./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/thin002_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i ./goblint.2024-06-19_11-23-25.files/protection/thin002_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:36:37,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:36:37,661 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:36:37,664 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:36:37,665 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:36:37,688 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:36:37,689 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:36:37,689 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:36:37,690 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:36:37,693 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:36:37,693 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:36:37,693 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:36:37,694 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:36:37,695 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:36:37,695 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:36:37,695 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:36:37,695 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:36:37,695 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:36:37,696 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:36:37,696 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:36:37,696 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:36:37,696 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:36:37,697 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:36:37,697 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:36:37,697 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:36:37,697 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:36:37,697 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:36:37,697 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:36:37,698 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:36:37,698 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:36:37,699 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:36:37,699 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:36:37,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:36:37,699 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:36:37,700 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:36:37,700 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:36:37,700 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:36:37,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:36:37,700 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:36:37,700 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:36:37,701 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:36:37,701 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:36:37,701 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:36:37,701 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:36:37,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:36:37,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:36:37,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:36:37,971 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:36:37,971 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:36:37,972 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i [2024-06-27 21:36:38,944 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:36:39,142 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:36:39,143 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i [2024-06-27 21:36:39,154 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/177d73712/e17b8704ad9545a4872fa9d10567a120/FLAGb67b73762 [2024-06-27 21:36:39,163 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/177d73712/e17b8704ad9545a4872fa9d10567a120 [2024-06-27 21:36:39,165 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:36:39,165 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:36:39,166 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/thin002_power.opt.yml/witness.yml [2024-06-27 21:36:39,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:36:39,365 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:36:39,365 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:36:39,366 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:36:39,369 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:36:39,370 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:36:39" (1/2) ... [2024-06-27 21:36:39,370 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c18331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:36:39, skipping insertion in model container [2024-06-27 21:36:39,371 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:36:39" (1/2) ... [2024-06-27 21:36:39,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@641d936b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:36:39, skipping insertion in model container [2024-06-27 21:36:39,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:36:39" (2/2) ... [2024-06-27 21:36:39,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c18331 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:39, skipping insertion in model container [2024-06-27 21:36:39,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:36:39" (2/2) ... [2024-06-27 21:36:39,373 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:36:39,508 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:36:39,509 INFO L97 edCorrectnessWitness]: Location invariant before [L880-L880] (((((((((((((((((((((((((((((((((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (__unbuffered_p3_EAX$read_delayed_var == & z && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-27 21:36:39,510 INFO L97 edCorrectnessWitness]: Location invariant before [L882-L882] (((((((((((((((((((((((((((((((((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (__unbuffered_p3_EAX$read_delayed_var == & z && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-27 21:36:39,510 INFO L97 edCorrectnessWitness]: Location invariant before [L883-L883] (((((((((((((((((((((((((((((((((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (__unbuffered_p3_EAX$read_delayed_var == & z && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-27 21:36:39,510 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] (((((((((((((((((((((((((((((((((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (__unbuffered_p3_EAX$read_delayed_var == & z && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-27 21:36:39,510 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:36:39,510 INFO L106 edCorrectnessWitness]: ghost_update [L876-L876] multithreaded = 1; [2024-06-27 21:36:39,552 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:36:39,788 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:36:39,796 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:36:40,011 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:36:40,047 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:36:40,047 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40 WrapperNode [2024-06-27 21:36:40,048 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:36:40,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:36:40,049 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:36:40,049 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:36:40,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,128 INFO L138 Inliner]: procedures = 176, calls = 85, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2024-06-27 21:36:40,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:36:40,131 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:36:40,131 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:36:40,131 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:36:40,140 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,159 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,180 INFO L175 MemorySlicer]: Split 34 memory accesses to 2 slices as follows [2, 32]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-27 21:36:40,189 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,189 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,204 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,222 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,238 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,242 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:36:40,243 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:36:40,243 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:36:40,243 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:36:40,244 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (1/1) ... [2024-06-27 21:36:40,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:36:40,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:36:40,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:36:40,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:36:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:36:40,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:36:40,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:36:40,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:36:40,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:36:40,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:36:40,335 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:36:40,336 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:36:40,336 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:36:40,336 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:36:40,337 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:36:40,337 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:36:40,337 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 21:36:40,337 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 21:36:40,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:36:40,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:36:40,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:36:40,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:36:40,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:36:40,340 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:36:40,500 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:36:40,501 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:36:40,897 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:36:40,898 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:36:41,254 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:36:41,258 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:36:41,258 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:36:41 BoogieIcfgContainer [2024-06-27 21:36:41,258 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:36:41,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:36:41,260 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:36:41,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:36:41,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:36:39" (1/4) ... [2024-06-27 21:36:41,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a09fc72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:36:41, skipping insertion in model container [2024-06-27 21:36:41,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:36:39" (2/4) ... [2024-06-27 21:36:41,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a09fc72 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:36:41, skipping insertion in model container [2024-06-27 21:36:41,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:36:40" (3/4) ... [2024-06-27 21:36:41,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a09fc72 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:36:41, skipping insertion in model container [2024-06-27 21:36:41,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:36:41" (4/4) ... [2024-06-27 21:36:41,266 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_power.opt.i [2024-06-27 21:36:41,281 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:36:41,281 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:36:41,282 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:36:41,356 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:36:41,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-27 21:36:41,423 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-27 21:36:41,423 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:36:41,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 76 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:36:41,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-27 21:36:41,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-27 21:36:41,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:36:41,446 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;@9ec6cb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:36:41,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 21:36:41,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:36:41,452 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:36:41,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:36:41,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:41,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:36:41,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:36:41,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:41,459 INFO L85 PathProgramCache]: Analyzing trace with hash 790277491, now seen corresponding path program 1 times [2024-06-27 21:36:41,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:41,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050732403] [2024-06-27 21:36:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:41,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:43,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:43,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050732403] [2024-06-27 21:36:43,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050732403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:43,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:43,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:36:43,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390587053] [2024-06-27 21:36:43,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:43,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:36:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:36:43,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:36:43,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-27 21:36:43,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:43,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:43,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-27 21:36:43,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:44,654 INFO L124 PetriNetUnfolderBase]: 5078/7078 cut-off events. [2024-06-27 21:36:44,655 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-27 21:36:44,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14301 conditions, 7078 events. 5078/7078 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 37618 event pairs, 3622 based on Foata normal form. 1/6975 useless extension candidates. Maximal degree in co-relation 14288. Up to 7001 conditions per place. [2024-06-27 21:36:44,693 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 46 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-27 21:36:44,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 245 flow [2024-06-27 21:36:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:36:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:36:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-06-27 21:36:44,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5987654320987654 [2024-06-27 21:36:44,704 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 97 transitions. [2024-06-27 21:36:44,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 245 flow [2024-06-27 21:36:44,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 238 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:44,708 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-27 21:36:44,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-27 21:36:44,712 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-27 21:36:44,712 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-27 21:36:44,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:44,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:44,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:36:44,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:36:44,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1841733810, now seen corresponding path program 1 times [2024-06-27 21:36:44,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:44,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894472905] [2024-06-27 21:36:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:44,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:46,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:46,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894472905] [2024-06-27 21:36:46,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894472905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:46,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:46,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:36:46,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128031079] [2024-06-27 21:36:46,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:46,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:36:46,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:36:46,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:36:46,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:36:46,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:46,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:46,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:36:46,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:48,508 INFO L124 PetriNetUnfolderBase]: 8198/11283 cut-off events. [2024-06-27 21:36:48,509 INFO L125 PetriNetUnfolderBase]: For 2074/2089 co-relation queries the response was YES. [2024-06-27 21:36:48,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25896 conditions, 11283 events. 8198/11283 cut-off events. For 2074/2089 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 59469 event pairs, 4492 based on Foata normal form. 9/11282 useless extension candidates. Maximal degree in co-relation 25884. Up to 11138 conditions per place. [2024-06-27 21:36:48,555 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 66 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2024-06-27 21:36:48,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 83 transitions, 380 flow [2024-06-27 21:36:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:36:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:36:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-27 21:36:48,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-27 21:36:48,557 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 123 transitions. [2024-06-27 21:36:48,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 83 transitions, 380 flow [2024-06-27 21:36:48,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 83 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:36:48,561 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 206 flow [2024-06-27 21:36:48,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-27 21:36:48,562 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2024-06-27 21:36:48,562 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 206 flow [2024-06-27 21:36:48,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:48,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:48,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:48,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:36:48,567 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:36:48,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash -379625459, now seen corresponding path program 1 times [2024-06-27 21:36:48,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:48,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869868633] [2024-06-27 21:36:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:48,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:50,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:50,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869868633] [2024-06-27 21:36:50,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869868633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:50,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:50,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:36:50,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239979209] [2024-06-27 21:36:50,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:50,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:36:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:36:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:36:50,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:36:50,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:50,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:50,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:36:50,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:52,615 INFO L124 PetriNetUnfolderBase]: 8182/11259 cut-off events. [2024-06-27 21:36:52,615 INFO L125 PetriNetUnfolderBase]: For 5705/5765 co-relation queries the response was YES. [2024-06-27 21:36:52,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28861 conditions, 11259 events. 8182/11259 cut-off events. For 5705/5765 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 59318 event pairs, 3651 based on Foata normal form. 27/11276 useless extension candidates. Maximal degree in co-relation 28846. Up to 11060 conditions per place. [2024-06-27 21:36:52,673 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 75 selfloop transitions, 12 changer transitions 0/95 dead transitions. [2024-06-27 21:36:52,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 95 transitions, 480 flow [2024-06-27 21:36:52,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:36:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:36:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 21:36:52,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-27 21:36:52,678 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 206 flow. Second operand 5 states and 147 transitions. [2024-06-27 21:36:52,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 95 transitions, 480 flow [2024-06-27 21:36:52,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 476 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 21:36:52,683 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 252 flow [2024-06-27 21:36:52,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-27 21:36:52,684 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-27 21:36:52,684 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 252 flow [2024-06-27 21:36:52,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:52,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:52,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:52,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:36:52,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:36:52,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1493990370, now seen corresponding path program 1 times [2024-06-27 21:36:52,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:52,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321085774] [2024-06-27 21:36:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:52,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:54,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:54,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321085774] [2024-06-27 21:36:54,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321085774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:54,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:54,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:54,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768367327] [2024-06-27 21:36:54,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:54,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:54,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:54,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:36:54,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:54,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:54,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:36:54,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:56,661 INFO L124 PetriNetUnfolderBase]: 7742/10653 cut-off events. [2024-06-27 21:36:56,662 INFO L125 PetriNetUnfolderBase]: For 9948/9951 co-relation queries the response was YES. [2024-06-27 21:36:56,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29730 conditions, 10653 events. 