21 22:00:26,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 139 transitions, 1383 flow [2024-06-21 22:00:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:26,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 22:00:26,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 22:00:26,450 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 949 flow. Second operand 8 states and 143 transitions. [2024-06-21 22:00:26,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 139 transitions, 1383 flow [2024-06-21 22:00:26,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 139 transitions, 1251 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:26,477 INFO L231 Difference]: Finished difference. Result has 98 places, 109 transitions, 979 flow [2024-06-21 22:00:26,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=979, PETRI_PLACES=98, PETRI_TRANSITIONS=109} [2024-06-21 22:00:26,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 22:00:26,478 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 109 transitions, 979 flow [2024-06-21 22:00:26,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:26,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:26,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:26,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 22:00:26,478 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:26,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1304247743, now seen corresponding path program 4 times [2024-06-21 22:00:26,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:26,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109582463] [2024-06-21 22:00:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:26,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:28,677 INFO 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 22:00:28,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:28,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109582463] [2024-06-21 22:00:28,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109582463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:28,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:28,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:28,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480477458] [2024-06-21 22:00:28,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:28,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:28,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:28,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:28,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 109 transitions, 979 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:28,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:28,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:28,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:29,594 INFO L124 PetriNetUnfolderBase]: 1514/2402 cut-off events. [2024-06-21 22:00:29,595 INFO L125 PetriNetUnfolderBase]: For 44963/44963 co-relation queries the response was YES. [2024-06-21 22:00:29,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14134 conditions, 2402 events. 1514/2402 cut-off events. For 44963/44963 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12313 event pairs, 415 based on Foata normal form. 2/2393 useless extension candidates. Maximal degree in co-relation 14093. Up to 2043 conditions per place. [2024-06-21 22:00:29,610 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 79 selfloop transitions, 58 changer transitions 0/142 dead transitions. [2024-06-21 22:00:29,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 1425 flow [2024-06-21 22:00:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 22:00:29,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 22:00:29,612 INFO L175 Difference]: Start difference. First operand has 98 places, 109 transitions, 979 flow. Second operand 8 states and 143 transitions. [2024-06-21 22:00:29,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 1425 flow [2024-06-21 22:00:29,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1287 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:29,643 INFO L231 Difference]: Finished difference. Result has 100 places, 112 transitions, 1045 flow [2024-06-21 22:00:29,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1045, PETRI_PLACES=100, PETRI_TRANSITIONS=112} [2024-06-21 22:00:29,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 22:00:29,644 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 112 transitions, 1045 flow [2024-06-21 22:00:29,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:29,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:29,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:29,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 22:00:29,645 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:29,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:29,645 INFO L85 PathProgramCache]: Analyzing trace with hash 379185501, now seen corresponding path program 1 times [2024-06-21 22:00:29,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:29,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666490500] [2024-06-21 22:00:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:29,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:31,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:31,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666490500] [2024-06-21 22:00:31,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666490500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:31,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:31,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:00:31,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254463672] [2024-06-21 22:00:31,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:31,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:00:31,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:31,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:00:31,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:00:31,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:31,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 112 transitions, 1045 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:31,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:31,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:31,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:32,124 INFO L124 PetriNetUnfolderBase]: 1536/2442 cut-off events. [2024-06-21 22:00:32,124 INFO L125 PetriNetUnfolderBase]: For 49856/49856 co-relation queries the response was YES. [2024-06-21 22:00:32,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14683 conditions, 2442 events. 1536/2442 cut-off events. For 49856/49856 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12512 event pairs, 407 based on Foata normal form. 6/2437 useless extension candidates. Maximal degree in co-relation 14641. Up to 2206 conditions per place. [2024-06-21 22:00:32,140 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 104 selfloop transitions, 27 changer transitions 0/136 dead transitions. [2024-06-21 22:00:32,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1501 flow [2024-06-21 22:00:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:00:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:00:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 22:00:32,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 22:00:32,142 INFO L175 Difference]: Start difference. First operand has 100 places, 112 transitions, 1045 flow. Second operand 6 states and 106 transitions. [2024-06-21 22:00:32,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1501 flow [2024-06-21 22:00:32,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1310 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:32,180 INFO L231 Difference]: Finished difference. Result has 101 places, 120 transitions, 1023 flow [2024-06-21 22:00:32,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1023, PETRI_PLACES=101, PETRI_TRANSITIONS=120} [2024-06-21 22:00:32,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-21 22:00:32,181 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 120 transitions, 1023 flow [2024-06-21 22:00:32,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:32,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:32,182 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 22:00:32,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 22:00:32,182 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:32,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:32,182 INFO L85 PathProgramCache]: Analyzing trace with hash 414393540, now seen corresponding path program 1 times [2024-06-21 22:00:32,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:32,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005411852] [2024-06-21 22:00:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:32,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:34,171 INFO 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 22:00:34,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:34,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005411852] [2024-06-21 22:00:34,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005411852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:34,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:34,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:34,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518652415] [2024-06-21 22:00:34,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:34,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:34,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:34,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:34,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:34,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:34,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 120 transitions, 1023 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:34,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:34,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:34,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:35,258 INFO L124 PetriNetUnfolderBase]: 1605/2560 cut-off events. [2024-06-21 22:00:35,258 INFO L125 PetriNetUnfolderBase]: For 54015/54015 co-relation queries the response was YES. [2024-06-21 22:00:35,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15476 conditions, 2560 events. 1605/2560 cut-off events. For 54015/54015 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13363 event pairs, 354 based on Foata normal form. 4/2557 useless extension candidates. Maximal degree in co-relation 15432. Up to 2310 conditions per place. [2024-06-21 22:00:35,277 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 132 selfloop transitions, 35 changer transitions 0/172 dead transitions. [2024-06-21 22:00:35,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 172 transitions, 1634 flow [2024-06-21 22:00:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:00:35,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 22:00:35,279 INFO L175 Difference]: Start difference. First operand has 101 places, 120 transitions, 1023 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:00:35,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 172 transitions, 1634 flow [2024-06-21 22:00:35,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 172 transitions, 1569 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 22:00:35,336 INFO L231 Difference]: Finished difference. Result has 112 places, 137 transitions, 1259 flow [2024-06-21 22:00:35,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1259, PETRI_PLACES=112, PETRI_TRANSITIONS=137} [2024-06-21 22:00:35,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 22:00:35,337 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 137 transitions, 1259 flow [2024-06-21 22:00:35,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:35,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:35,337 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 22:00:35,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 22:00:35,337 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:35,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:35,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1285363248, now seen corresponding path program 2 times [2024-06-21 22:00:35,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:35,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116499013] [2024-06-21 22:00:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:35,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:37,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:37,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116499013] [2024-06-21 22:00:37,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116499013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:37,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483860694] [2024-06-21 22:00:37,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:37,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:37,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:37,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:37,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 1259 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:37,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:37,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:37,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:38,314 INFO L124 PetriNetUnfolderBase]: 1625/2598 cut-off events. [2024-06-21 22:00:38,315 INFO L125 PetriNetUnfolderBase]: For 57531/57531 co-relation queries the response was YES. [2024-06-21 22:00:38,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16142 conditions, 2598 events. 1625/2598 cut-off events. For 57531/57531 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13626 event pairs, 367 based on Foata normal form. 4/2600 useless extension candidates. Maximal degree in co-relation 16092. Up to 2344 conditions per place. [2024-06-21 22:00:38,332 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 40 changer transitions 0/176 dead transitions. [2024-06-21 22:00:38,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 176 transitions, 1767 flow [2024-06-21 22:00:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:00:38,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:00:38,333 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 1259 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:00:38,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 176 transitions, 1767 flow [2024-06-21 22:00:38,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 176 transitions, 1694 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-21 22:00:38,388 INFO L231 Difference]: Finished difference. Result has 118 places, 139 transitions, 1332 flow [2024-06-21 22:00:38,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1332, PETRI_PLACES=118, PETRI_TRANSITIONS=139} [2024-06-21 22:00:38,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 22:00:38,389 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 139 transitions, 1332 flow [2024-06-21 22:00:38,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:38,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:38,389 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 22:00:38,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 22:00:38,389 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:38,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:38,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1144558316, now seen corresponding path program 1 times [2024-06-21 22:00:38,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:38,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060381719] [2024-06-21 22:00:38,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:38,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:40,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:40,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060381719] [2024-06-21 22:00:40,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060381719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:40,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:40,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:40,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568174568] [2024-06-21 22:00:40,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:40,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:40,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:40,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:40,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:41,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:41,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 139 transitions, 1332 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:41,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:41,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:41,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:42,317 INFO L124 PetriNetUnfolderBase]: 1693/2714 cut-off events. [2024-06-21 22:00:42,318 INFO L125 PetriNetUnfolderBase]: For 69659/69659 co-relation queries the response was YES. [2024-06-21 22:00:42,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17215 conditions, 2714 events. 1693/2714 cut-off events. For 69659/69659 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14372 event pairs, 375 based on Foata normal form. 16/2728 useless extension candidates. Maximal degree in co-relation 17163. Up to 2319 conditions per place. [2024-06-21 22:00:42,336 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 137 selfloop transitions, 43 changer transitions 0/185 dead transitions. [2024-06-21 22:00:42,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 185 transitions, 1906 flow [2024-06-21 22:00:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:00:42,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 22:00:42,338 INFO L175 Difference]: Start difference. First operand has 118 places, 139 transitions, 1332 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:00:42,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 185 transitions, 1906 flow [2024-06-21 22:00:42,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 185 transitions, 1780 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:42,394 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1348 flow [2024-06-21 22:00:42,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1348, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2024-06-21 22:00:42,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 22:00:42,395 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1348 flow [2024-06-21 22:00:42,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:42,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:42,396 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 22:00:42,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 22:00:42,396 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:42,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:42,397 INFO L85 PathProgramCache]: Analyzing trace with hash 222718924, now seen corresponding path program 2 times [2024-06-21 22:00:42,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:42,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835824217] [2024-06-21 22:00:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:42,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:44,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:44,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835824217] [2024-06-21 22:00:44,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835824217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:44,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:44,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:44,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087777889] [2024-06-21 22:00:44,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:44,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:44,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:44,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:44,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:44,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:44,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1348 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:44,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:44,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:44,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:45,746 INFO L124 PetriNetUnfolderBase]: 1761/2837 cut-off events. [2024-06-21 22:00:45,747 INFO L125 PetriNetUnfolderBase]: For 76588/76590 co-relation queries the response was YES. [2024-06-21 22:00:45,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18141 conditions, 2837 events. 1761/2837 cut-off events. For 76588/76590 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15257 event pairs, 405 based on Foata normal form. 16/2851 useless extension candidates. Maximal degree in co-relation 18088. Up to 2410 conditions per place. [2024-06-21 22:00:45,766 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 125 selfloop transitions, 51 changer transitions 0/181 dead transitions. [2024-06-21 22:00:45,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 181 transitions, 1892 flow [2024-06-21 22:00:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:00:45,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:00:45,768 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1348 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:00:45,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 181 transitions, 1892 flow [2024-06-21 22:00:45,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1796 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 22:00:45,832 INFO L231 Difference]: Finished difference. Result has 123 places, 141 transitions, 1409 flow [2024-06-21 22:00:45,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1409, PETRI_PLACES=123, PETRI_TRANSITIONS=141} [2024-06-21 22:00:45,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 22:00:45,833 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 141 transitions, 1409 flow [2024-06-21 22:00:45,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:45,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:45,834 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 22:00:45,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 22:00:45,834 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:45,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:45,834 INFO L85 PathProgramCache]: Analyzing trace with hash 394851318, now seen corresponding path program 3 times [2024-06-21 22:00:45,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:45,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226179021] [2024-06-21 22:00:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:45,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:47,971 INFO 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 22:00:47,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:47,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226179021] [2024-06-21 22:00:47,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226179021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:47,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:47,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:47,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457050558] [2024-06-21 22:00:47,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:47,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:47,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:47,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:48,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:48,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 141 transitions, 1409 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:48,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:48,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:48,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:49,162 INFO L124 PetriNetUnfolderBase]: 1905/3101 cut-off events. [2024-06-21 22:00:49,163 INFO L125 PetriNetUnfolderBase]: For 83366/83368 co-relation queries the response was YES. [2024-06-21 22:00:49,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19722 conditions, 3101 events. 1905/3101 cut-off events. For 83366/83368 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17179 event pairs, 437 based on Foata normal form. 12/3111 useless extension candidates. Maximal degree in co-relation 19668. Up to 2332 conditions per place. [2024-06-21 22:00:49,186 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 54 changer transitions 0/187 dead transitions. [2024-06-21 22:00:49,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 187 transitions, 2047 flow [2024-06-21 22:00:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:49,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:00:49,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 22:00:49,188 INFO L175 Difference]: Start difference. First operand has 123 places, 141 transitions, 1409 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:00:49,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 187 transitions, 2047 flow [2024-06-21 22:00:49,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 187 transitions, 1928 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 22:00:49,257 INFO L231 Difference]: Finished difference. Result has 126 places, 144 transitions, 1521 flow [2024-06-21 22:00:49,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1521, PETRI_PLACES=126, PETRI_TRANSITIONS=144} [2024-06-21 22:00:49,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 22:00:49,270 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 144 transitions, 1521 flow [2024-06-21 22:00:49,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:49,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:49,270 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 22:00:49,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 22:00:49,270 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:49,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash 557469015, now seen corresponding path program 1 times [2024-06-21 22:00:49,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:49,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253877509] [2024-06-21 22:00:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:49,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:50,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:50,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253877509] [2024-06-21 22:00:50,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253877509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:50,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:50,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:00:50,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260968294] [2024-06-21 22:00:50,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:50,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:00:50,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:00:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:00:50,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:50,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 144 transitions, 1521 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:50,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:50,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:50,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:51,893 INFO L124 PetriNetUnfolderBase]: 1915/3125 cut-off events. [2024-06-21 22:00:51,893 INFO L125 PetriNetUnfolderBase]: For 83541/83543 co-relation queries the response was YES. [2024-06-21 22:00:51,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20016 conditions, 3125 events. 1915/3125 cut-off events. For 83541/83543 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17474 event pairs, 460 based on Foata normal form. 2/3125 useless extension candidates. Maximal degree in co-relation 19960. Up to 2818 conditions per place. [2024-06-21 22:00:51,918 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 125 selfloop transitions, 40 changer transitions 0/170 dead transitions. [2024-06-21 22:00:51,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 170 transitions, 2049 flow [2024-06-21 22:00:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:00:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:00:51,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 22:00:51,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 22:00:51,919 INFO L175 Difference]: Start difference. First operand has 126 places, 144 transitions, 1521 flow. Second operand 6 states and 115 transitions. [2024-06-21 22:00:51,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 170 transitions, 2049 flow [2024-06-21 22:00:52,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 170 transitions, 1922 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:52,015 INFO L231 Difference]: Finished difference. Result has 126 places, 147 transitions, 1531 flow [2024-06-21 22:00:52,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1531, PETRI_PLACES=126, PETRI_TRANSITIONS=147} [2024-06-21 22:00:52,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 22:00:52,018 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 147 transitions, 1531 flow [2024-06-21 22:00:52,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:52,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:52,018 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 22:00:52,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 22:00:52,018 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:52,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash -308785394, now seen corresponding path program 4 times [2024-06-21 22:00:52,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:52,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692852829] [2024-06-21 22:00:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:52,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:54,500 INFO 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 22:00:54,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:54,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692852829] [2024-06-21 22:00:54,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692852829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:54,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:54,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:54,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593236313] [2024-06-21 22:00:54,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:54,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:54,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:54,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:54,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 147 transitions, 1531 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:54,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:54,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:54,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:55,853 INFO L124 PetriNetUnfolderBase]: 2107/3451 cut-off events. [2024-06-21 22:00:55,853 INFO L125 PetriNetUnfolderBase]: For 101250/101250 co-relation queries the response was YES. [2024-06-21 22:00:55,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22584 conditions, 3451 events. 2107/3451 cut-off events. For 101250/101250 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19836 event pairs, 520 based on Foata normal form. 12/3453 useless extension candidates. Maximal degree in co-relation 22527. Up to 2734 conditions per place. [2024-06-21 22:00:55,876 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 136 selfloop transitions, 52 changer transitions 0/193 dead transitions. [2024-06-21 22:00:55,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 193 transitions, 2323 flow [2024-06-21 22:00:55,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:00:55,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:00:55,878 INFO L175 Difference]: Start difference. First operand has 126 places, 147 transitions, 1531 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:00:55,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 193 transitions, 2323 flow [2024-06-21 22:00:55,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 193 transitions, 2258 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 22:00:55,981 INFO L231 Difference]: Finished difference. Result has 133 places, 150 transitions, 1711 flow [2024-06-21 22:00:55,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1711, PETRI_PLACES=133, PETRI_TRANSITIONS=150} [2024-06-21 22:00:55,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 22:00:55,982 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 150 transitions, 1711 flow [2024-06-21 22:00:55,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:55,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:55,983 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 22:00:55,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 22:00:55,983 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:55,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:55,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1138553714, now seen corresponding path program 5 times [2024-06-21 22:00:55,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:55,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982726490] [2024-06-21 22:00:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:55,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:58,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:58,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982726490] [2024-06-21 22:00:58,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982726490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:58,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:58,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:58,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720011309] [2024-06-21 22:00:58,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:58,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:58,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:58,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:58,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:58,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:00:58,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 150 transitions, 1711 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:58,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:58,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:00:58,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:59,667 INFO L124 PetriNetUnfolderBase]: 2079/3407 cut-off events. [2024-06-21 22:00:59,667 INFO L125 PetriNetUnfolderBase]: For 103961/103961 co-relation queries the response was YES. [2024-06-21 22:00:59,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22137 conditions, 3407 events. 2079/3407 cut-off events. For 103961/103961 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19650 event pairs, 522 based on Foata normal form. 16/3413 useless extension candidates. Maximal degree in co-relation 22078. Up to 2944 conditions per place. [2024-06-21 22:00:59,689 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 133 selfloop transitions, 50 changer transitions 0/188 dead transitions. [2024-06-21 22:00:59,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 188 transitions, 2231 flow [2024-06-21 22:00:59,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:00:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:00:59,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 22:00:59,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 22:00:59,691 INFO L175 Difference]: Start difference. First operand has 133 places, 150 transitions, 1711 flow. Second operand 9 states and 161 transitions. [2024-06-21 22:00:59,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 188 transitions, 2231 flow [2024-06-21 22:00:59,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 188 transitions, 2117 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 22:00:59,807 INFO L231 Difference]: Finished difference. Result has 137 places, 150 transitions, 1704 flow [2024-06-21 22:00:59,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1704, PETRI_PLACES=137, PETRI_TRANSITIONS=150} [2024-06-21 22:00:59,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 22:00:59,808 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 150 transitions, 1704 flow [2024-06-21 22:00:59,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:59,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:59,808 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 22:00:59,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 22:00:59,808 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:59,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:59,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1771483794, now seen corresponding path program 6 times [2024-06-21 22:00:59,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:59,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304696754] [2024-06-21 22:00:59,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:59,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:01,739 INFO 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 22:01:01,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:01,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304696754] [2024-06-21 22:01:01,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304696754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:01,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:01,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:01,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425972615] [2024-06-21 22:01:01,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:01,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:01,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:01,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:01,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:01,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 150 transitions, 1704 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:01,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:01,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:01,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:02,921 INFO L124 PetriNetUnfolderBase]: 2223/3663 cut-off events. [2024-06-21 22:01:02,921 INFO L125 PetriNetUnfolderBase]: For 116309/116309 co-relation queries the response was YES. [2024-06-21 22:01:02,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24433 conditions, 3663 events. 2223/3663 cut-off events. For 116309/116309 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21655 event pairs, 550 based on Foata normal form. 12/3665 useless extension candidates. Maximal degree in co-relation 24372. Up to 2963 conditions per place. [2024-06-21 22:01:02,948 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 120 selfloop transitions, 70 changer transitions 0/195 dead transitions. [2024-06-21 22:01:02,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 195 transitions, 2488 flow [2024-06-21 22:01:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:01:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:01:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 22:01:02,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 22:01:02,950 INFO L175 Difference]: Start difference. First operand has 137 places, 150 transitions, 1704 flow. Second operand 9 states and 166 transitions. [2024-06-21 22:01:02,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 195 transitions, 2488 flow [2024-06-21 22:01:03,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 195 transitions, 2389 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 22:01:03,085 INFO L231 Difference]: Finished difference. Result has 139 places, 152 transitions, 1857 flow [2024-06-21 22:01:03,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1857, PETRI_PLACES=139, PETRI_TRANSITIONS=152} [2024-06-21 22:01:03,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 22:01:03,086 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 152 transitions, 1857 flow [2024-06-21 22:01:03,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:03,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:03,086 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 22:01:03,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 22:01:03,086 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:03,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1776972496, now seen corresponding path program 7 times [2024-06-21 22:01:03,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:03,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413066076] [2024-06-21 22:01:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:03,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:05,821 INFO 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 22:01:05,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:05,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413066076] [2024-06-21 22:01:05,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413066076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:05,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:05,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:05,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152637755] [2024-06-21 22:01:05,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:05,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:05,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:05,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:05,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:05,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:05,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 152 transitions, 1857 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:05,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:05,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:05,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:07,497 INFO L124 PetriNetUnfolderBase]: 2195/3628 cut-off events. [2024-06-21 22:01:07,498 INFO L125 PetriNetUnfolderBase]: For 117850/117850 co-relation queries the response was YES. [2024-06-21 22:01:07,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23905 conditions, 3628 events. 2195/3628 cut-off events. For 117850/117850 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21454 event pairs, 529 based on Foata normal form. 16/3639 useless extension candidates. Maximal degree in co-relation 23843. Up to 3031 conditions per place. [2024-06-21 22:01:07,572 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 146 selfloop transitions, 55 changer transitions 0/206 dead transitions. [2024-06-21 22:01:07,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 206 transitions, 2514 flow [2024-06-21 22:01:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:01:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:01:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-21 22:01:07,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-21 22:01:07,573 INFO L175 Difference]: Start difference. First operand has 139 places, 152 transitions, 1857 flow. Second operand 11 states and 194 transitions. [2024-06-21 22:01:07,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 206 transitions, 2514 flow [2024-06-21 22:01:07,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 206 transitions, 2360 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:07,677 INFO L231 Difference]: Finished difference. Result has 145 places, 157 transitions, 1909 flow [2024-06-21 22:01:07,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1909, PETRI_PLACES=145, PETRI_TRANSITIONS=157} [2024-06-21 22:01:07,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 22:01:07,678 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 157 transitions, 1909 flow [2024-06-21 22:01:07,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:07,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:07,678 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 22:01:07,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 22:01:07,678 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:07,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:07,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2086062246, now seen corresponding path program 8 times [2024-06-21 22:01:07,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:07,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582641360] [2024-06-21 22:01:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:07,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:10,267 INFO 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 22:01:10,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:10,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582641360] [2024-06-21 22:01:10,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582641360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:10,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:10,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:10,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820773180] [2024-06-21 22:01:10,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:10,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:10,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:10,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:10,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:10,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 157 transitions, 1909 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:10,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:10,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:10,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:11,589 INFO L124 PetriNetUnfolderBase]: 2215/3668 cut-off events. [2024-06-21 22:01:11,590 INFO L125 PetriNetUnfolderBase]: For 115749/115749 co-relation queries the response was YES. [2024-06-21 22:01:11,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24127 conditions, 3668 events. 2215/3668 cut-off events. For 115749/115749 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21645 event pairs, 491 based on Foata normal form. 12/3675 useless extension candidates. Maximal degree in co-relation 24063. Up to 2093 conditions per place. [2024-06-21 22:01:11,619 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 134 selfloop transitions, 63 changer transitions 0/202 dead transitions. [2024-06-21 22:01:11,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 202 transitions, 2557 flow [2024-06-21 22:01:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:01:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:01:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:01:11,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 22:01:11,621 INFO L175 Difference]: Start difference. First operand has 145 places, 157 transitions, 1909 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:01:11,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 202 transitions, 2557 flow [2024-06-21 22:01:11,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 202 transitions, 2429 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 22:01:11,786 INFO L231 Difference]: Finished difference. Result has 145 places, 158 transitions, 1969 flow [2024-06-21 22:01:11,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1969, PETRI_PLACES=145, PETRI_TRANSITIONS=158} [2024-06-21 22:01:11,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 22:01:11,787 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 158 transitions, 1969 flow [2024-06-21 22:01:11,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:11,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:11,787 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 22:01:11,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 22:01:11,787 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:11,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash -769989517, now seen corresponding path program 2 times [2024-06-21 22:01:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:11,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211792109] [2024-06-21 22:01:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:11,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:13,405 INFO 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 22:01:13,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:13,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211792109] [2024-06-21 22:01:13,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211792109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:13,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:13,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:01:13,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451416679] [2024-06-21 22:01:13,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:13,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:01:13,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:13,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:01:13,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:01:13,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:13,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 158 transitions, 1969 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:13,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:13,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:13,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:14,485 INFO L124 PetriNetUnfolderBase]: 2189/3627 cut-off events. [2024-06-21 22:01:14,486 INFO L125 PetriNetUnfolderBase]: For 113148/113148 co-relation queries the response was YES. [2024-06-21 22:01:14,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23821 conditions, 3627 events. 2189/3627 cut-off events. For 113148/113148 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21514 event pairs, 551 based on Foata normal form. 6/3623 useless extension candidates. Maximal degree in co-relation 23757. Up to 3323 conditions per place. [2024-06-21 22:01:14,565 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 129 selfloop transitions, 38 changer transitions 0/172 dead transitions. [2024-06-21 22:01:14,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 172 transitions, 2369 flow [2024-06-21 22:01:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:01:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:01:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 22:01:14,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:01:14,567 INFO L175 Difference]: Start difference. First operand has 145 places, 158 transitions, 1969 flow. Second operand 6 states and 105 transitions. [2024-06-21 22:01:14,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 172 transitions, 2369 flow [2024-06-21 22:01:14,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 2183 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 22:01:14,726 INFO L231 Difference]: Finished difference. Result has 144 places, 158 transitions, 1867 flow [2024-06-21 22:01:14,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1867, PETRI_PLACES=144, PETRI_TRANSITIONS=158} [2024-06-21 22:01:14,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 22:01:14,726 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 158 transitions, 1867 flow [2024-06-21 22:01:14,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:14,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:14,727 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 22:01:14,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 22:01:14,727 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:14,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:14,728 INFO L85 PathProgramCache]: Analyzing trace with hash 499695058, now seen corresponding path program 3 times [2024-06-21 22:01:14,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:14,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311843323] [2024-06-21 22:01:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:14,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:16,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:16,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311843323] [2024-06-21 22:01:16,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311843323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:16,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:16,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:16,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134583208] [2024-06-21 22:01:16,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:16,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:16,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:16,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:16,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:16,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:16,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 158 transitions, 1867 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:16,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:16,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:16,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:17,507 INFO L124 PetriNetUnfolderBase]: 2268/3764 cut-off events. [2024-06-21 22:01:17,507 INFO L125 PetriNetUnfolderBase]: For 112321/112321 co-relation queries the response was YES. [2024-06-21 22:01:17,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24044 conditions, 3764 events. 2268/3764 cut-off events. For 112321/112321 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22519 event pairs, 531 based on Foata normal form. 4/3766 useless extension candidates. Maximal degree in co-relation 23979. Up to 3424 conditions per place. [2024-06-21 22:01:17,531 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 165 selfloop transitions, 46 changer transitions 0/216 dead transitions. [2024-06-21 22:01:17,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 216 transitions, 2581 flow [2024-06-21 22:01:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:01:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:01:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:01:17,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:01:17,532 INFO L175 Difference]: Start difference. First operand has 144 places, 158 transitions, 1867 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:01:17,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 216 transitions, 2581 flow [2024-06-21 22:01:17,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 216 transitions, 2452 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:17,651 INFO L231 Difference]: Finished difference. Result has 149 places, 172 transitions, 2058 flow [2024-06-21 22:01:17,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2058, PETRI_PLACES=149, PETRI_TRANSITIONS=172} [2024-06-21 22:01:17,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 22:01:17,651 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 172 transitions, 2058 flow [2024-06-21 22:01:17,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:17,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:17,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:17,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 22:01:17,652 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:17,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1965761036, now seen corresponding path program 4 times [2024-06-21 22:01:17,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:17,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446522435] [2024-06-21 22:01:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:17,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:19,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:19,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446522435] [2024-06-21 22:01:19,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446522435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:19,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:19,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:19,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130843185] [2024-06-21 22:01:19,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:19,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:19,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:19,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:19,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 172 transitions, 2058 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:19,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:19,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:19,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:20,734 INFO L124 PetriNetUnfolderBase]: 2366/3934 cut-off events. [2024-06-21 22:01:20,735 INFO L125 PetriNetUnfolderBase]: For 121559/121559 co-relation queries the response was YES. [2024-06-21 22:01:20,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25522 conditions, 3934 events. 2366/3934 cut-off events. For 121559/121559 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 23877 event pairs, 595 based on Foata normal form. 4/3936 useless extension candidates. Maximal degree in co-relation 25454. Up to 3583 conditions per place. [2024-06-21 22:01:20,763 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 39 changer transitions 0/226 dead transitions. [2024-06-21 22:01:20,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 226 transitions, 2841 flow [2024-06-21 22:01:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:01:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:01:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:01:20,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 22:01:20,765 INFO L175 Difference]: Start difference. First operand has 149 places, 172 transitions, 2058 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:01:20,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 226 transitions, 2841 flow [2024-06-21 22:01:20,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 226 transitions, 2637 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-21 22:01:20,962 INFO L231 Difference]: Finished difference. Result has 154 places, 184 transitions, 2197 flow [2024-06-21 22:01:20,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2197, PETRI_PLACES=154, PETRI_TRANSITIONS=184} [2024-06-21 22:01:20,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 22:01:20,963 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 184 transitions, 2197 flow [2024-06-21 22:01:20,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:20,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:20,963 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 22:01:20,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 22:01:20,963 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:20,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:20,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1702829742, now seen corresponding path program 5 times [2024-06-21 22:01:20,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:20,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036768320] [2024-06-21 22:01:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:20,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:22,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:22,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036768320] [2024-06-21 22:01:22,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036768320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:22,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:22,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:22,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298902758] [2024-06-21 22:01:22,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:22,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:22,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:22,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:22,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:22,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:22,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 184 transitions, 2197 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:22,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:22,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:22,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:23,670 INFO L124 PetriNetUnfolderBase]: 2442/4058 cut-off events. [2024-06-21 22:01:23,670 INFO L125 PetriNetUnfolderBase]: For 123513/123513 co-relation queries the response was YES. [2024-06-21 22:01:23,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26103 conditions, 4058 events. 2442/4058 cut-off events. For 123513/123513 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24637 event pairs, 418 based on Foata normal form. 4/4060 useless extension candidates. Maximal degree in co-relation 26033. Up to 3522 conditions per place. [2024-06-21 22:01:23,701 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 172 selfloop transitions, 65 changer transitions 0/242 dead transitions. [2024-06-21 22:01:23,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 242 transitions, 3064 flow [2024-06-21 22:01:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:01:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:01:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:01:23,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 22:01:23,703 INFO L175 Difference]: Start difference. First operand has 154 places, 184 transitions, 2197 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:01:23,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 242 transitions, 3064 flow [2024-06-21 22:01:23,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 242 transitions, 2853 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:23,920 INFO L231 Difference]: Finished difference. Result has 158 places, 199 transitions, 2438 flow [2024-06-21 22:01:23,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2438, PETRI_PLACES=158, PETRI_TRANSITIONS=199} [2024-06-21 22:01:23,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-21 22:01:23,921 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 199 transitions, 2438 flow [2024-06-21 22:01:23,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:23,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:23,921 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 22:01:23,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 22:01:23,922 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:23,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:23,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1832953293, now seen corresponding path program 1 times [2024-06-21 22:01:23,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:23,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884637054] [2024-06-21 22:01:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:23,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:25,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:25,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884637054] [2024-06-21 22:01:25,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884637054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:25,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:25,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:01:25,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386499036] [2024-06-21 22:01:25,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:25,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:01:25,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:25,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:01:25,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:01:25,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:25,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 199 transitions, 2438 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:25,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:25,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:25,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:26,854 INFO L124 PetriNetUnfolderBase]: 2447/4068 cut-off events. [2024-06-21 22:01:26,855 INFO L125 PetriNetUnfolderBase]: For 126113/126113 co-relation queries the response was YES. [2024-06-21 22:01:26,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26520 conditions, 4068 events. 2447/4068 cut-off events. For 126113/126113 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24934 event pairs, 705 based on Foata normal form. 1/4067 useless extension candidates. Maximal degree in co-relation 26449. Up to 3872 conditions per place. [2024-06-21 22:01:26,887 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 199 selfloop transitions, 12 changer transitions 0/216 dead transitions. [2024-06-21 22:01:26,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 216 transitions, 2948 flow [2024-06-21 22:01:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:01:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:01:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 22:01:26,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 22:01:26,888 INFO L175 Difference]: Start difference. First operand has 158 places, 199 transitions, 2438 flow. Second operand 6 states and 100 transitions. [2024-06-21 22:01:26,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 216 transitions, 2948 flow [2024-06-21 22:01:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 216 transitions, 2757 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 22:01:27,082 INFO L231 Difference]: Finished difference. Result has 157 places, 202 transitions, 2325 flow [2024-06-21 22:01:27,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2247, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2325, PETRI_PLACES=157, PETRI_TRANSITIONS=202} [2024-06-21 22:01:27,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 22:01:27,082 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 202 transitions, 2325 flow [2024-06-21 22:01:27,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:27,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:27,083 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 22:01:27,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 22:01:27,083 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:27,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1833073263, now seen corresponding path program 2 times [2024-06-21 22:01:27,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:27,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636827531] [2024-06-21 22:01:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:28,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:28,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636827531] [2024-06-21 22:01:28,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636827531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:28,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:28,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:01:28,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447431465] [2024-06-21 22:01:28,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:28,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:01:28,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:28,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:01:28,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:01:28,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:28,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 202 transitions, 2325 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:28,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:28,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:28,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:29,821 INFO L124 PetriNetUnfolderBase]: 2444/4064 cut-off events. [2024-06-21 22:01:29,822 INFO L125 PetriNetUnfolderBase]: For 126185/126185 co-relation queries the response was YES. [2024-06-21 22:01:29,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26348 conditions, 4064 events. 2444/4064 cut-off events. For 126185/126185 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24972 event pairs, 705 based on Foata normal form. 1/4063 useless extension candidates. Maximal degree in co-relation 26277. Up to 3876 conditions per place. [2024-06-21 22:01:29,852 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 198 selfloop transitions, 12 changer transitions 0/215 dead transitions. [2024-06-21 22:01:29,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 215 transitions, 2823 flow [2024-06-21 22:01:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:01:29,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:01:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 22:01:29,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 22:01:29,854 INFO L175 Difference]: Start difference. First operand has 157 places, 202 transitions, 2325 flow. Second operand 6 states and 96 transitions. [2024-06-21 22:01:29,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 215 transitions, 2823 flow [2024-06-21 22:01:30,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 215 transitions, 2767 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 22:01:30,019 INFO L231 Difference]: Finished difference. Result has 159 places, 205 transitions, 2353 flow [2024-06-21 22:01:30,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2353, PETRI_PLACES=159, PETRI_TRANSITIONS=205} [2024-06-21 22:01:30,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 22:01:30,019 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 205 transitions, 2353 flow [2024-06-21 22:01:30,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:30,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:30,020 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 22:01:30,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 22:01:30,020 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:30,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:30,020 INFO L85 PathProgramCache]: Analyzing trace with hash 239852898, now seen corresponding path program 1 times [2024-06-21 22:01:30,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:30,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620912172] [2024-06-21 22:01:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:30,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:32,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:32,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620912172] [2024-06-21 22:01:32,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620912172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:32,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:32,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:32,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650713659] [2024-06-21 22:01:32,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:32,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:32,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:32,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:32,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 205 transitions, 2353 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:32,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:32,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:32,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:33,892 INFO L124 PetriNetUnfolderBase]: 2424/4023 cut-off events. [2024-06-21 22:01:33,892 INFO L125 PetriNetUnfolderBase]: For 130890/130890 co-relation queries the response was YES. [2024-06-21 22:01:33,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25939 conditions, 4023 events. 2424/4023 cut-off events. For 130890/130890 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24266 event pairs, 389 based on Foata normal form. 12/4033 useless extension candidates. Maximal degree in co-relation 25867. Up to 3187 conditions per place. [2024-06-21 22:01:33,924 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 167 selfloop transitions, 76 changer transitions 0/248 dead transitions. [2024-06-21 22:01:33,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 248 transitions, 2931 flow [2024-06-21 22:01:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:01:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:01:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 22:01:33,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 22:01:33,926 INFO L175 Difference]: Start difference. First operand has 159 places, 205 transitions, 2353 flow. Second operand 9 states and 161 transitions. [2024-06-21 22:01:33,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 248 transitions, 2931 flow [2024-06-21 22:01:34,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 248 transitions, 2869 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 22:01:34,073 INFO L231 Difference]: Finished difference. Result has 163 places, 204 transitions, 2390 flow [2024-06-21 22:01:34,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2390, PETRI_PLACES=163, PETRI_TRANSITIONS=204} [2024-06-21 22:01:34,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-21 22:01:34,075 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 204 transitions, 2390 flow [2024-06-21 22:01:34,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:34,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:34,075 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 22:01:34,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 22:01:34,076 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:34,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:34,076 INFO L85 PathProgramCache]: Analyzing trace with hash -822787743, now seen corresponding path program 1 times [2024-06-21 22:01:34,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:34,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697783103] [2024-06-21 22:01:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:34,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:36,256 INFO 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 22:01:36,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:36,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697783103] [2024-06-21 22:01:36,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697783103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:36,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:36,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:01:36,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126964887] [2024-06-21 22:01:36,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:36,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:01:36,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:36,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:01:36,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:01:36,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:36,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 204 transitions, 2390 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:36,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:36,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:36,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:37,477 INFO L124 PetriNetUnfolderBase]: 2437/4050 cut-off events. [2024-06-21 22:01:37,477 INFO L125 PetriNetUnfolderBase]: For 131525/131525 co-relation queries the response was YES. [2024-06-21 22:01:37,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26607 conditions, 4050 events. 2437/4050 cut-off events. For 131525/131525 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24783 event pairs, 685 based on Foata normal form. 1/4049 useless extension candidates. Maximal degree in co-relation 26534. Up to 3833 conditions per place. [2024-06-21 22:01:37,511 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 202 selfloop transitions, 23 changer transitions 0/230 dead transitions. [2024-06-21 22:01:37,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 230 transitions, 3076 flow [2024-06-21 22:01:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:01:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:01:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 22:01:37,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:01:37,513 INFO L175 Difference]: Start difference. First operand has 163 places, 204 transitions, 2390 flow. Second operand 7 states and 119 transitions. [2024-06-21 22:01:37,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 230 transitions, 3076 flow [2024-06-21 22:01:37,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 230 transitions, 2800 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 22:01:37,754 INFO L231 Difference]: Finished difference. Result has 161 places, 210 transitions, 2264 flow [2024-06-21 22:01:37,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2264, PETRI_PLACES=161, PETRI_TRANSITIONS=210} [2024-06-21 22:01:37,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 22:01:37,755 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 210 transitions, 2264 flow [2024-06-21 22:01:37,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:37,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:37,755 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 22:01:37,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 22:01:37,755 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:37,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash -822697533, now seen corresponding path program 2 times [2024-06-21 22:01:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:37,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348073442] [2024-06-21 22:01:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:40,872 INFO 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 22:01:40,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:40,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348073442] [2024-06-21 22:01:40,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348073442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:40,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:40,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:01:40,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519321646] [2024-06-21 22:01:40,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:40,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:01:40,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:40,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:01:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:01:40,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:40,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 210 transitions, 2264 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:40,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:40,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:40,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:41,879 INFO L124 PetriNetUnfolderBase]: 2434/4046 cut-off events. [2024-06-21 22:01:41,879 INFO L125 PetriNetUnfolderBase]: For 134145/134145 co-relation queries the response was YES. [2024-06-21 22:01:41,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26049 conditions, 4046 events. 2434/4046 cut-off events. For 134145/134145 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24804 event pairs, 684 based on Foata normal form. 1/4045 useless extension candidates. Maximal degree in co-relation 25977. Up to 3847 conditions per place. [2024-06-21 22:01:41,919 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 15 changer transitions 0/228 dead transitions. [2024-06-21 22:01:41,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 228 transitions, 2810 flow [2024-06-21 22:01:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:01:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:01:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 22:01:41,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 22:01:41,921 INFO L175 Difference]: Start difference. First operand has 161 places, 210 transitions, 2264 flow. Second operand 7 states and 111 transitions. [2024-06-21 22:01:41,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 228 transitions, 2810 flow [2024-06-21 22:01:42,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 228 transitions, 2751 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 22:01:42,161 INFO L231 Difference]: Finished difference. Result has 165 places, 213 transitions, 2299 flow [2024-06-21 22:01:42,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2299, PETRI_PLACES=165, PETRI_TRANSITIONS=213} [2024-06-21 22:01:42,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 22:01:42,161 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 213 transitions, 2299 flow [2024-06-21 22:01:42,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:42,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:42,162 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 22:01:42,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 22:01:42,162 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:42,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:42,162 INFO L85 PathProgramCache]: Analyzing trace with hash 986979742, now seen corresponding path program 1 times [2024-06-21 22:01:42,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:42,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426759980] [2024-06-21 22:01:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:42,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:44,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:44,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426759980] [2024-06-21 22:01:44,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426759980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:44,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:44,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:01:44,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537897276] [2024-06-21 22:01:44,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:44,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:01:44,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:01:44,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:01:44,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 213 transitions, 2299 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:44,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:44,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:44,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:45,626 INFO L124 PetriNetUnfolderBase]: 2504/4147 cut-off events. [2024-06-21 22:01:45,626 INFO L125 PetriNetUnfolderBase]: For 149063/149063 co-relation queries the response was YES. [2024-06-21 22:01:45,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27482 conditions, 4147 events. 2504/4147 cut-off events. For 149063/149063 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 25340 event pairs, 643 based on Foata normal form. 6/4148 useless extension candidates. Maximal degree in co-relation 27408. Up to 3818 conditions per place. [2024-06-21 22:01:45,657 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 199 selfloop transitions, 37 changer transitions 0/241 dead transitions. [2024-06-21 22:01:45,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 241 transitions, 3087 flow [2024-06-21 22:01:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:01:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:01:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 22:01:45,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 22:01:45,668 INFO L175 Difference]: Start difference. First operand has 165 places, 213 transitions, 2299 flow. Second operand 7 states and 122 transitions. [2024-06-21 22:01:45,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 241 transitions, 3087 flow [2024-06-21 22:01:45,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 241 transitions, 3015 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 22:01:45,872 INFO L231 Difference]: Finished difference. Result has 168 places, 223 transitions, 2515 flow [2024-06-21 22:01:45,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2515, PETRI_PLACES=168, PETRI_TRANSITIONS=223} [2024-06-21 22:01:45,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 22:01:45,873 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 223 transitions, 2515 flow [2024-06-21 22:01:45,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:45,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:45,873 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 22:01:45,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 22:01:45,874 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:45,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:45,874 INFO L85 PathProgramCache]: Analyzing trace with hash -675087778, now seen corresponding path program 2 times [2024-06-21 22:01:45,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:45,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439844861] [2024-06-21 22:01:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:45,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:47,659 INFO 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 22:01:47,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:47,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439844861] [2024-06-21 22:01:47,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439844861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:47,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:47,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:01:47,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947055758] [2024-06-21 22:01:47,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:47,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:01:47,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:47,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:01:47,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:01:47,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:47,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 223 transitions, 2515 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:47,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:47,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:47,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:48,840 INFO L124 PetriNetUnfolderBase]: 2566/4216 cut-off events. [2024-06-21 22:01:48,840 INFO L125 PetriNetUnfolderBase]: For 163672/163672 co-relation queries the response was YES. [2024-06-21 22:01:48,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29235 conditions, 4216 events. 2566/4216 cut-off events. For 163672/163672 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25565 event pairs, 613 based on Foata normal form. 6/4212 useless extension candidates. Maximal degree in co-relation 29159. Up to 3788 conditions per place. [2024-06-21 22:01:48,879 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 197 selfloop transitions, 48 changer transitions 0/250 dead transitions. [2024-06-21 22:01:48,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 250 transitions, 3373 flow [2024-06-21 22:01:48,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:01:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:01:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 22:01:48,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 22:01:48,884 INFO L175 Difference]: Start difference. First operand has 168 places, 223 transitions, 2515 flow. Second operand 7 states and 121 transitions. [2024-06-21 22:01:48,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 250 transitions, 3373 flow [2024-06-21 22:01:49,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 250 transitions, 3213 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 22:01:49,160 INFO L231 Difference]: Finished difference. Result has 171 places, 231 transitions, 2652 flow [2024-06-21 22:01:49,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2652, PETRI_PLACES=171, PETRI_TRANSITIONS=231} [2024-06-21 22:01:49,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 22:01:49,160 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 231 transitions, 2652 flow [2024-06-21 22:01:49,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:49,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:49,161 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 22:01:49,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 22:01:49,161 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:49,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:49,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1900346365, now seen corresponding path program 3 times [2024-06-21 22:01:49,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:49,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227877373] [2024-06-21 22:01:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:49,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:51,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:51,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227877373] [2024-06-21 22:01:51,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227877373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:51,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:51,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:01:51,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103992921] [2024-06-21 22:01:51,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:51,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:01:51,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:51,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:01:51,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:01:51,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:51,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 231 transitions, 2652 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:51,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:51,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:51,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:52,387 INFO L124 PetriNetUnfolderBase]: 2563/4231 cut-off events. [2024-06-21 22:01:52,388 INFO L125 PetriNetUnfolderBase]: For 165946/165946 co-relation queries the response was YES. [2024-06-21 22:01:52,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29429 conditions, 4231 events. 2563/4231 cut-off events. For 165946/165946 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25881 event pairs, 692 based on Foata normal form. 1/4230 useless extension candidates. Maximal degree in co-relation 29352. Up to 4036 conditions per place. [2024-06-21 22:01:52,426 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 222 selfloop transitions, 15 changer transitions 0/242 dead transitions. [2024-06-21 22:01:52,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 242 transitions, 3158 flow [2024-06-21 22:01:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:01:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:01:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-21 22:01:52,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-21 22:01:52,428 INFO L175 Difference]: Start difference. First operand has 171 places, 231 transitions, 2652 flow. Second operand 7 states and 107 transitions. [2024-06-21 22:01:52,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 242 transitions, 3158 flow [2024-06-21 22:01:52,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 242 transitions, 2999 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-21 22:01:52,699 INFO L231 Difference]: Finished difference. Result has 175 places, 231 transitions, 2529 flow [2024-06-21 22:01:52,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2529, PETRI_PLACES=175, PETRI_TRANSITIONS=231} [2024-06-21 22:01:52,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-21 22:01:52,700 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 231 transitions, 2529 flow [2024-06-21 22:01:52,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:52,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:52,700 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 22:01:52,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 22:01:52,700 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:52,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1900553910, now seen corresponding path program 3 times [2024-06-21 22:01:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257819762] [2024-06-21 22:01:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:52,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:54,370 INFO 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 22:01:54,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:54,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257819762] [2024-06-21 22:01:54,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257819762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:54,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:54,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:01:54,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173220082] [2024-06-21 22:01:54,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:54,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:01:54,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:54,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:01:54,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:01:54,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:54,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 231 transitions, 2529 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:54,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:54,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:54,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:55,662 INFO L124 PetriNetUnfolderBase]: 2585/4245 cut-off events. [2024-06-21 22:01:55,662 INFO L125 PetriNetUnfolderBase]: For 172751/172751 co-relation queries the response was YES. [2024-06-21 22:01:55,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29441 conditions, 4245 events. 2585/4245 cut-off events. For 172751/172751 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25727 event pairs, 610 based on Foata normal form. 6/4241 useless extension candidates. Maximal degree in co-relation 29362. Up to 3919 conditions per place. [2024-06-21 22:01:55,696 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 206 selfloop transitions, 46 changer transitions 0/257 dead transitions. [2024-06-21 22:01:55,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 257 transitions, 3247 flow [2024-06-21 22:01:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:01:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:01:55,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 22:01:55,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 22:01:55,698 INFO L175 Difference]: Start difference. First operand has 175 places, 231 transitions, 2529 flow. Second operand 7 states and 117 transitions. [2024-06-21 22:01:55,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 257 transitions, 3247 flow [2024-06-21 22:01:55,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 257 transitions, 3207 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:55,962 INFO L231 Difference]: Finished difference. Result has 178 places, 242 transitions, 2769 flow [2024-06-21 22:01:55,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2769, PETRI_PLACES=178, PETRI_TRANSITIONS=242} [2024-06-21 22:01:55,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 22:01:55,963 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 242 transitions, 2769 flow [2024-06-21 22:01:55,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:55,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:55,964 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 22:01:55,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 22:01:55,964 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:55,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash -674872452, now seen corresponding path program 1 times [2024-06-21 22:01:55,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:55,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712550863] [2024-06-21 22:01:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:58,510 INFO 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 22:01:58,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:58,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712550863] [2024-06-21 22:01:58,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712550863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:58,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:01:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227450056] [2024-06-21 22:01:58,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:58,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:01:58,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:01:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:01:58,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:01:58,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 242 transitions, 2769 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 22:01:58,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:58,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:01:58,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:59,980 INFO L124 PetriNetUnfolderBase]: 2624/4304 cut-off events. [2024-06-21 22:01:59,981 INFO L125 PetriNetUnfolderBase]: For 186605/186605 co-relation queries the response was YES. [2024-06-21 22:02:00,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30286 conditions, 4304 events. 2624/4304 cut-off events. For 186605/186605 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26094 event pairs, 615 based on Foata normal form. 14/4307 useless extension candidates. Maximal degree in co-relation 30204. Up to 3923 conditions per place. [2024-06-21 22:02:00,018 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 209 selfloop transitions, 49 changer transitions 0/263 dead transitions. [2024-06-21 22:02:00,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 263 transitions, 3451 flow [2024-06-21 22:02:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:00,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 22:02:00,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 22:02:00,024 INFO L175 Difference]: Start difference. First operand has 178 places, 242 transitions, 2769 flow. Second operand 7 states and 121 transitions. [2024-06-21 22:02:00,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 263 transitions, 3451 flow [2024-06-21 22:02:00,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 263 transitions, 3327 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:00,326 INFO L231 Difference]: Finished difference. Result has 182 places, 244 transitions, 2794 flow [2024-06-21 22:02:00,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2794, PETRI_PLACES=182, PETRI_TRANSITIONS=244} [2024-06-21 22:02:00,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 22:02:00,327 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 244 transitions, 2794 flow [2024-06-21 22:02:00,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 22:02:00,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:00,327 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 22:02:00,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 22:02:00,343 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:00,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:00,343 INFO L85 PathProgramCache]: Analyzing trace with hash 434643118, now seen corresponding path program 1 times [2024-06-21 22:02:00,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:00,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955350461] [2024-06-21 22:02:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:00,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:02,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:02,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955350461] [2024-06-21 22:02:02,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955350461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:02,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:02,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:02,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998971367] [2024-06-21 22:02:02,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:02,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:02,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:02,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:02,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:02,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:02,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 244 transitions, 2794 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:02,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:02,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:02,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:04,079 INFO L124 PetriNetUnfolderBase]: 2634/4338 cut-off events. [2024-06-21 22:02:04,079 INFO L125 PetriNetUnfolderBase]: For 179628/179628 co-relation queries the response was YES. [2024-06-21 22:02:04,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30532 conditions, 4338 events. 2634/4338 cut-off events. For 179628/179628 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 26455 event pairs, 643 based on Foata normal form. 2/4338 useless extension candidates. Maximal degree in co-relation 30449. Up to 4084 conditions per place. [2024-06-21 22:02:04,119 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 24 changer transitions 0/270 dead transitions. [2024-06-21 22:02:04,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 270 transitions, 3479 flow [2024-06-21 22:02:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 22:02:04,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 22:02:04,121 INFO L175 Difference]: Start difference. First operand has 182 places, 244 transitions, 2794 flow. Second operand 7 states and 121 transitions. [2024-06-21 22:02:04,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 270 transitions, 3479 flow [2024-06-21 22:02:04,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 270 transitions, 3354 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:04,471 INFO L231 Difference]: Finished difference. Result has 184 places, 248 transitions, 2816 flow [2024-06-21 22:02:04,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2816, PETRI_PLACES=184, PETRI_TRANSITIONS=248} [2024-06-21 22:02:04,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 22:02:04,472 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 248 transitions, 2816 flow [2024-06-21 22:02:04,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:04,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:04,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:04,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 22:02:04,472 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:04,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:04,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1851781876, now seen corresponding path program 2 times [2024-06-21 22:02:04,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:04,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038933314] [2024-06-21 22:02:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:04,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:06,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:06,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038933314] [2024-06-21 22:02:06,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038933314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:06,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:06,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:06,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821225501] [2024-06-21 22:02:06,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:06,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:06,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:06,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:06,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:06,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 248 transitions, 2816 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:06,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:06,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:06,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:07,541 INFO L124 PetriNetUnfolderBase]: 2644/4354 cut-off events. [2024-06-21 22:02:07,541 INFO L125 PetriNetUnfolderBase]: For 184530/184530 co-relation queries the response was YES. [2024-06-21 22:02:07,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30617 conditions, 4354 events. 2644/4354 cut-off events. For 184530/184530 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26568 event pairs, 611 based on Foata normal form. 2/4354 useless extension candidates. Maximal degree in co-relation 30533. Up to 4022 conditions per place. [2024-06-21 22:02:07,578 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 222 selfloop transitions, 46 changer transitions 0/273 dead transitions. [2024-06-21 22:02:07,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 273 transitions, 3548 flow [2024-06-21 22:02:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 22:02:07,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 22:02:07,579 INFO L175 Difference]: Start difference. First operand has 184 places, 248 transitions, 2816 flow. Second operand 7 states and 124 transitions. [2024-06-21 22:02:07,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 273 transitions, 3548 flow [2024-06-21 22:02:07,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 273 transitions, 3444 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:07,879 INFO L231 Difference]: Finished difference. Result has 186 places, 251 transitions, 2892 flow [2024-06-21 22:02:07,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2712, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2892, PETRI_PLACES=186, PETRI_TRANSITIONS=251} [2024-06-21 22:02:07,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 22:02:07,880 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 251 transitions, 2892 flow [2024-06-21 22:02:07,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:07,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:07,880 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 22:02:07,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 22:02:07,881 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:07,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash -732114474, now seen corresponding path program 3 times [2024-06-21 22:02:07,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:07,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726613406] [2024-06-21 22:02:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:07,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:10,342 INFO 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 22:02:10,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:10,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726613406] [2024-06-21 22:02:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726613406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:10,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:10,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:10,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093242715] [2024-06-21 22:02:10,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:10,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:10,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:10,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:10,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:10,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:10,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 251 transitions, 2892 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:10,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:10,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:10,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:11,608 INFO L124 PetriNetUnfolderBase]: 2642/4359 cut-off events. [2024-06-21 22:02:11,609 INFO L125 PetriNetUnfolderBase]: For 189892/189892 co-relation queries the response was YES. [2024-06-21 22:02:11,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30744 conditions, 4359 events. 2642/4359 cut-off events. For 189892/189892 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26719 event pairs, 653 based on Foata normal form. 2/4356 useless extension candidates. Maximal degree in co-relation 30659. Up to 4062 conditions per place. [2024-06-21 22:02:11,649 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 30 changer transitions 0/273 dead transitions. [2024-06-21 22:02:11,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 273 transitions, 3558 flow [2024-06-21 22:02:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:11,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 22:02:11,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 22:02:11,651 INFO L175 Difference]: Start difference. First operand has 186 places, 251 transitions, 2892 flow. Second operand 7 states and 120 transitions. [2024-06-21 22:02:11,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 273 transitions, 3558 flow [2024-06-21 22:02:11,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 273 transitions, 3449 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:11,966 INFO L231 Difference]: Finished difference. Result has 189 places, 254 transitions, 2923 flow [2024-06-21 22:02:11,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2923, PETRI_PLACES=189, PETRI_TRANSITIONS=254} [2024-06-21 22:02:11,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 22:02:11,966 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 254 transitions, 2923 flow [2024-06-21 22:02:11,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:11,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:11,967 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 22:02:11,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 22:02:11,967 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:11,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash 520490030, now seen corresponding path program 4 times [2024-06-21 22:02:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:11,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62105769] [2024-06-21 22:02:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:11,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:14,324 INFO 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 22:02:14,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:14,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62105769] [2024-06-21 22:02:14,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62105769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:14,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:14,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:14,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782275787] [2024-06-21 22:02:14,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:14,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:14,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:14,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:14,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:14,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:14,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 254 transitions, 2923 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:14,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:14,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:14,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:15,568 INFO L124 PetriNetUnfolderBase]: 2629/4346 cut-off events. [2024-06-21 22:02:15,569 INFO L125 PetriNetUnfolderBase]: For 192800/192800 co-relation queries the response was YES. [2024-06-21 22:02:15,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30487 conditions, 4346 events. 2629/4346 cut-off events. For 192800/192800 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26743 event pairs, 648 based on Foata normal form. 3/4343 useless extension candidates. Maximal degree in co-relation 30401. Up to 4000 conditions per place. [2024-06-21 22:02:15,606 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 224 selfloop transitions, 42 changer transitions 0/271 dead transitions. [2024-06-21 22:02:15,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 271 transitions, 3515 flow [2024-06-21 22:02:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 22:02:15,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 22:02:15,608 INFO L175 Difference]: Start difference. First operand has 189 places, 254 transitions, 2923 flow. Second operand 7 states and 120 transitions. [2024-06-21 22:02:15,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 271 transitions, 3515 flow [2024-06-21 22:02:15,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 271 transitions, 3351 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:15,983 INFO L231 Difference]: Finished difference. Result has 191 places, 254 transitions, 2851 flow [2024-06-21 22:02:15,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2851, PETRI_PLACES=191, PETRI_TRANSITIONS=254} [2024-06-21 22:02:15,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 22:02:15,983 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 254 transitions, 2851 flow [2024-06-21 22:02:15,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:15,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:15,984 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 22:02:15,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 22:02:15,984 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:15,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:15,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1218811374, now seen corresponding path program 5 times [2024-06-21 22:02:15,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:15,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594284174] [2024-06-21 22:02:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:15,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:17,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:17,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594284174] [2024-06-21 22:02:17,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594284174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:17,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:17,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:17,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421799769] [2024-06-21 22:02:17,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:17,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:17,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:17,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:17,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:17,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:17,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 254 transitions, 2851 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:17,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:17,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:17,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:19,422 INFO L124 PetriNetUnfolderBase]: 2761/4531 cut-off events. [2024-06-21 22:02:19,422 INFO L125 PetriNetUnfolderBase]: For 226164/226164 co-relation queries the response was YES. [2024-06-21 22:02:19,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33038 conditions, 4531 events. 2761/4531 cut-off events. For 226164/226164 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27708 event pairs, 539 based on Foata normal form. 6/4526 useless extension candidates. Maximal degree in co-relation 32951. Up to 3532 conditions per place. [2024-06-21 22:02:19,468 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 174 selfloop transitions, 113 changer transitions 0/292 dead transitions. [2024-06-21 22:02:19,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 292 transitions, 4010 flow [2024-06-21 22:02:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:02:19,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:02:19,470 INFO L175 Difference]: Start difference. First operand has 191 places, 254 transitions, 2851 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:02:19,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 292 transitions, 4010 flow [2024-06-21 22:02:19,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 292 transitions, 3894 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:19,905 INFO L231 Difference]: Finished difference. Result has 195 places, 265 transitions, 3299 flow [2024-06-21 22:02:19,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3299, PETRI_PLACES=195, PETRI_TRANSITIONS=265} [2024-06-21 22:02:19,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 22:02:19,906 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 265 transitions, 3299 flow [2024-06-21 22:02:19,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:19,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:19,912 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 22:02:19,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 22:02:19,912 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:19,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1225477614, now seen corresponding path program 6 times [2024-06-21 22:02:19,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:19,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548299820] [2024-06-21 22:02:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:19,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:21,689 INFO 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 22:02:21,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548299820] [2024-06-21 22:02:21,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548299820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:21,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:21,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:21,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695432166] [2024-06-21 22:02:21,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:21,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:21,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:21,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:21,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:21,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:21,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 265 transitions, 3299 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:21,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:21,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:21,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:23,280 INFO L124 PetriNetUnfolderBase]: 2751/4513 cut-off events. [2024-06-21 22:02:23,281 INFO L125 PetriNetUnfolderBase]: For 235886/235886 co-relation queries the response was YES. [2024-06-21 22:02:23,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34401 conditions, 4513 events. 2751/4513 cut-off events. For 235886/235886 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27535 event pairs, 660 based on Foata normal form. 6/4508 useless extension candidates. Maximal degree in co-relation 34311. Up to 4165 conditions per place. [2024-06-21 22:02:23,327 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 233 selfloop transitions, 45 changer transitions 0/283 dead transitions. [2024-06-21 22:02:23,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 283 transitions, 4033 flow [2024-06-21 22:02:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 22:02:23,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 22:02:23,329 INFO L175 Difference]: Start difference. First operand has 195 places, 265 transitions, 3299 flow. Second operand 7 states and 117 transitions. [2024-06-21 22:02:23,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 283 transitions, 4033 flow [2024-06-21 22:02:23,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 283 transitions, 3900 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:23,839 INFO L231 Difference]: Finished difference. Result has 199 places, 268 transitions, 3353 flow [2024-06-21 22:02:23,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3353, PETRI_PLACES=199, PETRI_TRANSITIONS=268} [2024-06-21 22:02:23,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-21 22:02:23,840 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 268 transitions, 3353 flow [2024-06-21 22:02:23,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:23,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:23,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:23,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 22:02:23,841 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:23,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash 263325676, now seen corresponding path program 1 times [2024-06-21 22:02:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:23,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861593485] [2024-06-21 22:02:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:23,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:26,266 INFO 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 22:02:26,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:26,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861593485] [2024-06-21 22:02:26,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861593485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:26,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:26,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:26,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552974822] [2024-06-21 22:02:26,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:26,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:26,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:26,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:26,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:26,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:26,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 268 transitions, 3353 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:26,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:26,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:26,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:27,756 INFO L124 PetriNetUnfolderBase]: 2772/4551 cut-off events. [2024-06-21 22:02:27,757 INFO L125 PetriNetUnfolderBase]: For 238848/238848 co-relation queries the response was YES. [2024-06-21 22:02:27,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34749 conditions, 4551 events. 2772/4551 cut-off events. For 238848/238848 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27923 event pairs, 700 based on Foata normal form. 2/4551 useless extension candidates. Maximal degree in co-relation 34657. Up to 4280 conditions per place. [2024-06-21 22:02:27,806 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 28 changer transitions 0/299 dead transitions. [2024-06-21 22:02:27,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 299 transitions, 4233 flow [2024-06-21 22:02:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:02:27,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:02:27,808 INFO L175 Difference]: Start difference. First operand has 199 places, 268 transitions, 3353 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:02:27,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 299 transitions, 4233 flow [2024-06-21 22:02:28,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 299 transitions, 4037 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:28,374 INFO L231 Difference]: Finished difference. Result has 201 places, 272 transitions, 3322 flow [2024-06-21 22:02:28,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3322, PETRI_PLACES=201, PETRI_TRANSITIONS=272} [2024-06-21 22:02:28,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 22:02:28,375 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 272 transitions, 3322 flow [2024-06-21 22:02:28,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:28,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:28,376 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 22:02:28,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 22:02:28,376 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:28,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:28,376 INFO L85 PathProgramCache]: Analyzing trace with hash 528801998, now seen corresponding path program 2 times [2024-06-21 22:02:28,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:28,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711493212] [2024-06-21 22:02:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:28,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:30,524 INFO 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 22:02:30,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:30,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711493212] [2024-06-21 22:02:30,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711493212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:30,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:30,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:30,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382921216] [2024-06-21 22:02:30,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:30,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:30,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:30,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:30,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:30,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:30,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 272 transitions, 3322 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:30,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:30,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:30,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:31,872 INFO L124 PetriNetUnfolderBase]: 2780/4577 cut-off events. [2024-06-21 22:02:31,872 INFO L125 PetriNetUnfolderBase]: For 243144/243144 co-relation queries the response was YES. [2024-06-21 22:02:31,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34777 conditions, 4577 events. 2780/4577 cut-off events. For 243144/243144 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28127 event pairs, 738 based on Foata normal form. 2/4577 useless extension candidates. Maximal degree in co-relation 34684. Up to 4327 conditions per place. [2024-06-21 22:02:31,921 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 25 changer transitions 0/295 dead transitions. [2024-06-21 22:02:31,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 295 transitions, 4024 flow [2024-06-21 22:02:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 22:02:31,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 22:02:31,923 INFO L175 Difference]: Start difference. First operand has 201 places, 272 transitions, 3322 flow. Second operand 8 states and 130 transitions. [2024-06-21 22:02:31,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 295 transitions, 4024 flow [2024-06-21 22:02:32,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 295 transitions, 3927 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:32,418 INFO L231 Difference]: Finished difference. Result has 205 places, 274 transitions, 3338 flow [2024-06-21 22:02:32,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3338, PETRI_PLACES=205, PETRI_TRANSITIONS=274} [2024-06-21 22:02:32,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 22:02:32,419 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 274 transitions, 3338 flow [2024-06-21 22:02:32,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:32,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:32,420 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 22:02:32,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 22:02:32,420 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:32,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash 528802122, now seen corresponding path program 1 times [2024-06-21 22:02:32,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:32,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143175430] [2024-06-21 22:02:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:32,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:35,153 INFO 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 22:02:35,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:35,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143175430] [2024-06-21 22:02:35,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143175430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:35,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:35,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:35,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482215215] [2024-06-21 22:02:35,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:35,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:35,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:35,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:35,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:35,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:35,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 274 transitions, 3338 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:35,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:35,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:35,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:36,949 INFO L124 PetriNetUnfolderBase]: 2914/4766 cut-off events. [2024-06-21 22:02:36,949 INFO L125 PetriNetUnfolderBase]: For 274284/274284 co-relation queries the response was YES. [2024-06-21 22:02:36,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37230 conditions, 4766 events. 2914/4766 cut-off events. For 274284/274284 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29198 event pairs, 692 based on Foata normal form. 6/4767 useless extension candidates. Maximal degree in co-relation 37135. Up to 4221 conditions per place. [2024-06-21 22:02:37,005 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 77 changer transitions 0/315 dead transitions. [2024-06-21 22:02:37,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 315 transitions, 4616 flow [2024-06-21 22:02:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:02:37,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:02:37,014 INFO L175 Difference]: Start difference. First operand has 205 places, 274 transitions, 3338 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:02:37,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 315 transitions, 4616 flow [2024-06-21 22:02:37,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 315 transitions, 4535 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:37,608 INFO L231 Difference]: Finished difference. Result has 208 places, 288 transitions, 3768 flow [2024-06-21 22:02:37,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3257, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3768, PETRI_PLACES=208, PETRI_TRANSITIONS=288} [2024-06-21 22:02:37,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 22:02:37,608 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 288 transitions, 3768 flow [2024-06-21 22:02:37,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:37,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:37,609 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 22:02:37,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 22:02:37,609 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:37,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:37,609 INFO L85 PathProgramCache]: Analyzing trace with hash 266187410, now seen corresponding path program 2 times [2024-06-21 22:02:37,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:37,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910792000] [2024-06-21 22:02:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:37,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:40,512 INFO 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 22:02:40,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:40,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910792000] [2024-06-21 22:02:40,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910792000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:40,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:40,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:40,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024512702] [2024-06-21 22:02:40,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:40,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:40,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:40,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:40,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:40,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:40,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 288 transitions, 3768 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:40,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:40,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:40,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:41,980 INFO L124 PetriNetUnfolderBase]: 2944/4807 cut-off events. [2024-06-21 22:02:41,980 INFO L125 PetriNetUnfolderBase]: For 289623/289623 co-relation queries the response was YES. [2024-06-21 22:02:42,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38868 conditions, 4807 events. 2944/4807 cut-off events. For 289623/289623 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29442 event pairs, 701 based on Foata normal form. 6/4807 useless extension candidates. Maximal degree in co-relation 38771. Up to 4427 conditions per place. [2024-06-21 22:02:42,040 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 257 selfloop transitions, 50 changer transitions 0/312 dead transitions. [2024-06-21 22:02:42,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 312 transitions, 4580 flow [2024-06-21 22:02:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:02:42,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:02:42,042 INFO L175 Difference]: Start difference. First operand has 208 places, 288 transitions, 3768 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:02:42,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 312 transitions, 4580 flow [2024-06-21 22:02:42,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 312 transitions, 4411 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:42,809 INFO L231 Difference]: Finished difference. Result has 213 places, 293 transitions, 3841 flow [2024-06-21 22:02:42,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3613, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3841, PETRI_PLACES=213, PETRI_TRANSITIONS=293} [2024-06-21 22:02:42,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 22:02:42,810 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 293 transitions, 3841 flow [2024-06-21 22:02:42,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:42,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:42,810 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 22:02:42,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 22:02:42,811 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:42,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:42,811 INFO L85 PathProgramCache]: Analyzing trace with hash 266182636, now seen corresponding path program 3 times [2024-06-21 22:02:42,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:42,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305189520] [2024-06-21 22:02:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:45,976 INFO 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 22:02:45,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:45,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305189520] [2024-06-21 22:02:45,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305189520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:45,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:45,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202637848] [2024-06-21 22:02:45,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:45,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:45,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:45,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:45,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:45,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:45,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 293 transitions, 3841 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:45,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:45,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:45,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:47,349 INFO L124 PetriNetUnfolderBase]: 2939/4800 cut-off events. [2024-06-21 22:02:47,350 INFO L125 PetriNetUnfolderBase]: For 285311/285311 co-relation queries the response was YES. [2024-06-21 22:02:47,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38418 conditions, 4800 events. 2939/4800 cut-off events. For 285311/285311 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29425 event pairs, 748 based on Foata normal form. 2/4800 useless extension candidates. Maximal degree in co-relation 38319. Up to 4565 conditions per place. [2024-06-21 22:02:47,402 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 290 selfloop transitions, 16 changer transitions 0/311 dead transitions. [2024-06-21 22:02:47,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 311 transitions, 4561 flow [2024-06-21 22:02:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 22:02:47,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 22:02:47,404 INFO L175 Difference]: Start difference. First operand has 213 places, 293 transitions, 3841 flow. Second operand 7 states and 112 transitions. [2024-06-21 22:02:47,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 311 transitions, 4561 flow [2024-06-21 22:02:48,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 311 transitions, 4381 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:48,032 INFO L231 Difference]: Finished difference. Result has 214 places, 295 transitions, 3760 flow [2024-06-21 22:02:48,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3760, PETRI_PLACES=214, PETRI_TRANSITIONS=295} [2024-06-21 22:02:48,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 22:02:48,033 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 295 transitions, 3760 flow [2024-06-21 22:02:48,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:48,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:48,033 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 22:02:48,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 22:02:48,033 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:48,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:48,034 INFO L85 PathProgramCache]: Analyzing trace with hash 266182760, now seen corresponding path program 3 times [2024-06-21 22:02:48,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:48,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817560576] [2024-06-21 22:02:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:48,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:51,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:51,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817560576] [2024-06-21 22:02:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817560576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:51,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:51,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:51,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418906347] [2024-06-21 22:02:51,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:51,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:51,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:51,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:51,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 295 transitions, 3760 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:51,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:51,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:51,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:52,765 INFO L124 PetriNetUnfolderBase]: 3017/4905 cut-off events. [2024-06-21 22:02:52,765 INFO L125 PetriNetUnfolderBase]: For 304011/304011 co-relation queries the response was YES. [2024-06-21 22:02:52,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39527 conditions, 4905 events. 3017/4905 cut-off events. For 304011/304011 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29923 event pairs, 674 based on Foata normal form. 8/4903 useless extension candidates. Maximal degree in co-relation 39427. Up to 4169 conditions per place. [2024-06-21 22:02:52,816 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 233 selfloop transitions, 100 changer transitions 0/338 dead transitions. [2024-06-21 22:02:52,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 338 transitions, 5186 flow [2024-06-21 22:02:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:02:52,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:02:52,818 INFO L175 Difference]: Start difference. First operand has 214 places, 295 transitions, 3760 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:02:52,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 338 transitions, 5186 flow [2024-06-21 22:02:53,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 338 transitions, 5103 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:53,718 INFO L231 Difference]: Finished difference. Result has 220 places, 313 transitions, 4383 flow [2024-06-21 22:02:53,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4383, PETRI_PLACES=220, PETRI_TRANSITIONS=313} [2024-06-21 22:02:53,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-21 22:02:53,718 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 313 transitions, 4383 flow [2024-06-21 22:02:53,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:53,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:53,719 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 22:02:53,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 22:02:53,719 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:53,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:53,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2072789714, now seen corresponding path program 1 times [2024-06-21 22:02:53,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:53,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336962634] [2024-06-21 22:02:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:53,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:56,043 INFO 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 22:02:56,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:56,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336962634] [2024-06-21 22:02:56,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336962634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:56,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:56,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:56,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371356694] [2024-06-21 22:02:56,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:56,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:56,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:56,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:56,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:56,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:02:56,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 313 transitions, 4383 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:56,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:56,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:02:56,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:57,605 INFO L124 PetriNetUnfolderBase]: 3020/4899 cut-off events. [2024-06-21 22:02:57,605 INFO L125 PetriNetUnfolderBase]: For 312123/312123 co-relation queries the response was YES. [2024-06-21 22:02:57,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41092 conditions, 4899 events. 3020/4899 cut-off events. For 312123/312123 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 29790 event pairs, 675 based on Foata normal form. 3/4891 useless extension candidates. Maximal degree in co-relation 40988. Up to 4513 conditions per place. [2024-06-21 22:02:57,667 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 55 changer transitions 0/331 dead transitions. [2024-06-21 22:02:57,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 331 transitions, 5225 flow [2024-06-21 22:02:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 22:02:57,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:02:57,669 INFO L175 Difference]: Start difference. First operand has 220 places, 313 transitions, 4383 flow. Second operand 7 states and 119 transitions. [2024-06-21 22:02:57,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 331 transitions, 5225 flow [2024-06-21 22:02:58,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 331 transitions, 4994 flow, removed 95 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:58,467 INFO L231 Difference]: Finished difference. Result has 224 places, 316 transitions, 4370 flow [2024-06-21 22:02:58,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4370, PETRI_PLACES=224, PETRI_TRANSITIONS=316} [2024-06-21 22:02:58,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 22:02:58,468 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 316 transitions, 4370 flow [2024-06-21 22:02:58,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:58,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:58,468 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 22:02:58,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 22:02:58,468 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:58,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:58,469 INFO L85 PathProgramCache]: Analyzing trace with hash 553546804, now seen corresponding path program 4 times [2024-06-21 22:02:58,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:58,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711279607] [2024-06-21 22:02:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:58,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:01,434 INFO 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 22:03:01,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:01,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711279607] [2024-06-21 22:03:01,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711279607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:01,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:01,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:01,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052250506] [2024-06-21 22:03:01,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:01,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:01,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:01,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:01,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:01,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 316 transitions, 4370 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:01,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:01,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:01,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:03,289 INFO L124 PetriNetUnfolderBase]: 3184/5158 cut-off events. [2024-06-21 22:03:03,289 INFO L125 PetriNetUnfolderBase]: For 355347/355347 co-relation queries the response was YES. [2024-06-21 22:03:03,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44057 conditions, 5158 events. 3184/5158 cut-off events. For 355347/355347 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31744 event pairs, 559 based on Foata normal form. 6/5153 useless extension candidates. Maximal degree in co-relation 43952. Up to 4224 conditions per place. [2024-06-21 22:03:03,452 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 248 selfloop transitions, 134 changer transitions 0/387 dead transitions. [2024-06-21 22:03:03,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 387 transitions, 6310 flow [2024-06-21 22:03:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 22:03:03,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 22:03:03,454 INFO L175 Difference]: Start difference. First operand has 224 places, 316 transitions, 4370 flow. Second operand 10 states and 177 transitions. [2024-06-21 22:03:03,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 387 transitions, 6310 flow [2024-06-21 22:03:04,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 387 transitions, 6081 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:04,124 INFO L231 Difference]: Finished difference. Result has 231 places, 352 transitions, 5330 flow [2024-06-21 22:03:04,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4194, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5330, PETRI_PLACES=231, PETRI_TRANSITIONS=352} [2024-06-21 22:03:04,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-21 22:03:04,125 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 352 transitions, 5330 flow [2024-06-21 22:03:04,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:04,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:04,125 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 22:03:04,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 22:03:04,125 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:04,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:04,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1218797672, now seen corresponding path program 5 times [2024-06-21 22:03:04,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:04,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792493426] [2024-06-21 22:03:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:04,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:06,262 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 22:03:06,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:06,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792493426] [2024-06-21 22:03:06,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792493426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:06,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:06,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:06,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112308284] [2024-06-21 22:03:06,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:06,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:06,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:06,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:06,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:06,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:06,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 352 transitions, 5330 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:06,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:06,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:06,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:08,140 INFO L124 PetriNetUnfolderBase]: 3234/5224 cut-off events. [2024-06-21 22:03:08,140 INFO L125 PetriNetUnfolderBase]: For 377812/377812 co-relation queries the response was YES. [2024-06-21 22:03:08,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46960 conditions, 5224 events. 3234/5224 cut-off events. For 377812/377812 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32001 event pairs, 686 based on Foata normal form. 6/5219 useless extension candidates. Maximal degree in co-relation 46852. Up to 4719 conditions per place. [2024-06-21 22:03:08,205 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 298 selfloop transitions, 87 changer transitions 0/390 dead transitions. [2024-06-21 22:03:08,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 390 transitions, 6751 flow [2024-06-21 22:03:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:03:08,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:03:08,207 INFO L175 Difference]: Start difference. First operand has 231 places, 352 transitions, 5330 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:03:08,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 390 transitions, 6751 flow [2024-06-21 22:03:09,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 390 transitions, 6556 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:09,286 INFO L231 Difference]: Finished difference. Result has 236 places, 374 transitions, 5872 flow [2024-06-21 22:03:09,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5142, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5872, PETRI_PLACES=236, PETRI_TRANSITIONS=374} [2024-06-21 22:03:09,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 22:03:09,288 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 374 transitions, 5872 flow [2024-06-21 22:03:09,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:09,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:09,289 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 22:03:09,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 22:03:09,289 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:09,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash 547113064, now seen corresponding path program 6 times [2024-06-21 22:03:09,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:09,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367015040] [2024-06-21 22:03:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:09,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:11,897 INFO 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 22:03:11,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:11,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367015040] [2024-06-21 22:03:11,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367015040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:11,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:11,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:11,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283228443] [2024-06-21 22:03:11,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:11,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:11,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:11,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:11,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:11,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:11,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 374 transitions, 5872 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:11,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:11,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:11,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:13,844 INFO L124 PetriNetUnfolderBase]: 3348/5401 cut-off events. [2024-06-21 22:03:13,844 INFO L125 PetriNetUnfolderBase]: For 422337/422337 co-relation queries the response was YES. [2024-06-21 22:03:13,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50503 conditions, 5401 events. 3348/5401 cut-off events. For 422337/422337 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 33291 event pairs, 577 based on Foata normal form. 6/5396 useless extension candidates. Maximal degree in co-relation 50391. Up to 4149 conditions per place. [2024-06-21 22:03:13,917 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 242 selfloop transitions, 173 changer transitions 0/420 dead transitions. [2024-06-21 22:03:13,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 420 transitions, 7597 flow [2024-06-21 22:03:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 22:03:13,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:03:13,922 INFO L175 Difference]: Start difference. First operand has 236 places, 374 transitions, 5872 flow. Second operand 10 states and 175 transitions. [2024-06-21 22:03:13,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 420 transitions, 7597 flow [2024-06-21 22:03:15,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 420 transitions, 7265 flow, removed 151 selfloop flow, removed 2 redundant places. [2024-06-21 22:03:15,145 INFO L231 Difference]: Finished difference. Result has 246 places, 390 transitions, 6512 flow [2024-06-21 22:03:15,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6512, PETRI_PLACES=246, PETRI_TRANSITIONS=390} [2024-06-21 22:03:15,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-21 22:03:15,146 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 390 transitions, 6512 flow [2024-06-21 22:03:15,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:15,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:15,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:15,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 22:03:15,147 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:15,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:15,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1218802446, now seen corresponding path program 4 times [2024-06-21 22:03:15,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:15,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991488997] [2024-06-21 22:03:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:15,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:17,668 INFO 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 22:03:17,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:17,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991488997] [2024-06-21 22:03:17,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991488997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:17,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:17,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:17,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520052926] [2024-06-21 22:03:17,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:17,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:17,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:17,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:17,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:17,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:17,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 390 transitions, 6512 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:17,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:17,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:17,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:19,483 INFO L124 PetriNetUnfolderBase]: 3408/5490 cut-off events. [2024-06-21 22:03:19,483 INFO L125 PetriNetUnfolderBase]: For 448015/448015 co-relation queries the response was YES. [2024-06-21 22:03:19,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53724 conditions, 5490 events. 3408/5490 cut-off events. For 448015/448015 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33625 event pairs, 606 based on Foata normal form. 2/5490 useless extension candidates. Maximal degree in co-relation 53608. Up to 4769 conditions per place. [2024-06-21 22:03:19,554 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 315 selfloop transitions, 108 changer transitions 0/428 dead transitions. [2024-06-21 22:03:19,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 428 transitions, 7925 flow [2024-06-21 22:03:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 22:03:19,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 22:03:19,556 INFO L175 Difference]: Start difference. First operand has 246 places, 390 transitions, 6512 flow. Second operand 9 states and 143 transitions. [2024-06-21 22:03:19,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 428 transitions, 7925 flow [2024-06-21 22:03:21,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 428 transitions, 7539 flow, removed 124 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:21,070 INFO L231 Difference]: Finished difference. Result has 251 places, 407 transitions, 6858 flow [2024-06-21 22:03:21,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6131, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6858, PETRI_PLACES=251, PETRI_TRANSITIONS=407} [2024-06-21 22:03:21,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-21 22:03:21,071 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 407 transitions, 6858 flow [2024-06-21 22:03:21,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:21,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:21,071 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 22:03:21,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 22:03:21,072 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:21,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:21,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1298549740, now seen corresponding path program 1 times [2024-06-21 22:03:21,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:21,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606834893] [2024-06-21 22:03:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:21,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:23,069 INFO 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 22:03:23,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:23,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606834893] [2024-06-21 22:03:23,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606834893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:23,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:23,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:23,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319358908] [2024-06-21 22:03:23,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:23,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:23,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:23,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:23,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 407 transitions, 6858 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:23,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:23,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:23,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:25,062 INFO L124 PetriNetUnfolderBase]: 3445/5550 cut-off events. [2024-06-21 22:03:25,062 INFO L125 PetriNetUnfolderBase]: For 462905/462905 co-relation queries the response was YES. [2024-06-21 22:03:25,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55143 conditions, 5550 events. 3445/5550 cut-off events. For 462905/462905 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 34050 event pairs, 730 based on Foata normal form. 1/5549 useless extension candidates. Maximal degree in co-relation 55024. Up to 5172 conditions per place. [2024-06-21 22:03:25,143 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 54 changer transitions 0/470 dead transitions. [2024-06-21 22:03:25,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 470 transitions, 8819 flow [2024-06-21 22:03:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 22:03:25,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 22:03:25,148 INFO L175 Difference]: Start difference. First operand has 251 places, 407 transitions, 6858 flow. Second operand 8 states and 150 transitions. [2024-06-21 22:03:25,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 470 transitions, 8819 flow [2024-06-21 22:03:26,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 470 transitions, 8761 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:26,399 INFO L231 Difference]: Finished difference. Result has 257 places, 437 transitions, 7691 flow [2024-06-21 22:03:26,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6804, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7691, PETRI_PLACES=257, PETRI_TRANSITIONS=437} [2024-06-21 22:03:26,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 22:03:26,412 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 437 transitions, 7691 flow [2024-06-21 22:03:26,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:26,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:26,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:26,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 22:03:26,413 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:26,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1224442374, now seen corresponding path program 2 times [2024-06-21 22:03:26,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:26,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330378516] [2024-06-21 22:03:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:26,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:29,651 INFO 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 22:03:29,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:29,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330378516] [2024-06-21 22:03:29,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330378516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:29,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:29,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:29,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860423617] [2024-06-21 22:03:29,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:29,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:29,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:29,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:29,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:29,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:29,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 437 transitions, 7691 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:29,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:29,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:29,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:31,512 INFO L124 PetriNetUnfolderBase]: 3445/5539 cut-off events. [2024-06-21 22:03:31,512 INFO L125 PetriNetUnfolderBase]: For 469984/469984 co-relation queries the response was YES. [2024-06-21 22:03:31,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55723 conditions, 5539 events. 3445/5539 cut-off events. For 469984/469984 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33922 event pairs, 686 based on Foata normal form. 4/5541 useless extension candidates. Maximal degree in co-relation 55598. Up to 5044 conditions per place. [2024-06-21 22:03:31,594 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 383 selfloop transitions, 85 changer transitions 0/473 dead transitions. [2024-06-21 22:03:31,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 473 transitions, 8973 flow [2024-06-21 22:03:31,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:03:31,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:03:31,595 INFO L175 Difference]: Start difference. First operand has 257 places, 437 transitions, 7691 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:03:31,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 473 transitions, 8973 flow [2024-06-21 22:03:32,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 473 transitions, 8863 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-21 22:03:32,935 INFO L231 Difference]: Finished difference. Result has 264 places, 446 transitions, 8028 flow [2024-06-21 22:03:32,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7583, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8028, PETRI_PLACES=264, PETRI_TRANSITIONS=446} [2024-06-21 22:03:32,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-21 22:03:32,936 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 446 transitions, 8028 flow [2024-06-21 22:03:32,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:32,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:32,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:32,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 22:03:32,936 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:32,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:32,937 INFO L85 PathProgramCache]: Analyzing trace with hash 473865120, now seen corresponding path program 3 times [2024-06-21 22:03:32,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:32,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365621778] [2024-06-21 22:03:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:32,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:35,260 INFO 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 22:03:35,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:35,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365621778] [2024-06-21 22:03:35,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365621778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:35,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:35,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:35,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915096642] [2024-06-21 22:03:35,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:35,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:35,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:35,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:35,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:35,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:35,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 446 transitions, 8028 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:35,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:35,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:35,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:37,509 INFO L124 PetriNetUnfolderBase]: 3491/5606 cut-off events. [2024-06-21 22:03:37,510 INFO L125 PetriNetUnfolderBase]: For 499151/499151 co-relation queries the response was YES. [2024-06-21 22:03:37,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57307 conditions, 5606 events. 3491/5606 cut-off events. For 499151/499151 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 34377 event pairs, 572 based on Foata normal form. 2/5606 useless extension candidates. Maximal degree in co-relation 57179. Up to 4691 conditions per place. [2024-06-21 22:03:37,585 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 324 selfloop transitions, 163 changer transitions 0/492 dead transitions. [2024-06-21 22:03:37,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 492 transitions, 9643 flow [2024-06-21 22:03:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:37,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:03:37,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 22:03:37,586 INFO L175 Difference]: Start difference. First operand has 264 places, 446 transitions, 8028 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:03:37,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 492 transitions, 9643 flow [2024-06-21 22:03:38,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 492 transitions, 9310 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:38,943 INFO L231 Difference]: Finished difference. Result has 268 places, 464 transitions, 8607 flow [2024-06-21 22:03:38,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7697, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8607, PETRI_PLACES=268, PETRI_TRANSITIONS=464} [2024-06-21 22:03:38,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 22:03:38,944 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 464 transitions, 8607 flow [2024-06-21 22:03:38,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:38,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:38,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:38,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 22:03:38,945 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:38,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash -692900542, now seen corresponding path program 4 times [2024-06-21 22:03:38,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:38,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100487842] [2024-06-21 22:03:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:38,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:42,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:42,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100487842] [2024-06-21 22:03:42,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100487842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:42,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:42,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:42,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721042917] [2024-06-21 22:03:42,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:42,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:42,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:42,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:42,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:42,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:42,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 464 transitions, 8607 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:42,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:42,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:42,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:44,157 INFO L124 PetriNetUnfolderBase]: 3509/5648 cut-off events. [2024-06-21 22:03:44,157 INFO L125 PetriNetUnfolderBase]: For 508993/508993 co-relation queries the response was YES. [2024-06-21 22:03:44,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58565 conditions, 5648 events. 3509/5648 cut-off events. For 508993/508993 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34782 event pairs, 730 based on Foata normal form. 2/5645 useless extension candidates. Maximal degree in co-relation 58436. Up to 5264 conditions per place. [2024-06-21 22:03:44,234 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 446 selfloop transitions, 45 changer transitions 0/496 dead transitions. [2024-06-21 22:03:44,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 496 transitions, 9970 flow [2024-06-21 22:03:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 22:03:44,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 22:03:44,247 INFO L175 Difference]: Start difference. First operand has 268 places, 464 transitions, 8607 flow. Second operand 9 states and 150 transitions. [2024-06-21 22:03:44,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 496 transitions, 9970 flow [2024-06-21 22:03:46,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 496 transitions, 9758 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:46,280 INFO L231 Difference]: Finished difference. Result has 274 places, 471 transitions, 8690 flow [2024-06-21 22:03:46,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8395, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8690, PETRI_PLACES=274, PETRI_TRANSITIONS=471} [2024-06-21 22:03:46,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 22:03:46,281 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 471 transitions, 8690 flow [2024-06-21 22:03:46,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:46,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:46,282 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 22:03:46,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 22:03:46,282 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:46,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:46,283 INFO L85 PathProgramCache]: Analyzing trace with hash -137217062, now seen corresponding path program 5 times [2024-06-21 22:03:46,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:46,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214660837] [2024-06-21 22:03:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:46,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:49,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:49,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214660837] [2024-06-21 22:03:49,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214660837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:49,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:49,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:49,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370969730] [2024-06-21 22:03:49,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:49,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:49,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:49,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:49,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:49,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:49,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 471 transitions, 8690 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:49,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:49,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:49,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:51,521 INFO L124 PetriNetUnfolderBase]: 3499/5636 cut-off events. [2024-06-21 22:03:51,521 INFO L125 PetriNetUnfolderBase]: For 514536/514536 co-relation queries the response was YES. [2024-06-21 22:03:51,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58594 conditions, 5636 events. 3499/5636 cut-off events. For 514536/514536 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34768 event pairs, 736 based on Foata normal form. 2/5633 useless extension candidates. Maximal degree in co-relation 58462. Up to 5280 conditions per place. [2024-06-21 22:03:51,718 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 451 selfloop transitions, 35 changer transitions 0/491 dead transitions. [2024-06-21 22:03:51,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 491 transitions, 9728 flow [2024-06-21 22:03:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 22:03:51,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 22:03:51,719 INFO L175 Difference]: Start difference. First operand has 274 places, 471 transitions, 8690 flow. Second operand 8 states and 133 transitions. [2024-06-21 22:03:51,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 491 transitions, 9728 flow [2024-06-21 22:03:53,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 491 transitions, 9529 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:53,124 INFO L231 Difference]: Finished difference. Result has 277 places, 471 transitions, 8568 flow [2024-06-21 22:03:53,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8491, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8568, PETRI_PLACES=277, PETRI_TRANSITIONS=471} [2024-06-21 22:03:53,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 22:03:53,125 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 471 transitions, 8568 flow [2024-06-21 22:03:53,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:53,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:53,125 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 22:03:53,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 22:03:53,126 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:53,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:53,128 INFO L85 PathProgramCache]: Analyzing trace with hash -342241252, now seen corresponding path program 6 times [2024-06-21 22:03:53,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:53,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025590820] [2024-06-21 22:03:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:53,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:55,410 INFO 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 22:03:55,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:55,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025590820] [2024-06-21 22:03:55,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025590820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:55,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:55,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:55,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333455683] [2024-06-21 22:03:55,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:55,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:55,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:55,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:55,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:55,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:03:55,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 471 transitions, 8568 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:55,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:55,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:03:55,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:57,354 INFO L124 PetriNetUnfolderBase]: 3536/5692 cut-off events. [2024-06-21 22:03:57,355 INFO L125 PetriNetUnfolderBase]: For 524557/524557 co-relation queries the response was YES. [2024-06-21 22:03:57,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59262 conditions, 5692 events. 3536/5692 cut-off events. For 524557/524557 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 35165 event pairs, 740 based on Foata normal form. 1/5688 useless extension candidates. Maximal degree in co-relation 59129. Up to 5022 conditions per place. [2024-06-21 22:03:57,439 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 131 changer transitions 0/546 dead transitions. [2024-06-21 22:03:57,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 546 transitions, 11060 flow [2024-06-21 22:03:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 22:03:57,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 22:03:57,441 INFO L175 Difference]: Start difference. First operand has 277 places, 471 transitions, 8568 flow. Second operand 8 states and 149 transitions. [2024-06-21 22:03:57,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 546 transitions, 11060 flow [2024-06-21 22:03:59,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 546 transitions, 10974 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:03:59,156 INFO L231 Difference]: Finished difference. Result has 281 places, 508 transitions, 9744 flow [2024-06-21 22:03:59,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8484, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9744, PETRI_PLACES=281, PETRI_TRANSITIONS=508} [2024-06-21 22:03:59,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-21 22:03:59,159 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 508 transitions, 9744 flow [2024-06-21 22:03:59,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:59,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:59,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:59,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 22:03:59,160 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:59,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:59,160 INFO L85 PathProgramCache]: Analyzing trace with hash -787014752, now seen corresponding path program 7 times [2024-06-21 22:03:59,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:59,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440617298] [2024-06-21 22:03:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:59,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:01,180 INFO 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 22:04:01,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:01,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440617298] [2024-06-21 22:04:01,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440617298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:01,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:01,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:01,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083620146] [2024-06-21 22:04:01,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:01,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:01,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:01,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:01,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:01,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:01,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 508 transitions, 9744 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:01,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:01,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:01,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:03,285 INFO L124 PetriNetUnfolderBase]: 3523/5672 cut-off events. [2024-06-21 22:04:03,285 INFO L125 PetriNetUnfolderBase]: For 541293/541293 co-relation queries the response was YES. [2024-06-21 22:04:03,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60270 conditions, 5672 events. 3523/5672 cut-off events. For 541293/541293 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 34963 event pairs, 744 based on Foata normal form. 3/5670 useless extension candidates. Maximal degree in co-relation 60133. Up to 5010 conditions per place. [2024-06-21 22:04:03,363 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 126 changer transitions 0/542 dead transitions. [2024-06-21 22:04:03,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 542 transitions, 11310 flow [2024-06-21 22:04:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:03,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:04:03,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:04:03,364 INFO L175 Difference]: Start difference. First operand has 281 places, 508 transitions, 9744 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:04:03,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 542 transitions, 11310 flow [2024-06-21 22:04:04,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 542 transitions, 11150 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-21 22:04:04,887 INFO L231 Difference]: Finished difference. Result has 287 places, 509 transitions, 9920 flow [2024-06-21 22:04:04,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9920, PETRI_PLACES=287, PETRI_TRANSITIONS=509} [2024-06-21 22:04:04,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 22:04:04,888 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 509 transitions, 9920 flow [2024-06-21 22:04:04,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:04,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:04,888 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 22:04:04,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 22:04:04,889 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:04,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash -338280382, now seen corresponding path program 8 times [2024-06-21 22:04:04,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:04,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104966832] [2024-06-21 22:04:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:08,431 INFO 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 22:04:08,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:08,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104966832] [2024-06-21 22:04:08,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104966832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:08,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:08,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:08,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288809639] [2024-06-21 22:04:08,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:08,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:08,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:08,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:08,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:08,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:08,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 509 transitions, 9920 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:08,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:08,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:08,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:10,378 INFO L124 PetriNetUnfolderBase]: 3538/5694 cut-off events. [2024-06-21 22:04:10,378 INFO L125 PetriNetUnfolderBase]: For 554366/554366 co-relation queries the response was YES. [2024-06-21 22:04:10,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61165 conditions, 5694 events. 3538/5694 cut-off events. For 554366/554366 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 35126 event pairs, 724 based on Foata normal form. 3/5692 useless extension candidates. Maximal degree in co-relation 61026. Up to 5199 conditions per place. [2024-06-21 22:04:10,458 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 464 selfloop transitions, 65 changer transitions 0/534 dead transitions. [2024-06-21 22:04:10,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 534 transitions, 11303 flow [2024-06-21 22:04:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 22:04:10,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 22:04:10,459 INFO L175 Difference]: Start difference. First operand has 287 places, 509 transitions, 9920 flow. Second operand 8 states and 137 transitions. [2024-06-21 22:04:10,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 534 transitions, 11303 flow [2024-06-21 22:04:12,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 534 transitions, 11147 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 22:04:12,075 INFO L231 Difference]: Finished difference. Result has 292 places, 513 transitions, 9992 flow [2024-06-21 22:04:12,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9764, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9992, PETRI_PLACES=292, PETRI_TRANSITIONS=513} [2024-06-21 22:04:12,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 22:04:12,076 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 513 transitions, 9992 flow [2024-06-21 22:04:12,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:12,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:12,077 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 22:04:12,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 22:04:12,077 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:12,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:12,077 INFO L85 PathProgramCache]: Analyzing trace with hash -338547292, now seen corresponding path program 9 times [2024-06-21 22:04:12,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:12,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924308256] [2024-06-21 22:04:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:12,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:15,236 INFO 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 22:04:15,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:15,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924308256] [2024-06-21 22:04:15,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924308256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:15,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:15,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:15,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054290852] [2024-06-21 22:04:15,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:15,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:15,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:15,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:15,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:15,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:15,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 513 transitions, 9992 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:15,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:15,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:15,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:17,047 INFO L124 PetriNetUnfolderBase]: 3525/5678 cut-off events. [2024-06-21 22:04:17,048 INFO L125 PetriNetUnfolderBase]: For 558572/558572 co-relation queries the response was YES. [2024-06-21 22:04:17,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60792 conditions, 5678 events. 3525/5678 cut-off events. For 558572/558572 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 35064 event pairs, 726 based on Foata normal form. 3/5676 useless extension candidates. Maximal degree in co-relation 60652. Up to 5267 conditions per place. [2024-06-21 22:04:17,130 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 480 selfloop transitions, 47 changer transitions 0/532 dead transitions. [2024-06-21 22:04:17,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 532 transitions, 11138 flow [2024-06-21 22:04:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 22:04:17,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 22:04:17,132 INFO L175 Difference]: Start difference. First operand has 292 places, 513 transitions, 9992 flow. Second operand 8 states and 134 transitions. [2024-06-21 22:04:17,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 532 transitions, 11138 flow [2024-06-21 22:04:18,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 532 transitions, 10912 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:18,776 INFO L231 Difference]: Finished difference. Result has 294 places, 513 transitions, 9867 flow [2024-06-21 22:04:18,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9766, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9867, PETRI_PLACES=294, PETRI_TRANSITIONS=513} [2024-06-21 22:04:18,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 22:04:18,777 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 513 transitions, 9867 flow [2024-06-21 22:04:18,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:18,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:18,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:18,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 22:04:18,778 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:18,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:18,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1107521032, now seen corresponding path program 10 times [2024-06-21 22:04:18,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:18,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517409294] [2024-06-21 22:04:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:18,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:21,291 INFO 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 22:04:21,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:21,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517409294] [2024-06-21 22:04:21,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517409294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:21,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:21,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:21,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604343200] [2024-06-21 22:04:21,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:21,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:21,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:21,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:21,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 513 transitions, 9867 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:21,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:21,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:21,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:23,232 INFO L124 PetriNetUnfolderBase]: 3541/5684 cut-off events. [2024-06-21 22:04:23,232 INFO L125 PetriNetUnfolderBase]: For 574539/574539 co-relation queries the response was YES. [2024-06-21 22:04:23,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60773 conditions, 5684 events. 3541/5684 cut-off events. For 574539/574539 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 34987 event pairs, 703 based on Foata normal form. 8/5682 useless extension candidates. Maximal degree in co-relation 60632. Up to 5079 conditions per place. [2024-06-21 22:04:23,314 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 392 selfloop transitions, 144 changer transitions 0/541 dead transitions. [2024-06-21 22:04:23,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 541 transitions, 11496 flow [2024-06-21 22:04:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:04:23,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:04:23,315 INFO L175 Difference]: Start difference. First operand has 294 places, 513 transitions, 9867 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:04:23,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 541 transitions, 11496 flow [2024-06-21 22:04:25,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 541 transitions, 11362 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:25,085 INFO L231 Difference]: Finished difference. Result has 295 places, 523 transitions, 10358 flow [2024-06-21 22:04:25,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9733, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10358, PETRI_PLACES=295, PETRI_TRANSITIONS=523} [2024-06-21 22:04:25,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 22:04:25,096 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 523 transitions, 10358 flow [2024-06-21 22:04:25,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:25,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:25,096 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 22:04:25,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 22:04:25,096 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:25,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1421263968, now seen corresponding path program 11 times [2024-06-21 22:04:25,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:25,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79501955] [2024-06-21 22:04:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:25,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:27,256 INFO 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 22:04:27,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:27,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79501955] [2024-06-21 22:04:27,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79501955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:27,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:27,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:27,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324532817] [2024-06-21 22:04:27,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:27,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:27,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:27,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:27,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:27,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 523 transitions, 10358 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:27,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:27,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:27,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:29,331 INFO L124 PetriNetUnfolderBase]: 3610/5780 cut-off events. [2024-06-21 22:04:29,332 INFO L125 PetriNetUnfolderBase]: For 590314/590314 co-relation queries the response was YES. [2024-06-21 22:04:29,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62882 conditions, 5780 events. 3610/5780 cut-off events. For 590314/590314 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35533 event pairs, 707 based on Foata normal form. 4/5774 useless extension candidates. Maximal degree in co-relation 62741. Up to 5094 conditions per place. [2024-06-21 22:04:29,404 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 388 selfloop transitions, 175 changer transitions 0/568 dead transitions. [2024-06-21 22:04:29,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 568 transitions, 12520 flow [2024-06-21 22:04:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:29,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 22:04:29,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 22:04:29,405 INFO L175 Difference]: Start difference. First operand has 295 places, 523 transitions, 10358 flow. Second operand 9 states and 150 transitions. [2024-06-21 22:04:29,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 568 transitions, 12520 flow [2024-06-21 22:04:31,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 568 transitions, 11950 flow, removed 182 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:31,124 INFO L231 Difference]: Finished difference. Result has 302 places, 549 transitions, 11021 flow [2024-06-21 22:04:31,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9825, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11021, PETRI_PLACES=302, PETRI_TRANSITIONS=549} [2024-06-21 22:04:31,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-21 22:04:31,125 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 549 transitions, 11021 flow [2024-06-21 22:04:31,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:31,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:31,125 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 22:04:31,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 22:04:31,126 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:31,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:31,126 INFO L85 PathProgramCache]: Analyzing trace with hash -426295900, now seen corresponding path program 12 times [2024-06-21 22:04:31,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:31,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323604860] [2024-06-21 22:04:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:31,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:33,612 INFO 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 22:04:33,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:33,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323604860] [2024-06-21 22:04:33,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323604860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:33,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:33,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:33,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544327593] [2024-06-21 22:04:33,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:33,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:33,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:33,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:33,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 549 transitions, 11021 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:33,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:33,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:33,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:35,597 INFO L124 PetriNetUnfolderBase]: 3583/5743 cut-off events. [2024-06-21 22:04:35,598 INFO L125 PetriNetUnfolderBase]: For 601147/601147 co-relation queries the response was YES. [2024-06-21 22:04:35,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62530 conditions, 5743 events. 3583/5743 cut-off events. For 601147/601147 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35302 event pairs, 706 based on Foata normal form. 9/5742 useless extension candidates. Maximal degree in co-relation 62385. Up to 5308 conditions per place. [2024-06-21 22:04:35,686 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 489 selfloop transitions, 73 changer transitions 0/567 dead transitions. [2024-06-21 22:04:35,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 567 transitions, 12316 flow [2024-06-21 22:04:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 22:04:35,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 22:04:35,688 INFO L175 Difference]: Start difference. First operand has 302 places, 549 transitions, 11021 flow. Second operand 9 states and 143 transitions. [2024-06-21 22:04:35,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 567 transitions, 12316 flow [2024-06-21 22:04:38,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 567 transitions, 12061 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:38,025 INFO L231 Difference]: Finished difference. Result has 306 places, 552 transitions, 11036 flow [2024-06-21 22:04:38,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10766, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11036, PETRI_PLACES=306, PETRI_TRANSITIONS=552} [2024-06-21 22:04:38,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 22:04:38,026 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 552 transitions, 11036 flow [2024-06-21 22:04:38,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:38,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:38,026 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 22:04:38,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 22:04:38,026 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:38,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:38,027 INFO L85 PathProgramCache]: Analyzing trace with hash -12298309, now seen corresponding path program 1 times [2024-06-21 22:04:38,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:38,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935621848] [2024-06-21 22:04:38,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:38,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:40,436 INFO 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 22:04:40,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:40,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935621848] [2024-06-21 22:04:40,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935621848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:40,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:40,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:40,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109421382] [2024-06-21 22:04:40,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:40,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:40,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:40,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:40,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 552 transitions, 11036 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 22:04:40,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:40,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:40,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:42,488 INFO L124 PetriNetUnfolderBase]: 3670/5878 cut-off events. [2024-06-21 22:04:42,488 INFO L125 PetriNetUnfolderBase]: For 641525/641525 co-relation queries the response was YES. [2024-06-21 22:04:42,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64303 conditions, 5878 events. 3670/5878 cut-off events. For 641525/641525 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 36210 event pairs, 711 based on Foata normal form. 8/5876 useless extension candidates. Maximal degree in co-relation 64157. Up to 5285 conditions per place. [2024-06-21 22:04:42,576 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 510 selfloop transitions, 62 changer transitions 0/577 dead transitions. [2024-06-21 22:04:42,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 577 transitions, 12652 flow [2024-06-21 22:04:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 22:04:42,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 22:04:42,578 INFO L175 Difference]: Start difference. First operand has 306 places, 552 transitions, 11036 flow. Second operand 8 states and 133 transitions. [2024-06-21 22:04:42,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 577 transitions, 12652 flow [2024-06-21 22:04:44,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 577 transitions, 12356 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:45,007 INFO L231 Difference]: Finished difference. Result has 309 places, 554 transitions, 10928 flow [2024-06-21 22:04:45,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10740, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10928, PETRI_PLACES=309, PETRI_TRANSITIONS=554} [2024-06-21 22:04:45,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 22:04:45,008 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 554 transitions, 10928 flow [2024-06-21 22:04:45,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 22:04:45,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:45,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:45,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 22:04:45,009 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:45,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash -26583109, now seen corresponding path program 2 times [2024-06-21 22:04:45,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:45,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229702554] [2024-06-21 22:04:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:45,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:47,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:47,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229702554] [2024-06-21 22:04:47,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229702554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:47,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:47,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:47,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206510592] [2024-06-21 22:04:47,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:47,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:47,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:47,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:47,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:47,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:47,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 554 transitions, 10928 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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 22:04:47,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:47,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:47,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:49,934 INFO L124 PetriNetUnfolderBase]: 3696/5922 cut-off events. [2024-06-21 22:04:49,934 INFO L125 PetriNetUnfolderBase]: For 660416/660416 co-relation queries the response was YES. [2024-06-21 22:04:49,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64126 conditions, 5922 events. 3696/5922 cut-off events. For 660416/660416 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36492 event pairs, 735 based on Foata normal form. 14/5926 useless extension candidates. Maximal degree in co-relation 63979. Up to 5460 conditions per place. [2024-06-21 22:04:50,024 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 507 selfloop transitions, 62 changer transitions 0/574 dead transitions. [2024-06-21 22:04:50,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 574 transitions, 12292 flow [2024-06-21 22:04:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 22:04:50,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 22:04:50,026 INFO L175 Difference]: Start difference. First operand has 309 places, 554 transitions, 10928 flow. Second operand 7 states and 121 transitions. [2024-06-21 22:04:50,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 574 transitions, 12292 flow [2024-06-21 22:04:52,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 574 transitions, 12212 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 22:04:52,779 INFO L231 Difference]: Finished difference. Result has 312 places, 556 transitions, 11049 flow [2024-06-21 22:04:52,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10848, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11049, PETRI_PLACES=312, PETRI_TRANSITIONS=556} [2024-06-21 22:04:52,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 22:04:52,780 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 556 transitions, 11049 flow [2024-06-21 22:04:52,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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 22:04:52,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:52,780 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 22:04:52,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 22:04:52,781 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:52,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:52,781 INFO L85 PathProgramCache]: Analyzing trace with hash -788878689, now seen corresponding path program 1 times [2024-06-21 22:04:52,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:52,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721436409] [2024-06-21 22:04:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:52,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:55,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:55,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721436409] [2024-06-21 22:04:55,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721436409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:55,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:55,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:55,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982136085] [2024-06-21 22:04:55,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:55,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:55,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:55,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:55,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:55,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:04:55,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 556 transitions, 11049 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:55,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:55,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:04:55,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:58,020 INFO L124 PetriNetUnfolderBase]: 3952/6340 cut-off events. [2024-06-21 22:04:58,020 INFO L125 PetriNetUnfolderBase]: For 784244/784244 co-relation queries the response was YES. [2024-06-21 22:04:58,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71211 conditions, 6340 events. 3952/6340 cut-off events. For 784244/784244 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 39749 event pairs, 737 based on Foata normal form. 16/6351 useless extension candidates. Maximal degree in co-relation 71062. Up to 5085 conditions per place. [2024-06-21 22:04:58,119 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 472 selfloop transitions, 139 changer transitions 0/616 dead transitions. [2024-06-21 22:04:58,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 616 transitions, 13553 flow [2024-06-21 22:04:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 22:04:58,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 22:04:58,120 INFO L175 Difference]: Start difference. First operand has 312 places, 556 transitions, 11049 flow. Second operand 9 states and 172 transitions. [2024-06-21 22:04:58,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 616 transitions, 13553 flow [2024-06-21 22:05:00,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 616 transitions, 13417 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:00,692 INFO L231 Difference]: Finished difference. Result has 319 places, 563 transitions, 11489 flow [2024-06-21 22:05:00,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10913, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11489, PETRI_PLACES=319, PETRI_TRANSITIONS=563} [2024-06-21 22:05:00,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-21 22:05:00,693 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 563 transitions, 11489 flow [2024-06-21 22:05:00,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:00,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:00,693 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 22:05:00,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 22:05:00,694 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:00,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:00,694 INFO L85 PathProgramCache]: Analyzing trace with hash -787004739, now seen corresponding path program 2 times [2024-06-21 22:05:00,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:00,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378420546] [2024-06-21 22:05:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:00,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:03,248 INFO 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 22:05:03,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:03,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378420546] [2024-06-21 22:05:03,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378420546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:03,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:03,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:03,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85998098] [2024-06-21 22:05:03,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:03,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:03,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:03,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:03,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:03,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:03,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 563 transitions, 11489 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:03,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:03,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:03,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:05,725 INFO L124 PetriNetUnfolderBase]: 4149/6639 cut-off events. [2024-06-21 22:05:05,725 INFO L125 PetriNetUnfolderBase]: For 889835/889835 co-relation queries the response was YES. [2024-06-21 22:05:05,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77300 conditions, 6639 events. 4149/6639 cut-off events. For 889835/889835 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41927 event pairs, 893 based on Foata normal form. 16/6650 useless extension candidates. Maximal degree in co-relation 77148. Up to 5699 conditions per place. [2024-06-21 22:05:05,826 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 473 selfloop transitions, 133 changer transitions 0/611 dead transitions. [2024-06-21 22:05:05,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 611 transitions, 13688 flow [2024-06-21 22:05:05,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:05:05,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:05:05,828 INFO L175 Difference]: Start difference. First operand has 319 places, 563 transitions, 11489 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:05:05,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 611 transitions, 13688 flow [2024-06-21 22:05:08,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 611 transitions, 13452 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:08,616 INFO L231 Difference]: Finished difference. Result has 325 places, 567 transitions, 11703 flow [2024-06-21 22:05:08,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11257, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11703, PETRI_PLACES=325, PETRI_TRANSITIONS=567} [2024-06-21 22:05:08,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 22:05:08,617 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 567 transitions, 11703 flow [2024-06-21 22:05:08,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:08,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:08,617 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 22:05:08,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 22:05:08,617 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:08,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash -787001019, now seen corresponding path program 3 times [2024-06-21 22:05:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:08,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525246292] [2024-06-21 22:05:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:11,124 INFO 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 22:05:11,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:11,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525246292] [2024-06-21 22:05:11,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525246292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:11,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:11,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:11,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418176503] [2024-06-21 22:05:11,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:11,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:11,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:11,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:11,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:11,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:11,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 567 transitions, 11703 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:11,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:11,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:11,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:13,677 INFO L124 PetriNetUnfolderBase]: 4162/6672 cut-off events. [2024-06-21 22:05:13,679 INFO L125 PetriNetUnfolderBase]: For 884954/884954 co-relation queries the response was YES. [2024-06-21 22:05:13,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77060 conditions, 6672 events. 4162/6672 cut-off events. For 884954/884954 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 42149 event pairs, 912 based on Foata normal form. 20/6687 useless extension candidates. Maximal degree in co-relation 76905. Up to 5921 conditions per place. [2024-06-21 22:05:13,785 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 467 selfloop transitions, 136 changer transitions 0/608 dead transitions. [2024-06-21 22:05:13,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 608 transitions, 13594 flow [2024-06-21 22:05:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:05:13,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:05:13,787 INFO L175 Difference]: Start difference. First operand has 325 places, 567 transitions, 11703 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:05:13,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 608 transitions, 13594 flow [2024-06-21 22:05:17,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 608 transitions, 13423 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:17,213 INFO L231 Difference]: Finished difference. Result has 331 places, 570 transitions, 11936 flow [2024-06-21 22:05:17,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11532, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11936, PETRI_PLACES=331, PETRI_TRANSITIONS=570} [2024-06-21 22:05:17,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-21 22:05:17,214 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 570 transitions, 11936 flow [2024-06-21 22:05:17,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:17,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:17,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:17,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 22:05:17,214 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:17,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:17,215 INFO L85 PathProgramCache]: Analyzing trace with hash -700165059, now seen corresponding path program 4 times [2024-06-21 22:05:17,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:17,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383778299] [2024-06-21 22:05:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:17,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:20,249 INFO 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 22:05:20,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:20,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383778299] [2024-06-21 22:05:20,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383778299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:20,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:20,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:20,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191563937] [2024-06-21 22:05:20,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:20,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:20,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:20,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:20,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 570 transitions, 11936 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:20,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:20,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:20,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:22,764 INFO L124 PetriNetUnfolderBase]: 4377/7023 cut-off events. [2024-06-21 22:05:22,764 INFO L125 PetriNetUnfolderBase]: For 1057816/1057816 co-relation queries the response was YES. [2024-06-21 22:05:22,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80687 conditions, 7023 events. 4377/7023 cut-off events. For 1057816/1057816 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 44588 event pairs, 941 based on Foata normal form. 68/7086 useless extension candidates. Maximal degree in co-relation 80529. Up to 6227 conditions per place. [2024-06-21 22:05:22,885 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 541 selfloop transitions, 50 changer transitions 4/600 dead transitions. [2024-06-21 22:05:22,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 600 transitions, 13474 flow [2024-06-21 22:05:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 22:05:22,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 22:05:22,887 INFO L175 Difference]: Start difference. First operand has 331 places, 570 transitions, 11936 flow. Second operand 9 states and 155 transitions. [2024-06-21 22:05:22,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 600 transitions, 13474 flow [2024-06-21 22:05:26,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 600 transitions, 13183 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:26,340 INFO L231 Difference]: Finished difference. Result has 335 places, 570 transitions, 11825 flow [2024-06-21 22:05:26,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11645, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11825, PETRI_PLACES=335, PETRI_TRANSITIONS=570} [2024-06-21 22:05:26,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 22:05:26,341 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 570 transitions, 11825 flow [2024-06-21 22:05:26,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:26,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:26,342 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 22:05:26,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 22:05:26,342 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:26,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:26,343 INFO L85 PathProgramCache]: Analyzing trace with hash -124971969, now seen corresponding path program 5 times [2024-06-21 22:05:26,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:26,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547331545] [2024-06-21 22:05:26,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:26,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:31,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:31,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547331545] [2024-06-21 22:05:31,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547331545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:31,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:31,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:31,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156403606] [2024-06-21 22:05:31,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:31,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:31,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:31,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:31,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:31,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:31,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 570 transitions, 11825 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:31,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:31,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:31,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:34,639 INFO L124 PetriNetUnfolderBase]: 4537/7279 cut-off events. [2024-06-21 22:05:34,639 INFO L125 PetriNetUnfolderBase]: For 1077414/1077414 co-relation queries the response was YES. [2024-06-21 22:05:34,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82715 conditions, 7279 events. 4537/7279 cut-off events. For 1077414/1077414 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 46398 event pairs, 990 based on Foata normal form. 68/7337 useless extension candidates. Maximal degree in co-relation 82556. Up to 5815 conditions per place. [2024-06-21 22:05:34,740 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 431 selfloop transitions, 154 changer transitions 13/603 dead transitions. [2024-06-21 22:05:34,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 603 transitions, 13403 flow [2024-06-21 22:05:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 22:05:34,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 22:05:34,742 INFO L175 Difference]: Start difference. First operand has 335 places, 570 transitions, 11825 flow. Second operand 10 states and 179 transitions. [2024-06-21 22:05:34,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 603 transitions, 13403 flow [2024-06-21 22:05:38,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 603 transitions, 13186 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 22:05:38,098 INFO L231 Difference]: Finished difference. Result has 340 places, 561 transitions, 11942 flow [2024-06-21 22:05:38,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11608, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11942, PETRI_PLACES=340, PETRI_TRANSITIONS=561} [2024-06-21 22:05:38,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-21 22:05:38,099 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 561 transitions, 11942 flow [2024-06-21 22:05:38,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:38,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:38,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:38,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 22:05:38,100 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:38,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash -124975689, now seen corresponding path program 6 times [2024-06-21 22:05:38,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:38,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414623519] [2024-06-21 22:05:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:38,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:42,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:42,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414623519] [2024-06-21 22:05:42,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414623519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:42,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:42,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:42,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450716989] [2024-06-21 22:05:42,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:42,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:42,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:42,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:42,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:42,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:42,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 561 transitions, 11942 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:42,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:42,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:42,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:45,059 INFO L124 PetriNetUnfolderBase]: 4747/7671 cut-off events. [2024-06-21 22:05:45,059 INFO L125 PetriNetUnfolderBase]: For 1151194/1151194 co-relation queries the response was YES. [2024-06-21 22:05:45,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88022 conditions, 7671 events. 4747/7671 cut-off events. For 1151194/1151194 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 49569 event pairs, 1006 based on Foata normal form. 56/7722 useless extension candidates. Maximal degree in co-relation 87860. Up to 5982 conditions per place. [2024-06-21 22:05:45,181 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 531 selfloop transitions, 65 changer transitions 1/602 dead transitions. [2024-06-21 22:05:45,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 602 transitions, 13897 flow [2024-06-21 22:05:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:05:45,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:05:45,183 INFO L175 Difference]: Start difference. First operand has 340 places, 561 transitions, 11942 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:05:45,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 602 transitions, 13897 flow [2024-06-21 22:05:48,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 602 transitions, 13467 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-06-21 22:05:48,700 INFO L231 Difference]: Finished difference. Result has 339 places, 565 transitions, 11860 flow [2024-06-21 22:05:48,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11525, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11860, PETRI_PLACES=339, PETRI_TRANSITIONS=565} [2024-06-21 22:05:48,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-21 22:05:48,701 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 565 transitions, 11860 flow [2024-06-21 22:05:48,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:48,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:48,701 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 22:05:48,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 22:05:48,701 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:48,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:48,702 INFO L85 PathProgramCache]: Analyzing trace with hash -12558492, now seen corresponding path program 1 times [2024-06-21 22:05:48,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:48,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119429958] [2024-06-21 22:05:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:48,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:51,321 INFO 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 22:05:51,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:51,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119429958] [2024-06-21 22:05:51,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119429958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:51,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:51,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:51,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079226117] [2024-06-21 22:05:51,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:51,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:51,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:51,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:51,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:51,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:51,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 565 transitions, 11860 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:51,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:51,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:51,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:54,139 INFO L124 PetriNetUnfolderBase]: 4744/7632 cut-off events. [2024-06-21 22:05:54,140 INFO L125 PetriNetUnfolderBase]: For 955668/955668 co-relation queries the response was YES. [2024-06-21 22:05:54,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86933 conditions, 7632 events. 4744/7632 cut-off events. For 955668/955668 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 49099 event pairs, 1209 based on Foata normal form. 3/7625 useless extension candidates. Maximal degree in co-relation 86770. Up to 7165 conditions per place. [2024-06-21 22:05:54,267 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 486 selfloop transitions, 93 changer transitions 0/584 dead transitions. [2024-06-21 22:05:54,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 584 transitions, 13191 flow [2024-06-21 22:05:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 22:05:54,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-21 22:05:54,269 INFO L175 Difference]: Start difference. First operand has 339 places, 565 transitions, 11860 flow. Second operand 10 states and 159 transitions. [2024-06-21 22:05:54,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 584 transitions, 13191 flow [2024-06-21 22:05:57,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 584 transitions, 13042 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:57,261 INFO L231 Difference]: Finished difference. Result has 345 places, 569 transitions, 12071 flow [2024-06-21 22:05:57,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11711, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12071, PETRI_PLACES=345, PETRI_TRANSITIONS=569} [2024-06-21 22:05:57,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 22:05:57,261 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 569 transitions, 12071 flow [2024-06-21 22:05:57,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:57,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:57,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:57,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 22:05:57,262 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:57,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash -19915877, now seen corresponding path program 7 times [2024-06-21 22:05:57,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:57,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629132100] [2024-06-21 22:05:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:59,803 INFO 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 22:05:59,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:59,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629132100] [2024-06-21 22:05:59,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629132100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:59,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:59,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:59,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575569963] [2024-06-21 22:05:59,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:59,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:59,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:59,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:59,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:59,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:05:59,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 569 transitions, 12071 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:59,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:59,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:05:59,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:02,768 INFO L124 PetriNetUnfolderBase]: 4920/7910 cut-off events. [2024-06-21 22:06:02,769 INFO L125 PetriNetUnfolderBase]: For 1144840/1144840 co-relation queries the response was YES. [2024-06-21 22:06:02,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89463 conditions, 7910 events. 4920/7910 cut-off events. For 1144840/1144840 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 51134 event pairs, 1259 based on Foata normal form. 54/7954 useless extension candidates. Maximal degree in co-relation 89297. Up to 7169 conditions per place. [2024-06-21 22:06:02,905 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 492 selfloop transitions, 86 changer transitions 11/594 dead transitions. [2024-06-21 22:06:02,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 594 transitions, 13528 flow [2024-06-21 22:06:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:06:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:06:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-21 22:06:02,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-21 22:06:02,907 INFO L175 Difference]: Start difference. First operand has 345 places, 569 transitions, 12071 flow. Second operand 11 states and 177 transitions. [2024-06-21 22:06:02,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 594 transitions, 13528 flow [2024-06-21 22:06:06,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 594 transitions, 13189 flow, removed 99 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:06,469 INFO L231 Difference]: Finished difference. Result has 350 places, 562 transitions, 11817 flow [2024-06-21 22:06:06,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11732, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11817, PETRI_PLACES=350, PETRI_TRANSITIONS=562} [2024-06-21 22:06:06,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-21 22:06:06,470 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 562 transitions, 11817 flow [2024-06-21 22:06:06,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:06,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:06,470 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 22:06:06,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 22:06:06,470 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:06,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:06,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1415737753, now seen corresponding path program 1 times [2024-06-21 22:06:06,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:06,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022144579] [2024-06-21 22:06:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:06,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:09,338 INFO 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 22:06:09,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:09,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022144579] [2024-06-21 22:06:09,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022144579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:09,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:09,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:09,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225560439] [2024-06-21 22:06:09,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:09,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:09,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:09,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:09,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:09,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 562 transitions, 11817 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:09,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:09,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:09,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:12,603 INFO L124 PetriNetUnfolderBase]: 4811/7753 cut-off events. [2024-06-21 22:06:12,604 INFO L125 PetriNetUnfolderBase]: For 1017418/1017418 co-relation queries the response was YES. [2024-06-21 22:06:12,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87542 conditions, 7753 events. 4811/7753 cut-off events. For 1017418/1017418 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 50159 event pairs, 1205 based on Foata normal form. 18/7769 useless extension candidates. Maximal degree in co-relation 87375. Up to 7249 conditions per place. [2024-06-21 22:06:12,721 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 524 selfloop transitions, 67 changer transitions 0/596 dead transitions. [2024-06-21 22:06:12,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 596 transitions, 13350 flow [2024-06-21 22:06:12,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:06:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:06:12,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 22:06:12,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 22:06:12,723 INFO L175 Difference]: Start difference. First operand has 350 places, 562 transitions, 11817 flow. Second operand 11 states and 176 transitions. [2024-06-21 22:06:12,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 596 transitions, 13350 flow [2024-06-21 22:06:16,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 596 transitions, 13057 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 22:06:16,459 INFO L231 Difference]: Finished difference. Result has 352 places, 567 transitions, 11848 flow [2024-06-21 22:06:16,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11530, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11848, PETRI_PLACES=352, PETRI_TRANSITIONS=567} [2024-06-21 22:06:16,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-21 22:06:16,460 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 567 transitions, 11848 flow [2024-06-21 22:06:16,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:16,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:16,460 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 22:06:16,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 22:06:16,460 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:16,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:16,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1421253955, now seen corresponding path program 8 times [2024-06-21 22:06:16,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:16,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366991724] [2024-06-21 22:06:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:16,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:19,031 INFO 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 22:06:19,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:19,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366991724] [2024-06-21 22:06:19,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366991724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:19,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:19,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:19,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850593255] [2024-06-21 22:06:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:19,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:19,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:19,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 567 transitions, 11848 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:19,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:19,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:19,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:22,296 INFO L124 PetriNetUnfolderBase]: 5354/8619 cut-off events. [2024-06-21 22:06:22,296 INFO L125 PetriNetUnfolderBase]: For 1375899/1375899 co-relation queries the response was YES. [2024-06-21 22:06:22,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100227 conditions, 8619 events. 5354/8619 cut-off events. For 1375899/1375899 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 56472 event pairs, 1161 based on Foata normal form. 48/8657 useless extension candidates. Maximal degree in co-relation 100059. Up to 6075 conditions per place. [2024-06-21 22:06:22,427 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 354 selfloop transitions, 282 changer transitions 0/641 dead transitions. [2024-06-21 22:06:22,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 641 transitions, 15088 flow [2024-06-21 22:06:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:22,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:22,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 22:06:22,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 22:06:22,429 INFO L175 Difference]: Start difference. First operand has 352 places, 567 transitions, 11848 flow. Second operand 10 states and 185 transitions. [2024-06-21 22:06:22,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 641 transitions, 15088 flow [2024-06-21 22:06:26,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 641 transitions, 14889 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 22:06:26,294 INFO L231 Difference]: Finished difference. Result has 358 places, 597 transitions, 13327 flow [2024-06-21 22:06:26,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11672, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13327, PETRI_PLACES=358, PETRI_TRANSITIONS=597} [2024-06-21 22:06:26,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-21 22:06:26,295 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 597 transitions, 13327 flow [2024-06-21 22:06:26,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:26,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:26,295 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 22:06:26,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 22:06:26,295 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:26,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:26,296 INFO L85 PathProgramCache]: Analyzing trace with hash -12558275, now seen corresponding path program 2 times [2024-06-21 22:06:26,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:26,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389439990] [2024-06-21 22:06:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:26,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:29,087 INFO 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 22:06:29,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:29,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389439990] [2024-06-21 22:06:29,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389439990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:29,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:29,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:29,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813519063] [2024-06-21 22:06:29,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:29,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:29,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:29,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:29,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:29,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:29,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 597 transitions, 13327 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:29,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:29,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:29,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:32,375 INFO L124 PetriNetUnfolderBase]: 5409/8704 cut-off events. [2024-06-21 22:06:32,375 INFO L125 PetriNetUnfolderBase]: For 1311392/1311392 co-relation queries the response was YES. [2024-06-21 22:06:32,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104312 conditions, 8704 events. 5409/8704 cut-off events. For 1311392/1311392 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 56954 event pairs, 1474 based on Foata normal form. 18/8712 useless extension candidates. Maximal degree in co-relation 104140. Up to 8051 conditions per place. [2024-06-21 22:06:32,516 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 521 selfloop transitions, 98 changer transitions 0/624 dead transitions. [2024-06-21 22:06:32,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 624 transitions, 14999 flow [2024-06-21 22:06:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:06:32,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:06:32,517 INFO L175 Difference]: Start difference. First operand has 358 places, 597 transitions, 13327 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:06:32,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 624 transitions, 14999 flow [2024-06-21 22:06:37,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 624 transitions, 14374 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 22:06:37,683 INFO L231 Difference]: Finished difference. Result has 359 places, 601 transitions, 13108 flow [2024-06-21 22:06:37,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12706, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13108, PETRI_PLACES=359, PETRI_TRANSITIONS=601} [2024-06-21 22:06:37,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 22:06:37,684 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 601 transitions, 13108 flow [2024-06-21 22:06:37,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:37,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:37,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:37,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 22:06:37,684 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:37,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash -12291365, now seen corresponding path program 3 times [2024-06-21 22:06:37,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:37,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584822211] [2024-06-21 22:06:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:37,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:40,381 INFO 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 22:06:40,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:40,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584822211] [2024-06-21 22:06:40,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584822211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:40,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:40,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:40,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554248371] [2024-06-21 22:06:40,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:40,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:40,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:40,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:40,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:40,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 601 transitions, 13108 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:40,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:40,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:40,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:43,717 INFO L124 PetriNetUnfolderBase]: 5504/8869 cut-off events. [2024-06-21 22:06:43,717 INFO L125 PetriNetUnfolderBase]: For 1327754/1327754 co-relation queries the response was YES. [2024-06-21 22:06:43,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104501 conditions, 8869 events. 5504/8869 cut-off events. For 1327754/1327754 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 58428 event pairs, 1463 based on Foata normal form. 22/8881 useless extension candidates. Maximal degree in co-relation 104330. Up to 8272 conditions per place. [2024-06-21 22:06:43,863 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 553 selfloop transitions, 72 changer transitions 0/630 dead transitions. [2024-06-21 22:06:43,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 630 transitions, 14820 flow [2024-06-21 22:06:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:06:43,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 22:06:43,865 INFO L175 Difference]: Start difference. First operand has 359 places, 601 transitions, 13108 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:06:43,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 630 transitions, 14820 flow [2024-06-21 22:06:48,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 630 transitions, 14535 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:48,666 INFO L231 Difference]: Finished difference. Result has 362 places, 606 transitions, 13157 flow [2024-06-21 22:06:48,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12823, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13157, PETRI_PLACES=362, PETRI_TRANSITIONS=606} [2024-06-21 22:06:48,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-21 22:06:48,667 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 606 transitions, 13157 flow [2024-06-21 22:06:48,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:48,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:48,667 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 22:06:48,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 22:06:48,668 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:48,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:48,668 INFO L85 PathProgramCache]: Analyzing trace with hash -219361817, now seen corresponding path program 9 times [2024-06-21 22:06:48,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:48,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818321966] [2024-06-21 22:06:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:48,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:51,124 INFO 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 22:06:51,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:51,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818321966] [2024-06-21 22:06:51,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818321966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:51,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:51,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:51,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245163439] [2024-06-21 22:06:51,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:51,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:51,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:51,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:51,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:51,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:06:51,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 606 transitions, 13157 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:51,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:51,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:06:51,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:54,905 INFO L124 PetriNetUnfolderBase]: 5680/9151 cut-off events. [2024-06-21 22:06:54,906 INFO L125 PetriNetUnfolderBase]: For 1494592/1494592 co-relation queries the response was YES. [2024-06-21 22:06:55,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107989 conditions, 9151 events. 5680/9151 cut-off events. For 1494592/1494592 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 60531 event pairs, 1531 based on Foata normal form. 54/9195 useless extension candidates. Maximal degree in co-relation 107816. Up to 8183 conditions per place. [2024-06-21 22:06:55,179 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 451 selfloop transitions, 172 changer transitions 7/635 dead transitions. [2024-06-21 22:06:55,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 635 transitions, 15105 flow [2024-06-21 22:06:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 22:06:55,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 22:06:55,180 INFO L175 Difference]: Start difference. First operand has 362 places, 606 transitions, 13157 flow. Second operand 10 states and 169 transitions. [2024-06-21 22:06:55,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 635 transitions, 15105 flow [2024-06-21 22:06:59,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 635 transitions, 14861 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:59,880 INFO L231 Difference]: Finished difference. Result has 368 places, 605 transitions, 13398 flow [2024-06-21 22:06:59,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12913, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13398, PETRI_PLACES=368, PETRI_TRANSITIONS=605} [2024-06-21 22:06:59,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-21 22:06:59,881 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 605 transitions, 13398 flow [2024-06-21 22:06:59,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:59,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:59,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:59,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 22:06:59,882 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:59,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:59,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1421106085, now seen corresponding path program 10 times [2024-06-21 22:06:59,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:59,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314658145] [2024-06-21 22:06:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:59,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:02,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:02,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314658145] [2024-06-21 22:07:02,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314658145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:02,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:02,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:02,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983769257] [2024-06-21 22:07:02,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:02,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:02,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:02,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:02,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:02,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:02,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 605 transitions, 13398 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:02,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:02,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:02,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:06,322 INFO L124 PetriNetUnfolderBase]: 5679/9162 cut-off events. [2024-06-21 22:07:06,323 INFO L125 PetriNetUnfolderBase]: For 1489029/1489029 co-relation queries the response was YES. [2024-06-21 22:07:06,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107490 conditions, 9162 events. 5679/9162 cut-off events. For 1489029/1489029 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 60762 event pairs, 1513 based on Foata normal form. 54/9206 useless extension candidates. Maximal degree in co-relation 107315. Up to 8304 conditions per place. [2024-06-21 22:07:06,467 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 478 selfloop transitions, 139 changer transitions 8/630 dead transitions. [2024-06-21 22:07:06,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 630 transitions, 15139 flow [2024-06-21 22:07:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 22:07:06,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 22:07:06,471 INFO L175 Difference]: Start difference. First operand has 368 places, 605 transitions, 13398 flow. Second operand 9 states and 154 transitions. [2024-06-21 22:07:06,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 630 transitions, 15139 flow [2024-06-21 22:07:11,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 630 transitions, 14808 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:11,189 INFO L231 Difference]: Finished difference. Result has 371 places, 601 transitions, 13310 flow [2024-06-21 22:07:11,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13067, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13310, PETRI_PLACES=371, PETRI_TRANSITIONS=601} [2024-06-21 22:07:11,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 22:07:11,190 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 601 transitions, 13310 flow [2024-06-21 22:07:11,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:11,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:11,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:11,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 22:07:11,191 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:11,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:11,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1107951777, now seen corresponding path program 4 times [2024-06-21 22:07:11,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:11,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967041100] [2024-06-21 22:07:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:11,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:13,751 INFO 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 22:07:13,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:13,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967041100] [2024-06-21 22:07:13,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967041100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:13,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:13,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:13,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861594791] [2024-06-21 22:07:13,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:13,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:13,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:13,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:13,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:13,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:13,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 601 transitions, 13310 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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 22:07:13,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:13,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:13,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:17,397 INFO L124 PetriNetUnfolderBase]: 5638/9103 cut-off events. [2024-06-21 22:07:17,397 INFO L125 PetriNetUnfolderBase]: For 1378571/1378571 co-relation queries the response was YES. [2024-06-21 22:07:17,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106661 conditions, 9103 events. 5638/9103 cut-off events. For 1378571/1378571 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 60434 event pairs, 1511 based on Foata normal form. 24/9117 useless extension candidates. Maximal degree in co-relation 106485. Up to 8349 conditions per place. [2024-06-21 22:07:17,536 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 467 selfloop transitions, 159 changer transitions 0/631 dead transitions. [2024-06-21 22:07:17,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 631 transitions, 15213 flow [2024-06-21 22:07:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:07:17,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 22:07:17,538 INFO L175 Difference]: Start difference. First operand has 371 places, 601 transitions, 13310 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:07:17,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 631 transitions, 15213 flow [2024-06-21 22:07:22,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 631 transitions, 14899 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:22,530 INFO L231 Difference]: Finished difference. Result has 374 places, 605 transitions, 13526 flow [2024-06-21 22:07:22,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12996, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13526, PETRI_PLACES=374, PETRI_TRANSITIONS=605} [2024-06-21 22:07:22,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-21 22:07:22,531 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 605 transitions, 13526 flow [2024-06-21 22:07:22,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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 22:07:22,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:22,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:22,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 22:07:22,531 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:22,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1986567219, now seen corresponding path program 1 times [2024-06-21 22:07:22,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:22,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192144366] [2024-06-21 22:07:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:22,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:25,292 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 22:07:25,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:25,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192144366] [2024-06-21 22:07:25,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192144366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:25,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:25,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:25,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545810231] [2024-06-21 22:07:25,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:25,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:25,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:25,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:25,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:25,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:25,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 605 transitions, 13526 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:25,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:25,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:25,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:29,070 INFO L124 PetriNetUnfolderBase]: 5643/9122 cut-off events. [2024-06-21 22:07:29,071 INFO L125 PetriNetUnfolderBase]: For 1307720/1307720 co-relation queries the response was YES. [2024-06-21 22:07:29,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106712 conditions, 9122 events. 5643/9122 cut-off events. For 1307720/1307720 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 60587 event pairs, 1536 based on Foata normal form. 1/9121 useless extension candidates. Maximal degree in co-relation 106535. Up to 8743 conditions per place. [2024-06-21 22:07:29,210 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 598 selfloop transitions, 28 changer transitions 0/631 dead transitions. [2024-06-21 22:07:29,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 631 transitions, 14980 flow [2024-06-21 22:07:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 22:07:29,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 22:07:29,212 INFO L175 Difference]: Start difference. First operand has 374 places, 605 transitions, 13526 flow. Second operand 8 states and 133 transitions. [2024-06-21 22:07:29,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 631 transitions, 14980 flow [2024-06-21 22:07:34,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 631 transitions, 14644 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:34,259 INFO L231 Difference]: Finished difference. Result has 377 places, 608 transitions, 13386 flow [2024-06-21 22:07:34,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13190, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13386, PETRI_PLACES=377, PETRI_TRANSITIONS=608} [2024-06-21 22:07:34,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-21 22:07:34,260 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 608 transitions, 13386 flow [2024-06-21 22:07:34,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:34,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:34,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:34,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 22:07:34,261 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:34,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:34,261 INFO L85 PathProgramCache]: Analyzing trace with hash -599650671, now seen corresponding path program 1 times [2024-06-21 22:07:34,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:34,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941414342] [2024-06-21 22:07:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:34,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:37,125 INFO 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 22:07:37,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:37,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941414342] [2024-06-21 22:07:37,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941414342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:37,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:37,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:37,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201077290] [2024-06-21 22:07:37,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:37,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:37,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:37,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:37,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:37,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:37,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 608 transitions, 13386 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:37,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:37,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:37,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:41,134 INFO L124 PetriNetUnfolderBase]: 5658/9153 cut-off events. [2024-06-21 22:07:41,134 INFO L125 PetriNetUnfolderBase]: For 1326306/1326306 co-relation queries the response was YES. [2024-06-21 22:07:41,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106538 conditions, 9153 events. 5658/9153 cut-off events. For 1326306/1326306 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 60795 event pairs, 1291 based on Foata normal form. 2/9153 useless extension candidates. Maximal degree in co-relation 106360. Up to 8383 conditions per place. [2024-06-21 22:07:41,271 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 557 selfloop transitions, 89 changer transitions 0/651 dead transitions. [2024-06-21 22:07:41,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 651 transitions, 15252 flow [2024-06-21 22:07:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 22:07:41,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 22:07:41,273 INFO L175 Difference]: Start difference. First operand has 377 places, 608 transitions, 13386 flow. Second operand 8 states and 156 transitions. [2024-06-21 22:07:41,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 651 transitions, 15252 flow [2024-06-21 22:07:46,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 651 transitions, 15078 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:46,501 INFO L231 Difference]: Finished difference. Result has 380 places, 613 transitions, 13630 flow [2024-06-21 22:07:46,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13212, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13630, PETRI_PLACES=380, PETRI_TRANSITIONS=613} [2024-06-21 22:07:46,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-21 22:07:46,502 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 613 transitions, 13630 flow [2024-06-21 22:07:46,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:46,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:46,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:46,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 22:07:46,502 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:46,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:46,503 INFO L85 PathProgramCache]: Analyzing trace with hash 411292629, now seen corresponding path program 2 times [2024-06-21 22:07:46,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:46,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133072076] [2024-06-21 22:07:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:46,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:49,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:49,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133072076] [2024-06-21 22:07:49,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133072076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:49,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:49,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:49,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803689464] [2024-06-21 22:07:49,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:49,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:49,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:49,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:49,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:07:49,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 613 transitions, 13630 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:49,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:49,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:07:49,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:53,083 INFO L124 PetriNetUnfolderBase]: 5671/9170 cut-off events. [2024-06-21 22:07:53,083 INFO L125 PetriNetUnfolderBase]: For 1352328/1352328 co-relation queries the response was YES. [2024-06-21 22:07:53,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107523 conditions, 9170 events. 5671/9170 cut-off events. For 1352328/1352328 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 61021 event pairs, 1517 based on Foata normal form. 2/9170 useless extension candidates. Maximal degree in co-relation 107343. Up to 8690 conditions per place. [2024-06-21 22:07:53,231 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 567 selfloop transitions, 74 changer transitions 0/646 dead transitions. [2024-06-21 22:07:53,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 646 transitions, 15160 flow [2024-06-21 22:07:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:07:53,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:07:53,233 INFO L175 Difference]: Start difference. First operand has 380 places, 613 transitions, 13630 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:07:53,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 646 transitions, 15160 flow [2024-06-21 22:07:58,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 646 transitions, 14926 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:58,447 INFO L231 Difference]: Finished difference. Result has 383 places, 618 transitions, 13705 flow [2024-06-21 22:07:58,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13428, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13705, PETRI_PLACES=383, PETRI_TRANSITIONS=618} [2024-06-21 22:07:58,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-21 22:07:58,448 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 618 transitions, 13705 flow [2024-06-21 22:07:58,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:58,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:58,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:58,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 22:07:58,448 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:58,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:58,449 INFO L85 PathProgramCache]: Analyzing trace with hash 973153237, now seen corresponding path program 3 times [2024-06-21 22:07:58,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:58,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057111335] [2024-06-21 22:07:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:58,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat