./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.2024-05-21_14-57-05.files/protection/safe020_power.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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.2024-05-21_14-57-05.files/protection/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-76401ed-m [2024-06-20 17:17:20,859 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:17:20,934 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:17:20,939 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:17:20,939 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:17:20,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:17:20,971 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:17:20,971 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:17:20,972 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:17:20,975 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:17:20,975 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:17:20,975 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:17:20,976 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:17:20,977 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:17:20,977 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:17:20,977 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:17:20,977 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:17:20,978 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:17:20,978 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:17:20,978 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:17:20,978 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:17:20,978 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:17:20,978 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:17:20,979 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:17:20,979 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:17:20,979 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:17:20,979 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:17:20,979 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:17:20,979 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:17:20,980 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:17:20,980 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:17:20,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:17:20,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:17:20,981 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:17:20,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:17:20,981 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:17:20,981 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:17:20,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:17:20,981 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:17:20,981 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:17:20,981 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:17:20,981 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:17:20,982 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:17:20,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:17:21,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:17:21,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:17:21,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:17:21,211 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:17:21,211 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:17:21,212 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_power.i [2024-06-20 17:17:22,312 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:17:22,506 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:17:22,506 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_power.i [2024-06-20 17:17:22,516 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f4f4a76/9a5775005df4409a93f8087b99a84861/FLAG9aacda942 [2024-06-20 17:17:22,525 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f4f4a76/9a5775005df4409a93f8087b99a84861 [2024-06-20 17:17:22,527 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:17:22,527 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:17:22,528 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe020_power.yml/witness.yml [2024-06-20 17:17:22,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:17:22,717 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:17:22,718 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:17:22,718 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:17:22,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:17:22,722 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:17:22" (1/2) ... [2024-06-20 17:17:22,723 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6744767a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:22, skipping insertion in model container [2024-06-20 17:17:22,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:17:22" (1/2) ... [2024-06-20 17:17:22,724 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24f48715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:22, skipping insertion in model container [2024-06-20 17:17:22,725 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:17:22" (2/2) ... [2024-06-20 17:17:22,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6744767a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:22, skipping insertion in model container [2024-06-20 17:17:22,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:17:22" (2/2) ... [2024-06-20 17:17:22,725 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:17:22,829 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:17:22,830 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-20 17:17:22,830 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-20 17:17:22,831 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-20 17:17:22,831 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:17:22,831 INFO L106 edCorrectnessWitness]: ghost_update [L860-L860] multithreaded = 1; [2024-06-20 17:17:22,867 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:17:23,229 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:17:23,255 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:17:23,402 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:17:23,440 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:17:23,441 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23 WrapperNode [2024-06-20 17:17:23,441 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:17:23,441 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:17:23,442 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:17:23,442 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:17:23,447 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 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,462 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 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,494 INFO L138 Inliner]: procedures = 175, calls = 90, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2024-06-20 17:17:23,495 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:17:23,495 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:17:23,495 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:17:23,496 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:17:23,508 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,519 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,551 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]. [2024-06-20 17:17:23,551 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,552 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,573 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,575 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,578 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:17:23,582 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:17:23,582 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:17:23,582 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:17:23,583 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23" (1/1) ... [2024-06-20 17:17:23,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:17:23,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:17:23,646 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) [2024-06-20 17:17:23,699 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 [2024-06-20 17:17:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:17:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:17:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:17:23,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:17:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:17:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:17:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:17:23,723 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:17:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:17:23,723 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:17:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:17:23,724 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:17:23,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:17:23,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:17:23,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:17:23,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:17:23,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:17:23,726 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:17:23,865 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:17:23,867 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:17:24,363 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:17:24,363 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:17:24,749 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:17:24,750 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:17:24,750 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:17:24 BoogieIcfgContainer [2024-06-20 17:17:24,750 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:17:24,752 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:17:24,752 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:17:24,754 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:17:24,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:17:22" (1/4) ... [2024-06-20 17:17:24,755 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8d79cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:17:24, skipping insertion in model container [2024-06-20 17:17:24,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:17:22" (2/4) ... [2024-06-20 17:17:24,755 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8d79cc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:17:24, skipping insertion in model container [2024-06-20 17:17:24,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:23" (3/4) ... [2024-06-20 17:17:24,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8d79cc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:17:24, skipping insertion in model container [2024-06-20 17:17:24,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:17:24" (4/4) ... [2024-06-20 17:17:24,757 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_power.i [2024-06-20 17:17:24,772 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:17:24,773 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:17:24,773 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:17:24,828 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:17:24,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:17:24,874 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 17:17:24,874 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:17:24,876 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. [2024-06-20 17:17:24,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:17:24,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 17:17:24,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:17:24,935 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;@1644a2c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:17:24,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:17:24,939 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:17:24,952 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:17:24,952 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:17:24,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:24,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:17:24,953 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)] === [2024-06-20 17:17:24,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash 884604256, now seen corresponding path program 1 times [2024-06-20 17:17:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:25,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110856617] [2024-06-20 17:17:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:25,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:26,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:26,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110856617] [2024-06-20 17:17:26,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110856617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:26,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:26,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:17:26,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113745326] [2024-06-20 17:17:26,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:26,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:17:26,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:17:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:17:26,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:17:26,588 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) [2024-06-20 17:17:26,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:26,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:17:26,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:27,158 INFO L124 PetriNetUnfolderBase]: 1160/1782 cut-off events. [2024-06-20 17:17:27,158 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-20 17:17:27,162 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. [2024-06-20 17:17:27,169 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-20 17:17:27,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 183 flow [2024-06-20 17:17:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:17:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:17:27,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-20 17:17:27,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-20 17:17:27,179 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 69 transitions. [2024-06-20 17:17:27,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 183 flow [2024-06-20 17:17:27,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:17:27,182 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 17:17:27,184 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} [2024-06-20 17:17:27,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 17:17:27,186 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 17:17:27,186 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) [2024-06-20 17:17:27,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:27,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:27,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:17:27,187 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)] === [2024-06-20 17:17:27,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:27,187 INFO L85 PathProgramCache]: Analyzing trace with hash -298776865, now seen corresponding path program 1 times [2024-06-20 17:17:27,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:27,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136661158] [2024-06-20 17:17:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:27,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:28,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:28,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136661158] [2024-06-20 17:17:28,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136661158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:28,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:28,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:17:28,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246709954] [2024-06-20 17:17:28,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:28,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:17:28,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:28,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:17:28,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:17:28,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:17:28,306 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) [2024-06-20 17:17:28,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:28,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:17:28,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:28,767 INFO L124 PetriNetUnfolderBase]: 1148/1764 cut-off events. [2024-06-20 17:17:28,767 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-20 17:17:28,769 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. [2024-06-20 17:17:28,775 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-20 17:17:28,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-20 17:17:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:17:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:17:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-20 17:17:28,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-20 17:17:28,777 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-20 17:17:28,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-20 17:17:28,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:17:28,778 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 17:17:28,779 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} [2024-06-20 17:17:28,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 17:17:28,779 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 17:17:28,780 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) [2024-06-20 17:17:28,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:28,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:28,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:17:28,780 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)] === [2024-06-20 17:17:28,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:28,781 INFO L85 PathProgramCache]: Analyzing trace with hash -772733475, now seen corresponding path program 1 times [2024-06-20 17:17:28,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:28,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244427179] [2024-06-20 17:17:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:28,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:30,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:30,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244427179] [2024-06-20 17:17:30,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244427179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:30,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:30,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:17:30,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630857616] [2024-06-20 17:17:30,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:30,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:17:30,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:30,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:17:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:17:30,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:17:30,744 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) [2024-06-20 17:17:30,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:30,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:17:30,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:31,410 INFO L124 PetriNetUnfolderBase]: 1139/1749 cut-off events. [2024-06-20 17:17:31,410 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-20 17:17:31,413 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. [2024-06-20 17:17:31,419 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-20 17:17:31,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 380 flow [2024-06-20 17:17:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-20 17:17:31,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-20 17:17:31,422 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 127 transitions. [2024-06-20 17:17:31,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 380 flow [2024-06-20 17:17:31,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 17:17:31,424 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-20 17:17:31,424 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} [2024-06-20 17:17:31,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-20 17:17:31,425 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-20 17:17:31,425 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) [2024-06-20 17:17:31,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:31,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:31,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:17:31,426 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)] === [2024-06-20 17:17:31,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:31,426 INFO L85 PathProgramCache]: Analyzing trace with hash -952377265, now seen corresponding path program 1 times [2024-06-20 17:17:31,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:31,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472716329] [2024-06-20 17:17:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:31,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:32,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:32,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472716329] [2024-06-20 17:17:32,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472716329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:32,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:32,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:17:32,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735746872] [2024-06-20 17:17:32,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:32,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:17:32,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:32,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:17:32,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:17:32,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:32,682 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) [2024-06-20 17:17:32,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:32,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:32,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:33,250 INFO L124 PetriNetUnfolderBase]: 1134/1742 cut-off events. [2024-06-20 17:17:33,251 INFO L125 PetriNetUnfolderBase]: For 1858/1858 co-relation queries the response was YES. [2024-06-20 17:17:33,253 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. [2024-06-20 17:17:33,260 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-20 17:17:33,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 339 flow [2024-06-20 17:17:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:17:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:17:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-20 17:17:33,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-20 17:17:33,262 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 89 transitions. [2024-06-20 17:17:33,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 339 flow [2024-06-20 17:17:33,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 312 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:17:33,265 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-20 17:17:33,265 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} [2024-06-20 17:17:33,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-20 17:17:33,266 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-20 17:17:33,266 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) [2024-06-20 17:17:33,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:33,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:33,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:17:33,267 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)] === [2024-06-20 17:17:33,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:33,267 INFO L85 PathProgramCache]: Analyzing trace with hash 541077699, now seen corresponding path program 1 times [2024-06-20 17:17:33,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:33,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777747171] [2024-06-20 17:17:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:33,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:34,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:34,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777747171] [2024-06-20 17:17:34,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777747171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:34,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:34,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:17:34,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222264907] [2024-06-20 17:17:34,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:34,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:17:34,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:34,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:17:34,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:17:34,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:34,979 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) [2024-06-20 17:17:34,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:34,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:34,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:35,560 INFO L124 PetriNetUnfolderBase]: 1129/1735 cut-off events. [2024-06-20 17:17:35,560 INFO L125 PetriNetUnfolderBase]: For 2654/2654 co-relation queries the response was YES. [2024-06-20 17:17:35,564 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. [2024-06-20 17:17:35,569 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-20 17:17:35,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 388 flow [2024-06-20 17:17:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 17:17:35,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:17:35,575 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 105 transitions. [2024-06-20 17:17:35,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 388 flow [2024-06-20 17:17:35,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 368 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:17:35,583 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-20 17:17:35,583 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} [2024-06-20 17:17:35,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-20 17:17:35,585 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-20 17:17:35,585 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) [2024-06-20 17:17:35,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:35,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:35,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:17:35,586 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)] === [2024-06-20 17:17:35,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:35,586 INFO L85 PathProgramCache]: Analyzing trace with hash -413133810, now seen corresponding path program 1 times [2024-06-20 17:17:35,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:35,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717552953] [2024-06-20 17:17:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:35,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:37,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:37,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717552953] [2024-06-20 17:17:37,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717552953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:37,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:37,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:17:37,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287927656] [2024-06-20 17:17:37,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:37,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:17:37,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:37,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:17:37,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:17:37,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:37,057 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) [2024-06-20 17:17:37,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:37,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:37,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:37,849 INFO L124 PetriNetUnfolderBase]: 1155/1785 cut-off events. [2024-06-20 17:17:37,849 INFO L125 PetriNetUnfolderBase]: For 3767/3767 co-relation queries the response was YES. [2024-06-20 17:17:37,851 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. [2024-06-20 17:17:37,862 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-20 17:17:37,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 454 flow [2024-06-20 17:17:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 17:17:37,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 17:17:37,875 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 6 states and 110 transitions. [2024-06-20 17:17:37,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 454 flow [2024-06-20 17:17:37,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 424 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 17:17:37,878 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 258 flow [2024-06-20 17:17:37,878 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} [2024-06-20 17:17:37,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-20 17:17:37,878 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 258 flow [2024-06-20 17:17:37,879 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) [2024-06-20 17:17:37,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:37,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:37,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:17:37,881 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)] === [2024-06-20 17:17:37,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:37,881 INFO L85 PathProgramCache]: Analyzing trace with hash -412954320, now seen corresponding path program 2 times [2024-06-20 17:17:37,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:37,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897009066] [2024-06-20 17:17:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:37,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:39,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:39,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897009066] [2024-06-20 17:17:39,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897009066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:39,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:39,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:17:39,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832032864] [2024-06-20 17:17:39,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:39,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:17:39,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:17:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:17:39,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:39,361 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) [2024-06-20 17:17:39,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:39,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:39,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:39,906 INFO L124 PetriNetUnfolderBase]: 1163/1796 cut-off events. [2024-06-20 17:17:39,907 INFO L125 PetriNetUnfolderBase]: For 5165/5165 co-relation queries the response was YES. [2024-06-20 17:17:39,939 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. [2024-06-20 17:17:39,947 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-20 17:17:39,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 480 flow [2024-06-20 17:17:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 17:17:39,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-20 17:17:39,949 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 258 flow. Second operand 6 states and 109 transitions. [2024-06-20 17:17:39,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 480 flow [2024-06-20 17:17:39,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 448 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:17:39,954 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 298 flow [2024-06-20 17:17:39,954 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} [2024-06-20 17:17:39,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-20 17:17:39,955 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 298 flow [2024-06-20 17:17:39,955 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) [2024-06-20 17:17:39,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:39,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:39,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:17:39,956 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)] === [2024-06-20 17:17:39,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:39,956 INFO L85 PathProgramCache]: Analyzing trace with hash -406458642, now seen corresponding path program 1 times [2024-06-20 17:17:39,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:39,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281067710] [2024-06-20 17:17:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:39,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:41,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:41,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281067710] [2024-06-20 17:17:41,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281067710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:41,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:41,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:41,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315179166] [2024-06-20 17:17:41,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:41,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:41,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:41,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:41,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:41,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:41,935 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) [2024-06-20 17:17:41,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:41,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:41,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:42,550 INFO L124 PetriNetUnfolderBase]: 1155/1791 cut-off events. [2024-06-20 17:17:42,550 INFO L125 PetriNetUnfolderBase]: For 6606/6606 co-relation queries the response was YES. [2024-06-20 17:17:42,555 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. [2024-06-20 17:17:42,567 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 64 selfloop transitions, 13 changer transitions 0/82 dead transitions. [2024-06-20 17:17:42,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 536 flow [2024-06-20 17:17:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:17:42,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:17:42,570 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 298 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:17:42,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 536 flow [2024-06-20 17:17:42,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 488 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 17:17:42,575 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 311 flow [2024-06-20 17:17:42,575 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} [2024-06-20 17:17:42,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-20 17:17:42,577 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 311 flow [2024-06-20 17:17:42,577 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) [2024-06-20 17:17:42,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:42,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:42,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:17:42,578 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)] === [2024-06-20 17:17:42,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash 77755620, now seen corresponding path program 1 times [2024-06-20 17:17:42,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:42,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122427090] [2024-06-20 17:17:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:42,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:44,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:44,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122427090] [2024-06-20 17:17:44,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122427090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:44,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:44,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:44,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114633658] [2024-06-20 17:17:44,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:44,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:44,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:44,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:44,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:44,356 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) [2024-06-20 17:17:44,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:44,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:44,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:45,015 INFO L124 PetriNetUnfolderBase]: 1181/1829 cut-off events. [2024-06-20 17:17:45,015 INFO L125 PetriNetUnfolderBase]: For 8123/8123 co-relation queries the response was YES. [2024-06-20 17:17:45,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7079 conditions, 1829 events. 1181/1829 cut-off events. For 8123/8123 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8623 event pairs, 406 based on Foata normal form. 4/1831 useless extension candidates. Maximal degree in co-relation 7056. Up to 1714 conditions per place. [2024-06-20 17:17:45,025 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 70 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2024-06-20 17:17:45,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 587 flow [2024-06-20 17:17:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 17:17:45,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-20 17:17:45,030 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 311 flow. Second operand 7 states and 127 transitions. [2024-06-20 17:17:45,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 587 flow [2024-06-20 17:17:45,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 544 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:45,037 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 349 flow [2024-06-20 17:17:45,037 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=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-20 17:17:45,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-20 17:17:45,038 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 349 flow [2024-06-20 17:17:45,039 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) [2024-06-20 17:17:45,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:45,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:45,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:17:45,039 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)] === [2024-06-20 17:17:45,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash 284409060, now seen corresponding path program 2 times [2024-06-20 17:17:45,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:45,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074561868] [2024-06-20 17:17:45,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:45,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:46,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:46,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074561868] [2024-06-20 17:17:46,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074561868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:46,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:46,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:46,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879656546] [2024-06-20 17:17:46,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:46,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:46,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:46,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:46,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:46,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 349 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) [2024-06-20 17:17:46,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:46,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:46,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:47,468 INFO L124 PetriNetUnfolderBase]: 1207/1866 cut-off events. [2024-06-20 17:17:47,468 INFO L125 PetriNetUnfolderBase]: For 10269/10269 co-relation queries the response was YES. [2024-06-20 17:17:47,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7774 conditions, 1866 events. 1207/1866 cut-off events. For 10269/10269 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8745 event pairs, 415 based on Foata normal form. 4/1866 useless extension candidates. Maximal degree in co-relation 7750. Up to 1719 conditions per place. [2024-06-20 17:17:47,477 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 20 changer transitions 0/91 dead transitions. [2024-06-20 17:17:47,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 633 flow [2024-06-20 17:17:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:17:47,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:17:47,480 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 349 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:17:47,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 633 flow [2024-06-20 17:17:47,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 582 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:47,490 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 397 flow [2024-06-20 17:17:47,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=397, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-20 17:17:47,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-20 17:17:47,491 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 397 flow [2024-06-20 17:17:47,492 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) [2024-06-20 17:17:47,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:47,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:47,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:17:47,492 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)] === [2024-06-20 17:17:47,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash 284675970, now seen corresponding path program 3 times [2024-06-20 17:17:47,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:47,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232844047] [2024-06-20 17:17:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:47,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:49,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:49,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232844047] [2024-06-20 17:17:49,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232844047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:49,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:49,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:49,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160902837] [2024-06-20 17:17:49,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:49,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:49,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:49,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:49,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:49,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:49,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 397 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) [2024-06-20 17:17:49,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:49,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:49,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:50,054 INFO L124 PetriNetUnfolderBase]: 1202/1859 cut-off events. [2024-06-20 17:17:50,054 INFO L125 PetriNetUnfolderBase]: For 12463/12463 co-relation queries the response was YES. [2024-06-20 17:17:50,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8242 conditions, 1859 events. 1202/1859 cut-off events. For 12463/12463 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8750 event pairs, 415 based on Foata normal form. 2/1857 useless extension candidates. Maximal degree in co-relation 8217. Up to 1668 conditions per place. [2024-06-20 17:17:50,064 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 64 selfloop transitions, 30 changer transitions 0/99 dead transitions. [2024-06-20 17:17:50,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 709 flow [2024-06-20 17:17:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:17:50,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:17:50,070 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 397 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:17:50,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 709 flow [2024-06-20 17:17:50,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 640 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:50,076 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 445 flow [2024-06-20 17:17:50,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=445, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-20 17:17:50,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-20 17:17:50,077 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 445 flow [2024-06-20 17:17:50,078 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) [2024-06-20 17:17:50,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:50,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:50,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:17:50,078 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)] === [2024-06-20 17:17:50,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:50,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2007542959, now seen corresponding path program 1 times [2024-06-20 17:17:50,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:50,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428307709] [2024-06-20 17:17:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:50,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:51,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:51,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428307709] [2024-06-20 17:17:51,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428307709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:51,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:51,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:51,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445636574] [2024-06-20 17:17:51,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:51,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:51,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:51,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:51,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:51,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:51,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 445 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) [2024-06-20 17:17:51,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:51,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:51,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:52,530 INFO L124 PetriNetUnfolderBase]: 1260/1966 cut-off events. [2024-06-20 17:17:52,530 INFO L125 PetriNetUnfolderBase]: For 14875/14875 co-relation queries the response was YES. [2024-06-20 17:17:52,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9035 conditions, 1966 events. 1260/1966 cut-off events. For 14875/14875 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9377 event pairs, 406 based on Foata normal form. 2/1966 useless extension candidates. Maximal degree in co-relation 9009. Up to 1818 conditions per place. [2024-06-20 17:17:52,540 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 88 selfloop transitions, 24 changer transitions 0/117 dead transitions. [2024-06-20 17:17:52,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 117 transitions, 856 flow [2024-06-20 17:17:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:17:52,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:17:52,557 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 445 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:17:52,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 117 transitions, 856 flow [2024-06-20 17:17:52,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 117 transitions, 773 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:52,568 INFO L231 Difference]: Finished difference. Result has 73 places, 82 transitions, 545 flow [2024-06-20 17:17:52,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=545, PETRI_PLACES=73, PETRI_TRANSITIONS=82} [2024-06-20 17:17:52,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-20 17:17:52,569 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 82 transitions, 545 flow [2024-06-20 17:17:52,570 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) [2024-06-20 17:17:52,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:52,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:52,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:17:52,570 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)] === [2024-06-20 17:17:52,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:52,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1889309747, now seen corresponding path program 2 times [2024-06-20 17:17:52,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:52,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210331694] [2024-06-20 17:17:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:52,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:54,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:54,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210331694] [2024-06-20 17:17:54,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210331694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:54,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:54,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:54,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827611409] [2024-06-20 17:17:54,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:54,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:54,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:54,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:54,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:54,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 545 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) [2024-06-20 17:17:54,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:54,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:54,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:55,139 INFO L124 PetriNetUnfolderBase]: 1255/1959 cut-off events. [2024-06-20 17:17:55,140 INFO L125 PetriNetUnfolderBase]: For 17568/17568 co-relation queries the response was YES. [2024-06-20 17:17:55,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9394 conditions, 1959 events. 1255/1959 cut-off events. For 17568/17568 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9376 event pairs, 388 based on Foata normal form. 2/1959 useless extension candidates. Maximal degree in co-relation 9365. Up to 1794 conditions per place. [2024-06-20 17:17:55,151 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 86 selfloop transitions, 26 changer transitions 0/117 dead transitions. [2024-06-20 17:17:55,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 915 flow [2024-06-20 17:17:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:17:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:17:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 17:17:55,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 17:17:55,154 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 545 flow. Second operand 7 states and 129 transitions. [2024-06-20 17:17:55,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 915 flow [2024-06-20 17:17:55,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 853 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 17:17:55,164 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 604 flow [2024-06-20 17:17:55,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2024-06-20 17:17:55,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-20 17:17:55,165 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 604 flow [2024-06-20 17:17:55,165 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) [2024-06-20 17:17:55,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:55,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:55,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:17:55,166 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)] === [2024-06-20 17:17:55,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1884541203, now seen corresponding path program 1 times [2024-06-20 17:17:55,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:55,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975038283] [2024-06-20 17:17:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:55,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:57,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:57,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975038283] [2024-06-20 17:17:57,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975038283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:57,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:57,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982866727] [2024-06-20 17:17:57,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:57,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:57,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:17:57,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:57,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 604 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) [2024-06-20 17:17:57,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:57,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:57,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:57,968 INFO L124 PetriNetUnfolderBase]: 1363/2139 cut-off events. [2024-06-20 17:17:57,968 INFO L125 PetriNetUnfolderBase]: For 24549/24549 co-relation queries the response was YES. [2024-06-20 17:17:57,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10729 conditions, 2139 events. 1363/2139 cut-off events. For 24549/24549 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10499 event pairs, 396 based on Foata normal form. 24/2161 useless extension candidates. Maximal degree in co-relation 10699. Up to 1825 conditions per place. [2024-06-20 17:17:57,981 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 102 selfloop transitions, 20 changer transitions 0/127 dead transitions. [2024-06-20 17:17:57,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1040 flow [2024-06-20 17:17:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:17:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:17:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:17:57,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:17:57,985 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 604 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:17:57,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1040 flow [2024-06-20 17:17:57,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 127 transitions, 943 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 17:17:58,000 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 602 flow [2024-06-20 17:17:58,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=602, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-20 17:17:58,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-20 17:17:58,001 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 602 flow [2024-06-20 17:17:58,001 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) [2024-06-20 17:17:58,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:58,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:58,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:17:58,002 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)] === [2024-06-20 17:17:58,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:58,002 INFO L85 PathProgramCache]: Analyzing trace with hash 226748141, now seen corresponding path program 2 times [2024-06-20 17:17:58,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:58,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146581333] [2024-06-20 17:17:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:58,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:59,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:59,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146581333] [2024-06-20 17:17:59,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146581333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:59,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:59,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:17:59,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657083728] [2024-06-20 17:17:59,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:59,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:17:59,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:59,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:17:59,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:00,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:00,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 602 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) [2024-06-20 17:18:00,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:00,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:00,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:00,854 INFO L124 PetriNetUnfolderBase]: 1383/2166 cut-off events. [2024-06-20 17:18:00,855 INFO L125 PetriNetUnfolderBase]: For 22950/22950 co-relation queries the response was YES. [2024-06-20 17:18:00,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10764 conditions, 2166 events. 1383/2166 cut-off events. For 22950/22950 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10650 event pairs, 405 based on Foata normal form. 4/2164 useless extension candidates. Maximal degree in co-relation 10733. Up to 2003 conditions per place. [2024-06-20 17:18:00,865 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 24 changer transitions 0/129 dead transitions. [2024-06-20 17:18:00,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 1048 flow [2024-06-20 17:18:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:18:00,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 17:18:00,867 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 602 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:18:00,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 1048 flow [2024-06-20 17:18:00,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 1001 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:00,878 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 745 flow [2024-06-20 17:18:00,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=745, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2024-06-20 17:18:00,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-20 17:18:00,880 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 745 flow [2024-06-20 17:18:00,880 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) [2024-06-20 17:18:00,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:00,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:00,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:18:00,880 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)] === [2024-06-20 17:18:00,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:00,881 INFO L85 PathProgramCache]: Analyzing trace with hash 235022351, now seen corresponding path program 3 times [2024-06-20 17:18:00,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:00,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236094840] [2024-06-20 17:18:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:00,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:02,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:02,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236094840] [2024-06-20 17:18:02,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236094840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:02,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:02,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:02,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224861044] [2024-06-20 17:18:02,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:02,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:02,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:02,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:02,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:02,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:02,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 745 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) [2024-06-20 17:18:02,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:02,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:02,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:03,772 INFO L124 PetriNetUnfolderBase]: 1491/2352 cut-off events. [2024-06-20 17:18:03,773 INFO L125 PetriNetUnfolderBase]: For 29499/29499 co-relation queries the response was YES. [2024-06-20 17:18:03,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12039 conditions, 2352 events. 1491/2352 cut-off events. For 29499/29499 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11874 event pairs, 423 based on Foata normal form. 24/2370 useless extension candidates. Maximal degree in co-relation 12004. Up to 1938 conditions per place. [2024-06-20 17:18:03,785 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 43 changer transitions 0/140 dead transitions. [2024-06-20 17:18:03,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 140 transitions, 1205 flow [2024-06-20 17:18:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:18:03,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 17:18:03,787 INFO L175 Difference]: Start difference. First operand has 85 places, 97 transitions, 745 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:18:03,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 140 transitions, 1205 flow [2024-06-20 17:18:03,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 140 transitions, 1127 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:03,804 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 814 flow [2024-06-20 17:18:03,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=814, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-20 17:18:03,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-20 17:18:03,805 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 814 flow [2024-06-20 17:18:03,805 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) [2024-06-20 17:18:03,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:03,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:03,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:18:03,806 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)] === [2024-06-20 17:18:03,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash 235319021, now seen corresponding path program 4 times [2024-06-20 17:18:03,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:03,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871890611] [2024-06-20 17:18:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:03,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:05,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871890611] [2024-06-20 17:18:05,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871890611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:05,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:05,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482748692] [2024-06-20 17:18:05,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:05,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:05,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:05,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:05,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 814 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) [2024-06-20 17:18:05,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:05,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:05,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:06,349 INFO L124 PetriNetUnfolderBase]: 1483/2346 cut-off events. [2024-06-20 17:18:06,349 INFO L125 PetriNetUnfolderBase]: For 29771/29771 co-relation queries the response was YES. [2024-06-20 17:18:06,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12168 conditions, 2346 events. 1483/2346 cut-off events. For 29771/29771 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11954 event pairs, 385 based on Foata normal form. 4/2344 useless extension candidates. Maximal degree in co-relation 12132. Up to 2044 conditions per place. [2024-06-20 17:18:06,362 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 39 changer transitions 0/138 dead transitions. [2024-06-20 17:18:06,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 138 transitions, 1293 flow [2024-06-20 17:18:06,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:18:06,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 17:18:06,365 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 814 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:18:06,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 138 transitions, 1293 flow [2024-06-20 17:18:06,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 138 transitions, 1185 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 17:18:06,386 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 944 flow [2024-06-20 17:18:06,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=944, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-06-20 17:18:06,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-20 17:18:06,387 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 944 flow [2024-06-20 17:18:06,387 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) [2024-06-20 17:18:06,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:06,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:06,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:18:06,387 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)] === [2024-06-20 17:18:06,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash 566421038, now seen corresponding path program 1 times [2024-06-20 17:18:06,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:06,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851628922] [2024-06-20 17:18:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:06,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:07,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:07,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851628922] [2024-06-20 17:18:07,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851628922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:07,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:07,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:18:07,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039078493] [2024-06-20 17:18:07,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:07,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:18:07,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:07,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:18:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:18:07,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:07,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 944 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) [2024-06-20 17:18:07,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:07,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:07,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:08,703 INFO L124 PetriNetUnfolderBase]: 1480/2338 cut-off events. [2024-06-20 17:18:08,703 INFO L125 PetriNetUnfolderBase]: For 28340/28342 co-relation queries the response was YES. [2024-06-20 17:18:08,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12280 conditions, 2338 events. 1480/2338 cut-off events. For 28340/28342 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11843 event pairs, 423 based on Foata normal form. 1/2337 useless extension candidates. Maximal degree in co-relation 12241. Up to 2262 conditions per place. [2024-06-20 17:18:08,715 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 105 selfloop transitions, 8 changer transitions 0/118 dead transitions. [2024-06-20 17:18:08,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 118 transitions, 1218 flow [2024-06-20 17:18:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:18:08,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:18:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-20 17:18:08,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:18:08,719 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 944 flow. Second operand 5 states and 84 transitions. [2024-06-20 17:18:08,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 118 transitions, 1218 flow [2024-06-20 17:18:08,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 118 transitions, 1079 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-20 17:18:08,746 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 853 flow [2024-06-20 17:18:08,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=853, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2024-06-20 17:18:08,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-20 17:18:08,747 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 853 flow [2024-06-20 17:18:08,747 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) [2024-06-20 17:18:08,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:08,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:08,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:18:08,748 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)] === [2024-06-20 17:18:08,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1560941829, now seen corresponding path program 1 times [2024-06-20 17:18:08,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:08,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563256079] [2024-06-20 17:18:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:08,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:10,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:10,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563256079] [2024-06-20 17:18:10,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563256079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:10,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:10,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:10,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579110399] [2024-06-20 17:18:10,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:10,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:10,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:10,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:10,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:10,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:10,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 853 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) [2024-06-20 17:18:10,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:10,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:10,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:12,079 INFO L124 PetriNetUnfolderBase]: 1493/2366 cut-off events. [2024-06-20 17:18:12,079 INFO L125 PetriNetUnfolderBase]: For 29199/29199 co-relation queries the response was YES. [2024-06-20 17:18:12,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12356 conditions, 2366 events. 1493/2366 cut-off events. For 29199/29199 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11972 event pairs, 395 based on Foata normal form. 2/2366 useless extension candidates. Maximal degree in co-relation 12316. Up to 2172 conditions per place. [2024-06-20 17:18:12,094 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 29 changer transitions 0/148 dead transitions. [2024-06-20 17:18:12,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 148 transitions, 1305 flow [2024-06-20 17:18:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:12,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:18:12,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:18:12,096 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 853 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:18:12,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 148 transitions, 1305 flow [2024-06-20 17:18:12,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 148 transitions, 1279 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:12,115 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 956 flow [2024-06-20 17:18:12,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=956, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2024-06-20 17:18:12,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-20 17:18:12,116 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 956 flow [2024-06-20 17:18:12,116 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) [2024-06-20 17:18:12,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:12,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:12,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:18:12,117 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)] === [2024-06-20 17:18:12,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:12,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1708758819, now seen corresponding path program 2 times [2024-06-20 17:18:12,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:12,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103671033] [2024-06-20 17:18:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:12,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:14,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103671033] [2024-06-20 17:18:14,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103671033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:14,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:14,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:14,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049813917] [2024-06-20 17:18:14,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:14,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:14,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:14,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:14,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:14,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 956 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) [2024-06-20 17:18:14,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:14,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:14,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:15,174 INFO L124 PetriNetUnfolderBase]: 1506/2388 cut-off events. [2024-06-20 17:18:15,175 INFO L125 PetriNetUnfolderBase]: For 33362/33364 co-relation queries the response was YES. [2024-06-20 17:18:15,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13052 conditions, 2388 events. 1506/2388 cut-off events. For 33362/33364 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12150 event pairs, 401 based on Foata normal form. 2/2388 useless extension candidates. Maximal degree in co-relation 13011. Up to 2130 conditions per place. [2024-06-20 17:18:15,198 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 100 selfloop transitions, 41 changer transitions 0/146 dead transitions. [2024-06-20 17:18:15,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 146 transitions, 1390 flow [2024-06-20 17:18:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:18:15,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:18:15,200 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 956 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:18:15,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 146 transitions, 1390 flow [2024-06-20 17:18:15,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1287 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:15,226 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 1011 flow [2024-06-20 17:18:15,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1011, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2024-06-20 17:18:15,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-20 17:18:15,226 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 1011 flow [2024-06-20 17:18:15,227 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) [2024-06-20 17:18:15,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:15,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:15,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:18:15,227 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)] === [2024-06-20 17:18:15,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1764557123, now seen corresponding path program 3 times [2024-06-20 17:18:15,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:15,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246682619] [2024-06-20 17:18:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:15,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:17,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:17,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246682619] [2024-06-20 17:18:17,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246682619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:17,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:17,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:17,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842669753] [2024-06-20 17:18:17,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:17,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:17,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:17,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:17,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:17,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:17,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 1011 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) [2024-06-20 17:18:17,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:17,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:17,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:18,415 INFO L124 PetriNetUnfolderBase]: 1519/2411 cut-off events. [2024-06-20 17:18:18,416 INFO L125 PetriNetUnfolderBase]: For 38039/38039 co-relation queries the response was YES. [2024-06-20 17:18:18,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13623 conditions, 2411 events. 1519/2411 cut-off events. For 38039/38039 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12360 event pairs, 402 based on Foata normal form. 2/2407 useless extension candidates. Maximal degree in co-relation 13581. Up to 2202 conditions per place. [2024-06-20 17:18:18,429 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 33 changer transitions 0/153 dead transitions. [2024-06-20 17:18:18,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 153 transitions, 1483 flow [2024-06-20 17:18:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:18:18,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-20 17:18:18,430 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 1011 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:18:18,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 153 transitions, 1483 flow [2024-06-20 17:18:18,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 153 transitions, 1349 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:18,452 INFO L231 Difference]: Finished difference. Result has 105 places, 117 transitions, 1025 flow [2024-06-20 17:18:18,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1025, PETRI_PLACES=105, PETRI_TRANSITIONS=117} [2024-06-20 17:18:18,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-20 17:18:18,453 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 117 transitions, 1025 flow [2024-06-20 17:18:18,453 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) [2024-06-20 17:18:18,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:18,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:18,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:18:18,454 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)] === [2024-06-20 17:18:18,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:18,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1304247743, now seen corresponding path program 4 times [2024-06-20 17:18:18,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:18,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599035244] [2024-06-20 17:18:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:18,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:20,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:20,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599035244] [2024-06-20 17:18:20,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599035244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:20,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:20,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:20,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066200510] [2024-06-20 17:18:20,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:20,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:20,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:20,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:20,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 117 transitions, 1025 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) [2024-06-20 17:18:20,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:20,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:20,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:21,529 INFO L124 PetriNetUnfolderBase]: 1514/2396 cut-off events. [2024-06-20 17:18:21,529 INFO L125 PetriNetUnfolderBase]: For 42025/42025 co-relation queries the response was YES. [2024-06-20 17:18:21,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13814 conditions, 2396 events. 1514/2396 cut-off events. For 42025/42025 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12238 event pairs, 415 based on Foata normal form. 2/2387 useless extension candidates. Maximal degree in co-relation 13771. Up to 2043 conditions per place. [2024-06-20 17:18:21,542 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 63 changer transitions 0/149 dead transitions. [2024-06-20 17:18:21,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 149 transitions, 1469 flow [2024-06-20 17:18:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 17:18:21,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 17:18:21,544 INFO L175 Difference]: Start difference. First operand has 105 places, 117 transitions, 1025 flow. Second operand 8 states and 143 transitions. [2024-06-20 17:18:21,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 149 transitions, 1469 flow [2024-06-20 17:18:21,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 149 transitions, 1335 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-20 17:18:21,567 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 1105 flow [2024-06-20 17:18:21,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1105, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2024-06-20 17:18:21,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-20 17:18:21,568 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 1105 flow [2024-06-20 17:18:21,568 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) [2024-06-20 17:18:21,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:21,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:21,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:18:21,569 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)] === [2024-06-20 17:18:21,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash 390803991, now seen corresponding path program 1 times [2024-06-20 17:18:21,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:21,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100829782] [2024-06-20 17:18:21,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:21,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:23,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:23,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100829782] [2024-06-20 17:18:23,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100829782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:23,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:23,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:18:23,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488715372] [2024-06-20 17:18:23,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:23,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:18:23,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:23,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:18:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:18:23,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:23,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 1105 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) [2024-06-20 17:18:23,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:23,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:23,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:24,245 INFO L124 PetriNetUnfolderBase]: 1536/2436 cut-off events. [2024-06-20 17:18:24,245 INFO L125 PetriNetUnfolderBase]: For 46924/46924 co-relation queries the response was YES. [2024-06-20 17:18:24,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14396 conditions, 2436 events. 1536/2436 cut-off events. For 46924/46924 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12436 event pairs, 407 based on Foata normal form. 6/2431 useless extension candidates. Maximal degree in co-relation 14353. Up to 2206 conditions per place. [2024-06-20 17:18:24,260 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 112 selfloop transitions, 27 changer transitions 0/144 dead transitions. [2024-06-20 17:18:24,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 144 transitions, 1575 flow [2024-06-20 17:18:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:18:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:18:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 17:18:24,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:18:24,262 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 1105 flow. Second operand 6 states and 106 transitions. [2024-06-20 17:18:24,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 144 transitions, 1575 flow [2024-06-20 17:18:24,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 144 transitions, 1371 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:24,287 INFO L231 Difference]: Finished difference. Result has 106 places, 128 transitions, 1070 flow [2024-06-20 17:18:24,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1070, PETRI_PLACES=106, PETRI_TRANSITIONS=128} [2024-06-20 17:18:24,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-20 17:18:24,288 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 128 transitions, 1070 flow [2024-06-20 17:18:24,289 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) [2024-06-20 17:18:24,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:24,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:24,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:18:24,290 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)] === [2024-06-20 17:18:24,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:24,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1382910256, now seen corresponding path program 1 times [2024-06-20 17:18:24,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:24,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606147907] [2024-06-20 17:18:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:24,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:26,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:26,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606147907] [2024-06-20 17:18:26,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606147907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:26,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:26,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:26,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298503679] [2024-06-20 17:18:26,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:26,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:26,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:26,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:26,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:26,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:26,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 128 transitions, 1070 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) [2024-06-20 17:18:26,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:26,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:26,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:27,179 INFO L124 PetriNetUnfolderBase]: 1556/2477 cut-off events. [2024-06-20 17:18:27,179 INFO L125 PetriNetUnfolderBase]: For 49864/49864 co-relation queries the response was YES. [2024-06-20 17:18:27,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14879 conditions, 2477 events. 1556/2477 cut-off events. For 49864/49864 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12680 event pairs, 256 based on Foata normal form. 4/2479 useless extension candidates. Maximal degree in co-relation 14834. Up to 2230 conditions per place. [2024-06-20 17:18:27,195 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 140 selfloop transitions, 24 changer transitions 0/169 dead transitions. [2024-06-20 17:18:27,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 169 transitions, 1562 flow [2024-06-20 17:18:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:18:27,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:18:27,197 INFO L175 Difference]: Start difference. First operand has 106 places, 128 transitions, 1070 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:18:27,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 169 transitions, 1562 flow [2024-06-20 17:18:27,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 169 transitions, 1510 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 17:18:27,230 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 1127 flow [2024-06-20 17:18:27,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1127, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2024-06-20 17:18:27,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-20 17:18:27,231 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 1127 flow [2024-06-20 17:18:27,232 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) [2024-06-20 17:18:27,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:27,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:27,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:18:27,232 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)] === [2024-06-20 17:18:27,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:27,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1144553356, now seen corresponding path program 2 times [2024-06-20 17:18:27,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:27,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29081911] [2024-06-20 17:18:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:27,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:29,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:29,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29081911] [2024-06-20 17:18:29,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29081911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:29,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:29,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:29,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227431403] [2024-06-20 17:18:29,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:29,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:29,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:29,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:29,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:29,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 1127 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) [2024-06-20 17:18:29,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:29,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:29,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:30,361 INFO L124 PetriNetUnfolderBase]: 1548/2469 cut-off events. [2024-06-20 17:18:30,361 INFO L125 PetriNetUnfolderBase]: For 51993/51993 co-relation queries the response was YES. [2024-06-20 17:18:30,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15022 conditions, 2469 events. 1548/2469 cut-off events. For 51993/51993 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12770 event pairs, 359 based on Foata normal form. 4/2471 useless extension candidates. Maximal degree in co-relation 14975. Up to 2244 conditions per place. [2024-06-20 17:18:30,378 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 28 changer transitions 0/170 dead transitions. [2024-06-20 17:18:30,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 170 transitions, 1623 flow [2024-06-20 17:18:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:18:30,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-20 17:18:30,379 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 1127 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:18:30,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 170 transitions, 1623 flow [2024-06-20 17:18:30,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 170 transitions, 1532 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:30,411 INFO L231 Difference]: Finished difference. Result has 114 places, 132 transitions, 1158 flow [2024-06-20 17:18:30,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1158, PETRI_PLACES=114, PETRI_TRANSITIONS=132} [2024-06-20 17:18:30,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-20 17:18:30,412 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 132 transitions, 1158 flow [2024-06-20 17:18:30,412 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) [2024-06-20 17:18:30,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:30,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:30,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:18:30,412 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)] === [2024-06-20 17:18:30,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash 107254774, now seen corresponding path program 1 times [2024-06-20 17:18:30,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:30,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190379983] [2024-06-20 17:18:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:32,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:32,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190379983] [2024-06-20 17:18:32,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190379983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:32,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:32,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:32,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924925284] [2024-06-20 17:18:32,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:32,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:32,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:32,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:32,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 132 transitions, 1158 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) [2024-06-20 17:18:32,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:32,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:32,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:33,744 INFO L124 PetriNetUnfolderBase]: 1616/2585 cut-off events. [2024-06-20 17:18:33,745 INFO L125 PetriNetUnfolderBase]: For 62647/62647 co-relation queries the response was YES. [2024-06-20 17:18:33,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16020 conditions, 2585 events. 1616/2585 cut-off events. For 62647/62647 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13508 event pairs, 367 based on Foata normal form. 16/2599 useless extension candidates. Maximal degree in co-relation 15972. Up to 2259 conditions per place. [2024-06-20 17:18:33,761 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 30 changer transitions 0/179 dead transitions. [2024-06-20 17:18:33,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 179 transitions, 1720 flow [2024-06-20 17:18:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:18:33,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 17:18:33,763 INFO L175 Difference]: Start difference. First operand has 114 places, 132 transitions, 1158 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:18:33,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 179 transitions, 1720 flow [2024-06-20 17:18:33,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 179 transitions, 1618 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:33,798 INFO L231 Difference]: Finished difference. Result has 117 places, 133 transitions, 1169 flow [2024-06-20 17:18:33,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1169, PETRI_PLACES=117, PETRI_TRANSITIONS=133} [2024-06-20 17:18:33,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-20 17:18:33,799 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 133 transitions, 1169 flow [2024-06-20 17:18:33,799 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) [2024-06-20 17:18:33,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:33,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:33,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:18:33,800 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)] === [2024-06-20 17:18:33,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:33,800 INFO L85 PathProgramCache]: Analyzing trace with hash 394614168, now seen corresponding path program 2 times [2024-06-20 17:18:33,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:33,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145490372] [2024-06-20 17:18:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:36,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:36,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145490372] [2024-06-20 17:18:36,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145490372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:36,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:36,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:36,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051889765] [2024-06-20 17:18:36,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:36,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:36,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:36,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:36,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:36,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:36,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 133 transitions, 1169 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) [2024-06-20 17:18:36,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:36,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:36,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:37,312 INFO L124 PetriNetUnfolderBase]: 1684/2713 cut-off events. [2024-06-20 17:18:37,312 INFO L125 PetriNetUnfolderBase]: For 69453/69453 co-relation queries the response was YES. [2024-06-20 17:18:37,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16933 conditions, 2713 events. 1684/2713 cut-off events. For 69453/69453 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14453 event pairs, 387 based on Foata normal form. 16/2727 useless extension candidates. Maximal degree in co-relation 16884. Up to 2400 conditions per place. [2024-06-20 17:18:37,331 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 146 selfloop transitions, 26 changer transitions 0/177 dead transitions. [2024-06-20 17:18:37,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 177 transitions, 1721 flow [2024-06-20 17:18:37,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:18:37,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:18:37,333 INFO L175 Difference]: Start difference. First operand has 117 places, 133 transitions, 1169 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:18:37,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 177 transitions, 1721 flow [2024-06-20 17:18:37,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 177 transitions, 1646 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:18:37,379 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1201 flow [2024-06-20 17:18:37,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1201, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2024-06-20 17:18:37,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-20 17:18:37,380 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1201 flow [2024-06-20 17:18:37,380 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) [2024-06-20 17:18:37,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:37,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:37,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:18:37,381 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)] === [2024-06-20 17:18:37,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:37,381 INFO L85 PathProgramCache]: Analyzing trace with hash 394851318, now seen corresponding path program 3 times [2024-06-20 17:18:37,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:37,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096433209] [2024-06-20 17:18:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:37,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:39,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:39,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096433209] [2024-06-20 17:18:39,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096433209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:39,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:39,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:39,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010256563] [2024-06-20 17:18:39,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:39,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:39,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:39,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:39,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:39,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:39,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 134 transitions, 1201 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) [2024-06-20 17:18:39,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:39,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:39,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:40,892 INFO L124 PetriNetUnfolderBase]: 1780/2878 cut-off events. [2024-06-20 17:18:40,892 INFO L125 PetriNetUnfolderBase]: For 74837/74839 co-relation queries the response was YES. [2024-06-20 17:18:40,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17957 conditions, 2878 events. 1780/2878 cut-off events. For 74837/74839 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15587 event pairs, 401 based on Foata normal form. 12/2888 useless extension candidates. Maximal degree in co-relation 17907. Up to 2152 conditions per place. [2024-06-20 17:18:40,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 129 selfloop transitions, 46 changer transitions 0/180 dead transitions. [2024-06-20 17:18:40,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 180 transitions, 1801 flow [2024-06-20 17:18:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:18:40,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 17:18:40,919 INFO L175 Difference]: Start difference. First operand has 119 places, 134 transitions, 1201 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:18:40,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 180 transitions, 1801 flow [2024-06-20 17:18:40,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 180 transitions, 1732 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:18:40,965 INFO L231 Difference]: Finished difference. Result has 122 places, 136 transitions, 1318 flow [2024-06-20 17:18:40,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1318, PETRI_PLACES=122, PETRI_TRANSITIONS=136} [2024-06-20 17:18:40,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-20 17:18:40,965 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 136 transitions, 1318 flow [2024-06-20 17:18:40,966 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) [2024-06-20 17:18:40,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:40,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:40,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:18:40,966 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)] === [2024-06-20 17:18:40,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:40,966 INFO L85 PathProgramCache]: Analyzing trace with hash 557469015, now seen corresponding path program 1 times [2024-06-20 17:18:40,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:40,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345124991] [2024-06-20 17:18:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:40,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:42,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:42,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345124991] [2024-06-20 17:18:42,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345124991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:42,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:42,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:18:42,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113794280] [2024-06-20 17:18:42,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:42,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:18:42,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:42,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:18:42,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:18:42,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:42,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 136 transitions, 1318 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) [2024-06-20 17:18:42,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:42,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:42,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:43,899 INFO L124 PetriNetUnfolderBase]: 1790/2898 cut-off events. [2024-06-20 17:18:43,899 INFO L125 PetriNetUnfolderBase]: For 75324/75326 co-relation queries the response was YES. [2024-06-20 17:18:43,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18301 conditions, 2898 events. 1790/2898 cut-off events. For 75324/75326 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15791 event pairs, 424 based on Foata normal form. 2/2898 useless extension candidates. Maximal degree in co-relation 18249. Up to 2632 conditions per place. [2024-06-20 17:18:43,916 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 128 selfloop transitions, 30 changer transitions 0/163 dead transitions. [2024-06-20 17:18:43,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 163 transitions, 1836 flow [2024-06-20 17:18:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:18:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:18:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 17:18:43,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-20 17:18:43,918 INFO L175 Difference]: Start difference. First operand has 122 places, 136 transitions, 1318 flow. Second operand 6 states and 115 transitions. [2024-06-20 17:18:43,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 163 transitions, 1836 flow [2024-06-20 17:18:43,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 163 transitions, 1730 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:43,960 INFO L231 Difference]: Finished difference. Result has 122 places, 139 transitions, 1328 flow [2024-06-20 17:18:43,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1328, PETRI_PLACES=122, PETRI_TRANSITIONS=139} [2024-06-20 17:18:43,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-20 17:18:43,963 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 139 transitions, 1328 flow [2024-06-20 17:18:43,963 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) [2024-06-20 17:18:43,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:43,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:43,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:18:43,963 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)] === [2024-06-20 17:18:43,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:43,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1144809824, now seen corresponding path program 4 times [2024-06-20 17:18:43,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:43,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234204694] [2024-06-20 17:18:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:43,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:46,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:46,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234204694] [2024-06-20 17:18:46,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234204694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:46,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:46,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:46,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257258608] [2024-06-20 17:18:46,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:46,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:46,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:46,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:46,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:46,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:46,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 139 transitions, 1328 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) [2024-06-20 17:18:46,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:46,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:46,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:47,539 INFO L124 PetriNetUnfolderBase]: 1858/3014 cut-off events. [2024-06-20 17:18:47,539 INFO L125 PetriNetUnfolderBase]: For 84673/84673 co-relation queries the response was YES. [2024-06-20 17:18:47,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19101 conditions, 3014 events. 1858/3014 cut-off events. For 84673/84673 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16717 event pairs, 456 based on Foata normal form. 16/3019 useless extension candidates. Maximal degree in co-relation 19048. Up to 2596 conditions per place. [2024-06-20 17:18:47,558 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 127 selfloop transitions, 46 changer transitions 0/178 dead transitions. [2024-06-20 17:18:47,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 178 transitions, 1866 flow [2024-06-20 17:18:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:18:47,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:18:47,560 INFO L175 Difference]: Start difference. First operand has 122 places, 139 transitions, 1328 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:18:47,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 178 transitions, 1866 flow [2024-06-20 17:18:47,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 1808 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:47,611 INFO L231 Difference]: Finished difference. Result has 128 places, 140 transitions, 1421 flow [2024-06-20 17:18:47,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1421, PETRI_PLACES=128, PETRI_TRANSITIONS=140} [2024-06-20 17:18:47,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-20 17:18:47,612 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 140 transitions, 1421 flow [2024-06-20 17:18:47,612 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) [2024-06-20 17:18:47,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:47,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:47,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:18:47,613 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)] === [2024-06-20 17:18:47,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1346088936, now seen corresponding path program 5 times [2024-06-20 17:18:47,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:47,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482678697] [2024-06-20 17:18:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:47,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:50,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:50,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482678697] [2024-06-20 17:18:50,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482678697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:50,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:50,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:50,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976681041] [2024-06-20 17:18:50,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:50,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:50,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:50,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:50,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:50,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:50,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 140 transitions, 1421 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) [2024-06-20 17:18:50,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:50,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:50,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:51,548 INFO L124 PetriNetUnfolderBase]: 1906/3118 cut-off events. [2024-06-20 17:18:51,548 INFO L125 PetriNetUnfolderBase]: For 91753/91753 co-relation queries the response was YES. [2024-06-20 17:18:51,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19957 conditions, 3118 events. 1906/3118 cut-off events. For 91753/91753 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17568 event pairs, 443 based on Foata normal form. 12/3124 useless extension candidates. Maximal degree in co-relation 19903. Up to 2497 conditions per place. [2024-06-20 17:18:51,570 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-06-20 17:18:51,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 185 transitions, 2029 flow [2024-06-20 17:18:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:18:51,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 17:18:51,577 INFO L175 Difference]: Start difference. First operand has 128 places, 140 transitions, 1421 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:18:51,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 185 transitions, 2029 flow [2024-06-20 17:18:51,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 185 transitions, 1916 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 17:18:51,635 INFO L231 Difference]: Finished difference. Result has 130 places, 141 transitions, 1440 flow [2024-06-20 17:18:51,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1440, PETRI_PLACES=130, PETRI_TRANSITIONS=141} [2024-06-20 17:18:51,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-20 17:18:51,636 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 141 transitions, 1440 flow [2024-06-20 17:18:51,636 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) [2024-06-20 17:18:51,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:51,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:51,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:18:51,636 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)] === [2024-06-20 17:18:51,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:51,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1124443896, now seen corresponding path program 6 times [2024-06-20 17:18:51,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:51,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744744187] [2024-06-20 17:18:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:51,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:53,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:53,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744744187] [2024-06-20 17:18:53,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744744187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:53,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:53,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:53,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270538668] [2024-06-20 17:18:53,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:53,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:53,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:53,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:53,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:53,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:53,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 141 transitions, 1440 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) [2024-06-20 17:18:53,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:53,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:53,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:55,038 INFO L124 PetriNetUnfolderBase]: 2050/3360 cut-off events. [2024-06-20 17:18:55,038 INFO L125 PetriNetUnfolderBase]: For 108576/108576 co-relation queries the response was YES. [2024-06-20 17:18:55,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22274 conditions, 3360 events. 2050/3360 cut-off events. For 108576/108576 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19463 event pairs, 502 based on Foata normal form. 12/3361 useless extension candidates. Maximal degree in co-relation 22219. Up to 2699 conditions per place. [2024-06-20 17:18:55,065 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 66 changer transitions 0/186 dead transitions. [2024-06-20 17:18:55,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 186 transitions, 2194 flow [2024-06-20 17:18:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:18:55,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 17:18:55,067 INFO L175 Difference]: Start difference. First operand has 130 places, 141 transitions, 1440 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:18:55,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 186 transitions, 2194 flow [2024-06-20 17:18:55,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 186 transitions, 2104 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:55,235 INFO L231 Difference]: Finished difference. Result has 133 places, 143 transitions, 1598 flow [2024-06-20 17:18:55,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1598, PETRI_PLACES=133, PETRI_TRANSITIONS=143} [2024-06-20 17:18:55,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-20 17:18:55,236 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 143 transitions, 1598 flow [2024-06-20 17:18:55,236 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) [2024-06-20 17:18:55,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:55,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:55,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:18:55,236 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)] === [2024-06-20 17:18:55,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:55,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1776972496, now seen corresponding path program 7 times [2024-06-20 17:18:55,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:55,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611295661] [2024-06-20 17:18:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:55,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:57,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:57,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611295661] [2024-06-20 17:18:57,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611295661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:57,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:57,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:18:57,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566910520] [2024-06-20 17:18:57,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:57,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:18:57,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:18:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:18:57,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:57,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 143 transitions, 1598 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) [2024-06-20 17:18:57,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:57,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:57,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:58,868 INFO L124 PetriNetUnfolderBase]: 2022/3316 cut-off events. [2024-06-20 17:18:58,869 INFO L125 PetriNetUnfolderBase]: For 107768/107768 co-relation queries the response was YES. [2024-06-20 17:18:58,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21625 conditions, 3316 events. 2022/3316 cut-off events. For 107768/107768 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19124 event pairs, 504 based on Foata normal form. 16/3321 useless extension candidates. Maximal degree in co-relation 21569. Up to 2797 conditions per place. [2024-06-20 17:18:58,890 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 64 changer transitions 0/181 dead transitions. [2024-06-20 17:18:58,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 181 transitions, 2092 flow [2024-06-20 17:18:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:18:58,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:18:58,891 INFO L175 Difference]: Start difference. First operand has 133 places, 143 transitions, 1598 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:18:58,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 181 transitions, 2092 flow [2024-06-20 17:18:58,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 181 transitions, 1950 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:58,977 INFO L231 Difference]: Finished difference. Result has 136 places, 143 transitions, 1591 flow [2024-06-20 17:18:58,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1591, PETRI_PLACES=136, PETRI_TRANSITIONS=143} [2024-06-20 17:18:58,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-20 17:18:58,978 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 143 transitions, 1591 flow [2024-06-20 17:18:58,978 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) [2024-06-20 17:18:58,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:58,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:58,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:18:58,978 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)] === [2024-06-20 17:18:58,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1491635476, now seen corresponding path program 8 times [2024-06-20 17:18:58,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:58,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055736086] [2024-06-20 17:18:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:58,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:01,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055736086] [2024-06-20 17:19:01,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055736086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:01,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:01,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793229517] [2024-06-20 17:19:01,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:01,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:01,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:01,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:01,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:01,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 143 transitions, 1591 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) [2024-06-20 17:19:01,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:01,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:01,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:02,708 INFO L124 PetriNetUnfolderBase]: 2042/3376 cut-off events. [2024-06-20 17:19:02,708 INFO L125 PetriNetUnfolderBase]: For 104093/104093 co-relation queries the response was YES. [2024-06-20 17:19:02,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21674 conditions, 3376 events. 2042/3376 cut-off events. For 104093/104093 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19619 event pairs, 447 based on Foata normal form. 12/3382 useless extension candidates. Maximal degree in co-relation 21617. Up to 1883 conditions per place. [2024-06-20 17:19:02,731 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 122 selfloop transitions, 62 changer transitions 0/189 dead transitions. [2024-06-20 17:19:02,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 189 transitions, 2213 flow [2024-06-20 17:19:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:19:02,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 17:19:02,733 INFO L175 Difference]: Start difference. First operand has 136 places, 143 transitions, 1591 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:19:02,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 189 transitions, 2213 flow [2024-06-20 17:19:02,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 189 transitions, 2086 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:02,809 INFO L231 Difference]: Finished difference. Result has 138 places, 144 transitions, 1652 flow [2024-06-20 17:19:02,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1652, PETRI_PLACES=138, PETRI_TRANSITIONS=144} [2024-06-20 17:19:02,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-20 17:19:02,810 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 144 transitions, 1652 flow [2024-06-20 17:19:02,810 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) [2024-06-20 17:19:02,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:02,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:02,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:19:02,810 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)] === [2024-06-20 17:19:02,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:02,811 INFO L85 PathProgramCache]: Analyzing trace with hash -769989517, now seen corresponding path program 2 times [2024-06-20 17:19:02,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:02,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29386168] [2024-06-20 17:19:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:02,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:04,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:04,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29386168] [2024-06-20 17:19:04,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29386168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:04,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:04,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:19:04,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810055986] [2024-06-20 17:19:04,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:04,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:19:04,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:19:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:19:04,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:04,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 144 transitions, 1652 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) [2024-06-20 17:19:04,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:04,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:04,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:05,601 INFO L124 PetriNetUnfolderBase]: 2016/3332 cut-off events. [2024-06-20 17:19:05,601 INFO L125 PetriNetUnfolderBase]: For 105617/105617 co-relation queries the response was YES. [2024-06-20 17:19:05,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21516 conditions, 3332 events. 2016/3332 cut-off events. For 105617/105617 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19427 event pairs, 503 based on Foata normal form. 6/3327 useless extension candidates. Maximal degree in co-relation 21458. Up to 3053 conditions per place. [2024-06-20 17:19:05,640 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 125 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2024-06-20 17:19:05,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 159 transitions, 2026 flow [2024-06-20 17:19:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:19:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:19:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 17:19:05,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:19:05,650 INFO L175 Difference]: Start difference. First operand has 138 places, 144 transitions, 1652 flow. Second operand 6 states and 105 transitions. [2024-06-20 17:19:05,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 159 transitions, 2026 flow [2024-06-20 17:19:05,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 159 transitions, 1844 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:05,740 INFO L231 Difference]: Finished difference. Result has 137 places, 144 transitions, 1536 flow [2024-06-20 17:19:05,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1536, PETRI_PLACES=137, PETRI_TRANSITIONS=144} [2024-06-20 17:19:05,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-20 17:19:05,741 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 144 transitions, 1536 flow [2024-06-20 17:19:05,741 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) [2024-06-20 17:19:05,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:05,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:05,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:19:05,742 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:05,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1134917363, now seen corresponding path program 1 times [2024-06-20 17:19:05,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:05,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481627195] [2024-06-20 17:19:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:05,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:08,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:08,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481627195] [2024-06-20 17:19:08,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481627195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:08,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:08,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:19:08,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823794298] [2024-06-20 17:19:08,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:08,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:19:08,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:08,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:19:08,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:19:08,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:08,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 144 transitions, 1536 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) [2024-06-20 17:19:08,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:08,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:08,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:09,276 INFO L124 PetriNetUnfolderBase]: 2021/3349 cut-off events. [2024-06-20 17:19:09,276 INFO L125 PetriNetUnfolderBase]: For 101704/101706 co-relation queries the response was YES. [2024-06-20 17:19:09,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21173 conditions, 3349 events. 2021/3349 cut-off events. For 101704/101706 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19614 event pairs, 496 based on Foata normal form. 1/3348 useless extension candidates. Maximal degree in co-relation 21114. Up to 3178 conditions per place. [2024-06-20 17:19:09,299 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 146 selfloop transitions, 11 changer transitions 0/162 dead transitions. [2024-06-20 17:19:09,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 162 transitions, 1926 flow [2024-06-20 17:19:09,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:19:09,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:19:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-20 17:19:09,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 17:19:09,301 INFO L175 Difference]: Start difference. First operand has 137 places, 144 transitions, 1536 flow. Second operand 6 states and 100 transitions. [2024-06-20 17:19:09,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 162 transitions, 1926 flow [2024-06-20 17:19:09,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 162 transitions, 1838 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:09,428 INFO L231 Difference]: Finished difference. Result has 137 places, 147 transitions, 1516 flow [2024-06-20 17:19:09,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1516, PETRI_PLACES=137, PETRI_TRANSITIONS=147} [2024-06-20 17:19:09,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-20 17:19:09,429 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 147 transitions, 1516 flow [2024-06-20 17:19:09,429 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) [2024-06-20 17:19:09,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:09,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:09,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:19:09,429 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:09,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:09,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1130155763, now seen corresponding path program 2 times [2024-06-20 17:19:09,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:09,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716177061] [2024-06-20 17:19:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:09,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:11,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:11,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716177061] [2024-06-20 17:19:11,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716177061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:11,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:11,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:19:11,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538549995] [2024-06-20 17:19:11,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:11,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:19:11,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:19:11,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:19:11,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:11,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 147 transitions, 1516 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) [2024-06-20 17:19:11,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:11,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:11,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:12,083 INFO L124 PetriNetUnfolderBase]: 2018/3341 cut-off events. [2024-06-20 17:19:12,084 INFO L125 PetriNetUnfolderBase]: For 104402/104404 co-relation queries the response was YES. [2024-06-20 17:19:12,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21346 conditions, 3341 events. 2018/3341 cut-off events. For 104402/104404 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19597 event pairs, 496 based on Foata normal form. 1/3340 useless extension candidates. Maximal degree in co-relation 21286. Up to 3182 conditions per place. [2024-06-20 17:19:12,108 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 11 changer transitions 0/161 dead transitions. [2024-06-20 17:19:12,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 161 transitions, 1898 flow [2024-06-20 17:19:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:19:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:19:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-20 17:19:12,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:19:12,110 INFO L175 Difference]: Start difference. First operand has 137 places, 147 transitions, 1516 flow. Second operand 6 states and 96 transitions. [2024-06-20 17:19:12,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 161 transitions, 1898 flow [2024-06-20 17:19:12,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 161 transitions, 1852 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:12,213 INFO L231 Difference]: Finished difference. Result has 139 places, 150 transitions, 1544 flow [2024-06-20 17:19:12,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1544, PETRI_PLACES=139, PETRI_TRANSITIONS=150} [2024-06-20 17:19:12,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-20 17:19:12,214 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 150 transitions, 1544 flow [2024-06-20 17:19:12,214 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) [2024-06-20 17:19:12,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:12,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:12,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:19:12,215 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)] === [2024-06-20 17:19:12,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1032416480, now seen corresponding path program 1 times [2024-06-20 17:19:12,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:12,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421046545] [2024-06-20 17:19:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:12,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:14,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:14,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421046545] [2024-06-20 17:19:14,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421046545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:14,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:14,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:14,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262381434] [2024-06-20 17:19:14,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:14,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:14,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:14,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:14,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:14,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:14,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 150 transitions, 1544 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) [2024-06-20 17:19:14,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:14,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:14,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:15,581 INFO L124 PetriNetUnfolderBase]: 2066/3428 cut-off events. [2024-06-20 17:19:15,581 INFO L125 PetriNetUnfolderBase]: For 118785/118785 co-relation queries the response was YES. [2024-06-20 17:19:15,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22283 conditions, 3428 events. 2066/3428 cut-off events. For 118785/118785 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20040 event pairs, 365 based on Foata normal form. 12/3438 useless extension candidates. Maximal degree in co-relation 22222. Up to 3039 conditions per place. [2024-06-20 17:19:15,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 168 selfloop transitions, 25 changer transitions 0/198 dead transitions. [2024-06-20 17:19:15,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 198 transitions, 2138 flow [2024-06-20 17:19:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:19:15,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:19:15,608 INFO L175 Difference]: Start difference. First operand has 139 places, 150 transitions, 1544 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:19:15,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 198 transitions, 2138 flow [2024-06-20 17:19:15,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 2086 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:15,688 INFO L231 Difference]: Finished difference. Result has 144 places, 151 transitions, 1608 flow [2024-06-20 17:19:15,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1608, PETRI_PLACES=144, PETRI_TRANSITIONS=151} [2024-06-20 17:19:15,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-20 17:19:15,688 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 151 transitions, 1608 flow [2024-06-20 17:19:15,689 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) [2024-06-20 17:19:15,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:15,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:15,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:19:15,689 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:15,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:15,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1028755070, now seen corresponding path program 2 times [2024-06-20 17:19:15,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:15,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34269644] [2024-06-20 17:19:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:15,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:18,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:18,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34269644] [2024-06-20 17:19:18,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34269644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:18,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:18,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:19:18,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218775730] [2024-06-20 17:19:18,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:18,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:19:18,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:18,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:19:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:19:18,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:18,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 151 transitions, 1608 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) [2024-06-20 17:19:18,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:18,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:18,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:19,603 INFO L124 PetriNetUnfolderBase]: 2046/3396 cut-off events. [2024-06-20 17:19:19,603 INFO L125 PetriNetUnfolderBase]: For 117077/117077 co-relation queries the response was YES. [2024-06-20 17:19:19,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21859 conditions, 3396 events. 2046/3396 cut-off events. For 117077/117077 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19986 event pairs, 466 based on Foata normal form. 12/3406 useless extension candidates. Maximal degree in co-relation 21797. Up to 3033 conditions per place. [2024-06-20 17:19:19,626 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 162 selfloop transitions, 29 changer transitions 0/196 dead transitions. [2024-06-20 17:19:19,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 196 transitions, 2076 flow [2024-06-20 17:19:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:19:19,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:19:19,628 INFO L175 Difference]: Start difference. First operand has 144 places, 151 transitions, 1608 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:19:19,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 196 transitions, 2076 flow [2024-06-20 17:19:19,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 196 transitions, 1988 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:19,735 INFO L231 Difference]: Finished difference. Result has 145 places, 150 transitions, 1520 flow [2024-06-20 17:19:19,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1520, PETRI_PLACES=145, PETRI_TRANSITIONS=150} [2024-06-20 17:19:19,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-20 17:19:19,735 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 150 transitions, 1520 flow [2024-06-20 17:19:19,736 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) [2024-06-20 17:19:19,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:19,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:19,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:19:19,736 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)] === [2024-06-20 17:19:19,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:19,736 INFO L85 PathProgramCache]: Analyzing trace with hash -822787743, now seen corresponding path program 1 times [2024-06-20 17:19:19,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:19,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108547812] [2024-06-20 17:19:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:19,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:22,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:22,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108547812] [2024-06-20 17:19:22,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108547812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:22,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:22,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:22,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261581287] [2024-06-20 17:19:22,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:22,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:22,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:22,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:22,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:22,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 150 transitions, 1520 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) [2024-06-20 17:19:22,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:22,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:22,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:23,110 INFO L124 PetriNetUnfolderBase]: 2059/3411 cut-off events. [2024-06-20 17:19:23,110 INFO L125 PetriNetUnfolderBase]: For 115613/115615 co-relation queries the response was YES. [2024-06-20 17:19:23,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21941 conditions, 3411 events. 2059/3411 cut-off events. For 115613/115615 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20063 event pairs, 494 based on Foata normal form. 1/3410 useless extension candidates. Maximal degree in co-relation 21878. Up to 3223 conditions per place. [2024-06-20 17:19:23,133 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 150 selfloop transitions, 22 changer transitions 0/177 dead transitions. [2024-06-20 17:19:23,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 177 transitions, 2088 flow [2024-06-20 17:19:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:19:23,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:19:23,135 INFO L175 Difference]: Start difference. First operand has 145 places, 150 transitions, 1520 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:19:23,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 177 transitions, 2088 flow [2024-06-20 17:19:23,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 177 transitions, 1943 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-20 17:19:23,209 INFO L231 Difference]: Finished difference. Result has 144 places, 156 transitions, 1523 flow [2024-06-20 17:19:23,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1523, PETRI_PLACES=144, PETRI_TRANSITIONS=156} [2024-06-20 17:19:23,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-20 17:19:23,210 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 156 transitions, 1523 flow [2024-06-20 17:19:23,210 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) [2024-06-20 17:19:23,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:23,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:23,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:19:23,211 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:23,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:23,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1894839990, now seen corresponding path program 1 times [2024-06-20 17:19:23,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:23,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605952299] [2024-06-20 17:19:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:23,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:25,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:25,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605952299] [2024-06-20 17:19:25,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605952299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:25,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:25,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:25,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535014467] [2024-06-20 17:19:25,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:25,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:25,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:25,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:25,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:25,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:25,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 156 transitions, 1523 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) [2024-06-20 17:19:25,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:25,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:25,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:26,823 INFO L124 PetriNetUnfolderBase]: 2129/3511 cut-off events. [2024-06-20 17:19:26,824 INFO L125 PetriNetUnfolderBase]: For 124596/124596 co-relation queries the response was YES. [2024-06-20 17:19:26,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22694 conditions, 3511 events. 2129/3511 cut-off events. For 124596/124596 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20644 event pairs, 489 based on Foata normal form. 6/3511 useless extension candidates. Maximal degree in co-relation 22631. Up to 3219 conditions per place. [2024-06-20 17:19:26,850 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 148 selfloop transitions, 34 changer transitions 0/187 dead transitions. [2024-06-20 17:19:26,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 187 transitions, 2181 flow [2024-06-20 17:19:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:19:26,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 17:19:26,851 INFO L175 Difference]: Start difference. First operand has 144 places, 156 transitions, 1523 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:19:26,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 187 transitions, 2181 flow [2024-06-20 17:19:26,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 187 transitions, 2123 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:26,942 INFO L231 Difference]: Finished difference. Result has 149 places, 166 transitions, 1723 flow [2024-06-20 17:19:26,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1723, PETRI_PLACES=149, PETRI_TRANSITIONS=166} [2024-06-20 17:19:26,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-20 17:19:26,942 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 166 transitions, 1723 flow [2024-06-20 17:19:26,943 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) [2024-06-20 17:19:26,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:26,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:26,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:19:26,943 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)] === [2024-06-20 17:19:26,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash 986979587, now seen corresponding path program 2 times [2024-06-20 17:19:26,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:26,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897174492] [2024-06-20 17:19:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:26,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:29,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897174492] [2024-06-20 17:19:29,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897174492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:29,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:29,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:29,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40348907] [2024-06-20 17:19:29,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:29,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:29,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:29,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:29,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:29,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:29,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 166 transitions, 1723 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) [2024-06-20 17:19:29,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:29,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:29,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:30,881 INFO L124 PetriNetUnfolderBase]: 2126/3509 cut-off events. [2024-06-20 17:19:30,881 INFO L125 PetriNetUnfolderBase]: For 128834/128836 co-relation queries the response was YES. [2024-06-20 17:19:30,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23496 conditions, 3509 events. 2126/3509 cut-off events. For 128834/128836 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20617 event pairs, 499 based on Foata normal form. 1/3508 useless extension candidates. Maximal degree in co-relation 23430. Up to 3329 conditions per place. [2024-06-20 17:19:30,908 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 161 selfloop transitions, 19 changer transitions 0/185 dead transitions. [2024-06-20 17:19:30,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 185 transitions, 2183 flow [2024-06-20 17:19:30,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:30,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 17:19:30,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-20 17:19:30,910 INFO L175 Difference]: Start difference. First operand has 149 places, 166 transitions, 1723 flow. Second operand 7 states and 113 transitions. [2024-06-20 17:19:30,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 185 transitions, 2183 flow [2024-06-20 17:19:31,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 185 transitions, 2075 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:31,017 INFO L231 Difference]: Finished difference. Result has 153 places, 169 transitions, 1721 flow [2024-06-20 17:19:31,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1721, PETRI_PLACES=153, PETRI_TRANSITIONS=169} [2024-06-20 17:19:31,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-20 17:19:31,018 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 169 transitions, 1721 flow [2024-06-20 17:19:31,018 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) [2024-06-20 17:19:31,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:31,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:31,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:19:31,019 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)] === [2024-06-20 17:19:31,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:31,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2006534566, now seen corresponding path program 2 times [2024-06-20 17:19:31,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:31,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270709293] [2024-06-20 17:19:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:31,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:32,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:32,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270709293] [2024-06-20 17:19:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270709293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:32,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025860767] [2024-06-20 17:19:32,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:32,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:32,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:32,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 169 transitions, 1721 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) [2024-06-20 17:19:32,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:32,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:32,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:33,943 INFO L124 PetriNetUnfolderBase]: 2156/3539 cut-off events. [2024-06-20 17:19:33,944 INFO L125 PetriNetUnfolderBase]: For 138965/138965 co-relation queries the response was YES. [2024-06-20 17:19:33,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23968 conditions, 3539 events. 2156/3539 cut-off events. For 138965/138965 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20695 event pairs, 500 based on Foata normal form. 6/3534 useless extension candidates. Maximal degree in co-relation 23900. Up to 3261 conditions per place. [2024-06-20 17:19:33,971 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 34 changer transitions 0/196 dead transitions. [2024-06-20 17:19:33,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 196 transitions, 2308 flow [2024-06-20 17:19:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 17:19:33,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-20 17:19:33,973 INFO L175 Difference]: Start difference. First operand has 153 places, 169 transitions, 1721 flow. Second operand 7 states and 117 transitions. [2024-06-20 17:19:33,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 196 transitions, 2308 flow [2024-06-20 17:19:34,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 196 transitions, 2224 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:34,071 INFO L231 Difference]: Finished difference. Result has 157 places, 180 transitions, 1874 flow [2024-06-20 17:19:34,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1874, PETRI_PLACES=157, PETRI_TRANSITIONS=180} [2024-06-20 17:19:34,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-20 17:19:34,072 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 180 transitions, 1874 flow [2024-06-20 17:19:34,072 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) [2024-06-20 17:19:34,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:34,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:19:34,072 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)] === [2024-06-20 17:19:34,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1900346520, now seen corresponding path program 3 times [2024-06-20 17:19:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:34,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156019316] [2024-06-20 17:19:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:35,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:35,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156019316] [2024-06-20 17:19:35,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156019316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:35,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:35,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:35,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13556414] [2024-06-20 17:19:35,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:35,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:35,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:35,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:35,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:35,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 180 transitions, 1874 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) [2024-06-20 17:19:35,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:35,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:35,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:37,084 INFO L124 PetriNetUnfolderBase]: 2210/3619 cut-off events. [2024-06-20 17:19:37,085 INFO L125 PetriNetUnfolderBase]: For 149969/149969 co-relation queries the response was YES. [2024-06-20 17:19:37,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25587 conditions, 3619 events. 2210/3619 cut-off events. For 149969/149969 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21221 event pairs, 501 based on Foata normal form. 6/3614 useless extension candidates. Maximal degree in co-relation 25516. Up to 3221 conditions per place. [2024-06-20 17:19:37,114 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 159 selfloop transitions, 43 changer transitions 0/207 dead transitions. [2024-06-20 17:19:37,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 207 transitions, 2644 flow [2024-06-20 17:19:37,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:19:37,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:19:37,115 INFO L175 Difference]: Start difference. First operand has 157 places, 180 transitions, 1874 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:19:37,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 207 transitions, 2644 flow [2024-06-20 17:19:37,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 207 transitions, 2546 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:37,235 INFO L231 Difference]: Finished difference. Result has 162 places, 188 transitions, 2054 flow [2024-06-20 17:19:37,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2054, PETRI_PLACES=162, PETRI_TRANSITIONS=188} [2024-06-20 17:19:37,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-20 17:19:37,236 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 188 transitions, 2054 flow [2024-06-20 17:19:37,236 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) [2024-06-20 17:19:37,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:37,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:37,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:19:37,236 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)] === [2024-06-20 17:19:37,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:37,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1900346365, now seen corresponding path program 3 times [2024-06-20 17:19:37,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:37,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664244645] [2024-06-20 17:19:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:37,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:39,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:39,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664244645] [2024-06-20 17:19:39,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664244645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:39,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:39,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:39,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475484800] [2024-06-20 17:19:39,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:39,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:39,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:39,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:39,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:39,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 188 transitions, 2054 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) [2024-06-20 17:19:39,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:39,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:39,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:40,590 INFO L124 PetriNetUnfolderBase]: 2207/3625 cut-off events. [2024-06-20 17:19:40,590 INFO L125 PetriNetUnfolderBase]: For 153714/153716 co-relation queries the response was YES. [2024-06-20 17:19:40,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26123 conditions, 3625 events. 2207/3625 cut-off events. For 153714/153716 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 21300 event pairs, 491 based on Foata normal form. 1/3624 useless extension candidates. Maximal degree in co-relation 26050. Up to 3457 conditions per place. [2024-06-20 17:19:40,620 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 14 changer transitions 0/200 dead transitions. [2024-06-20 17:19:40,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 200 transitions, 2476 flow [2024-06-20 17:19:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-20 17:19:40,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-20 17:19:40,622 INFO L175 Difference]: Start difference. First operand has 162 places, 188 transitions, 2054 flow. Second operand 7 states and 107 transitions. [2024-06-20 17:19:40,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 200 transitions, 2476 flow [2024-06-20 17:19:40,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 200 transitions, 2331 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:40,735 INFO L231 Difference]: Finished difference. Result has 166 places, 188 transitions, 1943 flow [2024-06-20 17:19:40,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1943, PETRI_PLACES=166, PETRI_TRANSITIONS=188} [2024-06-20 17:19:40,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-20 17:19:40,736 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 188 transitions, 1943 flow [2024-06-20 17:19:40,736 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) [2024-06-20 17:19:40,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:40,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:40,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:19:40,736 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)] === [2024-06-20 17:19:40,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash -674872452, now seen corresponding path program 1 times [2024-06-20 17:19:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284493649] [2024-06-20 17:19:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:40,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:43,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:43,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284493649] [2024-06-20 17:19:43,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284493649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:43,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:43,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:43,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29217974] [2024-06-20 17:19:43,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:43,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:43,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:43,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:43,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 188 transitions, 1943 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) [2024-06-20 17:19:43,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:43,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:43,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:44,742 INFO L124 PetriNetUnfolderBase]: 2246/3672 cut-off events. [2024-06-20 17:19:44,742 INFO L125 PetriNetUnfolderBase]: For 167122/167122 co-relation queries the response was YES. [2024-06-20 17:19:44,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26161 conditions, 3672 events. 2246/3672 cut-off events. For 167122/167122 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 21451 event pairs, 503 based on Foata normal form. 14/3675 useless extension candidates. Maximal degree in co-relation 26086. Up to 3337 conditions per place. [2024-06-20 17:19:44,774 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 168 selfloop transitions, 37 changer transitions 0/210 dead transitions. [2024-06-20 17:19:44,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 210 transitions, 2529 flow [2024-06-20 17:19:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:19:44,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:19:44,776 INFO L175 Difference]: Start difference. First operand has 166 places, 188 transitions, 1943 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:19:44,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 210 transitions, 2529 flow [2024-06-20 17:19:44,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 210 transitions, 2493 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:44,916 INFO L231 Difference]: Finished difference. Result has 167 places, 190 transitions, 2032 flow [2024-06-20 17:19:44,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2032, PETRI_PLACES=167, PETRI_TRANSITIONS=190} [2024-06-20 17:19:44,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-20 17:19:44,916 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 190 transitions, 2032 flow [2024-06-20 17:19:44,917 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) [2024-06-20 17:19:44,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:44,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:44,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:19:44,917 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)] === [2024-06-20 17:19:44,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:44,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1474548492, now seen corresponding path program 1 times [2024-06-20 17:19:44,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:44,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22040324] [2024-06-20 17:19:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:44,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:47,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:47,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22040324] [2024-06-20 17:19:47,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22040324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:47,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:47,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:47,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122883824] [2024-06-20 17:19:47,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:47,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:47,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:47,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:47,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:47,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:47,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 190 transitions, 2032 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) [2024-06-20 17:19:47,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:47,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:47,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:48,067 INFO L124 PetriNetUnfolderBase]: 2256/3715 cut-off events. [2024-06-20 17:19:48,067 INFO L125 PetriNetUnfolderBase]: For 161431/161431 co-relation queries the response was YES. [2024-06-20 17:19:48,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26688 conditions, 3715 events. 2256/3715 cut-off events. For 161431/161431 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21942 event pairs, 487 based on Foata normal form. 2/3715 useless extension candidates. Maximal degree in co-relation 26612. Up to 3481 conditions per place. [2024-06-20 17:19:48,099 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 194 selfloop transitions, 20 changer transitions 0/219 dead transitions. [2024-06-20 17:19:48,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 219 transitions, 2611 flow [2024-06-20 17:19:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:19:48,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:19:48,102 INFO L175 Difference]: Start difference. First operand has 167 places, 190 transitions, 2032 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:19:48,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 219 transitions, 2611 flow [2024-06-20 17:19:48,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 219 transitions, 2512 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:48,226 INFO L231 Difference]: Finished difference. Result has 169 places, 194 transitions, 2064 flow [2024-06-20 17:19:48,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2064, PETRI_PLACES=169, PETRI_TRANSITIONS=194} [2024-06-20 17:19:48,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-20 17:19:48,227 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 194 transitions, 2064 flow [2024-06-20 17:19:48,227 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) [2024-06-20 17:19:48,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:48,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:48,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:19:48,228 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)] === [2024-06-20 17:19:48,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1596375564, now seen corresponding path program 2 times [2024-06-20 17:19:48,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:48,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813894529] [2024-06-20 17:19:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:48,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:50,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:50,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813894529] [2024-06-20 17:19:50,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813894529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:50,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:50,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:50,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338585825] [2024-06-20 17:19:50,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:50,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:50,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:50,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:50,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 194 transitions, 2064 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) [2024-06-20 17:19:50,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:50,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:50,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:51,628 INFO L124 PetriNetUnfolderBase]: 2266/3710 cut-off events. [2024-06-20 17:19:51,628 INFO L125 PetriNetUnfolderBase]: For 167958/167960 co-relation queries the response was YES. [2024-06-20 17:19:51,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26770 conditions, 3710 events. 2266/3710 cut-off events. For 167958/167960 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21833 event pairs, 495 based on Foata normal form. 2/3710 useless extension candidates. Maximal degree in co-relation 26693. Up to 3415 conditions per place. [2024-06-20 17:19:51,673 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 38 changer transitions 0/220 dead transitions. [2024-06-20 17:19:51,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 220 transitions, 2688 flow [2024-06-20 17:19:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:19:51,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:19:51,675 INFO L175 Difference]: Start difference. First operand has 169 places, 194 transitions, 2064 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:19:51,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 220 transitions, 2688 flow [2024-06-20 17:19:51,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 220 transitions, 2600 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:51,895 INFO L231 Difference]: Finished difference. Result has 171 places, 197 transitions, 2134 flow [2024-06-20 17:19:51,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2134, PETRI_PLACES=171, PETRI_TRANSITIONS=197} [2024-06-20 17:19:51,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-20 17:19:51,896 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 197 transitions, 2134 flow [2024-06-20 17:19:51,896 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) [2024-06-20 17:19:51,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:51,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:51,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:19:51,897 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)] === [2024-06-20 17:19:51,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:51,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1389899754, now seen corresponding path program 3 times [2024-06-20 17:19:51,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:51,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679857424] [2024-06-20 17:19:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:51,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:54,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:54,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679857424] [2024-06-20 17:19:54,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679857424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:54,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:54,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:54,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605775936] [2024-06-20 17:19:54,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:54,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:54,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:54,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:54,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:54,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:54,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 197 transitions, 2134 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) [2024-06-20 17:19:54,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:54,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:54,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:55,319 INFO L124 PetriNetUnfolderBase]: 2328/3811 cut-off events. [2024-06-20 17:19:55,319 INFO L125 PetriNetUnfolderBase]: For 182449/182449 co-relation queries the response was YES. [2024-06-20 17:19:55,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28149 conditions, 3811 events. 2328/3811 cut-off events. For 182449/182449 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22530 event pairs, 521 based on Foata normal form. 2/3802 useless extension candidates. Maximal degree in co-relation 28071. Up to 3291 conditions per place. [2024-06-20 17:19:55,354 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 167 selfloop transitions, 62 changer transitions 0/234 dead transitions. [2024-06-20 17:19:55,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 234 transitions, 3110 flow [2024-06-20 17:19:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 17:19:55,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-20 17:19:55,356 INFO L175 Difference]: Start difference. First operand has 171 places, 197 transitions, 2134 flow. Second operand 7 states and 131 transitions. [2024-06-20 17:19:55,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 234 transitions, 3110 flow [2024-06-20 17:19:55,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 234 transitions, 2992 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:55,525 INFO L231 Difference]: Finished difference. Result has 174 places, 207 transitions, 2383 flow [2024-06-20 17:19:55,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2383, PETRI_PLACES=174, PETRI_TRANSITIONS=207} [2024-06-20 17:19:55,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-20 17:19:55,526 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 207 transitions, 2383 flow [2024-06-20 17:19:55,526 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) [2024-06-20 17:19:55,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:55,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:55,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:19:55,527 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)] === [2024-06-20 17:19:55,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:55,527 INFO L85 PathProgramCache]: Analyzing trace with hash 834618426, now seen corresponding path program 4 times [2024-06-20 17:19:55,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:55,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731070033] [2024-06-20 17:19:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:55,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:57,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:57,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731070033] [2024-06-20 17:19:57,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731070033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:57,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:57,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:57,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188669071] [2024-06-20 17:19:57,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:57,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:57,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:57,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:57,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:57,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:57,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 207 transitions, 2383 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) [2024-06-20 17:19:57,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:57,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:57,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:58,790 INFO L124 PetriNetUnfolderBase]: 2315/3791 cut-off events. [2024-06-20 17:19:58,790 INFO L125 PetriNetUnfolderBase]: For 186703/186703 co-relation queries the response was YES. [2024-06-20 17:19:58,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28241 conditions, 3791 events. 2315/3791 cut-off events. For 186703/186703 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22364 event pairs, 514 based on Foata normal form. 3/3788 useless extension candidates. Maximal degree in co-relation 28161. Up to 3485 conditions per place. [2024-06-20 17:19:58,822 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 183 selfloop transitions, 39 changer transitions 0/227 dead transitions. [2024-06-20 17:19:58,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 227 transitions, 2895 flow [2024-06-20 17:19:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:19:58,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 17:19:58,823 INFO L175 Difference]: Start difference. First operand has 174 places, 207 transitions, 2383 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:19:58,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 227 transitions, 2895 flow [2024-06-20 17:19:59,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 227 transitions, 2780 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-20 17:19:59,002 INFO L231 Difference]: Finished difference. Result has 179 places, 207 transitions, 2354 flow [2024-06-20 17:19:59,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2268, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2354, PETRI_PLACES=179, PETRI_TRANSITIONS=207} [2024-06-20 17:19:59,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-20 17:19:59,003 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 207 transitions, 2354 flow [2024-06-20 17:19:59,003 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) [2024-06-20 17:19:59,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:59,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:59,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:19:59,004 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)] === [2024-06-20 17:19:59,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:59,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1747805714, now seen corresponding path program 5 times [2024-06-20 17:19:59,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:59,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024153130] [2024-06-20 17:19:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:59,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:01,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:01,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024153130] [2024-06-20 17:20:01,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024153130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:01,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:01,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:20:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119009442] [2024-06-20 17:20:01,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:01,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:20:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:01,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:20:01,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:20:01,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:01,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 207 transitions, 2354 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) [2024-06-20 17:20:01,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:01,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:01,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:02,519 INFO L124 PetriNetUnfolderBase]: 2400/3908 cut-off events. [2024-06-20 17:20:02,520 INFO L125 PetriNetUnfolderBase]: For 204082/204082 co-relation queries the response was YES. [2024-06-20 17:20:02,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29465 conditions, 3908 events. 2400/3908 cut-off events. For 204082/204082 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23009 event pairs, 504 based on Foata normal form. 6/3903 useless extension candidates. Maximal degree in co-relation 29383. Up to 3508 conditions per place. [2024-06-20 17:20:02,550 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 191 selfloop transitions, 56 changer transitions 0/252 dead transitions. [2024-06-20 17:20:02,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 252 transitions, 3469 flow [2024-06-20 17:20:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:02,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:20:02,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 17:20:02,552 INFO L175 Difference]: Start difference. First operand has 179 places, 207 transitions, 2354 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:20:02,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 252 transitions, 3469 flow [2024-06-20 17:20:02,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 252 transitions, 3343 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:02,764 INFO L231 Difference]: Finished difference. Result has 184 places, 228 transitions, 2733 flow [2024-06-20 17:20:02,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2733, PETRI_PLACES=184, PETRI_TRANSITIONS=228} [2024-06-20 17:20:02,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-20 17:20:02,765 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 228 transitions, 2733 flow [2024-06-20 17:20:02,765 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) [2024-06-20 17:20:02,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:02,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:02,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:20:02,766 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)] === [2024-06-20 17:20:02,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:02,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1218811374, now seen corresponding path program 6 times [2024-06-20 17:20:02,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:02,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225331057] [2024-06-20 17:20:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:02,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:04,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:04,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225331057] [2024-06-20 17:20:04,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225331057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:04,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:04,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:20:04,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335831834] [2024-06-20 17:20:04,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:04,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:20:04,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:20:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:20:04,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:04,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 228 transitions, 2733 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) [2024-06-20 17:20:04,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:04,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:04,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:06,072 INFO L124 PetriNetUnfolderBase]: 2388/3906 cut-off events. [2024-06-20 17:20:06,073 INFO L125 PetriNetUnfolderBase]: For 209334/209334 co-relation queries the response was YES. [2024-06-20 17:20:06,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30183 conditions, 3906 events. 2388/3906 cut-off events. For 209334/209334 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23124 event pairs, 509 based on Foata normal form. 8/3903 useless extension candidates. Maximal degree in co-relation 30098. Up to 3442 conditions per place. [2024-06-20 17:20:06,117 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 67 changer transitions 0/255 dead transitions. [2024-06-20 17:20:06,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 255 transitions, 3623 flow [2024-06-20 17:20:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:20:06,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:20:06,119 INFO L175 Difference]: Start difference. First operand has 184 places, 228 transitions, 2733 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:20:06,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 255 transitions, 3623 flow [2024-06-20 17:20:06,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 255 transitions, 3324 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:06,447 INFO L231 Difference]: Finished difference. Result has 186 places, 232 transitions, 2745 flow [2024-06-20 17:20:06,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2745, PETRI_PLACES=186, PETRI_TRANSITIONS=232} [2024-06-20 17:20:06,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-20 17:20:06,448 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 232 transitions, 2745 flow [2024-06-20 17:20:06,448 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) [2024-06-20 17:20:06,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:06,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:06,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:20:06,448 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)] === [2024-06-20 17:20:06,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash 528741548, now seen corresponding path program 1 times [2024-06-20 17:20:06,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:06,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24556453] [2024-06-20 17:20:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:06,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:08,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:08,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24556453] [2024-06-20 17:20:08,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24556453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:08,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:08,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:08,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328904154] [2024-06-20 17:20:08,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:08,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:08,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:08,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:08,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:08,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:08,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 232 transitions, 2745 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) [2024-06-20 17:20:08,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:08,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:08,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:10,140 INFO L124 PetriNetUnfolderBase]: 2409/3941 cut-off events. [2024-06-20 17:20:10,140 INFO L125 PetriNetUnfolderBase]: For 212077/212079 co-relation queries the response was YES. [2024-06-20 17:20:10,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30557 conditions, 3941 events. 2409/3941 cut-off events. For 212077/212079 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23335 event pairs, 475 based on Foata normal form. 2/3941 useless extension candidates. Maximal degree in co-relation 30470. Up to 3687 conditions per place. [2024-06-20 17:20:10,180 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 27 changer transitions 0/264 dead transitions. [2024-06-20 17:20:10,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 264 transitions, 3543 flow [2024-06-20 17:20:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:20:10,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:20:10,190 INFO L175 Difference]: Start difference. First operand has 186 places, 232 transitions, 2745 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:20:10,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 264 transitions, 3543 flow [2024-06-20 17:20:10,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 264 transitions, 3407 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 17:20:10,429 INFO L231 Difference]: Finished difference. Result has 190 places, 236 transitions, 2776 flow [2024-06-20 17:20:10,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2609, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2776, PETRI_PLACES=190, PETRI_TRANSITIONS=236} [2024-06-20 17:20:10,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-20 17:20:10,430 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 236 transitions, 2776 flow [2024-06-20 17:20:10,435 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) [2024-06-20 17:20:10,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:10,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:10,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:20:10,435 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)] === [2024-06-20 17:20:10,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:10,436 INFO L85 PathProgramCache]: Analyzing trace with hash 376295314, now seen corresponding path program 1 times [2024-06-20 17:20:10,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:10,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126025393] [2024-06-20 17:20:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:10,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:12,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126025393] [2024-06-20 17:20:12,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126025393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:12,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:12,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:12,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486863764] [2024-06-20 17:20:12,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:12,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:12,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:12,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:12,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:12,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:12,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 236 transitions, 2776 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) [2024-06-20 17:20:12,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:12,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:12,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:14,387 INFO L124 PetriNetUnfolderBase]: 2497/4067 cut-off events. [2024-06-20 17:20:14,388 INFO L125 PetriNetUnfolderBase]: For 231940/231940 co-relation queries the response was YES. [2024-06-20 17:20:14,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32115 conditions, 4067 events. 2497/4067 cut-off events. For 231940/231940 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 24074 event pairs, 507 based on Foata normal form. 4/4065 useless extension candidates. Maximal degree in co-relation 32027. Up to 3556 conditions per place. [2024-06-20 17:20:14,421 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 238 selfloop transitions, 70 changer transitions 0/313 dead transitions. [2024-06-20 17:20:14,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 313 transitions, 4515 flow [2024-06-20 17:20:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:20:14,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:20:14,423 INFO L175 Difference]: Start difference. First operand has 190 places, 236 transitions, 2776 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:20:14,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 313 transitions, 4515 flow [2024-06-20 17:20:14,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 313 transitions, 4427 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-20 17:20:14,728 INFO L231 Difference]: Finished difference. Result has 197 places, 273 transitions, 3538 flow [2024-06-20 17:20:14,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3538, PETRI_PLACES=197, PETRI_TRANSITIONS=273} [2024-06-20 17:20:14,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-20 17:20:14,728 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 273 transitions, 3538 flow [2024-06-20 17:20:14,728 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) [2024-06-20 17:20:14,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:14,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:14,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:20:14,729 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)] === [2024-06-20 17:20:14,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:14,729 INFO L85 PathProgramCache]: Analyzing trace with hash 263386126, now seen corresponding path program 2 times [2024-06-20 17:20:14,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:14,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332483920] [2024-06-20 17:20:14,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:14,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:17,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:17,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332483920] [2024-06-20 17:20:17,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332483920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:17,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:17,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:17,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402515463] [2024-06-20 17:20:17,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:17,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:17,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:17,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:17,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:17,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 273 transitions, 3538 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) [2024-06-20 17:20:17,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:17,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:17,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:18,538 INFO L124 PetriNetUnfolderBase]: 2505/4079 cut-off events. [2024-06-20 17:20:18,538 INFO L125 PetriNetUnfolderBase]: For 241599/241601 co-relation queries the response was YES. [2024-06-20 17:20:18,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33279 conditions, 4079 events. 2505/4079 cut-off events. For 241599/241601 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24119 event pairs, 506 based on Foata normal form. 2/4079 useless extension candidates. Maximal degree in co-relation 33186. Up to 3856 conditions per place. [2024-06-20 17:20:18,580 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 268 selfloop transitions, 24 changer transitions 0/297 dead transitions. [2024-06-20 17:20:18,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 297 transitions, 4224 flow [2024-06-20 17:20:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:20:18,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 17:20:18,581 INFO L175 Difference]: Start difference. First operand has 197 places, 273 transitions, 3538 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:20:18,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 297 transitions, 4224 flow [2024-06-20 17:20:18,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 297 transitions, 4106 flow, removed 58 selfloop flow, removed 1 redundant places. [2024-06-20 17:20:18,955 INFO L231 Difference]: Finished difference. Result has 204 places, 275 transitions, 3519 flow [2024-06-20 17:20:18,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3519, PETRI_PLACES=204, PETRI_TRANSITIONS=275} [2024-06-20 17:20:18,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-20 17:20:18,956 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 275 transitions, 3519 flow [2024-06-20 17:20:18,956 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) [2024-06-20 17:20:18,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:18,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:18,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:20:18,956 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)] === [2024-06-20 17:20:18,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:18,957 INFO L85 PathProgramCache]: Analyzing trace with hash 266182760, now seen corresponding path program 2 times [2024-06-20 17:20:18,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:18,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681190631] [2024-06-20 17:20:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:18,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:22,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:22,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681190631] [2024-06-20 17:20:22,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681190631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:22,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:22,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:22,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145426420] [2024-06-20 17:20:22,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:22,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:22,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:22,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:22,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:22,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:22,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 275 transitions, 3519 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) [2024-06-20 17:20:22,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:22,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:22,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:23,255 INFO L124 PetriNetUnfolderBase]: 2535/4124 cut-off events. [2024-06-20 17:20:23,256 INFO L125 PetriNetUnfolderBase]: For 252547/252547 co-relation queries the response was YES. [2024-06-20 17:20:23,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33547 conditions, 4124 events. 2535/4124 cut-off events. For 252547/252547 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24429 event pairs, 495 based on Foata normal form. 6/4124 useless extension candidates. Maximal degree in co-relation 33451. Up to 3734 conditions per place. [2024-06-20 17:20:23,299 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 252 selfloop transitions, 53 changer transitions 0/310 dead transitions. [2024-06-20 17:20:23,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 310 transitions, 4585 flow [2024-06-20 17:20:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:20:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:20:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:20:23,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:20:23,301 INFO L175 Difference]: Start difference. First operand has 204 places, 275 transitions, 3519 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:20:23,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 310 transitions, 4585 flow [2024-06-20 17:20:23,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 310 transitions, 4486 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:23,608 INFO L231 Difference]: Finished difference. Result has 208 places, 285 transitions, 3808 flow [2024-06-20 17:20:23,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3808, PETRI_PLACES=208, PETRI_TRANSITIONS=285} [2024-06-20 17:20:23,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-20 17:20:23,608 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 285 transitions, 3808 flow [2024-06-20 17:20:23,608 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) [2024-06-20 17:20:23,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:23,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:23,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:20:23,609 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)] === [2024-06-20 17:20:23,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash 266182636, now seen corresponding path program 3 times [2024-06-20 17:20:23,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:23,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001648284] [2024-06-20 17:20:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:23,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:27,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:27,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001648284] [2024-06-20 17:20:27,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001648284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:27,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:27,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:27,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970514114] [2024-06-20 17:20:27,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:27,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:27,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:27,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:27,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:27,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:27,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 285 transitions, 3808 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) [2024-06-20 17:20:27,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:27,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:27,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:28,082 INFO L124 PetriNetUnfolderBase]: 2530/4115 cut-off events. [2024-06-20 17:20:28,082 INFO L125 PetriNetUnfolderBase]: For 258537/258539 co-relation queries the response was YES. [2024-06-20 17:20:28,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34222 conditions, 4115 events. 2530/4115 cut-off events. For 258537/258539 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24308 event pairs, 509 based on Foata normal form. 2/4115 useless extension candidates. Maximal degree in co-relation 34124. Up to 3909 conditions per place. [2024-06-20 17:20:28,125 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 284 selfloop transitions, 15 changer transitions 0/304 dead transitions. [2024-06-20 17:20:28,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 304 transitions, 4516 flow [2024-06-20 17:20:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 17:20:28,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:20:28,127 INFO L175 Difference]: Start difference. First operand has 208 places, 285 transitions, 3808 flow. Second operand 7 states and 112 transitions. [2024-06-20 17:20:28,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 304 transitions, 4516 flow [2024-06-20 17:20:28,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 304 transitions, 4313 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:28,478 INFO L231 Difference]: Finished difference. Result has 210 places, 287 transitions, 3708 flow [2024-06-20 17:20:28,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3605, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3708, PETRI_PLACES=210, PETRI_TRANSITIONS=287} [2024-06-20 17:20:28,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-20 17:20:28,479 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 287 transitions, 3708 flow [2024-06-20 17:20:28,479 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) [2024-06-20 17:20:28,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:28,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:28,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:20:28,479 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)] === [2024-06-20 17:20:28,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1218802322, now seen corresponding path program 3 times [2024-06-20 17:20:28,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:28,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081003784] [2024-06-20 17:20:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:28,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081003784] [2024-06-20 17:20:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081003784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:31,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:31,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:31,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866012453] [2024-06-20 17:20:31,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:31,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:31,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:31,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:31,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:31,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:31,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 287 transitions, 3708 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) [2024-06-20 17:20:31,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:31,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:31,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:33,112 INFO L124 PetriNetUnfolderBase]: 2813/4533 cut-off events. [2024-06-20 17:20:33,112 INFO L125 PetriNetUnfolderBase]: For 322401/322401 co-relation queries the response was YES. [2024-06-20 17:20:33,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39313 conditions, 4533 events. 2813/4533 cut-off events. For 322401/322401 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26826 event pairs, 519 based on Foata normal form. 6/4528 useless extension candidates. Maximal degree in co-relation 39213. Up to 3586 conditions per place. [2024-06-20 17:20:33,162 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 212 selfloop transitions, 155 changer transitions 0/372 dead transitions. [2024-06-20 17:20:33,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 372 transitions, 5974 flow [2024-06-20 17:20:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:20:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:20:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-20 17:20:33,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-20 17:20:33,163 INFO L175 Difference]: Start difference. First operand has 210 places, 287 transitions, 3708 flow. Second operand 10 states and 177 transitions. [2024-06-20 17:20:33,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 372 transitions, 5974 flow [2024-06-20 17:20:33,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 372 transitions, 5887 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:33,577 INFO L231 Difference]: Finished difference. Result has 218 places, 338 transitions, 5125 flow [2024-06-20 17:20:33,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5125, PETRI_PLACES=218, PETRI_TRANSITIONS=338} [2024-06-20 17:20:33,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-20 17:20:33,578 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 338 transitions, 5125 flow [2024-06-20 17:20:33,578 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) [2024-06-20 17:20:33,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:33,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:33,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:20:33,579 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)] === [2024-06-20 17:20:33,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:33,579 INFO L85 PathProgramCache]: Analyzing trace with hash 646889678, now seen corresponding path program 4 times [2024-06-20 17:20:33,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:33,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227153608] [2024-06-20 17:20:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:33,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:35,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:35,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227153608] [2024-06-20 17:20:35,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227153608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:35,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:35,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:35,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18713569] [2024-06-20 17:20:35,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:35,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:35,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:35,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:35,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:36,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:36,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 338 transitions, 5125 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) [2024-06-20 17:20:36,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:36,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:36,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:37,494 INFO L124 PetriNetUnfolderBase]: 2808/4533 cut-off events. [2024-06-20 17:20:37,495 INFO L125 PetriNetUnfolderBase]: For 332296/332298 co-relation queries the response was YES. [2024-06-20 17:20:37,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41297 conditions, 4533 events. 2808/4533 cut-off events. For 332296/332298 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26831 event pairs, 562 based on Foata normal form. 2/4533 useless extension candidates. Maximal degree in co-relation 41193. Up to 4319 conditions per place. [2024-06-20 17:20:37,547 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 331 selfloop transitions, 16 changer transitions 0/352 dead transitions. [2024-06-20 17:20:37,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 352 transitions, 5855 flow [2024-06-20 17:20:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-20 17:20:37,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-20 17:20:37,549 INFO L175 Difference]: Start difference. First operand has 218 places, 338 transitions, 5125 flow. Second operand 8 states and 119 transitions. [2024-06-20 17:20:37,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 352 transitions, 5855 flow [2024-06-20 17:20:37,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 352 transitions, 5463 flow, removed 159 selfloop flow, removed 4 redundant places. [2024-06-20 17:20:37,952 INFO L231 Difference]: Finished difference. Result has 222 places, 338 transitions, 4770 flow [2024-06-20 17:20:37,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4733, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4770, PETRI_PLACES=222, PETRI_TRANSITIONS=338} [2024-06-20 17:20:37,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-20 17:20:37,953 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 338 transitions, 4770 flow [2024-06-20 17:20:37,953 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) [2024-06-20 17:20:37,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:37,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:37,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:20:37,953 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)] === [2024-06-20 17:20:37,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:37,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1212131246, now seen corresponding path program 1 times [2024-06-20 17:20:37,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:37,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313590745] [2024-06-20 17:20:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:37,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:40,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:40,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313590745] [2024-06-20 17:20:40,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313590745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:40,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:40,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:40,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931188056] [2024-06-20 17:20:40,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:40,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:40,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:40,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:40,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:40,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 338 transitions, 4770 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) [2024-06-20 17:20:40,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:40,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:40,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:42,032 INFO L124 PetriNetUnfolderBase]: 2816/4534 cut-off events. [2024-06-20 17:20:42,032 INFO L125 PetriNetUnfolderBase]: For 335637/335637 co-relation queries the response was YES. [2024-06-20 17:20:42,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40419 conditions, 4534 events. 2816/4534 cut-off events. For 335637/335637 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26787 event pairs, 570 based on Foata normal form. 4/4527 useless extension candidates. Maximal degree in co-relation 40314. Up to 4174 conditions per place. [2024-06-20 17:20:42,078 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 292 selfloop transitions, 66 changer transitions 0/363 dead transitions. [2024-06-20 17:20:42,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 363 transitions, 5827 flow [2024-06-20 17:20:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:42,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:20:42,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:20:42,079 INFO L175 Difference]: Start difference. First operand has 222 places, 338 transitions, 4770 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:20:42,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 363 transitions, 5827 flow [2024-06-20 17:20:42,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 363 transitions, 5705 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-20 17:20:42,437 INFO L231 Difference]: Finished difference. Result has 222 places, 346 transitions, 5061 flow [2024-06-20 17:20:42,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4654, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5061, PETRI_PLACES=222, PETRI_TRANSITIONS=346} [2024-06-20 17:20:42,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-20 17:20:42,439 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 346 transitions, 5061 flow [2024-06-20 17:20:42,439 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) [2024-06-20 17:20:42,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:42,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:42,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:20:42,440 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)] === [2024-06-20 17:20:42,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:42,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1212368582, now seen corresponding path program 4 times [2024-06-20 17:20:42,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:42,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220174138] [2024-06-20 17:20:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:42,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:44,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:44,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220174138] [2024-06-20 17:20:44,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220174138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:44,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:44,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:44,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880189256] [2024-06-20 17:20:44,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:44,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:44,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:44,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:44,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:44,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:44,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 346 transitions, 5061 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) [2024-06-20 17:20:44,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:44,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:44,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:46,137 INFO L124 PetriNetUnfolderBase]: 2830/4556 cut-off events. [2024-06-20 17:20:46,138 INFO L125 PetriNetUnfolderBase]: For 343383/343383 co-relation queries the response was YES. [2024-06-20 17:20:46,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40789 conditions, 4556 events. 2830/4556 cut-off events. For 343383/343383 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26910 event pairs, 572 based on Foata normal form. 6/4551 useless extension candidates. Maximal degree in co-relation 40683. Up to 4176 conditions per place. [2024-06-20 17:20:46,190 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 300 selfloop transitions, 66 changer transitions 0/371 dead transitions. [2024-06-20 17:20:46,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 371 transitions, 6074 flow [2024-06-20 17:20:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:20:46,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:20:46,192 INFO L175 Difference]: Start difference. First operand has 222 places, 346 transitions, 5061 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:20:46,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 371 transitions, 6074 flow [2024-06-20 17:20:46,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 371 transitions, 5854 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:46,733 INFO L231 Difference]: Finished difference. Result has 226 places, 355 transitions, 5246 flow [2024-06-20 17:20:46,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4841, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5246, PETRI_PLACES=226, PETRI_TRANSITIONS=355} [2024-06-20 17:20:46,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-20 17:20:46,734 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 355 transitions, 5246 flow [2024-06-20 17:20:46,734 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) [2024-06-20 17:20:46,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:46,734 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] [2024-06-20 17:20:46,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:20:46,734 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)] === [2024-06-20 17:20:46,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash 79152056, now seen corresponding path program 1 times [2024-06-20 17:20:46,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:46,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731902362] [2024-06-20 17:20:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:46,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:48,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:48,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731902362] [2024-06-20 17:20:48,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731902362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:48,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:48,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:48,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310267059] [2024-06-20 17:20:48,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:48,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:48,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:48,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:48,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:48,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:48,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 355 transitions, 5246 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) [2024-06-20 17:20:48,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:48,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:48,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:50,443 INFO L124 PetriNetUnfolderBase]: 2859/4615 cut-off events. [2024-06-20 17:20:50,443 INFO L125 PetriNetUnfolderBase]: For 351531/351531 co-relation queries the response was YES. [2024-06-20 17:20:50,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41653 conditions, 4615 events. 2859/4615 cut-off events. For 351531/351531 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27380 event pairs, 553 based on Foata normal form. 1/4614 useless extension candidates. Maximal degree in co-relation 41545. Up to 4279 conditions per place. [2024-06-20 17:20:50,491 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 45 changer transitions 0/405 dead transitions. [2024-06-20 17:20:50,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 405 transitions, 6682 flow [2024-06-20 17:20:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 17:20:50,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 17:20:50,493 INFO L175 Difference]: Start difference. First operand has 226 places, 355 transitions, 5246 flow. Second operand 8 states and 150 transitions. [2024-06-20 17:20:50,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 405 transitions, 6682 flow [2024-06-20 17:20:50,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 405 transitions, 6424 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:50,942 INFO L231 Difference]: Finished difference. Result has 232 places, 369 transitions, 5423 flow [2024-06-20 17:20:50,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5423, PETRI_PLACES=232, PETRI_TRANSITIONS=369} [2024-06-20 17:20:50,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-20 17:20:50,942 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 369 transitions, 5423 flow [2024-06-20 17:20:50,943 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) [2024-06-20 17:20:50,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:50,943 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] [2024-06-20 17:20:50,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:20:50,943 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)] === [2024-06-20 17:20:50,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:50,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1718270556, now seen corresponding path program 2 times [2024-06-20 17:20:50,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:50,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963361139] [2024-06-20 17:20:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:50,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:53,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:53,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963361139] [2024-06-20 17:20:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963361139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:53,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:53,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:53,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844334674] [2024-06-20 17:20:53,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:53,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:53,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:53,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:53,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 369 transitions, 5423 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) [2024-06-20 17:20:53,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:53,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:53,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:55,369 INFO L124 PetriNetUnfolderBase]: 2869/4629 cut-off events. [2024-06-20 17:20:55,370 INFO L125 PetriNetUnfolderBase]: For 360922/360922 co-relation queries the response was YES. [2024-06-20 17:20:55,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41834 conditions, 4629 events. 2869/4629 cut-off events. For 360922/360922 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27406 event pairs, 554 based on Foata normal form. 2/4629 useless extension candidates. Maximal degree in co-relation 41722. Up to 4353 conditions per place. [2024-06-20 17:20:55,417 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 24 changer transitions 0/399 dead transitions. [2024-06-20 17:20:55,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 399 transitions, 6378 flow [2024-06-20 17:20:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:20:55,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:20:55,435 INFO L175 Difference]: Start difference. First operand has 232 places, 369 transitions, 5423 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:20:55,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 399 transitions, 6378 flow [2024-06-20 17:20:55,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 399 transitions, 6260 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-20 17:20:55,894 INFO L231 Difference]: Finished difference. Result has 237 places, 373 transitions, 5457 flow [2024-06-20 17:20:55,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5457, PETRI_PLACES=237, PETRI_TRANSITIONS=373} [2024-06-20 17:20:55,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-20 17:20:55,895 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 373 transitions, 5457 flow [2024-06-20 17:20:55,896 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) [2024-06-20 17:20:55,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:55,896 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] [2024-06-20 17:20:55,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:20:55,904 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)] === [2024-06-20 17:20:55,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:55,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1588145962, now seen corresponding path program 3 times [2024-06-20 17:20:55,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:55,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641488727] [2024-06-20 17:20:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:55,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:58,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:58,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641488727] [2024-06-20 17:20:58,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641488727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:58,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:58,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:58,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480789019] [2024-06-20 17:20:58,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:58,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:58,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:58,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:58,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:58,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:58,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 373 transitions, 5457 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) [2024-06-20 17:20:58,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:58,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:58,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:59,988 INFO L124 PetriNetUnfolderBase]: 2884/4645 cut-off events. [2024-06-20 17:20:59,988 INFO L125 PetriNetUnfolderBase]: For 372781/372783 co-relation queries the response was YES. [2024-06-20 17:21:00,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42193 conditions, 4645 events. 2884/4645 cut-off events. For 372781/372783 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 27445 event pairs, 569 based on Foata normal form. 3/4646 useless extension candidates. Maximal degree in co-relation 42080. Up to 4290 conditions per place. [2024-06-20 17:21:00,043 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 337 selfloop transitions, 61 changer transitions 0/403 dead transitions. [2024-06-20 17:21:00,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 403 transitions, 6569 flow [2024-06-20 17:21:00,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:21:00,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 17:21:00,045 INFO L175 Difference]: Start difference. First operand has 237 places, 373 transitions, 5457 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:21:00,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 403 transitions, 6569 flow [2024-06-20 17:21:00,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 403 transitions, 6458 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:00,618 INFO L231 Difference]: Finished difference. Result has 239 places, 382 transitions, 5752 flow [2024-06-20 17:21:00,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5752, PETRI_PLACES=239, PETRI_TRANSITIONS=382} [2024-06-20 17:21:00,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-20 17:21:00,619 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 382 transitions, 5752 flow [2024-06-20 17:21:00,619 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) [2024-06-20 17:21:00,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:00,619 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] [2024-06-20 17:21:00,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:21:00,620 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)] === [2024-06-20 17:21:00,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1054943102, now seen corresponding path program 4 times [2024-06-20 17:21:00,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:00,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87548275] [2024-06-20 17:21:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:00,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:03,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:03,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87548275] [2024-06-20 17:21:03,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87548275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:03,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:03,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:03,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194177650] [2024-06-20 17:21:03,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:03,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:03,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:03,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:03,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:03,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:03,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 382 transitions, 5752 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) [2024-06-20 17:21:03,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:03,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:03,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:05,060 INFO L124 PetriNetUnfolderBase]: 2892/4654 cut-off events. [2024-06-20 17:21:05,060 INFO L125 PetriNetUnfolderBase]: For 387960/387960 co-relation queries the response was YES. [2024-06-20 17:21:05,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42942 conditions, 4654 events. 2892/4654 cut-off events. For 387960/387960 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27481 event pairs, 561 based on Foata normal form. 4/4652 useless extension candidates. Maximal degree in co-relation 42828. Up to 4324 conditions per place. [2024-06-20 17:21:05,115 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 371 selfloop transitions, 42 changer transitions 0/418 dead transitions. [2024-06-20 17:21:05,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 418 transitions, 6896 flow [2024-06-20 17:21:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:21:05,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:21:05,116 INFO L175 Difference]: Start difference. First operand has 239 places, 382 transitions, 5752 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:21:05,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 418 transitions, 6896 flow [2024-06-20 17:21:05,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 418 transitions, 6594 flow, removed 96 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:05,620 INFO L231 Difference]: Finished difference. Result has 241 places, 391 transitions, 5807 flow [2024-06-20 17:21:05,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5450, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5807, PETRI_PLACES=241, PETRI_TRANSITIONS=391} [2024-06-20 17:21:05,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-20 17:21:05,621 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 391 transitions, 5807 flow [2024-06-20 17:21:05,621 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) [2024-06-20 17:21:05,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:05,621 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] [2024-06-20 17:21:05,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:21:05,621 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)] === [2024-06-20 17:21:05,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:05,622 INFO L85 PathProgramCache]: Analyzing trace with hash -798442592, now seen corresponding path program 5 times [2024-06-20 17:21:05,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:05,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194798737] [2024-06-20 17:21:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:05,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:07,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:07,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194798737] [2024-06-20 17:21:07,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194798737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:07,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:07,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:07,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425468281] [2024-06-20 17:21:07,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:07,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:07,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:07,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:07,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 391 transitions, 5807 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) [2024-06-20 17:21:07,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:07,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:07,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:09,409 INFO L124 PetriNetUnfolderBase]: 2921/4698 cut-off events. [2024-06-20 17:21:09,410 INFO L125 PetriNetUnfolderBase]: For 402614/402614 co-relation queries the response was YES. [2024-06-20 17:21:09,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44045 conditions, 4698 events. 2921/4698 cut-off events. For 402614/402614 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27781 event pairs, 563 based on Foata normal form. 1/4693 useless extension candidates. Maximal degree in co-relation 43930. Up to 4116 conditions per place. [2024-06-20 17:21:09,462 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 102 changer transitions 0/436 dead transitions. [2024-06-20 17:21:09,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 436 transitions, 7400 flow [2024-06-20 17:21:09,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:21:09,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 17:21:09,464 INFO L175 Difference]: Start difference. First operand has 241 places, 391 transitions, 5807 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:21:09,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 436 transitions, 7400 flow [2024-06-20 17:21:10,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 436 transitions, 7109 flow, removed 109 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:10,039 INFO L231 Difference]: Finished difference. Result has 243 places, 398 transitions, 5928 flow [2024-06-20 17:21:10,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5522, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5928, PETRI_PLACES=243, PETRI_TRANSITIONS=398} [2024-06-20 17:21:10,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-20 17:21:10,040 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 398 transitions, 5928 flow [2024-06-20 17:21:10,040 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) [2024-06-20 17:21:10,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:10,041 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] [2024-06-20 17:21:10,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:21:10,041 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)] === [2024-06-20 17:21:10,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:10,041 INFO L85 PathProgramCache]: Analyzing trace with hash -424972192, now seen corresponding path program 6 times [2024-06-20 17:21:10,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:10,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082044957] [2024-06-20 17:21:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:10,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:12,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:12,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082044957] [2024-06-20 17:21:12,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082044957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:12,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:12,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:12,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850089136] [2024-06-20 17:21:12,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:12,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:12,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:12,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:12,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:12,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 398 transitions, 5928 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) [2024-06-20 17:21:12,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:12,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:12,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:14,076 INFO L124 PetriNetUnfolderBase]: 2908/4680 cut-off events. [2024-06-20 17:21:14,076 INFO L125 PetriNetUnfolderBase]: For 400501/400501 co-relation queries the response was YES. [2024-06-20 17:21:14,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43789 conditions, 4680 events. 2908/4680 cut-off events. For 400501/400501 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27716 event pairs, 564 based on Foata normal form. 3/4677 useless extension candidates. Maximal degree in co-relation 43673. Up to 4104 conditions per place. [2024-06-20 17:21:14,229 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 99 changer transitions 0/432 dead transitions. [2024-06-20 17:21:14,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 432 transitions, 7210 flow [2024-06-20 17:21:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:21:14,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 17:21:14,230 INFO L175 Difference]: Start difference. First operand has 243 places, 398 transitions, 5928 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:21:14,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 432 transitions, 7210 flow [2024-06-20 17:21:14,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 432 transitions, 7004 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:14,786 INFO L231 Difference]: Finished difference. Result has 248 places, 398 transitions, 5928 flow [2024-06-20 17:21:14,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5722, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5928, PETRI_PLACES=248, PETRI_TRANSITIONS=398} [2024-06-20 17:21:14,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-20 17:21:14,786 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 398 transitions, 5928 flow [2024-06-20 17:21:14,787 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) [2024-06-20 17:21:14,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:14,787 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] [2024-06-20 17:21:14,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:21:14,787 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)] === [2024-06-20 17:21:14,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash -700589852, now seen corresponding path program 7 times [2024-06-20 17:21:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:14,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647310623] [2024-06-20 17:21:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:17,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:17,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647310623] [2024-06-20 17:21:17,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647310623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:17,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:17,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:17,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771536112] [2024-06-20 17:21:17,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:17,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:17,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:17,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:17,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:17,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:17,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 398 transitions, 5928 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) [2024-06-20 17:21:17,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:17,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:17,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:19,581 INFO L124 PetriNetUnfolderBase]: 2947/4735 cut-off events. [2024-06-20 17:21:19,582 INFO L125 PetriNetUnfolderBase]: For 418709/418709 co-relation queries the response was YES. [2024-06-20 17:21:19,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44714 conditions, 4735 events. 2947/4735 cut-off events. For 418709/418709 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28041 event pairs, 564 based on Foata normal form. 3/4727 useless extension candidates. Maximal degree in co-relation 44597. Up to 4104 conditions per place. [2024-06-20 17:21:19,631 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 308 selfloop transitions, 124 changer transitions 0/437 dead transitions. [2024-06-20 17:21:19,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 437 transitions, 7345 flow [2024-06-20 17:21:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:21:19,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 17:21:19,633 INFO L175 Difference]: Start difference. First operand has 248 places, 398 transitions, 5928 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:21:19,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 437 transitions, 7345 flow [2024-06-20 17:21:20,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 437 transitions, 7148 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:20,204 INFO L231 Difference]: Finished difference. Result has 252 places, 405 transitions, 6197 flow [2024-06-20 17:21:20,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5741, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6197, PETRI_PLACES=252, PETRI_TRANSITIONS=405} [2024-06-20 17:21:20,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-20 17:21:20,205 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 405 transitions, 6197 flow [2024-06-20 17:21:20,205 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) [2024-06-20 17:21:20,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:20,205 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] [2024-06-20 17:21:20,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:21:20,206 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)] === [2024-06-20 17:21:20,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:20,206 INFO L85 PathProgramCache]: Analyzing trace with hash -700322942, now seen corresponding path program 8 times [2024-06-20 17:21:20,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:20,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727454811] [2024-06-20 17:21:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:20,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:23,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:23,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727454811] [2024-06-20 17:21:23,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727454811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:23,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:23,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:23,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420795961] [2024-06-20 17:21:23,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:23,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:23,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:23,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:23,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:23,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:23,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 405 transitions, 6197 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) [2024-06-20 17:21:23,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:23,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:23,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:25,047 INFO L124 PetriNetUnfolderBase]: 2934/4722 cut-off events. [2024-06-20 17:21:25,047 INFO L125 PetriNetUnfolderBase]: For 426856/426856 co-relation queries the response was YES. [2024-06-20 17:21:25,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44996 conditions, 4722 events. 2934/4722 cut-off events. For 426856/426856 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28070 event pairs, 553 based on Foata normal form. 3/4719 useless extension candidates. Maximal degree in co-relation 44877. Up to 4297 conditions per place. [2024-06-20 17:21:25,100 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 366 selfloop transitions, 56 changer transitions 0/427 dead transitions. [2024-06-20 17:21:25,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 427 transitions, 7135 flow [2024-06-20 17:21:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:25,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:21:25,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:21:25,102 INFO L175 Difference]: Start difference. First operand has 252 places, 405 transitions, 6197 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:21:25,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 427 transitions, 7135 flow [2024-06-20 17:21:25,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 427 transitions, 6814 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:25,873 INFO L231 Difference]: Finished difference. Result has 255 places, 405 transitions, 5996 flow [2024-06-20 17:21:25,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5996, PETRI_PLACES=255, PETRI_TRANSITIONS=405} [2024-06-20 17:21:25,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-20 17:21:25,874 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 405 transitions, 5996 flow [2024-06-20 17:21:25,874 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) [2024-06-20 17:21:25,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:25,874 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] [2024-06-20 17:21:25,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:21:25,875 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)] === [2024-06-20 17:21:25,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash 349214122, now seen corresponding path program 9 times [2024-06-20 17:21:25,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:25,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332612929] [2024-06-20 17:21:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:25,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:28,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:28,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332612929] [2024-06-20 17:21:28,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332612929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:28,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:28,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:28,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642317683] [2024-06-20 17:21:28,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:28,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:28,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:28,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:28,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:28,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 405 transitions, 5996 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) [2024-06-20 17:21:28,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:28,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:28,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:29,751 INFO L124 PetriNetUnfolderBase]: 2916/4690 cut-off events. [2024-06-20 17:21:29,752 INFO L125 PetriNetUnfolderBase]: For 427844/427844 co-relation queries the response was YES. [2024-06-20 17:21:29,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44081 conditions, 4690 events. 2916/4690 cut-off events. For 427844/427844 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27839 event pairs, 573 based on Foata normal form. 6/4685 useless extension candidates. Maximal degree in co-relation 43961. Up to 4299 conditions per place. [2024-06-20 17:21:29,815 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 355 selfloop transitions, 63 changer transitions 0/423 dead transitions. [2024-06-20 17:21:29,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 423 transitions, 7062 flow [2024-06-20 17:21:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:21:29,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 17:21:29,817 INFO L175 Difference]: Start difference. First operand has 255 places, 405 transitions, 5996 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:21:29,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 423 transitions, 7062 flow [2024-06-20 17:21:30,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 423 transitions, 6910 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:30,495 INFO L231 Difference]: Finished difference. Result has 258 places, 406 transitions, 6014 flow [2024-06-20 17:21:30,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6014, PETRI_PLACES=258, PETRI_TRANSITIONS=406} [2024-06-20 17:21:30,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-20 17:21:30,496 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 406 transitions, 6014 flow [2024-06-20 17:21:30,496 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) [2024-06-20 17:21:30,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:30,497 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] [2024-06-20 17:21:30,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:21:30,497 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)] === [2024-06-20 17:21:30,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1107521032, now seen corresponding path program 10 times [2024-06-20 17:21:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:30,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874576643] [2024-06-20 17:21:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:30,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:32,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:32,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874576643] [2024-06-20 17:21:32,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874576643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:32,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:32,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:32,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135582343] [2024-06-20 17:21:32,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:32,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:32,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:32,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:32,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:32,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:32,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 406 transitions, 6014 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) [2024-06-20 17:21:32,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:32,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:32,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:34,481 INFO L124 PetriNetUnfolderBase]: 2922/4699 cut-off events. [2024-06-20 17:21:34,481 INFO L125 PetriNetUnfolderBase]: For 433388/433388 co-relation queries the response was YES. [2024-06-20 17:21:34,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44097 conditions, 4699 events. 2922/4699 cut-off events. For 433388/433388 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27895 event pairs, 571 based on Foata normal form. 6/4694 useless extension candidates. Maximal degree in co-relation 43976. Up to 4157 conditions per place. [2024-06-20 17:21:34,535 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 295 selfloop transitions, 132 changer transitions 0/432 dead transitions. [2024-06-20 17:21:34,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 432 transitions, 7233 flow [2024-06-20 17:21:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:21:34,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:21:34,537 INFO L175 Difference]: Start difference. First operand has 258 places, 406 transitions, 6014 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:21:34,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 432 transitions, 7233 flow [2024-06-20 17:21:35,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 432 transitions, 7038 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:35,270 INFO L231 Difference]: Finished difference. Result has 261 places, 410 transitions, 6231 flow [2024-06-20 17:21:35,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6231, PETRI_PLACES=261, PETRI_TRANSITIONS=410} [2024-06-20 17:21:35,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-20 17:21:35,272 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 410 transitions, 6231 flow [2024-06-20 17:21:35,272 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) [2024-06-20 17:21:35,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:35,272 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] [2024-06-20 17:21:35,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:21:35,275 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)] === [2024-06-20 17:21:35,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1107787942, now seen corresponding path program 11 times [2024-06-20 17:21:35,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:35,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65877525] [2024-06-20 17:21:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:37,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:37,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65877525] [2024-06-20 17:21:37,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65877525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:37,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:37,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:37,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980919385] [2024-06-20 17:21:37,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:37,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:37,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:37,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:37,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:37,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:37,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 410 transitions, 6231 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) [2024-06-20 17:21:37,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:37,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:37,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:39,615 INFO L124 PetriNetUnfolderBase]: 2933/4716 cut-off events. [2024-06-20 17:21:39,615 INFO L125 PetriNetUnfolderBase]: For 441066/441066 co-relation queries the response was YES. [2024-06-20 17:21:39,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44996 conditions, 4716 events. 2933/4716 cut-off events. For 441066/441066 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27989 event pairs, 568 based on Foata normal form. 3/4708 useless extension candidates. Maximal degree in co-relation 44874. Up to 4002 conditions per place. [2024-06-20 17:21:39,671 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 267 selfloop transitions, 167 changer transitions 0/439 dead transitions. [2024-06-20 17:21:39,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 439 transitions, 7626 flow [2024-06-20 17:21:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:39,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:39,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:21:39,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:21:39,673 INFO L175 Difference]: Start difference. First operand has 261 places, 410 transitions, 6231 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:21:39,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 439 transitions, 7626 flow [2024-06-20 17:21:40,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 439 transitions, 7243 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:40,450 INFO L231 Difference]: Finished difference. Result has 265 places, 413 transitions, 6370 flow [2024-06-20 17:21:40,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5848, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6370, PETRI_PLACES=265, PETRI_TRANSITIONS=413} [2024-06-20 17:21:40,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-20 17:21:40,451 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 413 transitions, 6370 flow [2024-06-20 17:21:40,451 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) [2024-06-20 17:21:40,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:40,452 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] [2024-06-20 17:21:40,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:21:40,452 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)] === [2024-06-20 17:21:40,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:40,452 INFO L85 PathProgramCache]: Analyzing trace with hash -26583109, now seen corresponding path program 1 times [2024-06-20 17:21:40,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:40,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458984642] [2024-06-20 17:21:40,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:40,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:43,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:43,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458984642] [2024-06-20 17:21:43,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458984642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:43,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:43,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:43,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964189340] [2024-06-20 17:21:43,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:43,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:43,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:43,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:43,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:43,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:43,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 413 transitions, 6370 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) [2024-06-20 17:21:43,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:43,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:43,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:45,556 INFO L124 PetriNetUnfolderBase]: 2985/4804 cut-off events. [2024-06-20 17:21:45,557 INFO L125 PetriNetUnfolderBase]: For 484772/484772 co-relation queries the response was YES. [2024-06-20 17:21:45,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46049 conditions, 4804 events. 2985/4804 cut-off events. For 484772/484772 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28605 event pairs, 583 based on Foata normal form. 14/4807 useless extension candidates. Maximal degree in co-relation 45926. Up to 4399 conditions per place. [2024-06-20 17:21:45,610 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 385 selfloop transitions, 44 changer transitions 0/434 dead transitions. [2024-06-20 17:21:45,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 434 transitions, 7431 flow [2024-06-20 17:21:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:21:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:21:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:21:45,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:21:45,612 INFO L175 Difference]: Start difference. First operand has 265 places, 413 transitions, 6370 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:21:45,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 434 transitions, 7431 flow [2024-06-20 17:21:46,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 434 transitions, 7163 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:46,302 INFO L231 Difference]: Finished difference. Result has 266 places, 415 transitions, 6253 flow [2024-06-20 17:21:46,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6102, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6253, PETRI_PLACES=266, PETRI_TRANSITIONS=415} [2024-06-20 17:21:46,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-20 17:21:46,310 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 415 transitions, 6253 flow [2024-06-20 17:21:46,310 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) [2024-06-20 17:21:46,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:46,310 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] [2024-06-20 17:21:46,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:21:46,310 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)] === [2024-06-20 17:21:46,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1078899573, now seen corresponding path program 2 times [2024-06-20 17:21:46,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:46,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933417196] [2024-06-20 17:21:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:46,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:48,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:48,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933417196] [2024-06-20 17:21:48,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933417196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:48,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:48,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:21:48,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779976197] [2024-06-20 17:21:48,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:48,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:21:48,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:48,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:21:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:21:48,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:48,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 415 transitions, 6253 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) [2024-06-20 17:21:48,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:48,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:48,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:50,631 INFO L124 PetriNetUnfolderBase]: 3046/4901 cut-off events. [2024-06-20 17:21:50,631 INFO L125 PetriNetUnfolderBase]: For 492340/492340 co-relation queries the response was YES. [2024-06-20 17:21:50,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47000 conditions, 4901 events. 3046/4901 cut-off events. For 492340/492340 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 29273 event pairs, 588 based on Foata normal form. 8/4898 useless extension candidates. Maximal degree in co-relation 46876. Up to 4339 conditions per place. [2024-06-20 17:21:50,709 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 394 selfloop transitions, 42 changer transitions 0/441 dead transitions. [2024-06-20 17:21:50,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 441 transitions, 7557 flow [2024-06-20 17:21:50,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:21:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:21:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:21:50,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 17:21:50,710 INFO L175 Difference]: Start difference. First operand has 266 places, 415 transitions, 6253 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:21:50,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 441 transitions, 7557 flow [2024-06-20 17:21:51,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 441 transitions, 7441 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:51,718 INFO L231 Difference]: Finished difference. Result has 268 places, 417 transitions, 6261 flow [2024-06-20 17:21:51,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6137, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6261, PETRI_PLACES=268, PETRI_TRANSITIONS=417} [2024-06-20 17:21:51,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-20 17:21:51,718 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 417 transitions, 6261 flow [2024-06-20 17:21:51,718 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) [2024-06-20 17:21:51,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:51,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:51,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:21:51,719 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)] === [2024-06-20 17:21:51,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:51,719 INFO L85 PathProgramCache]: Analyzing trace with hash -788878689, now seen corresponding path program 1 times [2024-06-20 17:21:51,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:51,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906152523] [2024-06-20 17:21:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:51,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:54,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:54,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906152523] [2024-06-20 17:21:54,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906152523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:54,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:54,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:54,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478648446] [2024-06-20 17:21:54,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:54,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:54,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:54,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:54,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:54,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:54,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 417 transitions, 6261 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) [2024-06-20 17:21:54,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:54,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:54,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:56,416 INFO L124 PetriNetUnfolderBase]: 3302/5313 cut-off events. [2024-06-20 17:21:56,417 INFO L125 PetriNetUnfolderBase]: For 614743/614743 co-relation queries the response was YES. [2024-06-20 17:21:56,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53162 conditions, 5313 events. 3302/5313 cut-off events. For 614743/614743 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32296 event pairs, 562 based on Foata normal form. 16/5323 useless extension candidates. Maximal degree in co-relation 53037. Up to 4167 conditions per place. [2024-06-20 17:21:56,480 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 362 selfloop transitions, 107 changer transitions 0/474 dead transitions. [2024-06-20 17:21:56,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 474 transitions, 8163 flow [2024-06-20 17:21:56,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:21:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:21:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:21:56,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:21:56,482 INFO L175 Difference]: Start difference. First operand has 268 places, 417 transitions, 6261 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:21:56,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 474 transitions, 8163 flow [2024-06-20 17:21:57,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 474 transitions, 8109 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:21:57,323 INFO L231 Difference]: Finished difference. Result has 275 places, 422 transitions, 6608 flow [2024-06-20 17:21:57,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6207, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6608, PETRI_PLACES=275, PETRI_TRANSITIONS=422} [2024-06-20 17:21:57,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-20 17:21:57,324 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 422 transitions, 6608 flow [2024-06-20 17:21:57,324 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) [2024-06-20 17:21:57,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:57,324 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] [2024-06-20 17:21:57,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:21:57,324 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)] === [2024-06-20 17:21:57,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash -424962179, now seen corresponding path program 2 times [2024-06-20 17:21:57,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:57,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806542314] [2024-06-20 17:21:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:57,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:01,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:01,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806542314] [2024-06-20 17:22:01,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806542314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:01,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:01,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871163916] [2024-06-20 17:22:01,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:01,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:01,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:01,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:01,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:01,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 422 transitions, 6608 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) [2024-06-20 17:22:01,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:01,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:01,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:03,675 INFO L124 PetriNetUnfolderBase]: 3980/6374 cut-off events. [2024-06-20 17:22:03,675 INFO L125 PetriNetUnfolderBase]: For 971799/971799 co-relation queries the response was YES. [2024-06-20 17:22:03,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69576 conditions, 6374 events. 3980/6374 cut-off events. For 971799/971799 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39336 event pairs, 801 based on Foata normal form. 56/6424 useless extension candidates. Maximal degree in co-relation 69448. Up to 4790 conditions per place. [2024-06-20 17:22:03,768 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 375 selfloop transitions, 96 changer transitions 0/476 dead transitions. [2024-06-20 17:22:03,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 476 transitions, 8602 flow [2024-06-20 17:22:03,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:22:03,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 17:22:03,769 INFO L175 Difference]: Start difference. First operand has 275 places, 422 transitions, 6608 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:22:03,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 476 transitions, 8602 flow [2024-06-20 17:22:04,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 476 transitions, 8414 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:05,004 INFO L231 Difference]: Finished difference. Result has 282 places, 432 transitions, 7040 flow [2024-06-20 17:22:05,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6420, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7040, PETRI_PLACES=282, PETRI_TRANSITIONS=432} [2024-06-20 17:22:05,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-20 17:22:05,005 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 432 transitions, 7040 flow [2024-06-20 17:22:05,005 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) [2024-06-20 17:22:05,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:05,005 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] [2024-06-20 17:22:05,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:22:05,005 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)] === [2024-06-20 17:22:05,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash -424958459, now seen corresponding path program 3 times [2024-06-20 17:22:05,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:05,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983978235] [2024-06-20 17:22:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:05,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:08,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:08,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983978235] [2024-06-20 17:22:08,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983978235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:08,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:08,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:08,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718365502] [2024-06-20 17:22:08,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:08,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:08,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:08,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:08,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:08,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 432 transitions, 7040 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) [2024-06-20 17:22:08,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:08,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:08,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:10,882 INFO L124 PetriNetUnfolderBase]: 4113/6631 cut-off events. [2024-06-20 17:22:10,882 INFO L125 PetriNetUnfolderBase]: For 1042138/1042138 co-relation queries the response was YES. [2024-06-20 17:22:10,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69414 conditions, 6631 events. 4113/6631 cut-off events. For 1042138/1042138 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 41397 event pairs, 954 based on Foata normal form. 124/6749 useless extension candidates. Maximal degree in co-relation 69282. Up to 5370 conditions per place. [2024-06-20 17:22:10,977 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 361 selfloop transitions, 105 changer transitions 3/474 dead transitions. [2024-06-20 17:22:10,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 474 transitions, 8657 flow [2024-06-20 17:22:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:22:10,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:22:10,979 INFO L175 Difference]: Start difference. First operand has 282 places, 432 transitions, 7040 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:22:10,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 474 transitions, 8657 flow [2024-06-20 17:22:12,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 474 transitions, 8479 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:12,302 INFO L231 Difference]: Finished difference. Result has 289 places, 436 transitions, 7436 flow [2024-06-20 17:22:12,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6878, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7436, PETRI_PLACES=289, PETRI_TRANSITIONS=436} [2024-06-20 17:22:12,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-20 17:22:12,302 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 436 transitions, 7436 flow [2024-06-20 17:22:12,302 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) [2024-06-20 17:22:12,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:12,303 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] [2024-06-20 17:22:12,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:22:12,303 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)] === [2024-06-20 17:22:12,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash -700312929, now seen corresponding path program 4 times [2024-06-20 17:22:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:12,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132852023] [2024-06-20 17:22:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:15,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:15,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132852023] [2024-06-20 17:22:15,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132852023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:15,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:15,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:15,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128071855] [2024-06-20 17:22:15,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:15,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:15,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:15,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:15,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:15,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:15,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 436 transitions, 7436 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) [2024-06-20 17:22:15,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:15,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:15,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:17,612 INFO L124 PetriNetUnfolderBase]: 4318/6994 cut-off events. [2024-06-20 17:22:17,613 INFO L125 PetriNetUnfolderBase]: For 922944/922944 co-relation queries the response was YES. [2024-06-20 17:22:17,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73874 conditions, 6994 events. 4318/6994 cut-off events. For 922944/922944 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 44465 event pairs, 983 based on Foata normal form. 48/7036 useless extension candidates. Maximal degree in co-relation 73738. Up to 5631 conditions per place. [2024-06-20 17:22:17,714 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 414 selfloop transitions, 60 changer transitions 0/479 dead transitions. [2024-06-20 17:22:17,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 479 transitions, 9115 flow [2024-06-20 17:22:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:22:17,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:22:17,716 INFO L175 Difference]: Start difference. First operand has 289 places, 436 transitions, 7436 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:22:17,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 479 transitions, 9115 flow [2024-06-20 17:22:19,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 479 transitions, 8843 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:19,243 INFO L231 Difference]: Finished difference. Result has 294 places, 441 transitions, 7547 flow [2024-06-20 17:22:19,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7203, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7547, PETRI_PLACES=294, PETRI_TRANSITIONS=441} [2024-06-20 17:22:19,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-20 17:22:19,244 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 441 transitions, 7547 flow [2024-06-20 17:22:19,244 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) [2024-06-20 17:22:19,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:19,244 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] [2024-06-20 17:22:19,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:22:19,244 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)] === [2024-06-20 17:22:19,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -219211715, now seen corresponding path program 1 times [2024-06-20 17:22:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841707774] [2024-06-20 17:22:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:22,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:22,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841707774] [2024-06-20 17:22:22,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841707774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:22,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:22,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:22,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376116017] [2024-06-20 17:22:22,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:22,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:22,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:22,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:22,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:22,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:22,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 441 transitions, 7547 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) [2024-06-20 17:22:22,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:22,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:22,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:24,570 INFO L124 PetriNetUnfolderBase]: 4394/7104 cut-off events. [2024-06-20 17:22:24,570 INFO L125 PetriNetUnfolderBase]: For 863836/863836 co-relation queries the response was YES. [2024-06-20 17:22:24,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74333 conditions, 7104 events. 4394/7104 cut-off events. For 863836/863836 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 45304 event pairs, 1169 based on Foata normal form. 20/7113 useless extension candidates. Maximal degree in co-relation 74195. Up to 6512 conditions per place. [2024-06-20 17:22:24,666 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 371 selfloop transitions, 102 changer transitions 0/478 dead transitions. [2024-06-20 17:22:24,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 478 transitions, 8972 flow [2024-06-20 17:22:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:22:24,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:22:24,667 INFO L175 Difference]: Start difference. First operand has 294 places, 441 transitions, 7547 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:22:24,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 478 transitions, 8972 flow [2024-06-20 17:22:26,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 478 transitions, 8831 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:26,010 INFO L231 Difference]: Finished difference. Result has 297 places, 444 transitions, 7744 flow [2024-06-20 17:22:26,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7406, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7744, PETRI_PLACES=297, PETRI_TRANSITIONS=444} [2024-06-20 17:22:26,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-20 17:22:26,010 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 444 transitions, 7744 flow [2024-06-20 17:22:26,011 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) [2024-06-20 17:22:26,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:26,011 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] [2024-06-20 17:22:26,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:22:26,011 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)] === [2024-06-20 17:22:26,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash -219217667, now seen corresponding path program 5 times [2024-06-20 17:22:26,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:26,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020433543] [2024-06-20 17:22:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:26,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:28,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:28,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020433543] [2024-06-20 17:22:28,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020433543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:28,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:28,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:28,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352368234] [2024-06-20 17:22:28,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:28,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:28,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:28,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:28,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:28,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:28,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 444 transitions, 7744 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) [2024-06-20 17:22:28,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:28,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:28,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:31,343 INFO L124 PetriNetUnfolderBase]: 4670/7542 cut-off events. [2024-06-20 17:22:31,343 INFO L125 PetriNetUnfolderBase]: For 1034856/1034856 co-relation queries the response was YES. [2024-06-20 17:22:31,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78608 conditions, 7542 events. 4670/7542 cut-off events. For 1034856/1034856 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 48529 event pairs, 1241 based on Foata normal form. 68/7599 useless extension candidates. Maximal degree in co-relation 78468. Up to 6556 conditions per place. [2024-06-20 17:22:31,438 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 366 selfloop transitions, 88 changer transitions 37/496 dead transitions. [2024-06-20 17:22:31,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 496 transitions, 9467 flow [2024-06-20 17:22:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:22:31,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:22:31,440 INFO L175 Difference]: Start difference. First operand has 297 places, 444 transitions, 7744 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:22:31,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 496 transitions, 9467 flow [2024-06-20 17:22:33,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 496 transitions, 9245 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:33,242 INFO L231 Difference]: Finished difference. Result has 302 places, 429 transitions, 7593 flow [2024-06-20 17:22:33,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7537, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7593, PETRI_PLACES=302, PETRI_TRANSITIONS=429} [2024-06-20 17:22:33,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-20 17:22:33,243 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 429 transitions, 7593 flow [2024-06-20 17:22:33,243 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) [2024-06-20 17:22:33,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:33,243 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] [2024-06-20 17:22:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:22:33,243 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)] === [2024-06-20 17:22:33,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash 871836065, now seen corresponding path program 6 times [2024-06-20 17:22:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:33,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991459563] [2024-06-20 17:22:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:33,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:35,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:35,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991459563] [2024-06-20 17:22:35,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991459563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:35,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:35,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:35,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159329619] [2024-06-20 17:22:35,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:35,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:35,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:35,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:35,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:35,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:35,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 429 transitions, 7593 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) [2024-06-20 17:22:35,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:35,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:35,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:38,424 INFO L124 PetriNetUnfolderBase]: 4646/7524 cut-off events. [2024-06-20 17:22:38,424 INFO L125 PetriNetUnfolderBase]: For 1054603/1054603 co-relation queries the response was YES. [2024-06-20 17:22:38,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79294 conditions, 7524 events. 4646/7524 cut-off events. For 1054603/1054603 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 48565 event pairs, 1242 based on Foata normal form. 54/7567 useless extension candidates. Maximal degree in co-relation 79152. Up to 6641 conditions per place. [2024-06-20 17:22:38,529 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 347 selfloop transitions, 120 changer transitions 7/479 dead transitions. [2024-06-20 17:22:38,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 479 transitions, 9353 flow [2024-06-20 17:22:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 17:22:38,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:22:38,531 INFO L175 Difference]: Start difference. First operand has 302 places, 429 transitions, 7593 flow. Second operand 10 states and 168 transitions. [2024-06-20 17:22:38,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 479 transitions, 9353 flow [2024-06-20 17:22:40,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 479 transitions, 9045 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-20 17:22:40,249 INFO L231 Difference]: Finished difference. Result has 307 places, 446 transitions, 8074 flow [2024-06-20 17:22:40,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7293, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8074, PETRI_PLACES=307, PETRI_TRANSITIONS=446} [2024-06-20 17:22:40,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-20 17:22:40,250 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 446 transitions, 8074 flow [2024-06-20 17:22:40,250 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) [2024-06-20 17:22:40,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:40,250 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] [2024-06-20 17:22:40,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:22:40,250 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)] === [2024-06-20 17:22:40,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1107797955, now seen corresponding path program 7 times [2024-06-20 17:22:40,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:40,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346015031] [2024-06-20 17:22:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:40,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:42,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:42,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346015031] [2024-06-20 17:22:42,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346015031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:42,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:42,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:42,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448987532] [2024-06-20 17:22:42,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:42,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:42,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:42,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:42,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:42,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:42,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 446 transitions, 8074 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) [2024-06-20 17:22:42,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:42,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:42,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:45,315 INFO L124 PetriNetUnfolderBase]: 4941/7999 cut-off events. [2024-06-20 17:22:45,315 INFO L125 PetriNetUnfolderBase]: For 1204662/1204662 co-relation queries the response was YES. [2024-06-20 17:22:45,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86913 conditions, 7999 events. 4941/7999 cut-off events. For 1204662/1204662 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 52141 event pairs, 1292 based on Foata normal form. 48/8036 useless extension candidates. Maximal degree in co-relation 86768. Up to 6260 conditions per place. [2024-06-20 17:22:45,447 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 347 selfloop transitions, 133 changer transitions 0/485 dead transitions. [2024-06-20 17:22:45,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 485 transitions, 9890 flow [2024-06-20 17:22:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:22:45,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 17:22:45,449 INFO L175 Difference]: Start difference. First operand has 307 places, 446 transitions, 8074 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:22:45,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 485 transitions, 9890 flow [2024-06-20 17:22:47,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 485 transitions, 9671 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:47,655 INFO L231 Difference]: Finished difference. Result has 311 places, 449 transitions, 8299 flow [2024-06-20 17:22:47,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7855, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8299, PETRI_PLACES=311, PETRI_TRANSITIONS=449} [2024-06-20 17:22:47,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-20 17:22:47,656 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 449 transitions, 8299 flow [2024-06-20 17:22:47,656 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) [2024-06-20 17:22:47,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:47,657 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] [2024-06-20 17:22:47,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:22:47,657 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)] === [2024-06-20 17:22:47,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:47,657 INFO L85 PathProgramCache]: Analyzing trace with hash -19915877, now seen corresponding path program 8 times [2024-06-20 17:22:47,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:47,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498005837] [2024-06-20 17:22:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:47,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:50,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:50,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498005837] [2024-06-20 17:22:50,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498005837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:50,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:50,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:50,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227191355] [2024-06-20 17:22:50,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:50,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:50,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:50,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:50,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 449 transitions, 8299 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) [2024-06-20 17:22:50,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:50,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:50,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:53,323 INFO L124 PetriNetUnfolderBase]: 5058/8202 cut-off events. [2024-06-20 17:22:53,323 INFO L125 PetriNetUnfolderBase]: For 1218045/1218045 co-relation queries the response was YES. [2024-06-20 17:22:53,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87816 conditions, 8202 events. 5058/8202 cut-off events. For 1218045/1218045 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 53703 event pairs, 1472 based on Foata normal form. 54/8245 useless extension candidates. Maximal degree in co-relation 87670. Up to 7488 conditions per place. [2024-06-20 17:22:53,449 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 385 selfloop transitions, 72 changer transitions 12/474 dead transitions. [2024-06-20 17:22:53,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 474 transitions, 9517 flow [2024-06-20 17:22:53,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:22:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:22:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:22:53,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 17:22:53,450 INFO L175 Difference]: Start difference. First operand has 311 places, 449 transitions, 8299 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:22:53,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 474 transitions, 9517 flow [2024-06-20 17:22:56,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 474 transitions, 9204 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:56,012 INFO L231 Difference]: Finished difference. Result has 314 places, 441 transitions, 8026 flow [2024-06-20 17:22:56,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7991, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8026, PETRI_PLACES=314, PETRI_TRANSITIONS=441} [2024-06-20 17:22:56,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-20 17:22:56,012 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 441 transitions, 8026 flow [2024-06-20 17:22:56,012 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) [2024-06-20 17:22:56,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:56,013 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] [2024-06-20 17:22:56,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:22:56,013 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)] === [2024-06-20 17:22:56,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:56,013 INFO L85 PathProgramCache]: Analyzing trace with hash -12291365, now seen corresponding path program 2 times [2024-06-20 17:22:56,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:56,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475837335] [2024-06-20 17:22:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:56,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:58,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:58,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475837335] [2024-06-20 17:22:58,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475837335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:58,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:58,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:58,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570024839] [2024-06-20 17:22:58,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:58,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:58,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:58,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:58,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:58,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 441 transitions, 8026 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) [2024-06-20 17:22:58,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:58,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:58,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:01,219 INFO L124 PetriNetUnfolderBase]: 5039/8177 cut-off events. [2024-06-20 17:23:01,219 INFO L125 PetriNetUnfolderBase]: For 1122117/1122117 co-relation queries the response was YES. [2024-06-20 17:23:01,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87064 conditions, 8177 events. 5039/8177 cut-off events. For 1122117/1122117 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 53656 event pairs, 1400 based on Foata normal form. 22/8188 useless extension candidates. Maximal degree in co-relation 86917. Up to 7632 conditions per place. [2024-06-20 17:23:01,340 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 410 selfloop transitions, 57 changer transitions 0/472 dead transitions. [2024-06-20 17:23:01,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 472 transitions, 9422 flow [2024-06-20 17:23:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:23:01,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:23:01,342 INFO L175 Difference]: Start difference. First operand has 314 places, 441 transitions, 8026 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:23:01,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 472 transitions, 9422 flow [2024-06-20 17:23:03,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 472 transitions, 9222 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:03,939 INFO L231 Difference]: Finished difference. Result has 316 places, 447 transitions, 8156 flow [2024-06-20 17:23:03,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7826, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8156, PETRI_PLACES=316, PETRI_TRANSITIONS=447} [2024-06-20 17:23:03,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-20 17:23:03,940 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 447 transitions, 8156 flow [2024-06-20 17:23:03,940 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) [2024-06-20 17:23:03,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:03,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:03,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:23:03,941 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)] === [2024-06-20 17:23:03,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:03,941 INFO L85 PathProgramCache]: Analyzing trace with hash -12558275, now seen corresponding path program 3 times [2024-06-20 17:23:03,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:03,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134088092] [2024-06-20 17:23:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:03,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:07,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:07,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134088092] [2024-06-20 17:23:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134088092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:07,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:07,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939919087] [2024-06-20 17:23:07,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:07,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:07,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:07,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:07,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 447 transitions, 8156 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) [2024-06-20 17:23:07,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:07,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:09,946 INFO L124 PetriNetUnfolderBase]: 5102/8278 cut-off events. [2024-06-20 17:23:09,947 INFO L125 PetriNetUnfolderBase]: For 1135934/1135934 co-relation queries the response was YES. [2024-06-20 17:23:10,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88199 conditions, 8278 events. 5102/8278 cut-off events. For 1135934/1135934 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 54418 event pairs, 1461 based on Foata normal form. 20/8287 useless extension candidates. Maximal degree in co-relation 88050. Up to 7737 conditions per place. [2024-06-20 17:23:10,089 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 393 selfloop transitions, 76 changer transitions 0/474 dead transitions. [2024-06-20 17:23:10,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 474 transitions, 9457 flow [2024-06-20 17:23:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:23:10,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:23:10,091 INFO L175 Difference]: Start difference. First operand has 316 places, 447 transitions, 8156 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:23:10,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 474 transitions, 9457 flow [2024-06-20 17:23:12,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 474 transitions, 9239 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:12,651 INFO L231 Difference]: Finished difference. Result has 319 places, 450 transitions, 8249 flow [2024-06-20 17:23:12,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7938, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8249, PETRI_PLACES=319, PETRI_TRANSITIONS=450} [2024-06-20 17:23:12,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-20 17:23:12,652 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 450 transitions, 8249 flow [2024-06-20 17:23:12,652 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) [2024-06-20 17:23:12,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:12,652 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] [2024-06-20 17:23:12,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:23:12,652 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)] === [2024-06-20 17:23:12,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:12,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1535775823, now seen corresponding path program 1 times [2024-06-20 17:23:12,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:12,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510170827] [2024-06-20 17:23:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:12,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:15,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:15,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510170827] [2024-06-20 17:23:15,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510170827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:15,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:15,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:15,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699820771] [2024-06-20 17:23:15,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:15,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:15,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:15,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:15,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 450 transitions, 8249 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) [2024-06-20 17:23:15,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:15,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:15,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:18,469 INFO L124 PetriNetUnfolderBase]: 5099/8287 cut-off events. [2024-06-20 17:23:18,470 INFO L125 PetriNetUnfolderBase]: For 1081510/1081510 co-relation queries the response was YES. [2024-06-20 17:23:18,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88052 conditions, 8287 events. 5099/8287 cut-off events. For 1081510/1081510 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 54630 event pairs, 1444 based on Foata normal form. 1/8286 useless extension candidates. Maximal degree in co-relation 87902. Up to 7917 conditions per place. [2024-06-20 17:23:18,606 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 452 selfloop transitions, 29 changer transitions 0/486 dead transitions. [2024-06-20 17:23:18,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 486 transitions, 9413 flow [2024-06-20 17:23:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:23:18,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 17:23:18,608 INFO L175 Difference]: Start difference. First operand has 319 places, 450 transitions, 8249 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:23:18,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 486 transitions, 9413 flow [2024-06-20 17:23:21,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 486 transitions, 9187 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:21,152 INFO L231 Difference]: Finished difference. Result has 321 places, 453 transitions, 8198 flow [2024-06-20 17:23:21,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8023, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8198, PETRI_PLACES=321, PETRI_TRANSITIONS=453} [2024-06-20 17:23:21,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-20 17:23:21,153 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 453 transitions, 8198 flow [2024-06-20 17:23:21,154 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) [2024-06-20 17:23:21,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:21,154 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] [2024-06-20 17:23:21,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:23:21,154 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)] === [2024-06-20 17:23:21,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:21,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2020097685, now seen corresponding path program 1 times [2024-06-20 17:23:21,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:21,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166215490] [2024-06-20 17:23:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:21,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:23,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:23,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166215490] [2024-06-20 17:23:23,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166215490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:23,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:23,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:23,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613972951] [2024-06-20 17:23:23,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:23,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:23,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:23,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:23,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:23,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:23,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 453 transitions, 8198 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) [2024-06-20 17:23:23,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:23,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:23,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:27,028 INFO L124 PetriNetUnfolderBase]: 5114/8312 cut-off events. [2024-06-20 17:23:27,029 INFO L125 PetriNetUnfolderBase]: For 1094177/1094177 co-relation queries the response was YES. [2024-06-20 17:23:27,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87790 conditions, 8312 events. 5114/8312 cut-off events. For 1094177/1094177 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 54484 event pairs, 1314 based on Foata normal form. 2/8312 useless extension candidates. Maximal degree in co-relation 87639. Up to 7785 conditions per place. [2024-06-20 17:23:27,159 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 437 selfloop transitions, 57 changer transitions 0/499 dead transitions. [2024-06-20 17:23:27,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 499 transitions, 9691 flow [2024-06-20 17:23:27,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 17:23:27,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 17:23:27,161 INFO L175 Difference]: Start difference. First operand has 321 places, 453 transitions, 8198 flow. Second operand 8 states and 156 transitions. [2024-06-20 17:23:27,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 499 transitions, 9691 flow [2024-06-20 17:23:29,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 499 transitions, 9544 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:29,779 INFO L231 Difference]: Finished difference. Result has 324 places, 458 transitions, 8330 flow [2024-06-20 17:23:29,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8051, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8330, PETRI_PLACES=324, PETRI_TRANSITIONS=458} [2024-06-20 17:23:29,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-20 17:23:29,780 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 458 transitions, 8330 flow [2024-06-20 17:23:29,780 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) [2024-06-20 17:23:29,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:29,780 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, 1] [2024-06-20 17:23:29,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:23:29,781 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)] === [2024-06-20 17:23:29,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:29,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1310024035, now seen corresponding path program 2 times [2024-06-20 17:23:29,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:29,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002208188] [2024-06-20 17:23:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:29,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:32,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:32,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002208188] [2024-06-20 17:23:32,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002208188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:32,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:32,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:32,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478834904] [2024-06-20 17:23:32,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:32,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:32,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:32,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:32,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:32,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:32,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 458 transitions, 8330 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) [2024-06-20 17:23:32,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:32,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:32,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:35,923 INFO L124 PetriNetUnfolderBase]: 5127/8333 cut-off events. [2024-06-20 17:23:35,924 INFO L125 PetriNetUnfolderBase]: For 1118110/1118110 co-relation queries the response was YES. [2024-06-20 17:23:36,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88455 conditions, 8333 events. 5127/8333 cut-off events. For 1118110/1118110 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 54894 event pairs, 1443 based on Foata normal form. 2/8333 useless extension candidates. Maximal degree in co-relation 88302. Up to 7918 conditions per place. [2024-06-20 17:23:36,063 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 57 changer transitions 0/494 dead transitions. [2024-06-20 17:23:36,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 494 transitions, 9525 flow [2024-06-20 17:23:36,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:23:36,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 17:23:36,065 INFO L175 Difference]: Start difference. First operand has 324 places, 458 transitions, 8330 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:23:36,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 494 transitions, 9525 flow [2024-06-20 17:23:38,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 494 transitions, 9319 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:38,801 INFO L231 Difference]: Finished difference. Result has 327 places, 463 transitions, 8368 flow [2024-06-20 17:23:38,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8152, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8368, PETRI_PLACES=327, PETRI_TRANSITIONS=463} [2024-06-20 17:23:38,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-20 17:23:38,802 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 463 transitions, 8368 flow [2024-06-20 17:23:38,802 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) [2024-06-20 17:23:38,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:38,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:38,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:23:38,802 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)] === [2024-06-20 17:23:38,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1726784245, now seen corresponding path program 2 times [2024-06-20 17:23:38,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:38,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749749611] [2024-06-20 17:23:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:38,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:42,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:42,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749749611] [2024-06-20 17:23:42,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749749611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:42,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:42,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:42,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155596475] [2024-06-20 17:23:42,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:42,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:42,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:42,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:42,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:42,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:42,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 463 transitions, 8368 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) [2024-06-20 17:23:42,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:42,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:42,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:45,361 INFO L124 PetriNetUnfolderBase]: 5132/8337 cut-off events. [2024-06-20 17:23:45,361 INFO L125 PetriNetUnfolderBase]: For 1135170/1135172 co-relation queries the response was YES. [2024-06-20 17:23:45,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88639 conditions, 8337 events. 5132/8337 cut-off events. For 1135170/1135172 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 54957 event pairs, 1444 based on Foata normal form. 1/8336 useless extension candidates. Maximal degree in co-relation 88486. Up to 7843 conditions per place. [2024-06-20 17:23:45,487 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 416 selfloop transitions, 72 changer transitions 0/493 dead transitions. [2024-06-20 17:23:45,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 493 transitions, 9592 flow [2024-06-20 17:23:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 17:23:45,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 17:23:45,488 INFO L175 Difference]: Start difference. First operand has 327 places, 463 transitions, 8368 flow. Second operand 8 states and 143 transitions. [2024-06-20 17:23:45,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 493 transitions, 9592 flow [2024-06-20 17:23:48,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 493 transitions, 9453 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:48,381 INFO L231 Difference]: Finished difference. Result has 330 places, 466 transitions, 8513 flow [2024-06-20 17:23:48,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8229, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8513, PETRI_PLACES=330, PETRI_TRANSITIONS=466} [2024-06-20 17:23:48,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-20 17:23:48,382 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 466 transitions, 8513 flow [2024-06-20 17:23:48,382 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) [2024-06-20 17:23:48,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:48,382 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] [2024-06-20 17:23:48,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:23:48,382 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)] === [2024-06-20 17:23:48,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:48,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1450618517, now seen corresponding path program 3 times [2024-06-20 17:23:48,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:48,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739346692] [2024-06-20 17:23:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:48,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:51,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:51,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739346692] [2024-06-20 17:23:51,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739346692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:51,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:51,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:51,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518711367] [2024-06-20 17:23:51,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:51,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:51,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:51,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:51,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 466 transitions, 8513 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) [2024-06-20 17:23:51,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:51,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:51,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:54,148 INFO L124 PetriNetUnfolderBase]: 5127/8336 cut-off events. [2024-06-20 17:23:54,148 INFO L125 PetriNetUnfolderBase]: For 1161417/1161419 co-relation queries the response was YES. [2024-06-20 17:23:54,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89158 conditions, 8336 events. 5127/8336 cut-off events. For 1161417/1161419 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 54993 event pairs, 1449 based on Foata normal form. 2/8336 useless extension candidates. Maximal degree in co-relation 89004. Up to 7918 conditions per place. [2024-06-20 17:23:54,266 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 427 selfloop transitions, 56 changer transitions 0/488 dead transitions. [2024-06-20 17:23:54,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 488 transitions, 9548 flow [2024-06-20 17:23:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:23:54,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 17:23:54,268 INFO L175 Difference]: Start difference. First operand has 330 places, 466 transitions, 8513 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:23:54,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 488 transitions, 9548 flow [2024-06-20 17:23:56,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 488 transitions, 9268 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:56,840 INFO L231 Difference]: Finished difference. Result has 333 places, 467 transitions, 8376 flow [2024-06-20 17:23:56,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8233, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8376, PETRI_PLACES=333, PETRI_TRANSITIONS=467} [2024-06-20 17:23:56,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-20 17:23:56,841 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 467 transitions, 8376 flow [2024-06-20 17:23:56,841 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) [2024-06-20 17:23:56,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:56,841 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] [2024-06-20 17:23:56,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:23:56,841 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)] === [2024-06-20 17:23:56,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:56,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1729634261, now seen corresponding path program 1 times [2024-06-20 17:23:56,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:56,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342668876] [2024-06-20 17:23:56,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:56,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:59,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:59,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342668876] [2024-06-20 17:23:59,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342668876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:59,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:59,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:59,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132101347] [2024-06-20 17:23:59,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:59,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:59,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:59,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:59,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:59,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:59,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 467 transitions, 8376 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) [2024-06-20 17:23:59,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:59,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:59,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:02,397 INFO L124 PetriNetUnfolderBase]: 5220/8476 cut-off events. [2024-06-20 17:24:02,398 INFO L125 PetriNetUnfolderBase]: For 1242537/1242537 co-relation queries the response was YES. [2024-06-20 17:24:02,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91913 conditions, 8476 events. 5220/8476 cut-off events. For 1242537/1242537 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 55973 event pairs, 1438 based on Foata normal form. 2/8476 useless extension candidates. Maximal degree in co-relation 91757. Up to 7960 conditions per place. [2024-06-20 17:24:02,524 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 457 selfloop transitions, 58 changer transitions 0/520 dead transitions. [2024-06-20 17:24:02,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 520 transitions, 10184 flow [2024-06-20 17:24:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:24:02,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:24:02,525 INFO L175 Difference]: Start difference. First operand has 333 places, 467 transitions, 8376 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:24:02,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 520 transitions, 10184 flow [2024-06-20 17:24:05,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 520 transitions, 10051 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:05,324 INFO L231 Difference]: Finished difference. Result has 338 places, 473 transitions, 8575 flow [2024-06-20 17:24:05,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8243, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8575, PETRI_PLACES=338, PETRI_TRANSITIONS=473} [2024-06-20 17:24:05,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-20 17:24:05,325 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 473 transitions, 8575 flow [2024-06-20 17:24:05,325 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) [2024-06-20 17:24:05,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:05,325 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] [2024-06-20 17:24:05,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:24:05,325 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)] === [2024-06-20 17:24:05,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1729573811, now seen corresponding path program 2 times [2024-06-20 17:24:05,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:05,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95937702] [2024-06-20 17:24:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:05,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:09,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:09,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95937702] [2024-06-20 17:24:09,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95937702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:09,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:09,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:09,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375322931] [2024-06-20 17:24:09,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:09,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:09,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:09,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:09,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:09,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:09,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 473 transitions, 8575 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) [2024-06-20 17:24:09,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:09,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:09,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:12,185 INFO L124 PetriNetUnfolderBase]: 5209/8444 cut-off events. [2024-06-20 17:24:12,185 INFO L125 PetriNetUnfolderBase]: For 1296910/1296910 co-relation queries the response was YES. [2024-06-20 17:24:12,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91950 conditions, 8444 events. 5209/8444 cut-off events. For 1296910/1296910 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 55571 event pairs, 1409 based on Foata normal form. 13/8455 useless extension candidates. Maximal degree in co-relation 91792. Up to 8038 conditions per place. [2024-06-20 17:24:12,312 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 464 selfloop transitions, 31 changer transitions 11/511 dead transitions. [2024-06-20 17:24:12,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 511 transitions, 9866 flow [2024-06-20 17:24:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:24:12,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 17:24:12,313 INFO L175 Difference]: Start difference. First operand has 338 places, 473 transitions, 8575 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:24:12,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 511 transitions, 9866 flow [2024-06-20 17:24:15,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 511 transitions, 9668 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:15,251 INFO L231 Difference]: Finished difference. Result has 343 places, 467 transitions, 8373 flow [2024-06-20 17:24:15,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8377, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8373, PETRI_PLACES=343, PETRI_TRANSITIONS=467} [2024-06-20 17:24:15,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-20 17:24:15,251 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 467 transitions, 8373 flow [2024-06-20 17:24:15,251 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) [2024-06-20 17:24:15,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:15,251 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] [2024-06-20 17:24:15,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:24:15,251 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)] === [2024-06-20 17:24:15,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash 696994453, now seen corresponding path program 3 times [2024-06-20 17:24:15,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:15,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975845291] [2024-06-20 17:24:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:15,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:18,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:18,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975845291] [2024-06-20 17:24:18,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975845291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:18,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:18,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:18,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741644741] [2024-06-20 17:24:18,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:18,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:18,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:18,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:18,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 467 transitions, 8373 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) [2024-06-20 17:24:18,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:18,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:18,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:21,162 INFO L124 PetriNetUnfolderBase]: 5092/8261 cut-off events. [2024-06-20 17:24:21,163 INFO L125 PetriNetUnfolderBase]: For 1322543/1322543 co-relation queries the response was YES. [2024-06-20 17:24:21,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90715 conditions, 8261 events. 5092/8261 cut-off events. For 1322543/1322543 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 54118 event pairs, 1359 based on Foata normal form. 10/8269 useless extension candidates. Maximal degree in co-relation 90554. Up to 7879 conditions per place. [2024-06-20 17:24:21,289 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 466 selfloop transitions, 25 changer transitions 4/500 dead transitions. [2024-06-20 17:24:21,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 500 transitions, 9596 flow [2024-06-20 17:24:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 17:24:21,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 17:24:21,291 INFO L175 Difference]: Start difference. First operand has 343 places, 467 transitions, 8373 flow. Second operand 9 states and 149 transitions. [2024-06-20 17:24:21,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 500 transitions, 9596 flow [2024-06-20 17:24:24,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 500 transitions, 9305 flow, removed 39 selfloop flow, removed 14 redundant places. [2024-06-20 17:24:24,146 INFO L231 Difference]: Finished difference. Result has 338 places, 468 transitions, 8193 flow [2024-06-20 17:24:24,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8082, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8193, PETRI_PLACES=338, PETRI_TRANSITIONS=468} [2024-06-20 17:24:24,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-20 17:24:24,147 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 468 transitions, 8193 flow [2024-06-20 17:24:24,147 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) [2024-06-20 17:24:24,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:24,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:24,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:24:24,148 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)] === [2024-06-20 17:24:24,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 977924757, now seen corresponding path program 4 times [2024-06-20 17:24:24,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:24,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072371389] [2024-06-20 17:24:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:24,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:27,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:27,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072371389] [2024-06-20 17:24:27,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072371389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:27,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:27,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:27,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378023502] [2024-06-20 17:24:27,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:27,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:27,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:27,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:27,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:27,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:27,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 468 transitions, 8193 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) [2024-06-20 17:24:27,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:27,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:27,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:30,149 INFO L124 PetriNetUnfolderBase]: 5162/8368 cut-off events. [2024-06-20 17:24:30,150 INFO L125 PetriNetUnfolderBase]: For 1356326/1356328 co-relation queries the response was YES. [2024-06-20 17:24:30,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91605 conditions, 8368 events. 5162/8368 cut-off events. For 1356326/1356328 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 54927 event pairs, 1383 based on Foata normal form. 22/8388 useless extension candidates. Maximal degree in co-relation 91448. Up to 7846 conditions per place. [2024-06-20 17:24:30,272 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 423 selfloop transitions, 67 changer transitions 4/499 dead transitions. [2024-06-20 17:24:30,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 499 transitions, 9548 flow [2024-06-20 17:24:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:24:30,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 17:24:30,273 INFO L175 Difference]: Start difference. First operand has 338 places, 468 transitions, 8193 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:24:30,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 499 transitions, 9548 flow [2024-06-20 17:24:33,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 499 transitions, 9467 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:33,122 INFO L231 Difference]: Finished difference. Result has 340 places, 468 transitions, 8322 flow [2024-06-20 17:24:33,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8112, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8322, PETRI_PLACES=340, PETRI_TRANSITIONS=468} [2024-06-20 17:24:33,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-20 17:24:33,123 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 468 transitions, 8322 flow [2024-06-20 17:24:33,123 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) [2024-06-20 17:24:33,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:33,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:33,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:24:33,123 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)] === [2024-06-20 17:24:33,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash 41233813, now seen corresponding path program 3 times [2024-06-20 17:24:33,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:33,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053379958] [2024-06-20 17:24:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:33,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:36,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:36,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053379958] [2024-06-20 17:24:36,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053379958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:36,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:36,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:24:36,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753661120] [2024-06-20 17:24:36,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:36,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:24:36,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:36,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:24:36,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:24:36,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:36,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 468 transitions, 8322 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) [2024-06-20 17:24:36,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:36,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:36,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:39,117 INFO L124 PetriNetUnfolderBase]: 5134/8332 cut-off events. [2024-06-20 17:24:39,117 INFO L125 PetriNetUnfolderBase]: For 1294721/1294721 co-relation queries the response was YES. [2024-06-20 17:24:39,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91546 conditions, 8332 events. 5134/8332 cut-off events. For 1294721/1294721 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54712 event pairs, 1384 based on Foata normal form. 1/8327 useless extension candidates. Maximal degree in co-relation 91388. Up to 7953 conditions per place. [2024-06-20 17:24:39,240 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 30 changer transitions 0/494 dead transitions. [2024-06-20 17:24:39,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 494 transitions, 9506 flow [2024-06-20 17:24:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:24:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:24:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:24:39,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:24:39,242 INFO L175 Difference]: Start difference. First operand has 340 places, 468 transitions, 8322 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:24:39,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 494 transitions, 9506 flow [2024-06-20 17:24:42,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 494 transitions, 9336 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:42,178 INFO L231 Difference]: Finished difference. Result has 341 places, 471 transitions, 8360 flow [2024-06-20 17:24:42,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8152, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8360, PETRI_PLACES=341, PETRI_TRANSITIONS=471} [2024-06-20 17:24:42,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-20 17:24:42,179 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 471 transitions, 8360 flow [2024-06-20 17:24:42,179 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) [2024-06-20 17:24:42,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:42,179 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] [2024-06-20 17:24:42,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:24:42,179 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)] === [2024-06-20 17:24:42,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:42,180 INFO L85 PathProgramCache]: Analyzing trace with hash -728466055, now seen corresponding path program 4 times [2024-06-20 17:24:42,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:42,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299747475] [2024-06-20 17:24:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:42,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:45,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:45,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299747475] [2024-06-20 17:24:45,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299747475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:45,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:45,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:24:45,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167783500] [2024-06-20 17:24:45,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:45,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:24:45,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:24:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:24:45,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:45,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 471 transitions, 8360 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) [2024-06-20 17:24:45,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:45,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:45,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:48,090 INFO L124 PetriNetUnfolderBase]: 5141/8336 cut-off events. [2024-06-20 17:24:48,090 INFO L125 PetriNetUnfolderBase]: For 1326494/1326494 co-relation queries the response was YES. [2024-06-20 17:24:48,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91931 conditions, 8336 events. 5141/8336 cut-off events. For 1326494/1326494 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54646 event pairs, 1356 based on Foata normal form. 3/8333 useless extension candidates. Maximal degree in co-relation 91772. Up to 7888 conditions per place. [2024-06-20 17:24:48,215 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 450 selfloop transitions, 46 changer transitions 0/501 dead transitions. [2024-06-20 17:24:48,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 501 transitions, 9922 flow [2024-06-20 17:24:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:24:48,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:24:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:24:48,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 17:24:48,216 INFO L175 Difference]: Start difference. First operand has 341 places, 471 transitions, 8360 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:24:48,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 501 transitions, 9922 flow [2024-06-20 17:24:51,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 501 transitions, 9736 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:51,037 INFO L231 Difference]: Finished difference. Result has 343 places, 478 transitions, 8563 flow [2024-06-20 17:24:51,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8174, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8563, PETRI_PLACES=343, PETRI_TRANSITIONS=478} [2024-06-20 17:24:51,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-20 17:24:51,044 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 478 transitions, 8563 flow [2024-06-20 17:24:51,044 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) [2024-06-20 17:24:51,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:51,044 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] [2024-06-20 17:24:51,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:24:51,045 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)] === [2024-06-20 17:24:51,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:51,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1046802761, now seen corresponding path program 5 times [2024-06-20 17:24:51,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:51,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624569561] [2024-06-20 17:24:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:51,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:53,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:53,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624569561] [2024-06-20 17:24:53,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624569561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:53,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:53,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:53,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203317687] [2024-06-20 17:24:53,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:53,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:53,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:53,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:53,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:53,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:53,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 478 transitions, 8563 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) [2024-06-20 17:24:53,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:53,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:53,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:56,829 INFO L124 PetriNetUnfolderBase]: 5234/8483 cut-off events. [2024-06-20 17:24:56,829 INFO L125 PetriNetUnfolderBase]: For 1424252/1424252 co-relation queries the response was YES. [2024-06-20 17:24:56,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95773 conditions, 8483 events. 5234/8483 cut-off events. For 1424252/1424252 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 55814 event pairs, 1409 based on Foata normal form. 2/8479 useless extension candidates. Maximal degree in co-relation 95613. Up to 7886 conditions per place. [2024-06-20 17:24:56,957 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 448 selfloop transitions, 78 changer transitions 0/531 dead transitions. [2024-06-20 17:24:56,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 531 transitions, 10444 flow [2024-06-20 17:24:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:24:56,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:24:56,959 INFO L175 Difference]: Start difference. First operand has 343 places, 478 transitions, 8563 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:24:56,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 531 transitions, 10444 flow [2024-06-20 17:25:00,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 531 transitions, 10244 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-20 17:25:00,377 INFO L231 Difference]: Finished difference. Result has 349 places, 484 transitions, 8750 flow [2024-06-20 17:25:00,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8363, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8750, PETRI_PLACES=349, PETRI_TRANSITIONS=484} [2024-06-20 17:25:00,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-20 17:25:00,378 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 484 transitions, 8750 flow [2024-06-20 17:25:00,378 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) [2024-06-20 17:25:00,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:00,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:00,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:25:00,378 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)] === [2024-06-20 17:25:00,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:00,378 INFO L85 PathProgramCache]: Analyzing trace with hash -5077939, now seen corresponding path program 6 times [2024-06-20 17:25:00,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:00,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486542708] [2024-06-20 17:25:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:00,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:02,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486542708] [2024-06-20 17:25:02,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486542708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:02,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:02,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703664907] [2024-06-20 17:25:02,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:02,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:02,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:02,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:02,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 484 transitions, 8750 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) [2024-06-20 17:25:02,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:02,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:02,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:05,886 INFO L124 PetriNetUnfolderBase]: 5229/8482 cut-off events. [2024-06-20 17:25:05,886 INFO L125 PetriNetUnfolderBase]: For 1437791/1437791 co-relation queries the response was YES. [2024-06-20 17:25:05,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95959 conditions, 8482 events. 5229/8482 cut-off events. For 1437791/1437791 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 55829 event pairs, 1422 based on Foata normal form. 2/8478 useless extension candidates. Maximal degree in co-relation 95796. Up to 7986 conditions per place. [2024-06-20 17:25:06,014 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 443 selfloop transitions, 73 changer transitions 0/521 dead transitions. [2024-06-20 17:25:06,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 521 transitions, 10125 flow [2024-06-20 17:25:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:06,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 17:25:06,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 17:25:06,016 INFO L175 Difference]: Start difference. First operand has 349 places, 484 transitions, 8750 flow. Second operand 9 states and 158 transitions. [2024-06-20 17:25:06,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 521 transitions, 10125 flow [2024-06-20 17:25:09,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 521 transitions, 9773 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-20 17:25:10,005 INFO L231 Difference]: Finished difference. Result has 350 places, 484 transitions, 8549 flow [2024-06-20 17:25:10,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8549, PETRI_PLACES=350, PETRI_TRANSITIONS=484} [2024-06-20 17:25:10,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-20 17:25:10,006 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 484 transitions, 8549 flow [2024-06-20 17:25:10,006 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) [2024-06-20 17:25:10,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:10,006 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] [2024-06-20 17:25:10,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:25:10,007 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:10,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:10,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1659301099, now seen corresponding path program 7 times [2024-06-20 17:25:10,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:10,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650343033] [2024-06-20 17:25:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:10,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:13,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:13,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650343033] [2024-06-20 17:25:13,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650343033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:13,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:13,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703994849] [2024-06-20 17:25:13,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:13,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:13,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:13,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:13,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:13,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:13,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 484 transitions, 8549 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) [2024-06-20 17:25:13,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:13,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:13,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:16,252 INFO L124 PetriNetUnfolderBase]: 5242/8493 cut-off events. [2024-06-20 17:25:16,252 INFO L125 PetriNetUnfolderBase]: For 1485276/1485276 co-relation queries the response was YES. [2024-06-20 17:25:16,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95696 conditions, 8493 events. 5242/8493 cut-off events. For 1485276/1485276 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 55780 event pairs, 1399 based on Foata normal form. 10/8497 useless extension candidates. Maximal degree in co-relation 95534. Up to 8073 conditions per place. [2024-06-20 17:25:16,382 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 473 selfloop transitions, 32 changer transitions 4/514 dead transitions. [2024-06-20 17:25:16,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 514 transitions, 9800 flow [2024-06-20 17:25:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 17:25:16,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-20 17:25:16,383 INFO L175 Difference]: Start difference. First operand has 350 places, 484 transitions, 8549 flow. Second operand 9 states and 148 transitions. [2024-06-20 17:25:16,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 514 transitions, 9800 flow [2024-06-20 17:25:19,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 514 transitions, 9560 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-20 17:25:19,242 INFO L231 Difference]: Finished difference. Result has 351 places, 485 transitions, 8438 flow [2024-06-20 17:25:19,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8309, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8438, PETRI_PLACES=351, PETRI_TRANSITIONS=485} [2024-06-20 17:25:19,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-20 17:25:19,243 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 485 transitions, 8438 flow [2024-06-20 17:25:19,243 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) [2024-06-20 17:25:19,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:19,244 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] [2024-06-20 17:25:19,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:25:19,244 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:19,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash -825157721, now seen corresponding path program 8 times [2024-06-20 17:25:19,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:19,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636290093] [2024-06-20 17:25:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:21,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:21,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636290093] [2024-06-20 17:25:21,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636290093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:21,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:21,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:21,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835560870] [2024-06-20 17:25:21,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:21,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:21,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:21,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:21,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:21,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 485 transitions, 8438 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) [2024-06-20 17:25:21,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:21,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:21,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:24,949 INFO L124 PetriNetUnfolderBase]: 5384/8737 cut-off events. [2024-06-20 17:25:24,950 INFO L125 PetriNetUnfolderBase]: For 1593788/1593788 co-relation queries the response was YES. [2024-06-20 17:25:25,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100524 conditions, 8737 events. 5384/8737 cut-off events. For 1593788/1593788 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 57740 event pairs, 1448 based on Foata normal form. 2/8733 useless extension candidates. Maximal degree in co-relation 100361. Up to 7879 conditions per place. [2024-06-20 17:25:25,080 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 113 changer transitions 0/538 dead transitions. [2024-06-20 17:25:25,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 538 transitions, 10364 flow [2024-06-20 17:25:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:25:25,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 17:25:25,082 INFO L175 Difference]: Start difference. First operand has 351 places, 485 transitions, 8438 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:25:25,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 538 transitions, 10364 flow [2024-06-20 17:25:28,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 538 transitions, 10229 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 17:25:28,226 INFO L231 Difference]: Finished difference. Result has 353 places, 491 transitions, 8774 flow [2024-06-20 17:25:28,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8303, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8774, PETRI_PLACES=353, PETRI_TRANSITIONS=491} [2024-06-20 17:25:28,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-20 17:25:28,227 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 491 transitions, 8774 flow [2024-06-20 17:25:28,227 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) [2024-06-20 17:25:28,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:28,227 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] [2024-06-20 17:25:28,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:25:28,227 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:28,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash -643496721, now seen corresponding path program 9 times [2024-06-20 17:25:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:28,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388440342] [2024-06-20 17:25:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:31,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:31,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388440342] [2024-06-20 17:25:31,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388440342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:31,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:31,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:31,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160788369] [2024-06-20 17:25:31,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:31,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:31,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:31,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:31,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:31,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 491 transitions, 8774 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) [2024-06-20 17:25:31,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:31,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:31,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:34,032 INFO L124 PetriNetUnfolderBase]: 5392/8751 cut-off events. [2024-06-20 17:25:34,033 INFO L125 PetriNetUnfolderBase]: For 1624615/1624615 co-relation queries the response was YES. [2024-06-20 17:25:34,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101428 conditions, 8751 events. 5392/8751 cut-off events. For 1624615/1624615 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 57897 event pairs, 1463 based on Foata normal form. 2/8747 useless extension candidates. Maximal degree in co-relation 101263. Up to 8065 conditions per place. [2024-06-20 17:25:34,196 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 417 selfloop transitions, 108 changer transitions 0/530 dead transitions. [2024-06-20 17:25:34,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 530 transitions, 10261 flow [2024-06-20 17:25:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:25:34,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:25:34,200 INFO L175 Difference]: Start difference. First operand has 353 places, 491 transitions, 8774 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:25:34,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 530 transitions, 10261 flow [2024-06-20 17:25:38,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 530 transitions, 9960 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 17:25:38,067 INFO L231 Difference]: Finished difference. Result has 356 places, 493 transitions, 8779 flow [2024-06-20 17:25:38,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8487, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8779, PETRI_PLACES=356, PETRI_TRANSITIONS=493} [2024-06-20 17:25:38,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-20 17:25:38,068 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 493 transitions, 8779 flow [2024-06-20 17:25:38,068 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) [2024-06-20 17:25:38,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:38,068 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] [2024-06-20 17:25:38,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:25:38,068 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:38,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:38,069 INFO L85 PathProgramCache]: Analyzing trace with hash -292004151, now seen corresponding path program 10 times [2024-06-20 17:25:38,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:38,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437714535] [2024-06-20 17:25:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:40,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:40,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437714535] [2024-06-20 17:25:40,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437714535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:40,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:40,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:40,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628326573] [2024-06-20 17:25:40,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:40,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:40,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:40,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:40,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:40,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:40,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 493 transitions, 8779 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) [2024-06-20 17:25:40,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:40,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:40,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:43,922 INFO L124 PetriNetUnfolderBase]: 5400/8775 cut-off events. [2024-06-20 17:25:43,922 INFO L125 PetriNetUnfolderBase]: For 1652862/1652862 co-relation queries the response was YES. [2024-06-20 17:25:44,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101537 conditions, 8775 events. 5400/8775 cut-off events. For 1652862/1652862 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 58052 event pairs, 1261 based on Foata normal form. 2/8771 useless extension candidates. Maximal degree in co-relation 101371. Up to 6648 conditions per place. [2024-06-20 17:25:44,050 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 137 changer transitions 0/551 dead transitions. [2024-06-20 17:25:44,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 551 transitions, 10970 flow [2024-06-20 17:25:44,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 17:25:44,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-20 17:25:44,051 INFO L175 Difference]: Start difference. First operand has 356 places, 493 transitions, 8779 flow. Second operand 9 states and 173 transitions. [2024-06-20 17:25:44,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 551 transitions, 10970 flow [2024-06-20 17:25:47,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 551 transitions, 10707 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:47,344 INFO L231 Difference]: Finished difference. Result has 360 places, 499 transitions, 9063 flow [2024-06-20 17:25:47,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8516, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9063, PETRI_PLACES=360, PETRI_TRANSITIONS=499} [2024-06-20 17:25:47,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-20 17:25:47,347 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 499 transitions, 9063 flow [2024-06-20 17:25:47,347 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) [2024-06-20 17:25:47,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:47,347 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] [2024-06-20 17:25:47,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:25:47,347 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:47,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:47,347 INFO L85 PathProgramCache]: Analyzing trace with hash -347029461, now seen corresponding path program 11 times [2024-06-20 17:25:47,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:47,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455657928] [2024-06-20 17:25:47,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:47,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:50,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:50,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455657928] [2024-06-20 17:25:50,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455657928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:50,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:50,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:50,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739050883] [2024-06-20 17:25:50,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:50,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:50,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:50,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:50,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:50,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:50,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 499 transitions, 9063 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) [2024-06-20 17:25:50,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:50,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:50,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:53,580 INFO L124 PetriNetUnfolderBase]: 5367/8704 cut-off events. [2024-06-20 17:25:53,580 INFO L125 PetriNetUnfolderBase]: For 1681345/1681345 co-relation queries the response was YES. [2024-06-20 17:25:53,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101582 conditions, 8704 events. 5367/8704 cut-off events. For 1681345/1681345 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 57411 event pairs, 1298 based on Foata normal form. 10/8708 useless extension candidates. Maximal degree in co-relation 101413. Up to 6630 conditions per place. [2024-06-20 17:25:53,711 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 129 changer transitions 0/548 dead transitions. [2024-06-20 17:25:53,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 548 transitions, 10865 flow [2024-06-20 17:25:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:25:53,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 17:25:53,712 INFO L175 Difference]: Start difference. First operand has 360 places, 499 transitions, 9063 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:25:53,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 548 transitions, 10865 flow [2024-06-20 17:25:58,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 548 transitions, 10557 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-20 17:25:58,041 INFO L231 Difference]: Finished difference. Result has 364 places, 499 transitions, 9019 flow [2024-06-20 17:25:58,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8755, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9019, PETRI_PLACES=364, PETRI_TRANSITIONS=499} [2024-06-20 17:25:58,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-20 17:25:58,041 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 499 transitions, 9019 flow [2024-06-20 17:25:58,042 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) [2024-06-20 17:25:58,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:58,042 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] [2024-06-20 17:25:58,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:25:58,042 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:25:58,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:58,042 INFO L85 PathProgramCache]: Analyzing trace with hash -288937011, now seen corresponding path program 12 times [2024-06-20 17:25:58,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:58,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520307335] [2024-06-20 17:25:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:58,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:00,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:00,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520307335] [2024-06-20 17:26:00,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520307335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:00,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:00,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:00,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353374638] [2024-06-20 17:26:00,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:00,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:00,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:00,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:00,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:00,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 499 transitions, 9019 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) [2024-06-20 17:26:00,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:00,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:00,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:03,803 INFO L124 PetriNetUnfolderBase]: 5339/8676 cut-off events. [2024-06-20 17:26:03,804 INFO L125 PetriNetUnfolderBase]: For 1651141/1651141 co-relation queries the response was YES. [2024-06-20 17:26:03,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99903 conditions, 8676 events. 5339/8676 cut-off events. For 1651141/1651141 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 57381 event pairs, 1396 based on Foata normal form. 12/8682 useless extension candidates. Maximal degree in co-relation 99733. Up to 7638 conditions per place. [2024-06-20 17:26:03,935 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 427 selfloop transitions, 110 changer transitions 0/542 dead transitions. [2024-06-20 17:26:03,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 542 transitions, 10809 flow [2024-06-20 17:26:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:26:03,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 17:26:03,937 INFO L175 Difference]: Start difference. First operand has 364 places, 499 transitions, 9019 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:26:03,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 542 transitions, 10809 flow [2024-06-20 17:26:08,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 542 transitions, 10526 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 17:26:08,045 INFO L231 Difference]: Finished difference. Result has 365 places, 499 transitions, 8963 flow [2024-06-20 17:26:08,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8736, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8963, PETRI_PLACES=365, PETRI_TRANSITIONS=499} [2024-06-20 17:26:08,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-20 17:26:08,046 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 499 transitions, 8963 flow [2024-06-20 17:26:08,046 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) [2024-06-20 17:26:08,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:08,046 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] [2024-06-20 17:26:08,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:26:08,047 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:08,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:08,047 INFO L85 PathProgramCache]: Analyzing trace with hash -289233681, now seen corresponding path program 13 times [2024-06-20 17:26:08,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:08,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006225976] [2024-06-20 17:26:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:08,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:11,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006225976] [2024-06-20 17:26:11,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006225976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:11,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:11,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:11,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104866289] [2024-06-20 17:26:11,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:11,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:11,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:11,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:11,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:11,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 499 transitions, 8963 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) [2024-06-20 17:26:11,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:11,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:11,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:14,591 INFO L124 PetriNetUnfolderBase]: 5368/8705 cut-off events. [2024-06-20 17:26:14,592 INFO L125 PetriNetUnfolderBase]: For 1640808/1640808 co-relation queries the response was YES. [2024-06-20 17:26:14,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99564 conditions, 8705 events. 5368/8705 cut-off events. For 1640808/1640808 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 57499 event pairs, 1443 based on Foata normal form. 12/8706 useless extension candidates. Maximal degree in co-relation 99393. Up to 7727 conditions per place. [2024-06-20 17:26:14,721 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 402 selfloop transitions, 158 changer transitions 0/565 dead transitions. [2024-06-20 17:26:14,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 565 transitions, 11443 flow [2024-06-20 17:26:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:26:14,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 17:26:14,723 INFO L175 Difference]: Start difference. First operand has 365 places, 499 transitions, 8963 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:26:14,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 565 transitions, 11443 flow [2024-06-20 17:26:18,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 565 transitions, 11188 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 17:26:18,150 INFO L231 Difference]: Finished difference. Result has 370 places, 523 transitions, 9736 flow [2024-06-20 17:26:18,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8738, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9736, PETRI_PLACES=370, PETRI_TRANSITIONS=523} [2024-06-20 17:26:18,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 17:26:18,151 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 523 transitions, 9736 flow [2024-06-20 17:26:18,151 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) [2024-06-20 17:26:18,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:18,151 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] [2024-06-20 17:26:18,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:26:18,151 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:18,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1896458197, now seen corresponding path program 14 times [2024-06-20 17:26:18,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:18,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665303970] [2024-06-20 17:26:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:21,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:21,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665303970] [2024-06-20 17:26:21,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665303970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:21,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:21,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:21,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656091812] [2024-06-20 17:26:21,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:21,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:21,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:21,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:21,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:21,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:21,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 523 transitions, 9736 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) [2024-06-20 17:26:21,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:21,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:21,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:24,592 INFO L124 PetriNetUnfolderBase]: 5573/9072 cut-off events. [2024-06-20 17:26:24,592 INFO L125 PetriNetUnfolderBase]: For 1720583/1720583 co-relation queries the response was YES. [2024-06-20 17:26:24,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104709 conditions, 9072 events. 5573/9072 cut-off events. For 1720583/1720583 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 60411 event pairs, 1506 based on Foata normal form. 12/9078 useless extension candidates. Maximal degree in co-relation 104535. Up to 7829 conditions per place. [2024-06-20 17:26:24,740 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 498 selfloop transitions, 59 changer transitions 2/564 dead transitions. [2024-06-20 17:26:24,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 564 transitions, 11567 flow [2024-06-20 17:26:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:26:24,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-20 17:26:24,742 INFO L175 Difference]: Start difference. First operand has 370 places, 523 transitions, 9736 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:26:24,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 564 transitions, 11567 flow [2024-06-20 17:26:29,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 564 transitions, 11297 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 17:26:29,498 INFO L231 Difference]: Finished difference. Result has 375 places, 528 transitions, 9772 flow [2024-06-20 17:26:29,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9466, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9772, PETRI_PLACES=375, PETRI_TRANSITIONS=528} [2024-06-20 17:26:29,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-20 17:26:29,498 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 528 transitions, 9772 flow [2024-06-20 17:26:29,499 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) [2024-06-20 17:26:29,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:29,499 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] [2024-06-20 17:26:29,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:26:29,499 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:29,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1090271031, now seen corresponding path program 15 times [2024-06-20 17:26:29,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:29,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098899638] [2024-06-20 17:26:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:29,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:33,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:33,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098899638] [2024-06-20 17:26:33,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098899638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:33,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:33,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:33,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759738278] [2024-06-20 17:26:33,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:33,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:33,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:33,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:33,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:33,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:33,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 528 transitions, 9772 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) [2024-06-20 17:26:33,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:33,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:33,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:36,335 INFO L124 PetriNetUnfolderBase]: 5617/9140 cut-off events. [2024-06-20 17:26:36,335 INFO L125 PetriNetUnfolderBase]: For 1758648/1758648 co-relation queries the response was YES. [2024-06-20 17:26:36,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105682 conditions, 9140 events. 5617/9140 cut-off events. For 1758648/1758648 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 61087 event pairs, 1520 based on Foata normal form. 12/9146 useless extension candidates. Maximal degree in co-relation 105506. Up to 8539 conditions per place. [2024-06-20 17:26:36,484 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 499 selfloop transitions, 54 changer transitions 0/558 dead transitions. [2024-06-20 17:26:36,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 558 transitions, 11142 flow [2024-06-20 17:26:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:26:36,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 17:26:36,490 INFO L175 Difference]: Start difference. First operand has 375 places, 528 transitions, 9772 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:26:36,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 558 transitions, 11142 flow [2024-06-20 17:26:41,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 558 transitions, 11043 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:26:41,348 INFO L231 Difference]: Finished difference. Result has 379 places, 530 transitions, 9867 flow [2024-06-20 17:26:41,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9673, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9867, PETRI_PLACES=379, PETRI_TRANSITIONS=530} [2024-06-20 17:26:41,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-20 17:26:41,348 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 530 transitions, 9867 flow [2024-06-20 17:26:41,349 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) [2024-06-20 17:26:41,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:41,349 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] [2024-06-20 17:26:41,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:26:41,349 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:41,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:41,349 INFO L85 PathProgramCache]: Analyzing trace with hash -243446549, now seen corresponding path program 16 times [2024-06-20 17:26:41,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:41,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341438484] [2024-06-20 17:26:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:41,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:44,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:44,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341438484] [2024-06-20 17:26:44,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341438484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:44,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:44,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:44,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953578627] [2024-06-20 17:26:44,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:44,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:44,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:44,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:44,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:44,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:44,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 530 transitions, 9867 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) [2024-06-20 17:26:44,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:44,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:44,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:48,379 INFO L124 PetriNetUnfolderBase]: 5579/9082 cut-off events. [2024-06-20 17:26:48,379 INFO L125 PetriNetUnfolderBase]: For 1717715/1717715 co-relation queries the response was YES. [2024-06-20 17:26:48,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104084 conditions, 9082 events. 5579/9082 cut-off events. For 1717715/1717715 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 60658 event pairs, 1512 based on Foata normal form. 12/9088 useless extension candidates. Maximal degree in co-relation 103906. Up to 8545 conditions per place. [2024-06-20 17:26:48,510 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 510 selfloop transitions, 44 changer transitions 0/559 dead transitions. [2024-06-20 17:26:48,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 559 transitions, 11201 flow [2024-06-20 17:26:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:26:48,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 17:26:48,511 INFO L175 Difference]: Start difference. First operand has 379 places, 530 transitions, 9867 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:26:48,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 559 transitions, 11201 flow [2024-06-20 17:26:53,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 559 transitions, 11055 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 17:26:53,278 INFO L231 Difference]: Finished difference. Result has 381 places, 531 transitions, 9855 flow [2024-06-20 17:26:53,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9721, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9855, PETRI_PLACES=381, PETRI_TRANSITIONS=531} [2024-06-20 17:26:53,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-20 17:26:53,279 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 531 transitions, 9855 flow [2024-06-20 17:26:53,279 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) [2024-06-20 17:26:53,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:53,279 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] [2024-06-20 17:26:53,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:26:53,280 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:26:53,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:53,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1248416689, now seen corresponding path program 17 times [2024-06-20 17:26:53,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:53,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578769229] [2024-06-20 17:26:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:53,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:55,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:55,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578769229] [2024-06-20 17:26:55,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578769229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:55,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:55,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:55,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372039584] [2024-06-20 17:26:55,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:55,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:55,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:55,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:55,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 531 transitions, 9855 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) [2024-06-20 17:26:55,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:55,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:55,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:59,459 INFO L124 PetriNetUnfolderBase]: 5551/9034 cut-off events. [2024-06-20 17:26:59,460 INFO L125 PetriNetUnfolderBase]: For 1671792/1671792 co-relation queries the response was YES. [2024-06-20 17:26:59,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102335 conditions, 9034 events. 5551/9034 cut-off events. For 1671792/1671792 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 60377 event pairs, 1561 based on Foata normal form. 12/9035 useless extension candidates. Maximal degree in co-relation 102156. Up to 8390 conditions per place. [2024-06-20 17:26:59,596 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 448 selfloop transitions, 103 changer transitions 0/556 dead transitions. [2024-06-20 17:26:59,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 556 transitions, 11342 flow [2024-06-20 17:26:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:26:59,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 17:26:59,598 INFO L175 Difference]: Start difference. First operand has 381 places, 531 transitions, 9855 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:26:59,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 556 transitions, 11342 flow [2024-06-20 17:27:03,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 556 transitions, 11206 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 17:27:04,006 INFO L231 Difference]: Finished difference. Result has 383 places, 531 transitions, 9933 flow [2024-06-20 17:27:04,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9719, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9933, PETRI_PLACES=383, PETRI_TRANSITIONS=531} [2024-06-20 17:27:04,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-20 17:27:04,006 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 531 transitions, 9933 flow [2024-06-20 17:27:04,007 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) [2024-06-20 17:27:04,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:04,007 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] [2024-06-20 17:27:04,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:27:04,007 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:04,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:04,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1256690899, now seen corresponding path program 18 times [2024-06-20 17:27:04,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:04,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701518057] [2024-06-20 17:27:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:04,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:07,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:07,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701518057] [2024-06-20 17:27:07,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701518057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:07,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:07,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:07,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639920251] [2024-06-20 17:27:07,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:07,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:07,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:07,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:07,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:07,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:07,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 531 transitions, 9933 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) [2024-06-20 17:27:07,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:07,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:07,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:10,569 INFO L124 PetriNetUnfolderBase]: 5523/8998 cut-off events. [2024-06-20 17:27:10,569 INFO L125 PetriNetUnfolderBase]: For 1626867/1626867 co-relation queries the response was YES. [2024-06-20 17:27:10,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100755 conditions, 8998 events. 5523/8998 cut-off events. For 1626867/1626867 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 60142 event pairs, 1533 based on Foata normal form. 12/8999 useless extension candidates. Maximal degree in co-relation 100575. Up to 8230 conditions per place. [2024-06-20 17:27:10,708 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 414 selfloop transitions, 137 changer transitions 0/556 dead transitions. [2024-06-20 17:27:10,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 556 transitions, 11429 flow [2024-06-20 17:27:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:27:10,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 17:27:10,710 INFO L175 Difference]: Start difference. First operand has 383 places, 531 transitions, 9933 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:27:10,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 556 transitions, 11429 flow [2024-06-20 17:27:15,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 556 transitions, 11235 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:27:15,544 INFO L231 Difference]: Finished difference. Result has 385 places, 531 transitions, 10021 flow [2024-06-20 17:27:15,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9739, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10021, PETRI_PLACES=385, PETRI_TRANSITIONS=531} [2024-06-20 17:27:15,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-20 17:27:15,544 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 531 transitions, 10021 flow [2024-06-20 17:27:15,545 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) [2024-06-20 17:27:15,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:15,545 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] [2024-06-20 17:27:15,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:27:15,545 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:15,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:15,546 INFO L85 PathProgramCache]: Analyzing trace with hash -862872655, now seen corresponding path program 19 times [2024-06-20 17:27:15,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:15,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665538468] [2024-06-20 17:27:15,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:15,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:18,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:18,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665538468] [2024-06-20 17:27:18,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665538468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:18,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:18,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:18,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915921714] [2024-06-20 17:27:18,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:18,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:18,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:18,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:18,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:18,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:18,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 531 transitions, 10021 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) [2024-06-20 17:27:18,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:18,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:18,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:22,756 INFO L124 PetriNetUnfolderBase]: 5683/9265 cut-off events. [2024-06-20 17:27:22,756 INFO L125 PetriNetUnfolderBase]: For 2109104/2109104 co-relation queries the response was YES. [2024-06-20 17:27:22,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99737 conditions, 9265 events. 5683/9265 cut-off events. For 2109104/2109104 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 62325 event pairs, 1576 based on Foata normal form. 129/9383 useless extension candidates. Maximal degree in co-relation 99556. Up to 8105 conditions per place. [2024-06-20 17:27:22,942 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 487 selfloop transitions, 54 changer transitions 19/565 dead transitions. [2024-06-20 17:27:22,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 565 transitions, 11721 flow [2024-06-20 17:27:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:27:22,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 17:27:22,944 INFO L175 Difference]: Start difference. First operand has 385 places, 531 transitions, 10021 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:27:22,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 565 transitions, 11721 flow [2024-06-20 17:27:27,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 565 transitions, 11303 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-20 17:27:27,558 INFO L231 Difference]: Finished difference. Result has 387 places, 522 transitions, 9733 flow [2024-06-20 17:27:27,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9605, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9733, PETRI_PLACES=387, PETRI_TRANSITIONS=522} [2024-06-20 17:27:27,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-20 17:27:27,568 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 522 transitions, 9733 flow [2024-06-20 17:27:27,568 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) [2024-06-20 17:27:27,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:27,568 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] [2024-06-20 17:27:27,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:27:27,569 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:27,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:27,569 INFO L85 PathProgramCache]: Analyzing trace with hash -18013113, now seen corresponding path program 20 times [2024-06-20 17:27:27,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:27,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640462829] [2024-06-20 17:27:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:27,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:30,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:30,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640462829] [2024-06-20 17:27:30,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640462829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:30,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:30,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:30,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33918097] [2024-06-20 17:27:30,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:30,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:30,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:30,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:30,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:30,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:30,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 522 transitions, 9733 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) [2024-06-20 17:27:30,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:30,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:30,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:33,631 INFO L124 PetriNetUnfolderBase]: 5350/8745 cut-off events. [2024-06-20 17:27:33,631 INFO L125 PetriNetUnfolderBase]: For 1409029/1409029 co-relation queries the response was YES. [2024-06-20 17:27:34,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93445 conditions, 8745 events. 5350/8745 cut-off events. For 1409029/1409029 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 58524 event pairs, 1409 based on Foata normal form. 12/8746 useless extension candidates. Maximal degree in co-relation 93262. Up to 7144 conditions per place. [2024-06-20 17:27:34,046 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 407 selfloop transitions, 141 changer transitions 1/554 dead transitions. [2024-06-20 17:27:34,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 554 transitions, 11581 flow [2024-06-20 17:27:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:34,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 17:27:34,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 17:27:34,047 INFO L175 Difference]: Start difference. First operand has 387 places, 522 transitions, 9733 flow. Second operand 9 states and 158 transitions. [2024-06-20 17:27:34,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 554 transitions, 11581 flow [2024-06-20 17:27:38,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 554 transitions, 11323 flow, removed 106 selfloop flow, removed 4 redundant places. [2024-06-20 17:27:38,104 INFO L231 Difference]: Finished difference. Result has 392 places, 522 transitions, 9766 flow [2024-06-20 17:27:38,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9475, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9766, PETRI_PLACES=392, PETRI_TRANSITIONS=522} [2024-06-20 17:27:38,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-20 17:27:38,105 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 522 transitions, 9766 flow [2024-06-20 17:27:38,105 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) [2024-06-20 17:27:38,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:38,105 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] [2024-06-20 17:27:38,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:27:38,105 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:38,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1356686733, now seen corresponding path program 1 times [2024-06-20 17:27:38,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:38,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218746769] [2024-06-20 17:27:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:38,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:41,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:41,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218746769] [2024-06-20 17:27:41,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218746769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:41,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:41,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:27:41,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230681314] [2024-06-20 17:27:41,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:41,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:27:41,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:41,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:27:41,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:27:41,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:41,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 522 transitions, 9766 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) [2024-06-20 17:27:41,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:41,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:41,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:44,503 INFO L124 PetriNetUnfolderBase]: 5332/8721 cut-off events. [2024-06-20 17:27:44,504 INFO L125 PetriNetUnfolderBase]: For 1342302/1342302 co-relation queries the response was YES. [2024-06-20 17:27:44,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92566 conditions, 8721 events. 5332/8721 cut-off events. For 1342302/1342302 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 58454 event pairs, 1488 based on Foata normal form. 4/8714 useless extension candidates. Maximal degree in co-relation 92381. Up to 8207 conditions per place. [2024-06-20 17:27:44,655 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 463 selfloop transitions, 67 changer transitions 1/536 dead transitions. [2024-06-20 17:27:44,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 536 transitions, 10883 flow [2024-06-20 17:27:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:27:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:27:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:27:44,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:27:44,657 INFO L175 Difference]: Start difference. First operand has 392 places, 522 transitions, 9766 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:27:44,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 536 transitions, 10883 flow [2024-06-20 17:27:50,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 536 transitions, 10454 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-20 17:27:50,420 INFO L231 Difference]: Finished difference. Result has 392 places, 522 transitions, 9495 flow [2024-06-20 17:27:50,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9337, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9495, PETRI_PLACES=392, PETRI_TRANSITIONS=522} [2024-06-20 17:27:50,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-20 17:27:50,421 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 522 transitions, 9495 flow [2024-06-20 17:27:50,421 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) [2024-06-20 17:27:50,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:50,421 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] [2024-06-20 17:27:50,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:27:50,422 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:27:50,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:50,422 INFO L85 PathProgramCache]: Analyzing trace with hash -381029963, now seen corresponding path program 1 times [2024-06-20 17:27:50,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:50,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480714667] [2024-06-20 17:27:50,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:50,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:54,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480714667] [2024-06-20 17:27:54,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480714667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:54,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:54,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:27:54,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723868368] [2024-06-20 17:27:54,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:54,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:27:54,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:54,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:27:54,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:27:54,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:54,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 522 transitions, 9495 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:54,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:54,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:54,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:58,435 INFO L124 PetriNetUnfolderBase]: 5460/8931 cut-off events. [2024-06-20 17:27:58,436 INFO L125 PetriNetUnfolderBase]: For 1588316/1588316 co-relation queries the response was YES. [2024-06-20 17:27:58,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94210 conditions, 8931 events. 5460/8931 cut-off events. For 1588316/1588316 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 60066 event pairs, 1441 based on Foata normal form. 42/8962 useless extension candidates. Maximal degree in co-relation 94024. Up to 8071 conditions per place. [2024-06-20 17:27:58,591 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 477 selfloop transitions, 57 changer transitions 18/557 dead transitions. [2024-06-20 17:27:58,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 557 transitions, 11149 flow [2024-06-20 17:27:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:27:58,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 17:27:58,592 INFO L175 Difference]: Start difference. First operand has 392 places, 522 transitions, 9495 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:27:58,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 557 transitions, 11149 flow [2024-06-20 17:28:03,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 557 transitions, 10793 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 17:28:03,163 INFO L231 Difference]: Finished difference. Result has 392 places, 519 transitions, 9286 flow [2024-06-20 17:28:03,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9139, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9286, PETRI_PLACES=392, PETRI_TRANSITIONS=519} [2024-06-20 17:28:03,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-20 17:28:03,164 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 519 transitions, 9286 flow [2024-06-20 17:28:03,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:03,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:03,164 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] [2024-06-20 17:28:03,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:28:03,165 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:03,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash -389304173, now seen corresponding path program 2 times [2024-06-20 17:28:03,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:03,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279594659] [2024-06-20 17:28:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:03,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:06,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:06,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279594659] [2024-06-20 17:28:06,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279594659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:06,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:06,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:28:06,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942544479] [2024-06-20 17:28:06,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:06,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:28:06,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:06,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:28:06,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:28:06,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:06,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 519 transitions, 9286 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:06,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:06,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:06,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:10,157 INFO L124 PetriNetUnfolderBase]: 5475/8976 cut-off events. [2024-06-20 17:28:10,157 INFO L125 PetriNetUnfolderBase]: For 1551682/1551682 co-relation queries the response was YES. [2024-06-20 17:28:10,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93620 conditions, 8976 events. 5475/8976 cut-off events. For 1551682/1551682 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 60462 event pairs, 1543 based on Foata normal form. 42/9007 useless extension candidates. Maximal degree in co-relation 93434. Up to 8186 conditions per place. [2024-06-20 17:28:10,320 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 464 selfloop transitions, 60 changer transitions 21/550 dead transitions. [2024-06-20 17:28:10,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 550 transitions, 10749 flow [2024-06-20 17:28:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:28:10,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:28:10,321 INFO L175 Difference]: Start difference. First operand has 392 places, 519 transitions, 9286 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:28:10,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 550 transitions, 10749 flow [2024-06-20 17:28:15,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 550 transitions, 10544 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:15,877 INFO L231 Difference]: Finished difference. Result has 395 places, 510 transitions, 9067 flow [2024-06-20 17:28:15,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9081, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9067, PETRI_PLACES=395, PETRI_TRANSITIONS=510} [2024-06-20 17:28:15,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-20 17:28:15,878 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 510 transitions, 9067 flow [2024-06-20 17:28:15,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:15,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:15,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:15,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:28:15,879 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:15,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:15,879 INFO L85 PathProgramCache]: Analyzing trace with hash 364322399, now seen corresponding path program 1 times [2024-06-20 17:28:15,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:15,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832393138] [2024-06-20 17:28:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:15,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:19,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832393138] [2024-06-20 17:28:19,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832393138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:19,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:19,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:19,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349779351] [2024-06-20 17:28:19,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:19,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:19,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:19,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:19,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:19,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 510 transitions, 9067 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) [2024-06-20 17:28:19,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:19,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:19,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:22,820 INFO L124 PetriNetUnfolderBase]: 5321/8742 cut-off events. [2024-06-20 17:28:22,820 INFO L125 PetriNetUnfolderBase]: For 1317647/1317647 co-relation queries the response was YES. [2024-06-20 17:28:22,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91214 conditions, 8742 events. 5321/8742 cut-off events. For 1317647/1317647 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 58821 event pairs, 1518 based on Foata normal form. 1/8741 useless extension candidates. Maximal degree in co-relation 91026. Up to 8213 conditions per place. [2024-06-20 17:28:22,962 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 488 selfloop transitions, 60 changer transitions 1/554 dead transitions. [2024-06-20 17:28:22,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 554 transitions, 10430 flow [2024-06-20 17:28:23,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:28:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:28:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-20 17:28:23,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-20 17:28:23,101 INFO L175 Difference]: Start difference. First operand has 395 places, 510 transitions, 9067 flow. Second operand 10 states and 178 transitions. [2024-06-20 17:28:23,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 554 transitions, 10430 flow