7742/10653 cut-off events. For 9948/9951 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 56996 event pairs, 4216 based on Foata normal form. 5/10651 useless extension candidates. Maximal degree in co-relation 29711. Up to 10539 conditions per place. [2024-06-27 21:36:56,711 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 72 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2024-06-27 21:36:56,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 534 flow [2024-06-27 21:36:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:36:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:36:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 21:36:56,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 21:36:56,712 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 252 flow. Second operand 5 states and 125 transitions. [2024-06-27 21:36:56,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 534 flow [2024-06-27 21:36:56,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 498 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:56,716 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 331 flow [2024-06-27 21:36:56,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-27 21:36:56,717 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2024-06-27 21:36:56,717 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 331 flow [2024-06-27 21:36:56,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:56,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:56,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:56,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:36:56,718 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:36:56,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:56,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1927918423, now seen corresponding path program 1 times [2024-06-27 21:36:56,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:56,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381228660] [2024-06-27 21:36:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:56,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:58,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:58,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381228660] [2024-06-27 21:36:58,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381228660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:58,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:58,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:36:58,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310785701] [2024-06-27 21:36:58,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:58,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:36:58,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:58,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:36:58,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:36:58,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:36:58,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:58,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:58,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:36:58,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:00,713 INFO L124 PetriNetUnfolderBase]: 7543/10438 cut-off events. [2024-06-27 21:37:00,714 INFO L125 PetriNetUnfolderBase]: For 16298/16395 co-relation queries the response was YES. [2024-06-27 21:37:00,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32423 conditions, 10438 events. 7543/10438 cut-off events. For 16298/16395 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 56508 event pairs, 3757 based on Foata normal form. 44/10452 useless extension candidates. Maximal degree in co-relation 32401. Up to 10207 conditions per place. [2024-06-27 21:37:00,763 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 78 selfloop transitions, 26 changer transitions 0/114 dead transitions. [2024-06-27 21:37:00,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 114 transitions, 707 flow [2024-06-27 21:37:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:37:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:37:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 21:37:00,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 21:37:00,765 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 331 flow. Second operand 6 states and 162 transitions. [2024-06-27 21:37:00,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 114 transitions, 707 flow [2024-06-27 21:37:00,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 114 transitions, 697 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 21:37:00,770 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 444 flow [2024-06-27 21:37:00,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=444, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-27 21:37:00,771 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-27 21:37:00,771 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 444 flow [2024-06-27 21:37:00,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:00,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:00,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:00,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:37:00,772 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:00,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:00,773 INFO L85 PathProgramCache]: Analyzing trace with hash -596333639, now seen corresponding path program 2 times [2024-06-27 21:37:00,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:00,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360979153] [2024-06-27 21:37:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:00,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:02,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:02,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360979153] [2024-06-27 21:37:02,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360979153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:02,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:02,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:02,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169729204] [2024-06-27 21:37:02,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:02,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:02,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:02,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:02,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:02,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:37:02,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:02,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:02,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:37:02,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:05,589 INFO L124 PetriNetUnfolderBase]: 9506/13100 cut-off events. [2024-06-27 21:37:05,589 INFO L125 PetriNetUnfolderBase]: For 30755/30954 co-relation queries the response was YES. [2024-06-27 21:37:05,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43712 conditions, 13100 events. 9506/13100 cut-off events. For 30755/30954 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 70473 event pairs, 4351 based on Foata normal form. 72/13123 useless extension candidates. Maximal degree in co-relation 43687. Up to 12799 conditions per place. [2024-06-27 21:37:05,655 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 72 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-06-27 21:37:05,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 698 flow [2024-06-27 21:37:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:37:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:37:05,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-27 21:37:05,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48518518518518516 [2024-06-27 21:37:05,657 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 444 flow. Second operand 5 states and 131 transitions. [2024-06-27 21:37:05,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 698 flow [2024-06-27 21:37:05,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 653 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 21:37:05,673 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 461 flow [2024-06-27 21:37:05,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=461, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-27 21:37:05,674 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2024-06-27 21:37:05,674 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 461 flow [2024-06-27 21:37:05,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:05,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:05,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:05,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:37:05,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:05,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:05,675 INFO L85 PathProgramCache]: Analyzing trace with hash -596087375, now seen corresponding path program 1 times [2024-06-27 21:37:05,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:05,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720584391] [2024-06-27 21:37:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:05,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:07,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:07,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720584391] [2024-06-27 21:37:07,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720584391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:07,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:07,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:07,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914205224] [2024-06-27 21:37:07,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:07,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:07,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:07,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:07,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:08,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:37:08,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 461 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:08,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:08,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:37:08,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:09,955 INFO L124 PetriNetUnfolderBase]: 7757/10683 cut-off events. [2024-06-27 21:37:09,956 INFO L125 PetriNetUnfolderBase]: For 28372/28384 co-relation queries the response was YES. [2024-06-27 21:37:09,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36508 conditions, 10683 events. 7757/10683 cut-off events. For 28372/28384 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 57268 event pairs, 3902 based on Foata normal form. 14/10690 useless extension candidates. Maximal degree in co-relation 36481. Up to 10521 conditions per place. [2024-06-27 21:37:10,023 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 90 selfloop transitions, 15 changer transitions 0/112 dead transitions. [2024-06-27 21:37:10,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 776 flow [2024-06-27 21:37:10,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:37:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:37:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 21:37:10,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45987654320987653 [2024-06-27 21:37:10,026 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 461 flow. Second operand 6 states and 149 transitions. [2024-06-27 21:37:10,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 776 flow [2024-06-27 21:37:10,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 732 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:10,039 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 485 flow [2024-06-27 21:37:10,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=485, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2024-06-27 21:37:10,040 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2024-06-27 21:37:10,040 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 485 flow [2024-06-27 21:37:10,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:10,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:10,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:10,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:37:10,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:10,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash -364069267, now seen corresponding path program 1 times [2024-06-27 21:37:10,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:10,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619244151] [2024-06-27 21:37:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:10,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:12,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:12,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619244151] [2024-06-27 21:37:12,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619244151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:12,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:12,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:12,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893803769] [2024-06-27 21:37:12,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:12,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:12,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:12,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:12,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:12,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:37:12,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 485 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:12,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:12,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:37:12,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:14,772 INFO L124 PetriNetUnfolderBase]: 7784/10726 cut-off events. [2024-06-27 21:37:14,773 INFO L125 PetriNetUnfolderBase]: For 36096/36096 co-relation queries the response was YES. [2024-06-27 21:37:14,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38825 conditions, 10726 events. 7784/10726 cut-off events. For 36096/36096 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 57401 event pairs, 3855 based on Foata normal form. 3/10719 useless extension candidates. Maximal degree in co-relation 38797. Up to 10480 conditions per place. [2024-06-27 21:37:14,833 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 110 selfloop transitions, 28 changer transitions 0/145 dead transitions. [2024-06-27 21:37:14,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 145 transitions, 1049 flow [2024-06-27 21:37:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 21:37:14,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 21:37:14,835 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 485 flow. Second operand 7 states and 183 transitions. [2024-06-27 21:37:14,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 145 transitions, 1049 flow [2024-06-27 21:37:14,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 145 transitions, 1007 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:14,849 INFO L231 Difference]: Finished difference. Result has 82 places, 96 transitions, 673 flow [2024-06-27 21:37:14,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=673, PETRI_PLACES=82, PETRI_TRANSITIONS=96} [2024-06-27 21:37:14,850 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-27 21:37:14,850 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 96 transitions, 673 flow [2024-06-27 21:37:14,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:14,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:14,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:14,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:37:14,851 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:14,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:14,851 INFO L85 PathProgramCache]: Analyzing trace with hash 241135673, now seen corresponding path program 2 times [2024-06-27 21:37:14,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:14,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132543409] [2024-06-27 21:37:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:14,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:16,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132543409] [2024-06-27 21:37:16,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132543409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:16,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:16,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:16,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660901900] [2024-06-27 21:37:16,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:16,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:16,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:16,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:16,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:16,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:37:16,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 673 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:16,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:16,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:37:16,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:19,264 INFO L124 PetriNetUnfolderBase]: 7811/10777 cut-off events. [2024-06-27 21:37:19,265 INFO L125 PetriNetUnfolderBase]: For 47161/47170 co-relation queries the response was YES. [2024-06-27 21:37:19,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41975 conditions, 10777 events. 7811/10777 cut-off events. For 47161/47170 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 57859 event pairs, 3846 based on Foata normal form. 9/10779 useless extension candidates. Maximal degree in co-relation 41944. Up to 10546 conditions per place. [2024-06-27 21:37:19,332 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 125 selfloop transitions, 27 changer transitions 0/159 dead transitions. [2024-06-27 21:37:19,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 159 transitions, 1222 flow [2024-06-27 21:37:19,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 21:37:19,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2024-06-27 21:37:19,334 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 673 flow. Second operand 8 states and 205 transitions. [2024-06-27 21:37:19,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 159 transitions, 1222 flow [2024-06-27 21:37:19,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 159 transitions, 1166 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:19,359 INFO L231 Difference]: Finished difference. Result has 88 places, 102 transitions, 749 flow [2024-06-27 21:37:19,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=749, PETRI_PLACES=88, PETRI_TRANSITIONS=102} [2024-06-27 21:37:19,361 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2024-06-27 21:37:19,361 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 102 transitions, 749 flow [2024-06-27 21:37:19,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:19,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:19,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:19,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:37:19,364 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:19,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:19,364 INFO L85 PathProgramCache]: Analyzing trace with hash 241130093, now seen corresponding path program 3 times [2024-06-27 21:37:19,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:19,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423159223] [2024-06-27 21:37:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:19,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:21,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:21,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423159223] [2024-06-27 21:37:21,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423159223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:21,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:21,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:21,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947772388] [2024-06-27 21:37:21,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:21,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:21,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:21,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:21,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:37:21,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 102 transitions, 749 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:21,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:21,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:37:21,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:23,799 INFO L124 PetriNetUnfolderBase]: 7802/10761 cut-off events. [2024-06-27 21:37:23,799 INFO L125 PetriNetUnfolderBase]: For 53268/53268 co-relation queries the response was YES. [2024-06-27 21:37:23,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42444 conditions, 10761 events. 7802/10761 cut-off events. For 53268/53268 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 57733 event pairs, 3855 based on Foata normal form. 3/10754 useless extension candidates. Maximal degree in co-relation 42411. Up to 10537 conditions per place. [2024-06-27 21:37:23,854 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 105 selfloop transitions, 26 changer transitions 0/138 dead transitions. [2024-06-27 21:37:23,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 138 transitions, 1102 flow [2024-06-27 21:37:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:37:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:37:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 21:37:23,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 21:37:23,856 INFO L175 Difference]: Start difference. First operand has 88 places, 102 transitions, 749 flow. Second operand 6 states and 156 transitions. [2024-06-27 21:37:23,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 138 transitions, 1102 flow [2024-06-27 21:37:23,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 138 transitions, 1008 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:23,887 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 718 flow [2024-06-27 21:37:23,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=718, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2024-06-27 21:37:23,887 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-06-27 21:37:23,888 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 718 flow [2024-06-27 21:37:23,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:23,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:23,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:23,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:37:23,888 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:23,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:23,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1595894486, now seen corresponding path program 1 times [2024-06-27 21:37:23,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:23,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5582649] [2024-06-27 21:37:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:23,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:25,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:25,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5582649] [2024-06-27 21:37:25,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5582649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:25,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:25,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:25,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526419920] [2024-06-27 21:37:25,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:25,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:25,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:25,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:25,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:26,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:37:26,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 718 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:26,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:26,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:37:26,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:28,309 INFO L124 PetriNetUnfolderBase]: 7673/10636 cut-off events. [2024-06-27 21:37:28,309 INFO L125 PetriNetUnfolderBase]: For 69249/69296 co-relation queries the response was YES. [2024-06-27 21:37:28,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43717 conditions, 10636 events. 7673/10636 cut-off events. For 69249/69296 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 58461 event pairs, 2728 based on Foata normal form. 29/10416 useless extension candidates. Maximal degree in co-relation 43683. Up to 10061 conditions per place. [2024-06-27 21:37:28,373 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 99 selfloop transitions, 42 changer transitions 0/157 dead transitions. [2024-06-27 21:37:28,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 157 transitions, 1242 flow [2024-06-27 21:37:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 21:37:28,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-27 21:37:28,376 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 718 flow. Second operand 7 states and 188 transitions. [2024-06-27 21:37:28,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 157 transitions, 1242 flow [2024-06-27 21:37:28,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 157 transitions, 1190 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:28,410 INFO L231 Difference]: Finished difference. Result has 91 places, 108 transitions, 830 flow [2024-06-27 21:37:28,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=830, PETRI_PLACES=91, PETRI_TRANSITIONS=108} [2024-06-27 21:37:28,411 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2024-06-27 21:37:28,411 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 108 transitions, 830 flow [2024-06-27 21:37:28,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:28,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:28,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:28,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:37:28,412 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:28,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1598751446, now seen corresponding path program 2 times [2024-06-27 21:37:28,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:28,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563596412] [2024-06-27 21:37:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:28,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:30,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:30,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563596412] [2024-06-27 21:37:30,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563596412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:30,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:30,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:37:30,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197020011] [2024-06-27 21:37:30,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:30,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:37:30,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:30,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:37:30,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:37:30,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:37:30,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 108 transitions, 830 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:30,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:30,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:37:30,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:32,844 INFO L124 PetriNetUnfolderBase]: 7719/10708 cut-off events. [2024-06-27 21:37:32,845 INFO L125 PetriNetUnfolderBase]: For 85065/85138 co-relation queries the response was YES. [2024-06-27 21:37:32,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46455 conditions, 10708 events. 7719/10708 cut-off events. For 85065/85138 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 58925 event pairs, 3353 based on Foata normal form. 23/10474 useless extension candidates. Maximal degree in co-relation 46420. Up to 10266 conditions per place. [2024-06-27 21:37:32,917 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 102 selfloop transitions, 38 changer transitions 0/156 dead transitions. [2024-06-27 21:37:32,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 156 transitions, 1258 flow [2024-06-27 21:37:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:37:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:37:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 21:37:32,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-27 21:37:32,928 INFO L175 Difference]: Start difference. First operand has 91 places, 108 transitions, 830 flow. Second operand 7 states and 184 transitions. [2024-06-27 21:37:32,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 156 transitions, 1258 flow [2024-06-27 21:37:32,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 156 transitions, 1186 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:32,979 INFO L231 Difference]: Finished difference. Result has 95 places, 111 transitions, 889 flow [2024-06-27 21:37:32,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=95, PETRI_TRANSITIONS=111} [2024-06-27 21:37:32,980 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-27 21:37:32,980 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 111 transitions, 889 flow [2024-06-27 21:37:32,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:32,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:32,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:32,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:37:32,981 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:32,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:32,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1845925192, now seen corresponding path program 3 times [2024-06-27 21:37:32,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:32,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456587715] [2024-06-27 21:37:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:32,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:35,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:35,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456587715] [2024-06-27 21:37:35,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456587715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:35,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:35,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:35,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420892002] [2024-06-27 21:37:35,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:35,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:35,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:35,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:37:35,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 111 transitions, 889 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:35,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:35,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:37:35,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:38,163 INFO L124 PetriNetUnfolderBase]: 9666/13343 cut-off events. [2024-06-27 21:37:38,163 INFO L125 PetriNetUnfolderBase]: For 112927/113061 co-relation queries the response was YES. [2024-06-27 21:37:38,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57281 conditions, 13343 events. 9666/13343 cut-off events. For 112927/113061 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 72149 event pairs, 3304 based on Foata normal form. 78/13134 useless extension candidates. Maximal degree in co-relation 57244. Up to 12766 conditions per place. [2024-06-27 21:37:38,244 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 99 selfloop transitions, 34 changer transitions 0/148 dead transitions. [2024-06-27 21:37:38,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 148 transitions, 1245 flow [2024-06-27 21:37:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:37:38,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:37:38,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 21:37:38,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 21:37:38,246 INFO L175 Difference]: Start difference. First operand has 95 places, 111 transitions, 889 flow. Second operand 6 states and 156 transitions. [2024-06-27 21:37:38,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 148 transitions, 1245 flow [2024-06-27 21:37:38,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 148 transitions, 1146 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:38,340 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 874 flow [2024-06-27 21:37:38,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=874, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-06-27 21:37:38,341 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2024-06-27 21:37:38,341 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 874 flow [2024-06-27 21:37:38,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:38,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:38,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:38,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:37:38,343 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:38,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:38,343 INFO L85 PathProgramCache]: Analyzing trace with hash 358957715, now seen corresponding path program 1 times [2024-06-27 21:37:38,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:38,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483379028] [2024-06-27 21:37:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:38,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:40,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:40,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483379028] [2024-06-27 21:37:40,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483379028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:40,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:40,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:37:40,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528588178] [2024-06-27 21:37:40,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:40,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:37:40,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:37:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:37:40,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:37:40,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 874 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:40,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:40,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:37:40,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:41,797 INFO L124 PetriNetUnfolderBase]: 7463/10428 cut-off events. [2024-06-27 21:37:41,797 INFO L125 PetriNetUnfolderBase]: For 92598/92637 co-relation queries the response was YES. [2024-06-27 21:37:41,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45506 conditions, 10428 events. 7463/10428 cut-off events. For 92598/92637 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 56786 event pairs, 3495 based on Foata normal form. 39/10434 useless extension candidates. Maximal degree in co-relation 45468. Up to 10152 conditions per place. [2024-06-27 21:37:41,868 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 103 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2024-06-27 21:37:41,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 133 transitions, 1196 flow [2024-06-27 21:37:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:37:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:37:41,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 21:37:41,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-27 21:37:41,869 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 874 flow. Second operand 5 states and 124 transitions. [2024-06-27 21:37:41,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 133 transitions, 1196 flow [2024-06-27 21:37:41,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 1117 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:41,925 INFO L231 Difference]: Finished difference. Result has 96 places, 115 transitions, 885 flow [2024-06-27 21:37:41,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=885, PETRI_PLACES=96, PETRI_TRANSITIONS=115} [2024-06-27 21:37:41,926 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2024-06-27 21:37:41,926 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 115 transitions, 885 flow [2024-06-27 21:37:41,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:41,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:41,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:41,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:37:41,927 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:41,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:41,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2135609428, now seen corresponding path program 1 times [2024-06-27 21:37:41,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:41,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822411431] [2024-06-27 21:37:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:41,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:44,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:44,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822411431] [2024-06-27 21:37:44,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822411431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:44,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:44,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:44,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572708217] [2024-06-27 21:37:44,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:44,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:44,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:44,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:44,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:44,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:37:44,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 115 transitions, 885 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:44,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:44,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:37:44,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:47,447 INFO L124 PetriNetUnfolderBase]: 10242/14135 cut-off events. [2024-06-27 21:37:47,448 INFO L125 PetriNetUnfolderBase]: For 134607/134658 co-relation queries the response was YES. [2024-06-27 21:37:47,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62659 conditions, 14135 events. 10242/14135 cut-off events. For 134607/134658 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 75466 event pairs, 3014 based on Foata normal form. 48/14166 useless extension candidates. Maximal degree in co-relation 62620. Up to 13090 conditions per place. [2024-06-27 21:37:47,530 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 146 selfloop transitions, 42 changer transitions 0/194 dead transitions. [2024-06-27 21:37:47,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 194 transitions, 1633 flow [2024-06-27 21:37:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 21:37:47,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47685185185185186 [2024-06-27 21:37:47,532 INFO L175 Difference]: Start difference. First operand has 96 places, 115 transitions, 885 flow. Second operand 8 states and 206 transitions. [2024-06-27 21:37:47,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 194 transitions, 1633 flow [2024-06-27 21:37:47,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 194 transitions, 1577 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:47,609 INFO L231 Difference]: Finished difference. Result has 103 places, 126 transitions, 1064 flow [2024-06-27 21:37:47,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1064, PETRI_PLACES=103, PETRI_TRANSITIONS=126} [2024-06-27 21:37:47,610 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-27 21:37:47,610 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 126 transitions, 1064 flow [2024-06-27 21:37:47,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:47,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:47,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:47,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:37:47,611 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:47,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1978310962, now seen corresponding path program 2 times [2024-06-27 21:37:47,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:47,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668878119] [2024-06-27 21:37:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:47,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:50,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:50,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668878119] [2024-06-27 21:37:50,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668878119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:50,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:50,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:50,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621325055] [2024-06-27 21:37:50,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:50,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:50,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:50,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:50,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:50,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:37:50,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 126 transitions, 1064 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:50,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:50,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:37:50,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:52,670 INFO L124 PetriNetUnfolderBase]: 8498/11849 cut-off events. [2024-06-27 21:37:52,670 INFO L125 PetriNetUnfolderBase]: For 132180/132180 co-relation queries the response was YES. [2024-06-27 21:37:52,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56035 conditions, 11849 events. 8498/11849 cut-off events. For 132180/132180 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 65339 event pairs, 3422 based on Foata normal form. 18/11857 useless extension candidates. Maximal degree in co-relation 55993. Up to 11119 conditions per place. [2024-06-27 21:37:52,756 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 150 selfloop transitions, 38 changer transitions 0/195 dead transitions. [2024-06-27 21:37:52,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 195 transitions, 1766 flow [2024-06-27 21:37:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:52,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 21:37:52,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-27 21:37:52,759 INFO L175 Difference]: Start difference. First operand has 103 places, 126 transitions, 1064 flow. Second operand 8 states and 212 transitions. [2024-06-27 21:37:52,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 195 transitions, 1766 flow [2024-06-27 21:37:52,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 195 transitions, 1707 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:52,843 INFO L231 Difference]: Finished difference. Result has 109 places, 131 transitions, 1172 flow [2024-06-27 21:37:52,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1172, PETRI_PLACES=109, PETRI_TRANSITIONS=131} [2024-06-27 21:37:52,844 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 52 predicate places. [2024-06-27 21:37:52,844 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 131 transitions, 1172 flow [2024-06-27 21:37:52,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:52,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:52,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:52,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:37:52,845 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:52,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:52,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2046895798, now seen corresponding path program 3 times [2024-06-27 21:37:52,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:52,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025066333] [2024-06-27 21:37:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:52,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:55,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:55,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025066333] [2024-06-27 21:37:55,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025066333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:55,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:55,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:55,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860873462] [2024-06-27 21:37:55,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:55,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:55,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:55,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:55,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:55,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:37:55,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 1172 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:55,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:55,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:37:55,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:58,453 INFO L124 PetriNetUnfolderBase]: 10510/14543 cut-off events. [2024-06-27 21:37:58,453 INFO L125 PetriNetUnfolderBase]: For 173405/173456 co-relation queries the response was YES. [2024-06-27 21:37:58,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68107 conditions, 14543 events. 10510/14543 cut-off events. For 173405/173456 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 78478 event pairs, 4028 based on Foata normal form. 54/14580 useless extension candidates. Maximal degree in co-relation 68062. Up to 13954 conditions per place. [2024-06-27 21:37:58,561 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 150 selfloop transitions, 35 changer transitions 0/191 dead transitions. [2024-06-27 21:37:58,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 191 transitions, 1709 flow [2024-06-27 21:37:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 21:37:58,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 21:37:58,563 INFO L175 Difference]: Start difference. First operand has 109 places, 131 transitions, 1172 flow. Second operand 8 states and 200 transitions. [2024-06-27 21:37:58,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 191 transitions, 1709 flow [2024-06-27 21:37:58,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 191 transitions, 1638 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:58,712 INFO L231 Difference]: Finished difference. Result has 113 places, 132 transitions, 1195 flow [2024-06-27 21:37:58,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1195, PETRI_PLACES=113, PETRI_TRANSITIONS=132} [2024-06-27 21:37:58,713 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2024-06-27 21:37:58,713 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 132 transitions, 1195 flow [2024-06-27 21:37:58,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:58,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:58,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:58,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:37:58,714 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:37:58,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash -196800712, now seen corresponding path program 4 times [2024-06-27 21:37:58,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:58,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346017569] [2024-06-27 21:37:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:58,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:01,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:01,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346017569] [2024-06-27 21:38:01,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346017569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:01,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:01,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:01,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423347465] [2024-06-27 21:38:01,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:01,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:01,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:01,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:01,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:01,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:38:01,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 132 transitions, 1195 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:01,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:01,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:38:01,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:03,995 INFO L124 PetriNetUnfolderBase]: 8600/12011 cut-off events. [2024-06-27 21:38:03,995 INFO L125 PetriNetUnfolderBase]: For 157974/157983 co-relation queries the response was YES. [2024-06-27 21:38:04,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58558 conditions, 12011 events. 8600/12011 cut-off events. For 157974/157983 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 66507 event pairs, 3453 based on Foata normal form. 30/12034 useless extension candidates. Maximal degree in co-relation 58511. Up to 11551 conditions per place. [2024-06-27 21:38:04,088 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 165 selfloop transitions, 29 changer transitions 0/201 dead transitions. [2024-06-27 21:38:04,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 201 transitions, 1794 flow [2024-06-27 21:38:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:04,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 21:38:04,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-27 21:38:04,090 INFO L175 Difference]: Start difference. First operand has 113 places, 132 transitions, 1195 flow. Second operand 9 states and 228 transitions. [2024-06-27 21:38:04,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 201 transitions, 1794 flow [2024-06-27 21:38:04,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 201 transitions, 1724 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:04,391 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 1233 flow [2024-06-27 21:38:04,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1233, PETRI_PLACES=116, PETRI_TRANSITIONS=134} [2024-06-27 21:38:04,392 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2024-06-27 21:38:04,392 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 1233 flow [2024-06-27 21:38:04,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:04,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:04,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:04,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:38:04,393 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:04,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:04,394 INFO L85 PathProgramCache]: Analyzing trace with hash -202163092, now seen corresponding path program 5 times [2024-06-27 21:38:04,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:04,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347009908] [2024-06-27 21:38:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:04,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:06,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:06,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347009908] [2024-06-27 21:38:06,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347009908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:06,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:06,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:06,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235337197] [2024-06-27 21:38:06,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:06,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:06,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:06,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:06,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:06,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:38:06,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 1233 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:06,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:06,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:38:06,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:09,675 INFO L124 PetriNetUnfolderBase]: 8697/12178 cut-off events. [2024-06-27 21:38:09,675 INFO L125 PetriNetUnfolderBase]: For 173727/173727 co-relation queries the response was YES. [2024-06-27 21:38:09,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60101 conditions, 12178 events. 8697/12178 cut-off events. For 173727/173727 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 67779 event pairs, 3489 based on Foata normal form. 24/12192 useless extension candidates. Maximal degree in co-relation 60053. Up to 11702 conditions per place. [2024-06-27 21:38:09,762 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 150 selfloop transitions, 28 changer transitions 0/185 dead transitions. [2024-06-27 21:38:09,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 185 transitions, 1760 flow [2024-06-27 21:38:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:38:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:38:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 21:38:09,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 21:38:09,765 INFO L175 Difference]: Start difference. First operand has 116 places, 134 transitions, 1233 flow. Second operand 7 states and 182 transitions. [2024-06-27 21:38:09,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 185 transitions, 1760 flow [2024-06-27 21:38:09,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 185 transitions, 1690 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:09,913 INFO L231 Difference]: Finished difference. Result has 116 places, 136 transitions, 1273 flow [2024-06-27 21:38:09,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1273, PETRI_PLACES=116, PETRI_TRANSITIONS=136} [2024-06-27 21:38:09,914 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2024-06-27 21:38:09,914 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 136 transitions, 1273 flow [2024-06-27 21:38:09,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:09,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:09,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:09,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:38:09,915 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:09,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:09,915 INFO L85 PathProgramCache]: Analyzing trace with hash -587315826, now seen corresponding path program 6 times [2024-06-27 21:38:09,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:09,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358572837] [2024-06-27 21:38:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:09,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:12,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:12,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358572837] [2024-06-27 21:38:12,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358572837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:12,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:12,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:12,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643918585] [2024-06-27 21:38:12,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:12,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:12,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:12,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:12,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:38:12,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 136 transitions, 1273 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:12,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:12,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:38:12,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:15,402 INFO L124 PetriNetUnfolderBase]: 10724/14893 cut-off events. [2024-06-27 21:38:15,402 INFO L125 PetriNetUnfolderBase]: For 223508/223559 co-relation queries the response was YES. [2024-06-27 21:38:15,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72353 conditions, 14893 events. 10724/14893 cut-off events. For 223508/223559 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 81035 event pairs, 3340 based on Foata normal form. 48/14924 useless extension candidates. Maximal degree in co-relation 72304. Up to 13894 conditions per place. [2024-06-27 21:38:15,499 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 149 selfloop transitions, 36 changer transitions 0/191 dead transitions. [2024-06-27 21:38:15,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 191 transitions, 1806 flow [2024-06-27 21:38:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:38:15,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:38:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 21:38:15,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 21:38:15,501 INFO L175 Difference]: Start difference. First operand has 116 places, 136 transitions, 1273 flow. Second operand 7 states and 180 transitions. [2024-06-27 21:38:15,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 191 transitions, 1806 flow [2024-06-27 21:38:15,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 191 transitions, 1722 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:15,697 INFO L231 Difference]: Finished difference. Result has 119 places, 138 transitions, 1307 flow [2024-06-27 21:38:15,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1307, PETRI_PLACES=119, PETRI_TRANSITIONS=138} [2024-06-27 21:38:15,698 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-06-27 21:38:15,698 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 138 transitions, 1307 flow [2024-06-27 21:38:15,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:15,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:15,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:15,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:38:15,699 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:15,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash -196585510, now seen corresponding path program 1 times [2024-06-27 21:38:15,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:15,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55942211] [2024-06-27 21:38:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:15,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:18,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:18,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55942211] [2024-06-27 21:38:18,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55942211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:18,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:18,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:18,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264329193] [2024-06-27 21:38:18,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:18,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:18,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:18,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:18,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:18,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:38:18,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 138 transitions, 1307 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:18,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:18,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:38:18,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:20,987 INFO L124 PetriNetUnfolderBase]: 8619/12068 cut-off events. [2024-06-27 21:38:20,988 INFO L125 PetriNetUnfolderBase]: For 195765/195774 co-relation queries the response was YES. [2024-06-27 21:38:21,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60580 conditions, 12068 events. 8619/12068 cut-off events. For 195765/195774 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 66890 event pairs, 3278 based on Foata normal form. 24/12085 useless extension candidates. Maximal degree in co-relation 60529. Up to 11214 conditions per place. [2024-06-27 21:38:21,086 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 166 selfloop transitions, 36 changer transitions 0/209 dead transitions. [2024-06-27 21:38:21,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 209 transitions, 1888 flow [2024-06-27 21:38:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 21:38:21,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4711934156378601 [2024-06-27 21:38:21,088 INFO L175 Difference]: Start difference. First operand has 119 places, 138 transitions, 1307 flow. Second operand 9 states and 229 transitions. [2024-06-27 21:38:21,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 209 transitions, 1888 flow [2024-06-27 21:38:21,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 209 transitions, 1755 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:21,253 INFO L231 Difference]: Finished difference. Result has 121 places, 139 transitions, 1247 flow [2024-06-27 21:38:21,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1247, PETRI_PLACES=121, PETRI_TRANSITIONS=139} [2024-06-27 21:38:21,254 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-27 21:38:21,254 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 139 transitions, 1247 flow [2024-06-27 21:38:21,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:21,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:21,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:21,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:38:21,255 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:21,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:21,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1757210862, now seen corresponding path program 1 times [2024-06-27 21:38:21,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:21,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325204513] [2024-06-27 21:38:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:21,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:23,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:23,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325204513] [2024-06-27 21:38:23,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325204513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:23,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:23,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:38:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918416235] [2024-06-27 21:38:23,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:23,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:38:23,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:23,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:38:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:38:23,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:38:23,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 139 transitions, 1247 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:23,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:23,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:38:23,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:25,966 INFO L124 PetriNetUnfolderBase]: 8188/11597 cut-off events. [2024-06-27 21:38:25,966 INFO L125 PetriNetUnfolderBase]: For 207460/207470 co-relation queries the response was YES. [2024-06-27 21:38:26,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59378 conditions, 11597 events. 8188/11597 cut-off events. For 207460/207470 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65174 event pairs, 3388 based on Foata normal form. 9/11567 useless extension candidates. Maximal degree in co-relation 59327. Up to 11224 conditions per place. [2024-06-27 21:38:26,054 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 131 selfloop transitions, 22 changer transitions 0/166 dead transitions. [2024-06-27 21:38:26,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 166 transitions, 1655 flow [2024-06-27 21:38:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:38:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:38:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 21:38:26,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:38:26,056 INFO L175 Difference]: Start difference. First operand has 121 places, 139 transitions, 1247 flow. Second operand 6 states and 144 transitions. [2024-06-27 21:38:26,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 166 transitions, 1655 flow [2024-06-27 21:38:26,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 166 transitions, 1568 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:26,193 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1267 flow [2024-06-27 21:38:26,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1267, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-27 21:38:26,194 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-27 21:38:26,194 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1267 flow [2024-06-27 21:38:26,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:26,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:26,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:26,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:38:26,195 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:26,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:26,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1183542264, now seen corresponding path program 1 times [2024-06-27 21:38:26,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:26,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472761541] [2024-06-27 21:38:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:26,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:28,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:28,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472761541] [2024-06-27 21:38:28,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472761541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:28,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:28,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:38:28,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347817974] [2024-06-27 21:38:28,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:28,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:38:28,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:28,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:38:28,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:38:28,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:38:28,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1267 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:28,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:28,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:38:28,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:30,733 INFO L124 PetriNetUnfolderBase]: 8624/12083 cut-off events. [2024-06-27 21:38:30,734 INFO L125 PetriNetUnfolderBase]: For 225740/225778 co-relation queries the response was YES. [2024-06-27 21:38:30,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63635 conditions, 12083 events. 8624/12083 cut-off events. For 225740/225778 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67234 event pairs, 3391 based on Foata normal form. 20/12094 useless extension candidates. Maximal degree in co-relation 63583. Up to 11819 conditions per place. [2024-06-27 21:38:30,831 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 147 selfloop transitions, 26 changer transitions 0/180 dead transitions. [2024-06-27 21:38:30,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 180 transitions, 1883 flow [2024-06-27 21:38:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:38:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:38:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 21:38:30,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2024-06-27 21:38:30,833 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1267 flow. Second operand 6 states and 147 transitions. [2024-06-27 21:38:30,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 180 transitions, 1883 flow [2024-06-27 21:38:30,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 180 transitions, 1808 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:30,998 INFO L231 Difference]: Finished difference. Result has 122 places, 151 transitions, 1373 flow [2024-06-27 21:38:30,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1373, PETRI_PLACES=122, PETRI_TRANSITIONS=151} [2024-06-27 21:38:30,999 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2024-06-27 21:38:30,999 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 151 transitions, 1373 flow [2024-06-27 21:38:30,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:30,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:30,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:30,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:38:30,999 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:31,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:31,000 INFO L85 PathProgramCache]: Analyzing trace with hash 754021270, now seen corresponding path program 2 times [2024-06-27 21:38:31,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:31,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17396336] [2024-06-27 21:38:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:31,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:33,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:33,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17396336] [2024-06-27 21:38:33,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17396336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:33,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:33,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:38:33,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622414851] [2024-06-27 21:38:33,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:33,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:38:33,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:33,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:38:33,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:38:33,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:38:33,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 151 transitions, 1373 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:33,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:33,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:38:33,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:35,536 INFO L124 PetriNetUnfolderBase]: 8617/12074 cut-off events. [2024-06-27 21:38:35,536 INFO L125 PetriNetUnfolderBase]: For 250874/250917 co-relation queries the response was YES. [2024-06-27 21:38:35,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66107 conditions, 12074 events. 8617/12074 cut-off events. For 250874/250917 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67085 event pairs, 3391 based on Foata normal form. 23/12088 useless extension candidates. Maximal degree in co-relation 66054. Up to 11823 conditions per place. [2024-06-27 21:38:35,837 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 144 selfloop transitions, 22 changer transitions 0/173 dead transitions. [2024-06-27 21:38:35,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 173 transitions, 1759 flow [2024-06-27 21:38:35,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:38:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:38:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 21:38:35,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 21:38:35,839 INFO L175 Difference]: Start difference. First operand has 122 places, 151 transitions, 1373 flow. Second operand 5 states and 125 transitions. [2024-06-27 21:38:35,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 173 transitions, 1759 flow [2024-06-27 21:38:36,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 173 transitions, 1660 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-27 21:38:36,012 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1332 flow [2024-06-27 21:38:36,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1332, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-27 21:38:36,013 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2024-06-27 21:38:36,013 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1332 flow [2024-06-27 21:38:36,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:36,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:36,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:36,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:38:36,014 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:36,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:36,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2078413168, now seen corresponding path program 1 times [2024-06-27 21:38:36,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:36,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864309775] [2024-06-27 21:38:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:36,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:38,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:38,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864309775] [2024-06-27 21:38:38,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864309775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:38,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:38,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:38,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083420516] [2024-06-27 21:38:38,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:38,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:38,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:38,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:38,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:38,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:38:38,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1332 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:38,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:38,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:38:38,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:40,967 INFO L124 PetriNetUnfolderBase]: 8179/11590 cut-off events. [2024-06-27 21:38:40,968 INFO L125 PetriNetUnfolderBase]: For 268723/268733 co-relation queries the response was YES. [2024-06-27 21:38:41,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64606 conditions, 11590 events. 8179/11590 cut-off events. For 268723/268733 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65112 event pairs, 3323 based on Foata normal form. 13/11564 useless extension candidates. Maximal degree in co-relation 64551. Up to 11168 conditions per place. [2024-06-27 21:38:41,074 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 145 selfloop transitions, 25 changer transitions 0/183 dead transitions. [2024-06-27 21:38:41,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 183 transitions, 1796 flow [2024-06-27 21:38:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:38:41,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:38:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 21:38:41,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:38:41,076 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1332 flow. Second operand 7 states and 165 transitions. [2024-06-27 21:38:41,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 183 transitions, 1796 flow [2024-06-27 21:38:41,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 183 transitions, 1752 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:41,226 INFO L231 Difference]: Finished difference. Result has 128 places, 154 transitions, 1406 flow [2024-06-27 21:38:41,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1406, PETRI_PLACES=128, PETRI_TRANSITIONS=154} [2024-06-27 21:38:41,226 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-27 21:38:41,227 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 154 transitions, 1406 flow [2024-06-27 21:38:41,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:41,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:41,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:41,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:38:41,227 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:41,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:41,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1122702824, now seen corresponding path program 1 times [2024-06-27 21:38:41,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:41,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728333544] [2024-06-27 21:38:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:41,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:43,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:43,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728333544] [2024-06-27 21:38:43,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728333544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:43,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:43,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:43,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804335364] [2024-06-27 21:38:43,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:43,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:43,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:43,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:43,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:43,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:38:43,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 154 transitions, 1406 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:43,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:43,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:38:43,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:46,448 INFO L124 PetriNetUnfolderBase]: 10671/14848 cut-off events. [2024-06-27 21:38:46,448 INFO L125 PetriNetUnfolderBase]: For 353690/353759 co-relation queries the response was YES. [2024-06-27 21:38:46,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82531 conditions, 14848 events. 10671/14848 cut-off events. For 353690/353759 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 80996 event pairs, 3850 based on Foata normal form. 43/14882 useless extension candidates. Maximal degree in co-relation 82475. Up to 14531 conditions per place. [2024-06-27 21:38:46,560 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 171 selfloop transitions, 24 changer transitions 0/201 dead transitions. [2024-06-27 21:38:46,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 201 transitions, 1992 flow [2024-06-27 21:38:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:38:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:38:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 21:38:46,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 21:38:46,562 INFO L175 Difference]: Start difference. First operand has 128 places, 154 transitions, 1406 flow. Second operand 7 states and 163 transitions. [2024-06-27 21:38:46,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 201 transitions, 1992 flow [2024-06-27 21:38:46,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 201 transitions, 1900 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:46,829 INFO L231 Difference]: Finished difference. Result has 131 places, 163 transitions, 1491 flow [2024-06-27 21:38:46,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1491, PETRI_PLACES=131, PETRI_TRANSITIONS=163} [2024-06-27 21:38:46,830 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 74 predicate places. [2024-06-27 21:38:46,830 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 163 transitions, 1491 flow [2024-06-27 21:38:46,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:46,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:46,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:46,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:38:46,831 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:46,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:46,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1661222882, now seen corresponding path program 2 times [2024-06-27 21:38:46,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:46,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129359805] [2024-06-27 21:38:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:46,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:49,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:49,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129359805] [2024-06-27 21:38:49,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129359805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:49,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:49,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:49,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260689323] [2024-06-27 21:38:49,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:49,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:49,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:49,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:49,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:49,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:38:49,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 163 transitions, 1491 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:49,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:49,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:38:49,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:51,711 INFO L124 PetriNetUnfolderBase]: 10690/14866 cut-off events. [2024-06-27 21:38:51,711 INFO L125 PetriNetUnfolderBase]: For 380786/380825 co-relation queries the response was YES. [2024-06-27 21:38:51,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85274 conditions, 14866 events. 10690/14866 cut-off events. For 380786/380825 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 80746 event pairs, 3873 based on Foata normal form. 17/14869 useless extension candidates. Maximal degree in co-relation 85216. Up to 14504 conditions per place. [2024-06-27 21:38:51,853 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 164 selfloop transitions, 32 changer transitions 0/202 dead transitions. [2024-06-27 21:38:51,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 202 transitions, 2185 flow [2024-06-27 21:38:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:38:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:38:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 21:38:51,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2024-06-27 21:38:51,855 INFO L175 Difference]: Start difference. First operand has 131 places, 163 transitions, 1491 flow. Second operand 6 states and 140 transitions. [2024-06-27 21:38:51,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 202 transitions, 2185 flow [2024-06-27 21:38:52,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 202 transitions, 2098 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:52,236 INFO L231 Difference]: Finished difference. Result has 134 places, 174 transitions, 1633 flow [2024-06-27 21:38:52,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1633, PETRI_PLACES=134, PETRI_TRANSITIONS=174} [2024-06-27 21:38:52,237 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 77 predicate places. [2024-06-27 21:38:52,237 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 174 transitions, 1633 flow [2024-06-27 21:38:52,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:52,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:52,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:52,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:38:52,238 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:52,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1661211722, now seen corresponding path program 3 times [2024-06-27 21:38:52,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:52,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855345790] [2024-06-27 21:38:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:52,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:54,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:54,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855345790] [2024-06-27 21:38:54,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855345790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:54,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:54,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:54,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675109676] [2024-06-27 21:38:54,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:54,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:54,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:54,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:54,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:54,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:38:54,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 174 transitions, 1633 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:54,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:54,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:38:54,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:57,120 INFO L124 PetriNetUnfolderBase]: 10683/14864 cut-off events. [2024-06-27 21:38:57,121 INFO L125 PetriNetUnfolderBase]: For 413037/413116 co-relation queries the response was YES. [2024-06-27 21:38:57,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88323 conditions, 14864 events. 10683/14864 cut-off events. For 413037/413116 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 80964 event pairs, 3850 based on Foata normal form. 50/14905 useless extension candidates. Maximal degree in co-relation 88263. Up to 14536 conditions per place. [2024-06-27 21:38:57,255 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 175 selfloop transitions, 27 changer transitions 0/208 dead transitions. [2024-06-27 21:38:57,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 208 transitions, 2132 flow [2024-06-27 21:38:57,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:38:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:38:57,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 21:38:57,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:38:57,256 INFO L175 Difference]: Start difference. First operand has 134 places, 174 transitions, 1633 flow. Second operand 6 states and 144 transitions. [2024-06-27 21:38:57,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 208 transitions, 2132 flow [2024-06-27 21:38:57,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 208 transitions, 2006 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-27 21:38:57,629 INFO L231 Difference]: Finished difference. Result has 137 places, 175 transitions, 1588 flow [2024-06-27 21:38:57,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1588, PETRI_PLACES=137, PETRI_TRANSITIONS=175} [2024-06-27 21:38:57,630 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2024-06-27 21:38:57,630 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 175 transitions, 1588 flow [2024-06-27 21:38:57,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:57,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:57,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:57,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:38:57,631 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:38:57,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:57,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1056680826, now seen corresponding path program 1 times [2024-06-27 21:38:57,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:57,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021455779] [2024-06-27 21:38:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:57,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:59,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:59,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021455779] [2024-06-27 21:38:59,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021455779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:59,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:59,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:59,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422835507] [2024-06-27 21:38:59,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:59,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:59,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:59,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:59,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:38:59,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 175 transitions, 1588 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:59,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:59,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:38:59,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:02,526 INFO L124 PetriNetUnfolderBase]: 8662/12151 cut-off events. [2024-06-27 21:39:02,526 INFO L125 PetriNetUnfolderBase]: For 360301/360338 co-relation queries the response was YES. [2024-06-27 21:39:02,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74468 conditions, 12151 events. 8662/12151 cut-off events. For 360301/360338 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67477 event pairs, 3347 based on Foata normal form. 23/12165 useless extension candidates. Maximal degree in co-relation 74407. Up to 11860 conditions per place. [2024-06-27 21:39:02,649 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 174 selfloop transitions, 30 changer transitions 0/211 dead transitions. [2024-06-27 21:39:02,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 211 transitions, 2140 flow [2024-06-27 21:39:02,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:39:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:39:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 21:39:02,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:39:02,651 INFO L175 Difference]: Start difference. First operand has 137 places, 175 transitions, 1588 flow. Second operand 7 states and 165 transitions. [2024-06-27 21:39:02,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 211 transitions, 2140 flow [2024-06-27 21:39:02,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 211 transitions, 2090 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:39:02,894 INFO L231 Difference]: Finished difference. Result has 140 places, 179 transitions, 1681 flow [2024-06-27 21:39:02,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1681, PETRI_PLACES=140, PETRI_TRANSITIONS=179} [2024-06-27 21:39:02,897 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 83 predicate places. [2024-06-27 21:39:02,897 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 179 transitions, 1681 flow [2024-06-27 21:39:02,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:02,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:02,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:02,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:39:02,897 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:02,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:02,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1899830300, now seen corresponding path program 2 times [2024-06-27 21:39:02,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:02,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719218438] [2024-06-27 21:39:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:02,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:05,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:05,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719218438] [2024-06-27 21:39:05,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719218438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:05,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:05,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:05,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338497742] [2024-06-27 21:39:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:05,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:05,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:05,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:05,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:39:05,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 179 transitions, 1681 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:05,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:05,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:39:05,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:07,794 INFO L124 PetriNetUnfolderBase]: 8681/12176 cut-off events. [2024-06-27 21:39:07,794 INFO L125 PetriNetUnfolderBase]: For 393290/393327 co-relation queries the response was YES. [2024-06-27 21:39:07,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77321 conditions, 12176 events. 8681/12176 cut-off events. For 393290/393327 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68062 event pairs, 3347 based on Foata normal form. 23/12190 useless extension candidates. Maximal degree in co-relation 77259. Up to 11855 conditions per place. [2024-06-27 21:39:07,901 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 177 selfloop transitions, 37 changer transitions 0/221 dead transitions. [2024-06-27 21:39:07,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 221 transitions, 2455 flow [2024-06-27 21:39:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:39:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:39:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 21:39:07,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 21:39:07,903 INFO L175 Difference]: Start difference. First operand has 140 places, 179 transitions, 1681 flow. Second operand 7 states and 169 transitions. [2024-06-27 21:39:07,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 221 transitions, 2455 flow [2024-06-27 21:39:08,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 221 transitions, 2342 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:08,139 INFO L231 Difference]: Finished difference. Result has 142 places, 187 transitions, 1807 flow [2024-06-27 21:39:08,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1807, PETRI_PLACES=142, PETRI_TRANSITIONS=187} [2024-06-27 21:39:08,140 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 85 predicate places. [2024-06-27 21:39:08,140 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 187 transitions, 1807 flow [2024-06-27 21:39:08,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:08,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:08,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:08,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:39:08,141 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:08,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:08,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1899824720, now seen corresponding path program 3 times [2024-06-27 21:39:08,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:08,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010922065] [2024-06-27 21:39:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:08,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:10,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:10,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010922065] [2024-06-27 21:39:10,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010922065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:10,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:10,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:10,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178572015] [2024-06-27 21:39:10,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:10,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:10,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:10,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:10,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:39:10,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 187 transitions, 1807 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:10,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:10,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:39:10,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:12,846 INFO L124 PetriNetUnfolderBase]: 8674/12167 cut-off events. [2024-06-27 21:39:12,847 INFO L125 PetriNetUnfolderBase]: For 425821/425858 co-relation queries the response was YES. [2024-06-27 21:39:12,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79758 conditions, 12167 events. 8674/12167 cut-off events. For 425821/425858 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67890 event pairs, 3347 based on Foata normal form. 23/12181 useless extension candidates. Maximal degree in co-relation 79695. Up to 11887 conditions per place. [2024-06-27 21:39:12,964 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 181 selfloop transitions, 26 changer transitions 0/214 dead transitions. [2024-06-27 21:39:12,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 214 transitions, 2287 flow [2024-06-27 21:39:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:39:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:39:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 21:39:12,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44753086419753085 [2024-06-27 21:39:12,982 INFO L175 Difference]: Start difference. First operand has 142 places, 187 transitions, 1807 flow. Second operand 6 states and 145 transitions. [2024-06-27 21:39:12,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 214 transitions, 2287 flow [2024-06-27 21:39:13,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 214 transitions, 2144 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-27 21:39:13,293 INFO L231 Difference]: Finished difference. Result has 145 places, 187 transitions, 1725 flow [2024-06-27 21:39:13,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1725, PETRI_PLACES=145, PETRI_TRANSITIONS=187} [2024-06-27 21:39:13,294 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 88 predicate places. [2024-06-27 21:39:13,294 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 187 transitions, 1725 flow [2024-06-27 21:39:13,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:13,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:13,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:13,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:39:13,294 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:13,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:13,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2062489878, now seen corresponding path program 1 times [2024-06-27 21:39:13,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:13,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255874262] [2024-06-27 21:39:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:13,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:15,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:15,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255874262] [2024-06-27 21:39:15,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255874262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:15,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:15,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:39:15,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16361840] [2024-06-27 21:39:15,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:15,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:39:15,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:39:15,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:39:15,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-27 21:39:15,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 187 transitions, 1725 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:15,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:15,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-27 21:39:15,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:18,000 INFO L124 PetriNetUnfolderBase]: 7907/11332 cut-off events. [2024-06-27 21:39:18,001 INFO L125 PetriNetUnfolderBase]: For 474673/474733 co-relation queries the response was YES. [2024-06-27 21:39:18,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77906 conditions, 11332 events. 7907/11332 cut-off events. For 474673/474733 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 65288 event pairs, 3171 based on Foata normal form. 4/11074 useless extension candidates. Maximal degree in co-relation 77841. Up to 10656 conditions per place. [2024-06-27 21:39:18,098 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 149 selfloop transitions, 18 changer transitions 0/205 dead transitions. [2024-06-27 21:39:18,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 205 transitions, 2143 flow [2024-06-27 21:39:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:39:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:39:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 21:39:18,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2024-06-27 21:39:18,101 INFO L175 Difference]: Start difference. First operand has 145 places, 187 transitions, 1725 flow. Second operand 5 states and 121 transitions. [2024-06-27 21:39:18,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 205 transitions, 2143 flow [2024-06-27 21:39:18,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 205 transitions, 2068 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:18,333 INFO L231 Difference]: Finished difference. Result has 145 places, 191 transitions, 1754 flow [2024-06-27 21:39:18,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1754, PETRI_PLACES=145, PETRI_TRANSITIONS=191} [2024-06-27 21:39:18,334 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 88 predicate places. [2024-06-27 21:39:18,334 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 191 transitions, 1754 flow [2024-06-27 21:39:18,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:18,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:18,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:18,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:39:18,334 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:18,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:18,335 INFO L85 PathProgramCache]: Analyzing trace with hash 395263801, now seen corresponding path program 1 times [2024-06-27 21:39:18,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:18,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340895780] [2024-06-27 21:39:18,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:18,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:20,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:20,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340895780] [2024-06-27 21:39:20,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340895780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:20,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:20,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:20,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610314504] [2024-06-27 21:39:20,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:20,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:20,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:20,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:20,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:20,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:39:20,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 191 transitions, 1754 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:20,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:20,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:39:20,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:24,108 INFO L124 PetriNetUnfolderBase]: 10732/14949 cut-off events. [2024-06-27 21:39:24,109 INFO L125 PetriNetUnfolderBase]: For 566088/566156 co-relation queries the response was YES. [2024-06-27 21:39:24,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98358 conditions, 14949 events. 10732/14949 cut-off events. For 566088/566156 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 81614 event pairs, 3788 based on Foata normal form. 45/14985 useless extension candidates. Maximal degree in co-relation 98292. Up to 14603 conditions per place. [2024-06-27 21:39:24,252 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 204 selfloop transitions, 28 changer transitions 0/238 dead transitions. [2024-06-27 21:39:24,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 238 transitions, 2388 flow [2024-06-27 21:39:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 21:39:24,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212962962962963 [2024-06-27 21:39:24,272 INFO L175 Difference]: Start difference. First operand has 145 places, 191 transitions, 1754 flow. Second operand 8 states and 182 transitions. [2024-06-27 21:39:24,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 238 transitions, 2388 flow [2024-06-27 21:39:24,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 238 transitions, 2322 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 21:39:24,798 INFO L231 Difference]: Finished difference. Result has 150 places, 195 transitions, 1823 flow [2024-06-27 21:39:24,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1823, PETRI_PLACES=150, PETRI_TRANSITIONS=195} [2024-06-27 21:39:24,799 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 93 predicate places. [2024-06-27 21:39:24,799 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 195 transitions, 1823 flow [2024-06-27 21:39:24,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:24,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:24,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:24,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:39:24,800 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:24,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:24,800 INFO L85 PathProgramCache]: Analyzing trace with hash -41684259, now seen corresponding path program 2 times [2024-06-27 21:39:24,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:24,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702663590] [2024-06-27 21:39:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:24,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:27,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:27,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702663590] [2024-06-27 21:39:27,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702663590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:27,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:27,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:27,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220757769] [2024-06-27 21:39:27,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:27,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:27,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:27,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:27,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:27,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:39:27,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 195 transitions, 1823 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:27,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:27,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:39:27,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:30,829 INFO L124 PetriNetUnfolderBase]: 10751/14967 cut-off events. [2024-06-27 21:39:30,829 INFO L125 PetriNetUnfolderBase]: For 601645/601680 co-relation queries the response was YES. [2024-06-27 21:39:30,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101465 conditions, 14967 events. 10751/14967 cut-off events. For 601645/601680 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 81662 event pairs, 3811 based on Foata normal form. 17/14970 useless extension candidates. Maximal degree in co-relation 101398. Up to 14520 conditions per place. [2024-06-27 21:39:30,967 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 191 selfloop transitions, 48 changer transitions 0/245 dead transitions. [2024-06-27 21:39:30,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 245 transitions, 2683 flow [2024-06-27 21:39:30,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 21:39:30,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:39:30,969 INFO L175 Difference]: Start difference. First operand has 150 places, 195 transitions, 1823 flow. Second operand 8 states and 180 transitions. [2024-06-27 21:39:30,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 245 transitions, 2683 flow [2024-06-27 21:39:31,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 245 transitions, 2578 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:31,350 INFO L231 Difference]: Finished difference. Result has 153 places, 206 transitions, 2008 flow [2024-06-27 21:39:31,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2008, PETRI_PLACES=153, PETRI_TRANSITIONS=206} [2024-06-27 21:39:31,351 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 96 predicate places. [2024-06-27 21:39:31,351 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 206 transitions, 2008 flow [2024-06-27 21:39:31,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:31,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:31,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:31,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:39:31,352 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:31,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash -42042309, now seen corresponding path program 3 times [2024-06-27 21:39:31,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:31,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146037264] [2024-06-27 21:39:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:34,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:34,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146037264] [2024-06-27 21:39:34,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146037264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:34,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:34,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:34,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711165826] [2024-06-27 21:39:34,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:34,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:34,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:34,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:34,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:34,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:39:34,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 206 transitions, 2008 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:34,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:34,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:39:34,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:38,151 INFO L124 PetriNetUnfolderBase]: 10744/14965 cut-off events. [2024-06-27 21:39:38,151 INFO L125 PetriNetUnfolderBase]: For 641352/641420 co-relation queries the response was YES. [2024-06-27 21:39:38,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104492 conditions, 14965 events. 10744/14965 cut-off events. For 641352/641420 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 81683 event pairs, 3788 based on Foata normal form. 45/15001 useless extension candidates. Maximal degree in co-relation 104423. Up to 14597 conditions per place. [2024-06-27 21:39:38,293 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 204 selfloop transitions, 35 changer transitions 0/245 dead transitions. [2024-06-27 21:39:38,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 245 transitions, 2595 flow [2024-06-27 21:39:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:39:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:39:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 21:39:38,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 21:39:38,295 INFO L175 Difference]: Start difference. First operand has 153 places, 206 transitions, 2008 flow. Second operand 7 states and 163 transitions. [2024-06-27 21:39:38,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 245 transitions, 2595 flow [2024-06-27 21:39:38,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 245 transitions, 2437 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-27 21:39:38,763 INFO L231 Difference]: Finished difference. Result has 156 places, 207 transitions, 1949 flow [2024-06-27 21:39:38,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1856, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1949, PETRI_PLACES=156, PETRI_TRANSITIONS=207} [2024-06-27 21:39:38,764 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 99 predicate places. [2024-06-27 21:39:38,764 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 207 transitions, 1949 flow [2024-06-27 21:39:38,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:38,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:38,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:38,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:39:38,765 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:38,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:38,765 INFO L85 PathProgramCache]: Analyzing trace with hash -785021065, now seen corresponding path program 1 times [2024-06-27 21:39:38,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:38,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14328400] [2024-06-27 21:39:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:38,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:41,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:41,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14328400] [2024-06-27 21:39:41,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14328400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:41,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:41,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:41,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109066525] [2024-06-27 21:39:41,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:41,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:41,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:41,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:39:41,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 207 transitions, 1949 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:41,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:41,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:39:41,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:44,245 INFO L124 PetriNetUnfolderBase]: 8721/12232 cut-off events. [2024-06-27 21:39:44,246 INFO L125 PetriNetUnfolderBase]: For 560811/560843 co-relation queries the response was YES. [2024-06-27 21:39:44,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89134 conditions, 12232 events. 8721/12232 cut-off events. For 560811/560843 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67805 event pairs, 3131 based on Foata normal form. 22/12245 useless extension candidates. Maximal degree in co-relation 89063. Up to 11852 conditions per place. [2024-06-27 21:39:44,360 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 212 selfloop transitions, 34 changer transitions 0/253 dead transitions. [2024-06-27 21:39:44,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 253 transitions, 2835 flow [2024-06-27 21:39:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:39:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:39:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 21:39:44,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 21:39:44,362 INFO L175 Difference]: Start difference. First operand has 156 places, 207 transitions, 1949 flow. Second operand 7 states and 172 transitions. [2024-06-27 21:39:44,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 253 transitions, 2835 flow [2024-06-27 21:39:44,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 253 transitions, 2769 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:44,677 INFO L231 Difference]: Finished difference. Result has 158 places, 213 transitions, 2125 flow [2024-06-27 21:39:44,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2125, PETRI_PLACES=158, PETRI_TRANSITIONS=213} [2024-06-27 21:39:44,677 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 101 predicate places. [2024-06-27 21:39:44,677 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 213 transitions, 2125 flow [2024-06-27 21:39:44,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:44,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:44,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:44,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:39:44,678 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:44,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:44,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1959793953, now seen corresponding path program 2 times [2024-06-27 21:39:44,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:44,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710781839] [2024-06-27 21:39:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:44,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:47,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:47,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710781839] [2024-06-27 21:39:47,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710781839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:47,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:47,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:47,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383171704] [2024-06-27 21:39:47,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:47,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:47,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:47,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:47,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:47,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:39:47,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 213 transitions, 2125 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:47,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:47,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:39:47,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:50,003 INFO L124 PetriNetUnfolderBase]: 8753/12276 cut-off events. [2024-06-27 21:39:50,004 INFO L125 PetriNetUnfolderBase]: For 599355/599387 co-relation queries the response was YES. [2024-06-27 21:39:50,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91495 conditions, 12276 events. 8753/12276 cut-off events. For 599355/599387 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68214 event pairs, 3289 based on Foata normal form. 22/12289 useless extension candidates. Maximal degree in co-relation 91423. Up to 11974 conditions per place. [2024-06-27 21:39:50,139 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 213 selfloop transitions, 29 changer transitions 0/249 dead transitions. [2024-06-27 21:39:50,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 249 transitions, 2775 flow [2024-06-27 21:39:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:39:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:39:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 21:39:50,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:39:50,141 INFO L175 Difference]: Start difference. First operand has 158 places, 213 transitions, 2125 flow. Second operand 7 states and 165 transitions. [2024-06-27 21:39:50,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 249 transitions, 2775 flow [2024-06-27 21:39:50,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 249 transitions, 2621 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-27 21:39:50,663 INFO L231 Difference]: Finished difference. Result has 162 places, 216 transitions, 2129 flow [2024-06-27 21:39:50,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2129, PETRI_PLACES=162, PETRI_TRANSITIONS=216} [2024-06-27 21:39:50,663 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 105 predicate places. [2024-06-27 21:39:50,663 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 216 transitions, 2129 flow [2024-06-27 21:39:50,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:50,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:50,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:50,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:39:50,664 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:50,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1959788993, now seen corresponding path program 1 times [2024-06-27 21:39:50,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:50,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053350527] [2024-06-27 21:39:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:50,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:53,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:53,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053350527] [2024-06-27 21:39:53,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053350527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:53,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:53,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:53,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150114384] [2024-06-27 21:39:53,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:53,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:53,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:53,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:53,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:53,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:39:53,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 216 transitions, 2129 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:53,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:53,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:39:53,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:56,636 INFO L124 PetriNetUnfolderBase]: 8772/12301 cut-off events. [2024-06-27 21:39:56,636 INFO L125 PetriNetUnfolderBase]: For 625202/625234 co-relation queries the response was YES. [2024-06-27 21:39:56,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92175 conditions, 12301 events. 8772/12301 cut-off events. For 625202/625234 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68297 event pairs, 3271 based on Foata normal form. 20/12312 useless extension candidates. Maximal degree in co-relation 92101. Up to 11999 conditions per place. [2024-06-27 21:39:56,748 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 216 selfloop transitions, 34 changer transitions 0/257 dead transitions. [2024-06-27 21:39:56,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 257 transitions, 2807 flow [2024-06-27 21:39:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 21:39:56,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42824074074074076 [2024-06-27 21:39:56,750 INFO L175 Difference]: Start difference. First operand has 162 places, 216 transitions, 2129 flow. Second operand 8 states and 185 transitions. [2024-06-27 21:39:56,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 257 transitions, 2807 flow [2024-06-27 21:39:57,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 257 transitions, 2705 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:57,120 INFO L231 Difference]: Finished difference. Result has 165 places, 220 transitions, 2200 flow [2024-06-27 21:39:57,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2027, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2200, PETRI_PLACES=165, PETRI_TRANSITIONS=220} [2024-06-27 21:39:57,120 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 108 predicate places. [2024-06-27 21:39:57,121 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 220 transitions, 2200 flow [2024-06-27 21:39:57,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:57,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:57,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:57,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:39:57,121 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:39:57,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:57,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1234978923, now seen corresponding path program 3 times [2024-06-27 21:39:57,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:57,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740094012] [2024-06-27 21:39:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:57,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:59,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:59,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740094012] [2024-06-27 21:39:59,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740094012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:59,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:59,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:59,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227642401] [2024-06-27 21:39:59,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:59,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:59,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:39:59,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 220 transitions, 2200 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:59,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:59,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:39:59,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:02,288 INFO L124 PetriNetUnfolderBase]: 8760/12285 cut-off events. [2024-06-27 21:40:02,288 INFO L125 PetriNetUnfolderBase]: For 659835/659867 co-relation queries the response was YES. [2024-06-27 21:40:02,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94324 conditions, 12285 events. 8760/12285 cut-off events. For 659835/659867 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68280 event pairs, 3111 based on Foata normal form. 22/12298 useless extension candidates. Maximal degree in co-relation 94249. Up to 11956 conditions per place. [2024-06-27 21:40:02,426 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 217 selfloop transitions, 28 changer transitions 0/252 dead transitions. [2024-06-27 21:40:02,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 252 transitions, 2768 flow [2024-06-27 21:40:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:40:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:40:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 21:40:02,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 21:40:02,428 INFO L175 Difference]: Start difference. First operand has 165 places, 220 transitions, 2200 flow. Second operand 6 states and 150 transitions. [2024-06-27 21:40:02,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 252 transitions, 2768 flow [2024-06-27 21:40:02,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 252 transitions, 2581 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 21:40:02,963 INFO L231 Difference]: Finished difference. Result has 165 places, 220 transitions, 2081 flow [2024-06-27 21:40:02,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2081, PETRI_PLACES=165, PETRI_TRANSITIONS=220} [2024-06-27 21:40:02,963 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 108 predicate places. [2024-06-27 21:40:02,963 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 220 transitions, 2081 flow [2024-06-27 21:40:02,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:02,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:02,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:02,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:40:02,964 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:02,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:02,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1234800983, now seen corresponding path program 2 times [2024-06-27 21:40:02,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:02,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985729840] [2024-06-27 21:40:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:02,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:05,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:05,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985729840] [2024-06-27 21:40:05,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985729840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:05,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:05,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:05,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713161375] [2024-06-27 21:40:05,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:05,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:05,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:05,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:05,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:05,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:40:05,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 220 transitions, 2081 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:05,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:05,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:40:05,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:08,672 INFO L124 PetriNetUnfolderBase]: 8779/12316 cut-off events. [2024-06-27 21:40:08,673 INFO L125 PetriNetUnfolderBase]: For 686977/687009 co-relation queries the response was YES. [2024-06-27 21:40:08,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95053 conditions, 12316 events. 8779/12316 cut-off events. For 686977/687009 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68599 event pairs, 3269 based on Foata normal form. 20/12327 useless extension candidates. Maximal degree in co-relation 94977. Up to 11980 conditions per place. [2024-06-27 21:40:08,794 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 213 selfloop transitions, 41 changer transitions 0/261 dead transitions. [2024-06-27 21:40:08,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 261 transitions, 2775 flow [2024-06-27 21:40:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 21:40:08,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43287037037037035 [2024-06-27 21:40:08,797 INFO L175 Difference]: Start difference. First operand has 165 places, 220 transitions, 2081 flow. Second operand 8 states and 187 transitions. [2024-06-27 21:40:08,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 261 transitions, 2775 flow [2024-06-27 21:40:09,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 261 transitions, 2709 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:09,145 INFO L231 Difference]: Finished difference. Result has 168 places, 224 transitions, 2210 flow [2024-06-27 21:40:09,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2210, PETRI_PLACES=168, PETRI_TRANSITIONS=224} [2024-06-27 21:40:09,146 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 111 predicate places. [2024-06-27 21:40:09,146 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 224 transitions, 2210 flow [2024-06-27 21:40:09,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:09,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:09,147 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] [2024-06-27 21:40:09,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:40:09,147 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:09,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:09,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1234794473, now seen corresponding path program 3 times [2024-06-27 21:40:09,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:09,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885998448] [2024-06-27 21:40:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:12,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:12,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885998448] [2024-06-27 21:40:12,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885998448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:12,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:12,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:12,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602120420] [2024-06-27 21:40:12,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:12,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:12,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:12,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:40:12,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 224 transitions, 2210 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:12,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:12,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:40:12,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:14,963 INFO L124 PetriNetUnfolderBase]: 8798/12347 cut-off events. [2024-06-27 21:40:14,963 INFO L125 PetriNetUnfolderBase]: For 735125/735157 co-relation queries the response was YES. [2024-06-27 21:40:15,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97896 conditions, 12347 events. 8798/12347 cut-off events. For 735125/735157 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68904 event pairs, 3269 based on Foata normal form. 20/12358 useless extension candidates. Maximal degree in co-relation 97819. Up to 11953 conditions per place. [2024-06-27 21:40:15,096 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 213 selfloop transitions, 56 changer transitions 0/276 dead transitions. [2024-06-27 21:40:15,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 276 transitions, 3220 flow [2024-06-27 21:40:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-27 21:40:15,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43415637860082307 [2024-06-27 21:40:15,098 INFO L175 Difference]: Start difference. First operand has 168 places, 224 transitions, 2210 flow. Second operand 9 states and 211 transitions. [2024-06-27 21:40:15,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 276 transitions, 3220 flow [2024-06-27 21:40:15,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 276 transitions, 3055 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 21:40:15,567 INFO L231 Difference]: Finished difference. Result has 171 places, 232 transitions, 2387 flow [2024-06-27 21:40:15,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2387, PETRI_PLACES=171, PETRI_TRANSITIONS=232} [2024-06-27 21:40:15,568 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 114 predicate places. [2024-06-27 21:40:15,568 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 232 transitions, 2387 flow [2024-06-27 21:40:15,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:15,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:15,568 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] [2024-06-27 21:40:15,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:40:15,568 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:15,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1234973963, now seen corresponding path program 4 times [2024-06-27 21:40:15,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:15,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441387958] [2024-06-27 21:40:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:15,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:18,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:18,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441387958] [2024-06-27 21:40:18,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441387958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:18,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:18,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:18,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482989419] [2024-06-27 21:40:18,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:18,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:18,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:18,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:18,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:18,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:40:18,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 232 transitions, 2387 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:18,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:18,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:40:18,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:20,968 INFO L124 PetriNetUnfolderBase]: 8791/12338 cut-off events. [2024-06-27 21:40:20,969 INFO L125 PetriNetUnfolderBase]: For 778030/778062 co-relation queries the response was YES. [2024-06-27 21:40:21,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100214 conditions, 12338 events. 8791/12338 cut-off events. For 778030/778062 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68801 event pairs, 3269 based on Foata normal form. 20/12349 useless extension candidates. Maximal degree in co-relation 100136. Up to 12035 conditions per place. [2024-06-27 21:40:21,103 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 227 selfloop transitions, 30 changer transitions 0/264 dead transitions. [2024-06-27 21:40:21,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 264 transitions, 2979 flow [2024-06-27 21:40:21,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:40:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:40:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 21:40:21,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:40:21,105 INFO L175 Difference]: Start difference. First operand has 171 places, 232 transitions, 2387 flow. Second operand 7 states and 165 transitions. [2024-06-27 21:40:21,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 264 transitions, 2979 flow [2024-06-27 21:40:21,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 264 transitions, 2765 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:21,737 INFO L231 Difference]: Finished difference. Result has 173 places, 232 transitions, 2242 flow [2024-06-27 21:40:21,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2242, PETRI_PLACES=173, PETRI_TRANSITIONS=232} [2024-06-27 21:40:21,737 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 116 predicate places. [2024-06-27 21:40:21,737 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 232 transitions, 2242 flow [2024-06-27 21:40:21,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:21,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:21,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:21,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:40:21,738 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:21,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:21,738 INFO L85 PathProgramCache]: Analyzing trace with hash 487325298, now seen corresponding path program 1 times [2024-06-27 21:40:21,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:21,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386503024] [2024-06-27 21:40:21,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:21,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:24,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:24,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386503024] [2024-06-27 21:40:24,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386503024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:24,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:24,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:40:24,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187103570] [2024-06-27 21:40:24,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:24,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:40:24,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:24,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:40:24,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:40:24,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-27 21:40:24,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 232 transitions, 2242 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:24,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:24,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-27 21:40:24,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:27,699 INFO L124 PetriNetUnfolderBase]: 10047/14249 cut-off events. [2024-06-27 21:40:27,699 INFO L125 PetriNetUnfolderBase]: For 996729/996870 co-relation queries the response was YES. [2024-06-27 21:40:27,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116318 conditions, 14249 events. 10047/14249 cut-off events. For 996729/996870 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 80849 event pairs, 3502 based on Foata normal form. 11/13999 useless extension candidates. Maximal degree in co-relation 116238. Up to 13339 conditions per place. [2024-06-27 21:40:27,831 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 205 selfloop transitions, 19 changer transitions 0/265 dead transitions. [2024-06-27 21:40:27,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 265 transitions, 2920 flow [2024-06-27 21:40:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:40:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:40:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-27 21:40:27,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:40:27,832 INFO L175 Difference]: Start difference. First operand has 173 places, 232 transitions, 2242 flow. Second operand 6 states and 135 transitions. [2024-06-27 21:40:27,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 265 transitions, 2920 flow [2024-06-27 21:40:28,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 265 transitions, 2821 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:40:28,367 INFO L231 Difference]: Finished difference. Result has 175 places, 249 transitions, 2428 flow [2024-06-27 21:40:28,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2428, PETRI_PLACES=175, PETRI_TRANSITIONS=249} [2024-06-27 21:40:28,368 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 118 predicate places. [2024-06-27 21:40:28,368 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 249 transitions, 2428 flow [2024-06-27 21:40:28,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:28,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:28,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:28,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:40:28,369 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:28,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:28,369 INFO L85 PathProgramCache]: Analyzing trace with hash 449940613, now seen corresponding path program 1 times [2024-06-27 21:40:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:28,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754682018] [2024-06-27 21:40:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:28,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:30,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:30,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754682018] [2024-06-27 21:40:30,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754682018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:30,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:30,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:30,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066497635] [2024-06-27 21:40:30,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:30,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:30,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:30,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:30,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:30,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:40:30,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 249 transitions, 2428 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:30,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:30,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:40:30,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:34,587 INFO L124 PetriNetUnfolderBase]: 10980/15301 cut-off events. [2024-06-27 21:40:34,587 INFO L125 PetriNetUnfolderBase]: For 977316/977392 co-relation queries the response was YES. [2024-06-27 21:40:34,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122474 conditions, 15301 events. 10980/15301 cut-off events. For 977316/977392 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 84172 event pairs, 2946 based on Foata normal form. 51/15343 useless extension candidates. Maximal degree in co-relation 122391. Up to 14827 conditions per place. [2024-06-27 21:40:34,759 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 266 selfloop transitions, 34 changer transitions 0/306 dead transitions. [2024-06-27 21:40:34,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 306 transitions, 3267 flow [2024-06-27 21:40:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 21:40:34,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43287037037037035 [2024-06-27 21:40:34,761 INFO L175 Difference]: Start difference. First operand has 175 places, 249 transitions, 2428 flow. Second operand 8 states and 187 transitions. [2024-06-27 21:40:34,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 306 transitions, 3267 flow [2024-06-27 21:40:35,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 306 transitions, 3237 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 21:40:35,699 INFO L231 Difference]: Finished difference. Result has 183 places, 256 transitions, 2603 flow [2024-06-27 21:40:35,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2603, PETRI_PLACES=183, PETRI_TRANSITIONS=256} [2024-06-27 21:40:35,700 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 126 predicate places. [2024-06-27 21:40:35,700 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 256 transitions, 2603 flow [2024-06-27 21:40:35,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:35,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:35,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:35,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:40:35,701 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:35,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:35,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1924015467, now seen corresponding path program 2 times [2024-06-27 21:40:35,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:35,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532841811] [2024-06-27 21:40:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:35,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:38,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:38,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532841811] [2024-06-27 21:40:38,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532841811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:38,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:38,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469804727] [2024-06-27 21:40:38,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:38,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:38,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:38,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:40:38,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 256 transitions, 2603 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:38,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:38,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:40:38,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:42,058 INFO L124 PetriNetUnfolderBase]: 11044/15389 cut-off events. [2024-06-27 21:40:42,058 INFO L125 PetriNetUnfolderBase]: For 1022895/1022971 co-relation queries the response was YES. [2024-06-27 21:40:42,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125546 conditions, 15389 events. 11044/15389 cut-off events. For 1022895/1022971 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 84635 event pairs, 3632 based on Foata normal form. 51/15431 useless extension candidates. Maximal degree in co-relation 125459. Up to 15003 conditions per place. [2024-06-27 21:40:42,441 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 272 selfloop transitions, 29 changer transitions 0/307 dead transitions. [2024-06-27 21:40:42,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 307 transitions, 3435 flow [2024-06-27 21:40:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 21:40:42,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212962962962963 [2024-06-27 21:40:42,443 INFO L175 Difference]: Start difference. First operand has 183 places, 256 transitions, 2603 flow. Second operand 8 states and 182 transitions. [2024-06-27 21:40:42,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 307 transitions, 3435 flow [2024-06-27 21:40:42,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 307 transitions, 3289 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:42,992 INFO L231 Difference]: Finished difference. Result has 187 places, 262 transitions, 2654 flow [2024-06-27 21:40:42,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2654, PETRI_PLACES=187, PETRI_TRANSITIONS=262} [2024-06-27 21:40:42,993 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 130 predicate places. [2024-06-27 21:40:42,993 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 262 transitions, 2654 flow [2024-06-27 21:40:42,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:42,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:42,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:42,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:40:42,994 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:42,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1924341897, now seen corresponding path program 3 times [2024-06-27 21:40:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:42,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040659577] [2024-06-27 21:40:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:45,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040659577] [2024-06-27 21:40:45,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040659577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:45,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:45,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:45,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58079269] [2024-06-27 21:40:45,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:45,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:45,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:45,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:45,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:45,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:40:45,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 262 transitions, 2654 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:45,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:45,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:40:45,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:49,051 INFO L124 PetriNetUnfolderBase]: 10382/14700 cut-off events. [2024-06-27 21:40:49,051 INFO L125 PetriNetUnfolderBase]: For 1070171/1070186 co-relation queries the response was YES. [2024-06-27 21:40:49,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125559 conditions, 14700 events. 10382/14700 cut-off events. For 1070171/1070186 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 82247 event pairs, 3614 based on Foata normal form. 13/14705 useless extension candidates. Maximal degree in co-relation 125470. Up to 14326 conditions per place. [2024-06-27 21:40:49,206 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 268 selfloop transitions, 30 changer transitions 0/308 dead transitions. [2024-06-27 21:40:49,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 308 transitions, 3444 flow [2024-06-27 21:40:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 21:40:49,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2024-06-27 21:40:49,208 INFO L175 Difference]: Start difference. First operand has 187 places, 262 transitions, 2654 flow. Second operand 8 states and 188 transitions. [2024-06-27 21:40:49,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 308 transitions, 3444 flow [2024-06-27 21:40:50,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 308 transitions, 3316 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:50,072 INFO L231 Difference]: Finished difference. Result has 190 places, 265 transitions, 2686 flow [2024-06-27 21:40:50,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2686, PETRI_PLACES=190, PETRI_TRANSITIONS=265} [2024-06-27 21:40:50,073 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 133 predicate places. [2024-06-27 21:40:50,073 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 265 transitions, 2686 flow [2024-06-27 21:40:50,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:50,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:50,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:50,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:40:50,074 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:50,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:50,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1746971367, now seen corresponding path program 1 times [2024-06-27 21:40:50,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:50,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746871776] [2024-06-27 21:40:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:50,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:52,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746871776] [2024-06-27 21:40:52,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746871776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:52,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:52,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:52,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482792155] [2024-06-27 21:40:52,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:52,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:52,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:52,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:40:52,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 265 transitions, 2686 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:52,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:52,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:40:52,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:56,756 INFO L124 PetriNetUnfolderBase]: 10420/14753 cut-off events. [2024-06-27 21:40:56,757 INFO L125 PetriNetUnfolderBase]: For 1106886/1106930 co-relation queries the response was YES. [2024-06-27 21:40:56,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128242 conditions, 14753 events. 10420/14753 cut-off events. For 1106886/1106930 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 82840 event pairs, 3654 based on Foata normal form. 17/14749 useless extension candidates. Maximal degree in co-relation 128152. Up to 14104 conditions per place. [2024-06-27 21:40:56,906 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 246 selfloop transitions, 74 changer transitions 0/330 dead transitions. [2024-06-27 21:40:56,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 330 transitions, 4144 flow [2024-06-27 21:40:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 21:40:56,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47685185185185186 [2024-06-27 21:40:56,908 INFO L175 Difference]: Start difference. First operand has 190 places, 265 transitions, 2686 flow. Second operand 8 states and 206 transitions. [2024-06-27 21:40:56,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 330 transitions, 4144 flow [2024-06-27 21:40:58,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 330 transitions, 4008 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 21:40:58,216 INFO L231 Difference]: Finished difference. Result has 192 places, 277 transitions, 3045 flow [2024-06-27 21:40:58,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3045, PETRI_PLACES=192, PETRI_TRANSITIONS=277} [2024-06-27 21:40:58,217 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 135 predicate places. [2024-06-27 21:40:58,217 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 277 transitions, 3045 flow [2024-06-27 21:40:58,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:58,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:58,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:58,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:40:58,218 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:40:58,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash 703304367, now seen corresponding path program 2 times [2024-06-27 21:40:58,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:58,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714902307] [2024-06-27 21:40:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:58,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:00,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:00,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714902307] [2024-06-27 21:41:00,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714902307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:00,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:00,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385187214] [2024-06-27 21:41:00,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:00,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:00,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:00,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:41:00,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 277 transitions, 3045 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:00,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:00,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:41:00,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:05,132 INFO L124 PetriNetUnfolderBase]: 11159/15560 cut-off events. [2024-06-27 21:41:05,133 INFO L125 PetriNetUnfolderBase]: For 1165931/1166084 co-relation queries the response was YES. [2024-06-27 21:41:05,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134038 conditions, 15560 events. 11159/15560 cut-off events. For 1165931/1166084 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 86029 event pairs, 3676 based on Foata normal form. 82/15627 useless extension candidates. Maximal degree in co-relation 133947. Up to 15024 conditions per place. [2024-06-27 21:41:05,290 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 268 selfloop transitions, 56 changer transitions 0/330 dead transitions. [2024-06-27 21:41:05,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 330 transitions, 3960 flow [2024-06-27 21:41:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:41:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:41:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 21:41:05,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:41:05,292 INFO L175 Difference]: Start difference. First operand has 192 places, 277 transitions, 3045 flow. Second operand 8 states and 189 transitions. [2024-06-27 21:41:05,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 330 transitions, 3960 flow [2024-06-27 21:41:06,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 330 transitions, 3724 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-27 21:41:06,662 INFO L231 Difference]: Finished difference. Result has 197 places, 285 transitions, 3095 flow [2024-06-27 21:41:06,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3095, PETRI_PLACES=197, PETRI_TRANSITIONS=285} [2024-06-27 21:41:06,662 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 140 predicate places. [2024-06-27 21:41:06,662 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 285 transitions, 3095 flow [2024-06-27 21:41:06,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:06,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:06,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:06,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:41:06,663 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:41:06,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:06,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1916489341, now seen corresponding path program 1 times [2024-06-27 21:41:06,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:06,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843119497] [2024-06-27 21:41:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:06,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843119497] [2024-06-27 21:41:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843119497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:08,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:08,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:08,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589015756] [2024-06-27 21:41:08,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:08,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:08,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:08,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:09,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:41:09,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 285 transitions, 3095 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:09,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:09,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:41:09,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:13,095 INFO L124 PetriNetUnfolderBase]: 11178/15585 cut-off events. [2024-06-27 21:41:13,095 INFO L125 PetriNetUnfolderBase]: For 1208077/1208230 co-relation queries the response was YES. [2024-06-27 21:41:13,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135101 conditions, 15585 events. 11178/15585 cut-off events. For 1208077/1208230 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 86182 event pairs, 3658 based on Foata normal form. 82/15652 useless extension candidates. Maximal degree in co-relation 135008. Up to 15049 conditions per place. [2024-06-27 21:41:13,258 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 272 selfloop transitions, 56 changer transitions 0/334 dead transitions. [2024-06-27 21:41:13,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 334 transitions, 3973 flow [2024-06-27 21:41:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:41:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:41:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 21:41:13,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:41:13,260 INFO L175 Difference]: Start difference. First operand has 197 places, 285 transitions, 3095 flow. Second operand 8 states and 189 transitions. [2024-06-27 21:41:13,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 334 transitions, 3973 flow [2024-06-27 21:41:14,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 334 transitions, 3796 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 21:41:14,488 INFO L231 Difference]: Finished difference. Result has 200 places, 289 transitions, 3159 flow [2024-06-27 21:41:14,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3159, PETRI_PLACES=200, PETRI_TRANSITIONS=289} [2024-06-27 21:41:14,488 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 143 predicate places. [2024-06-27 21:41:14,488 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 289 transitions, 3159 flow [2024-06-27 21:41:14,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:14,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:14,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:14,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:41:14,489 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:41:14,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1924107537, now seen corresponding path program 3 times [2024-06-27 21:41:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:14,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769621357] [2024-06-27 21:41:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:17,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:17,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769621357] [2024-06-27 21:41:17,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769621357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:17,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:17,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:41:17,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813465479] [2024-06-27 21:41:17,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:17,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:41:17,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:17,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:41:17,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:41:17,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-27 21:41:17,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 289 transitions, 3159 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:17,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:17,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-27 21:41:17,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:21,455 INFO L124 PetriNetUnfolderBase]: 10567/14976 cut-off events. [2024-06-27 21:41:21,456 INFO L125 PetriNetUnfolderBase]: For 1263876/1263934 co-relation queries the response was YES. [2024-06-27 21:41:21,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136555 conditions, 14976 events. 10567/14976 cut-off events. For 1263876/1263934 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 84324 event pairs, 3598 based on Foata normal form. 24/14987 useless extension candidates. Maximal degree in co-relation 136461. Up to 14438 conditions per place. [2024-06-27 21:41:21,670 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 271 selfloop transitions, 72 changer transitions 0/353 dead transitions. [2024-06-27 21:41:21,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 353 transitions, 4437 flow [2024-06-27 21:41:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-27 21:41:21,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382716049382716 [2024-06-27 21:41:21,672 INFO L175 Difference]: Start difference. First operand has 200 places, 289 transitions, 3159 flow. Second operand 9 states and 213 transitions. [2024-06-27 21:41:21,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 353 transitions, 4437 flow [2024-06-27 21:41:23,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 353 transitions, 4210 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 21:41:23,081 INFO L231 Difference]: Finished difference. Result has 204 places, 305 transitions, 3395 flow [2024-06-27 21:41:23,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3395, PETRI_PLACES=204, PETRI_TRANSITIONS=305} [2024-06-27 21:41:23,082 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 147 predicate places. [2024-06-27 21:41:23,082 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 305 transitions, 3395 flow [2024-06-27 21:41:23,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:23,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:23,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:23,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:41:23,083 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:41:23,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:23,083 INFO L85 PathProgramCache]: Analyzing trace with hash 880673223, now seen corresponding path program 2 times [2024-06-27 21:41:23,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:23,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924500614] [2024-06-27 21:41:23,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:23,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:25,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:25,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924500614] [2024-06-27 21:41:25,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924500614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:25,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:25,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:25,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299940138] [2024-06-27 21:41:25,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:25,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:25,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:25,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-27 21:41:25,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 305 transitions, 3395 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:25,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:25,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-27 21:41:25,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:29,580 INFO L124 PetriNetUnfolderBase]: 11306/15771 cut-off events. [2024-06-27 21:41:29,580 INFO L125 PetriNetUnfolderBase]: For 1314786/1314939 co-relation queries the response was YES. [2024-06-27 21:41:29,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140510 conditions, 15771 events. 11306/15771 cut-off events. For 1314786/1314939 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 87260 event pairs, 3658 based on Foata normal form. 82/15838 useless extension candidates. Maximal degree in co-relation 140414. Up to 15166 conditions per place. [2024-06-27 21:41:29,770 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 275 selfloop transitions, 75 changer transitions 0/356 dead transitions. [2024-06-27 21:41:29,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 356 transitions, 4635 flow [2024-06-27 21:41:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:41:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:41:29,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 21:41:29,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2024-06-27 21:41:29,772 INFO L175 Difference]: Start difference. First operand has 204 places, 305 transitions, 3395 flow. Second operand 8 states and 188 transitions. [2024-06-27 21:41:29,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 356 transitions, 4635 flow [2024-06-27 21:41:31,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 356 transitions, 4440 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-27 21:41:31,184 INFO L231 Difference]: Finished difference. Result has 209 places, 313 transitions, 3607 flow [2024-06-27 21:41:31,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3607, PETRI_PLACES=209, PETRI_TRANSITIONS=313} [2024-06-27 21:41:31,184 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 152 predicate places. [2024-06-27 21:41:31,184 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 313 transitions, 3607 flow [2024-06-27 21:41:31,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:31,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:31,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:31,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:41:31,185 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:41:31,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1924107723, now seen corresponding path program 3 times [2024-06-27 21:41:31,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:31,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609752984] [2024-06-27 21:41:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:31,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat