./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:22:46,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:22:46,918 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:22:46,923 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:22:46,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:22:46,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:22:46,943 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:22:46,943 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:22:46,944 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:22:46,944 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:22:46,944 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:22:46,945 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:22:46,945 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:22:46,945 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:22:46,946 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:22:46,946 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:22:46,946 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:22:46,946 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:22:46,947 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:22:46,947 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:22:46,947 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:22:46,948 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:22:46,948 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:22:46,949 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:22:46,953 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:22:46,953 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:22:46,954 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:22:46,954 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:22:46,954 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:22:46,955 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:22:46,955 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:22:46,955 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:22:46,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:22:46,956 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:22:46,956 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:22:46,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:22:46,956 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:22:46,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:22:46,957 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:22:46,957 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:22:46,957 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:22:46,957 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:22:46,958 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:22:46,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:22:47,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:22:47,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:22:47,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:22:47,189 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:22:47,189 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:22:47,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_rmo.oepc.yml/witness.yml [2024-06-28 00:22:47,253 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:22:47,253 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:22:47,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-28 00:22:48,253 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:22:48,469 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:22:48,469 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-28 00:22:48,479 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f5ad7089/c6d943ace3fd4fb3bf2e0d1fca53312f/FLAG7f2312a22 [2024-06-28 00:22:48,489 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f5ad7089/c6d943ace3fd4fb3bf2e0d1fca53312f [2024-06-28 00:22:48,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:22:48,493 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:22:48,497 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:22:48,498 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:22:48,502 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:22:48,502 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:22:47" (1/2) ... [2024-06-28 00:22:48,503 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd95496 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:22:48, skipping insertion in model container [2024-06-28 00:22:48,503 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:22:47" (1/2) ... [2024-06-28 00:22:48,505 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46f0a2da and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:22:48, skipping insertion in model container [2024-06-28 00:22:48,506 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:22:48" (2/2) ... [2024-06-28 00:22:48,506 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd95496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:48, skipping insertion in model container [2024-06-28 00:22:48,507 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:22:48" (2/2) ... [2024-06-28 00:22:48,507 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:22:48,532 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:22:48,533 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )y) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) [2024-06-28 00:22:48,534 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )y) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) [2024-06-28 00:22:48,534 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )y) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) [2024-06-28 00:22:48,534 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:22:48,534 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-28 00:22:48,571 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:22:48,868 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:22:48,877 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:22:49,022 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:22:49,053 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:22:49,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49 WrapperNode [2024-06-28 00:22:49,054 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:22:49,054 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:22:49,054 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:22:49,055 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:22:49,060 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,115 INFO L138 Inliner]: procedures = 175, calls = 59, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 146 [2024-06-28 00:22:49,116 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:22:49,116 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:22:49,117 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:22:49,117 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:22:49,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,130 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,157 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 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]. [2024-06-28 00:22:49,158 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,187 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,197 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,200 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,212 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:22:49,213 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:22:49,213 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:22:49,213 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:22:49,214 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (1/1) ... [2024-06-28 00:22:49,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:22:49,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:22:49,251 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) [2024-06-28 00:22:49,261 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 [2024-06-28 00:22:49,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:22:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:22:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:22:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:22:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:22:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:22:49,302 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:22:49,302 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:22:49,302 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:22:49,302 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:22:49,303 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:22:49,303 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:22:49,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:22:49,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:22:49,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:22:49,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:22:49,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:22:49,307 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:22:49,441 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:22:49,442 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:22:49,960 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:22:49,960 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:22:50,193 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:22:50,193 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:22:50,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:22:50 BoogieIcfgContainer [2024-06-28 00:22:50,194 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:22:50,197 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:22:50,197 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:22:50,199 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:22:50,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:22:47" (1/4) ... [2024-06-28 00:22:50,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4389b4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:22:50, skipping insertion in model container [2024-06-28 00:22:50,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:22:48" (2/4) ... [2024-06-28 00:22:50,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4389b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:22:50, skipping insertion in model container [2024-06-28 00:22:50,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:22:49" (3/4) ... [2024-06-28 00:22:50,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4389b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:22:50, skipping insertion in model container [2024-06-28 00:22:50,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:22:50" (4/4) ... [2024-06-28 00:22:50,204 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_rmo.oepc.i [2024-06-28 00:22:50,217 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:22:50,217 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:22:50,217 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:22:50,287 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:22:50,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:22:50,348 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 00:22:50,348 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:22:50,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:22:50,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:22:50,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 00:22:50,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:22:50,372 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;@11213bd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:22:50,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:22:50,376 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:22:50,376 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:22:50,376 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:22:50,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:50,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:22:50,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:50,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:50,380 INFO L85 PathProgramCache]: Analyzing trace with hash 518159469, now seen corresponding path program 1 times [2024-06-28 00:22:50,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:50,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560007925] [2024-06-28 00:22:50,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:50,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:52,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560007925] [2024-06-28 00:22:52,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560007925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:52,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:52,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:22:52,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937865952] [2024-06-28 00:22:52,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:52,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:22:52,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:52,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:22:52,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:22:52,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:22:52,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:52,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:52,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:22:52,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:52,550 INFO L124 PetriNetUnfolderBase]: 770/1239 cut-off events. [2024-06-28 00:22:52,550 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-28 00:22:52,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 1239 events. 770/1239 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5970 event pairs, 479 based on Foata normal form. 1/1208 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-28 00:22:52,559 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-28 00:22:52,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-28 00:22:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:22:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:22:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-28 00:22:52,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-28 00:22:52,570 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-28 00:22:52,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-28 00:22:52,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:22:52,574 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 00:22:52,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 00:22:52,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 00:22:52,577 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 00:22:52,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:52,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:52,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:22:52,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:22:52,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:52,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:52,579 INFO L85 PathProgramCache]: Analyzing trace with hash -264931220, now seen corresponding path program 1 times [2024-06-28 00:22:52,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:52,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077755175] [2024-06-28 00:22:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:52,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:54,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:54,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077755175] [2024-06-28 00:22:54,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077755175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:54,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:54,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:22:54,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595552825] [2024-06-28 00:22:54,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:54,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:22:54,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:54,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:22:54,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:22:54,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:22:54,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:54,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:54,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:22:54,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:55,244 INFO L124 PetriNetUnfolderBase]: 764/1231 cut-off events. [2024-06-28 00:22:55,244 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-28 00:22:55,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 1231 events. 764/1231 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5902 event pairs, 369 based on Foata normal form. 6/1233 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-28 00:22:55,252 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-28 00:22:55,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-28 00:22:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:22:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:22:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-28 00:22:55,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 00:22:55,256 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-28 00:22:55,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-28 00:22:55,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:22:55,259 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 00:22:55,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 00:22:55,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 00:22:55,261 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 00:22:55,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:55,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:55,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:22:55,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:22:55,267 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:55,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:55,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1584765066, now seen corresponding path program 1 times [2024-06-28 00:22:55,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:55,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991977413] [2024-06-28 00:22:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:55,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:22:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:22:58,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:22:58,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991977413] [2024-06-28 00:22:58,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991977413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:22:58,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:22:58,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:22:58,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922756580] [2024-06-28 00:22:58,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:22:58,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:22:58,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:22:58,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:22:58,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:22:58,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:22:58,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:58,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:22:58,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:22:58,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:22:58,860 INFO L124 PetriNetUnfolderBase]: 969/1526 cut-off events. [2024-06-28 00:22:58,860 INFO L125 PetriNetUnfolderBase]: For 848/863 co-relation queries the response was YES. [2024-06-28 00:22:58,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 1526 events. 969/1526 cut-off events. For 848/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7139 event pairs, 305 based on Foata normal form. 12/1531 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-28 00:22:58,869 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-28 00:22:58,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-28 00:22:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:22:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:22:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-28 00:22:58,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 00:22:58,875 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-28 00:22:58,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-28 00:22:58,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 00:22:58,878 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-28 00:22:58,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-28 00:22:58,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-28 00:22:58,879 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-28 00:22:58,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:22:58,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:22:58,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:22:58,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:22:58,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:22:58,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:22:58,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1592577857, now seen corresponding path program 1 times [2024-06-28 00:22:58,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:22:58,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649276888] [2024-06-28 00:22:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:22:58,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:22:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:00,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:00,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649276888] [2024-06-28 00:23:00,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649276888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:00,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:00,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:23:00,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295651596] [2024-06-28 00:23:00,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:00,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:23:00,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:00,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:23:00,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:23:00,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:23:00,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:00,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:00,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:23:00,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:01,590 INFO L124 PetriNetUnfolderBase]: 959/1517 cut-off events. [2024-06-28 00:23:01,590 INFO L125 PetriNetUnfolderBase]: For 1613/1633 co-relation queries the response was YES. [2024-06-28 00:23:01,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4279 conditions, 1517 events. 959/1517 cut-off events. For 1613/1633 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7122 event pairs, 368 based on Foata normal form. 14/1527 useless extension candidates. Maximal degree in co-relation 4262. Up to 1409 conditions per place. [2024-06-28 00:23:01,599 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 45 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2024-06-28 00:23:01,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 361 flow [2024-06-28 00:23:01,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:23:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:23:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-28 00:23:01,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-28 00:23:01,602 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 97 transitions. [2024-06-28 00:23:01,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 361 flow [2024-06-28 00:23:01,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 332 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 00:23:01,607 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 221 flow [2024-06-28 00:23:01,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-28 00:23:01,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-28 00:23:01,609 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 221 flow [2024-06-28 00:23:01,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:01,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:01,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:01,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:23:01,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:01,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:01,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2091310020, now seen corresponding path program 1 times [2024-06-28 00:23:01,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:01,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962382868] [2024-06-28 00:23:01,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:01,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:03,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:03,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962382868] [2024-06-28 00:23:03,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962382868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:03,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:03,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:23:03,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665571025] [2024-06-28 00:23:03,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:03,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:23:03,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:03,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:23:04,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:23:04,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:23:04,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:04,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:04,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:23:04,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:05,025 INFO L124 PetriNetUnfolderBase]: 1099/1716 cut-off events. [2024-06-28 00:23:05,025 INFO L125 PetriNetUnfolderBase]: For 2431/2433 co-relation queries the response was YES. [2024-06-28 00:23:05,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5185 conditions, 1716 events. 1099/1716 cut-off events. For 2431/2433 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8091 event pairs, 411 based on Foata normal form. 6/1721 useless extension candidates. Maximal degree in co-relation 5164. Up to 1585 conditions per place. [2024-06-28 00:23:05,036 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 61 selfloop transitions, 14 changer transitions 0/80 dead transitions. [2024-06-28 00:23:05,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 80 transitions, 485 flow [2024-06-28 00:23:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:23:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:23:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 00:23:05,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 00:23:05,041 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 221 flow. Second operand 6 states and 110 transitions. [2024-06-28 00:23:05,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 80 transitions, 485 flow [2024-06-28 00:23:05,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 466 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 00:23:05,047 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 314 flow [2024-06-28 00:23:05,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-28 00:23:05,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-28 00:23:05,050 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 314 flow [2024-06-28 00:23:05,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:05,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:05,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:05,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:23:05,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:05,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:05,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1678542765, now seen corresponding path program 1 times [2024-06-28 00:23:05,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:05,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781909698] [2024-06-28 00:23:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:07,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:07,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781909698] [2024-06-28 00:23:07,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781909698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:07,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:07,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:23:07,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538029566] [2024-06-28 00:23:07,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:07,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:23:07,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:07,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:23:07,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:23:07,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:23:07,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:07,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:07,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:23:07,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:09,111 INFO L124 PetriNetUnfolderBase]: 1121/1780 cut-off events. [2024-06-28 00:23:09,111 INFO L125 PetriNetUnfolderBase]: For 3923/3977 co-relation queries the response was YES. [2024-06-28 00:23:09,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5920 conditions, 1780 events. 1121/1780 cut-off events. For 3923/3977 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8757 event pairs, 337 based on Foata normal form. 22/1788 useless extension candidates. Maximal degree in co-relation 5893. Up to 1574 conditions per place. [2024-06-28 00:23:09,121 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 63 selfloop transitions, 30 changer transitions 0/102 dead transitions. [2024-06-28 00:23:09,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 102 transitions, 663 flow [2024-06-28 00:23:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:23:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:23:09,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:23:09,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 00:23:09,123 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 314 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:23:09,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 102 transitions, 663 flow [2024-06-28 00:23:09,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 102 transitions, 658 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 00:23:09,128 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 485 flow [2024-06-28 00:23:09,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-28 00:23:09,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-28 00:23:09,131 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 485 flow [2024-06-28 00:23:09,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:09,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:09,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:09,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:23:09,131 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:09,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:09,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1644461055, now seen corresponding path program 2 times [2024-06-28 00:23:09,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:09,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082051236] [2024-06-28 00:23:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:09,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:11,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:11,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082051236] [2024-06-28 00:23:11,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082051236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:11,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:11,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:23:11,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298947132] [2024-06-28 00:23:11,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:11,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:23:11,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:11,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:23:11,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:23:11,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:23:11,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:11,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:11,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:23:11,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:13,125 INFO L124 PetriNetUnfolderBase]: 1195/1888 cut-off events. [2024-06-28 00:23:13,126 INFO L125 PetriNetUnfolderBase]: For 6820/6865 co-relation queries the response was YES. [2024-06-28 00:23:13,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7350 conditions, 1888 events. 1195/1888 cut-off events. For 6820/6865 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9255 event pairs, 354 based on Foata normal form. 14/1888 useless extension candidates. Maximal degree in co-relation 7317. Up to 1560 conditions per place. [2024-06-28 00:23:13,139 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 63 selfloop transitions, 48 changer transitions 0/120 dead transitions. [2024-06-28 00:23:13,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 120 transitions, 944 flow [2024-06-28 00:23:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:23:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:23:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 00:23:13,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 00:23:13,141 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 485 flow. Second operand 9 states and 168 transitions. [2024-06-28 00:23:13,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 120 transitions, 944 flow [2024-06-28 00:23:13,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 930 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-28 00:23:13,149 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 715 flow [2024-06-28 00:23:13,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=715, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-28 00:23:13,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-28 00:23:13,150 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 715 flow [2024-06-28 00:23:13,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:13,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:13,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:13,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:23:13,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:13,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:13,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2080563099, now seen corresponding path program 3 times [2024-06-28 00:23:13,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:13,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601826906] [2024-06-28 00:23:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:13,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:15,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601826906] [2024-06-28 00:23:15,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601826906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:15,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:15,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:23:15,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935515007] [2024-06-28 00:23:15,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:15,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:23:15,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:15,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:23:15,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:23:15,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:23:15,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 715 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:15,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:15,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:23:15,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:16,130 INFO L124 PetriNetUnfolderBase]: 1179/1862 cut-off events. [2024-06-28 00:23:16,130 INFO L125 PetriNetUnfolderBase]: For 10930/10993 co-relation queries the response was YES. [2024-06-28 00:23:16,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8249 conditions, 1862 events. 1179/1862 cut-off events. For 10930/10993 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9085 event pairs, 354 based on Foata normal form. 29/1877 useless extension candidates. Maximal degree in co-relation 8210. Up to 1603 conditions per place. [2024-06-28 00:23:16,148 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 66 selfloop transitions, 41 changer transitions 0/116 dead transitions. [2024-06-28 00:23:16,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 1058 flow [2024-06-28 00:23:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:23:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:23:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 00:23:16,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 00:23:16,150 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 715 flow. Second operand 7 states and 128 transitions. [2024-06-28 00:23:16,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 1058 flow [2024-06-28 00:23:16,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 979 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 00:23:16,163 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 851 flow [2024-06-28 00:23:16,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=851, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-06-28 00:23:16,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-28 00:23:16,165 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 851 flow [2024-06-28 00:23:16,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:16,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:16,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:16,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:23:16,166 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:16,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:16,166 INFO L85 PathProgramCache]: Analyzing trace with hash 295815963, now seen corresponding path program 1 times [2024-06-28 00:23:16,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:16,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151415998] [2024-06-28 00:23:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:16,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:19,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:19,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151415998] [2024-06-28 00:23:19,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151415998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:19,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:19,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:23:19,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203345345] [2024-06-28 00:23:19,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:19,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:23:19,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:19,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:23:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:23:19,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:23:19,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 851 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:19,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:19,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:23:19,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:20,270 INFO L124 PetriNetUnfolderBase]: 1255/1960 cut-off events. [2024-06-28 00:23:20,270 INFO L125 PetriNetUnfolderBase]: For 13401/13409 co-relation queries the response was YES. [2024-06-28 00:23:20,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9076 conditions, 1960 events. 1255/1960 cut-off events. For 13401/13409 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9395 event pairs, 375 based on Foata normal form. 16/1975 useless extension candidates. Maximal degree in co-relation 9033. Up to 1757 conditions per place. [2024-06-28 00:23:20,283 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-28 00:23:20,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 129 transitions, 1218 flow [2024-06-28 00:23:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:23:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:23:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 00:23:20,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 00:23:20,286 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 851 flow. Second operand 8 states and 135 transitions. [2024-06-28 00:23:20,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 129 transitions, 1218 flow [2024-06-28 00:23:20,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 1143 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 00:23:20,303 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 857 flow [2024-06-28 00:23:20,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=857, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-06-28 00:23:20,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-28 00:23:20,304 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 857 flow [2024-06-28 00:23:20,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:20,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:20,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:20,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:23:20,304 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:20,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:20,305 INFO L85 PathProgramCache]: Analyzing trace with hash -495216612, now seen corresponding path program 1 times [2024-06-28 00:23:20,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:20,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266894708] [2024-06-28 00:23:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:20,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:23,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:23,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266894708] [2024-06-28 00:23:23,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266894708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:23,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:23,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:23,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837459247] [2024-06-28 00:23:23,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:23,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:23,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:23,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:23,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:23,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:23:23,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 857 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:23,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:23,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:23:23,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:24,255 INFO L124 PetriNetUnfolderBase]: 1268/1984 cut-off events. [2024-06-28 00:23:24,256 INFO L125 PetriNetUnfolderBase]: For 13547/13555 co-relation queries the response was YES. [2024-06-28 00:23:24,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9326 conditions, 1984 events. 1268/1984 cut-off events. For 13547/13555 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9556 event pairs, 388 based on Foata normal form. 10/1993 useless extension candidates. Maximal degree in co-relation 9283. Up to 1839 conditions per place. [2024-06-28 00:23:24,271 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 21 changer transitions 0/140 dead transitions. [2024-06-28 00:23:24,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 140 transitions, 1296 flow [2024-06-28 00:23:24,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:23:24,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:23:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 00:23:24,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 00:23:24,273 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 857 flow. Second operand 8 states and 136 transitions. [2024-06-28 00:23:24,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 140 transitions, 1296 flow [2024-06-28 00:23:24,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 140 transitions, 1238 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:23:24,290 INFO L231 Difference]: Finished difference. Result has 93 places, 113 transitions, 977 flow [2024-06-28 00:23:24,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=93, PETRI_TRANSITIONS=113} [2024-06-28 00:23:24,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-28 00:23:24,291 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 113 transitions, 977 flow [2024-06-28 00:23:24,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:24,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:24,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:24,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:23:24,292 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:24,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash -491491962, now seen corresponding path program 2 times [2024-06-28 00:23:24,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:24,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001622404] [2024-06-28 00:23:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:24,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:27,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:27,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001622404] [2024-06-28 00:23:27,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001622404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:27,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:27,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:27,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917557529] [2024-06-28 00:23:27,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:27,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:27,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:27,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:27,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:27,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:23:27,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 113 transitions, 977 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:27,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:27,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:23:27,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:28,623 INFO L124 PetriNetUnfolderBase]: 1281/2005 cut-off events. [2024-06-28 00:23:28,623 INFO L125 PetriNetUnfolderBase]: For 15485/15495 co-relation queries the response was YES. [2024-06-28 00:23:28,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9750 conditions, 2005 events. 1281/2005 cut-off events. For 15485/15495 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9631 event pairs, 384 based on Foata normal form. 6/2010 useless extension candidates. Maximal degree in co-relation 9704. Up to 1733 conditions per place. [2024-06-28 00:23:28,638 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 111 selfloop transitions, 37 changer transitions 0/153 dead transitions. [2024-06-28 00:23:28,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 153 transitions, 1499 flow [2024-06-28 00:23:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:23:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:23:28,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 00:23:28,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-28 00:23:28,641 INFO L175 Difference]: Start difference. First operand has 93 places, 113 transitions, 977 flow. Second operand 7 states and 132 transitions. [2024-06-28 00:23:28,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 153 transitions, 1499 flow [2024-06-28 00:23:28,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 153 transitions, 1469 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 00:23:28,661 INFO L231 Difference]: Finished difference. Result has 99 places, 124 transitions, 1148 flow [2024-06-28 00:23:28,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1148, PETRI_PLACES=99, PETRI_TRANSITIONS=124} [2024-06-28 00:23:28,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-28 00:23:28,662 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 124 transitions, 1148 flow [2024-06-28 00:23:28,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:28,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:28,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:28,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:23:28,662 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:28,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash 561316398, now seen corresponding path program 3 times [2024-06-28 00:23:28,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:28,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048167583] [2024-06-28 00:23:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:28,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:31,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:31,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048167583] [2024-06-28 00:23:31,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048167583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:31,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:31,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:31,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435857557] [2024-06-28 00:23:31,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:31,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:31,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:31,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:23:31,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 124 transitions, 1148 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:31,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:31,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:23:31,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:32,871 INFO L124 PetriNetUnfolderBase]: 1294/2030 cut-off events. [2024-06-28 00:23:32,871 INFO L125 PetriNetUnfolderBase]: For 18464/18474 co-relation queries the response was YES. [2024-06-28 00:23:32,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10445 conditions, 2030 events. 1294/2030 cut-off events. For 18464/18474 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9809 event pairs, 384 based on Foata normal form. 6/2035 useless extension candidates. Maximal degree in co-relation 10395. Up to 1747 conditions per place. [2024-06-28 00:23:32,885 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-28 00:23:32,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 157 transitions, 1635 flow [2024-06-28 00:23:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:23:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:23:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 00:23:32,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-28 00:23:32,887 INFO L175 Difference]: Start difference. First operand has 99 places, 124 transitions, 1148 flow. Second operand 7 states and 132 transitions. [2024-06-28 00:23:32,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 157 transitions, 1635 flow [2024-06-28 00:23:32,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 157 transitions, 1596 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 00:23:32,913 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1238 flow [2024-06-28 00:23:32,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1238, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2024-06-28 00:23:32,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-28 00:23:32,914 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1238 flow [2024-06-28 00:23:32,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:32,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:32,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:32,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:23:32,914 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:32,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:32,915 INFO L85 PathProgramCache]: Analyzing trace with hash 72948180, now seen corresponding path program 4 times [2024-06-28 00:23:32,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:32,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182859860] [2024-06-28 00:23:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:32,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:35,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:35,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182859860] [2024-06-28 00:23:35,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182859860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:35,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:35,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:35,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606172580] [2024-06-28 00:23:35,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:35,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:35,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:35,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:35,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:35,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:23:35,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1238 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:35,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:35,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:23:35,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:36,335 INFO L124 PetriNetUnfolderBase]: 1302/2042 cut-off events. [2024-06-28 00:23:36,335 INFO L125 PetriNetUnfolderBase]: For 20145/20155 co-relation queries the response was YES. [2024-06-28 00:23:36,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10694 conditions, 2042 events. 1302/2042 cut-off events. For 20145/20155 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9860 event pairs, 384 based on Foata normal form. 6/2047 useless extension candidates. Maximal degree in co-relation 10640. Up to 1823 conditions per place. [2024-06-28 00:23:36,350 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 115 selfloop transitions, 34 changer transitions 0/154 dead transitions. [2024-06-28 00:23:36,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 1654 flow [2024-06-28 00:23:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:23:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:23:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 00:23:36,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-28 00:23:36,352 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1238 flow. Second operand 7 states and 122 transitions. [2024-06-28 00:23:36,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 1654 flow [2024-06-28 00:23:36,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 154 transitions, 1582 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 00:23:36,379 INFO L231 Difference]: Finished difference. Result has 109 places, 134 transitions, 1337 flow [2024-06-28 00:23:36,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1337, PETRI_PLACES=109, PETRI_TRANSITIONS=134} [2024-06-28 00:23:36,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-28 00:23:36,381 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 134 transitions, 1337 flow [2024-06-28 00:23:36,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:36,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:36,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:36,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:23:36,381 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:36,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1158340436, now seen corresponding path program 1 times [2024-06-28 00:23:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:36,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605045192] [2024-06-28 00:23:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:36,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:39,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:39,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605045192] [2024-06-28 00:23:39,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605045192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:39,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:39,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:39,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945095713] [2024-06-28 00:23:39,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:39,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:39,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:39,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:39,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:39,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:23:39,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 134 transitions, 1337 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:39,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:39,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:23:39,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:41,203 INFO L124 PetriNetUnfolderBase]: 1506/2381 cut-off events. [2024-06-28 00:23:41,204 INFO L125 PetriNetUnfolderBase]: For 29857/29876 co-relation queries the response was YES. [2024-06-28 00:23:41,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12724 conditions, 2381 events. 1506/2381 cut-off events. For 29857/29876 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12293 event pairs, 347 based on Foata normal form. 31/2357 useless extension candidates. Maximal degree in co-relation 12667. Up to 1814 conditions per place. [2024-06-28 00:23:41,221 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 129 selfloop transitions, 42 changer transitions 0/192 dead transitions. [2024-06-28 00:23:41,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 192 transitions, 1951 flow [2024-06-28 00:23:41,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:23:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:23:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-28 00:23:41,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-06-28 00:23:41,223 INFO L175 Difference]: Start difference. First operand has 109 places, 134 transitions, 1337 flow. Second operand 11 states and 205 transitions. [2024-06-28 00:23:41,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 192 transitions, 1951 flow [2024-06-28 00:23:41,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 192 transitions, 1870 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:23:41,256 INFO L231 Difference]: Finished difference. Result has 116 places, 138 transitions, 1394 flow [2024-06-28 00:23:41,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1394, PETRI_PLACES=116, PETRI_TRANSITIONS=138} [2024-06-28 00:23:41,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-28 00:23:41,257 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 138 transitions, 1394 flow [2024-06-28 00:23:41,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:41,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:41,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:41,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:23:41,257 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:41,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:41,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1828150834, now seen corresponding path program 2 times [2024-06-28 00:23:41,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:41,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076533451] [2024-06-28 00:23:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:41,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:44,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:44,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076533451] [2024-06-28 00:23:44,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076533451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:44,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:44,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:44,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127986007] [2024-06-28 00:23:44,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:44,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:44,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:44,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:44,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:44,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:23:44,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 138 transitions, 1394 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:44,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:44,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:23:44,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:46,216 INFO L124 PetriNetUnfolderBase]: 1468/2333 cut-off events. [2024-06-28 00:23:46,216 INFO L125 PetriNetUnfolderBase]: For 31282/31302 co-relation queries the response was YES. [2024-06-28 00:23:46,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12777 conditions, 2333 events. 1468/2333 cut-off events. For 31282/31302 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12062 event pairs, 375 based on Foata normal form. 27/2315 useless extension candidates. Maximal degree in co-relation 12718. Up to 2006 conditions per place. [2024-06-28 00:23:46,232 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 116 selfloop transitions, 39 changer transitions 0/176 dead transitions. [2024-06-28 00:23:46,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 176 transitions, 1828 flow [2024-06-28 00:23:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:23:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:23:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 00:23:46,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-28 00:23:46,234 INFO L175 Difference]: Start difference. First operand has 116 places, 138 transitions, 1394 flow. Second operand 10 states and 179 transitions. [2024-06-28 00:23:46,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 176 transitions, 1828 flow [2024-06-28 00:23:46,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 1775 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 00:23:46,270 INFO L231 Difference]: Finished difference. Result has 119 places, 138 transitions, 1428 flow [2024-06-28 00:23:46,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1428, PETRI_PLACES=119, PETRI_TRANSITIONS=138} [2024-06-28 00:23:46,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-28 00:23:46,272 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 138 transitions, 1428 flow [2024-06-28 00:23:46,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:46,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:46,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:46,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:23:46,273 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:46,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:46,274 INFO L85 PathProgramCache]: Analyzing trace with hash 220935776, now seen corresponding path program 3 times [2024-06-28 00:23:46,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:46,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005996059] [2024-06-28 00:23:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:46,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:49,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:49,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005996059] [2024-06-28 00:23:49,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005996059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:49,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:49,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:49,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315986927] [2024-06-28 00:23:49,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:49,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:49,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:49,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:49,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:49,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:23:49,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 138 transitions, 1428 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:49,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:49,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:23:49,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:51,176 INFO L124 PetriNetUnfolderBase]: 1547/2455 cut-off events. [2024-06-28 00:23:51,176 INFO L125 PetriNetUnfolderBase]: For 35471/35498 co-relation queries the response was YES. [2024-06-28 00:23:51,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13621 conditions, 2455 events. 1547/2455 cut-off events. For 35471/35498 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12829 event pairs, 398 based on Foata normal form. 20/2427 useless extension candidates. Maximal degree in co-relation 13560. Up to 1985 conditions per place. [2024-06-28 00:23:51,194 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 89 selfloop transitions, 66 changer transitions 0/176 dead transitions. [2024-06-28 00:23:51,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 176 transitions, 1895 flow [2024-06-28 00:23:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:23:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:23:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-28 00:23:51,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-28 00:23:51,198 INFO L175 Difference]: Start difference. First operand has 119 places, 138 transitions, 1428 flow. Second operand 11 states and 194 transitions. [2024-06-28 00:23:51,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 176 transitions, 1895 flow [2024-06-28 00:23:51,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 176 transitions, 1820 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 00:23:51,231 INFO L231 Difference]: Finished difference. Result has 122 places, 139 transitions, 1506 flow [2024-06-28 00:23:51,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1506, PETRI_PLACES=122, PETRI_TRANSITIONS=139} [2024-06-28 00:23:51,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-28 00:23:51,232 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 139 transitions, 1506 flow [2024-06-28 00:23:51,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:51,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:51,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:51,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:23:51,233 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:51,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash 811340634, now seen corresponding path program 1 times [2024-06-28 00:23:51,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:51,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254330317] [2024-06-28 00:23:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:51,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:54,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:54,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254330317] [2024-06-28 00:23:54,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254330317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:54,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:54,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:54,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621514854] [2024-06-28 00:23:54,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:54,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:54,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:54,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:55,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:23:55,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 139 transitions, 1506 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:55,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:55,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:23:55,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:23:56,465 INFO L124 PetriNetUnfolderBase]: 1601/2531 cut-off events. [2024-06-28 00:23:56,465 INFO L125 PetriNetUnfolderBase]: For 33537/33551 co-relation queries the response was YES. [2024-06-28 00:23:56,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14023 conditions, 2531 events. 1601/2531 cut-off events. For 33537/33551 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13074 event pairs, 456 based on Foata normal form. 18/2548 useless extension candidates. Maximal degree in co-relation 13961. Up to 2260 conditions per place. [2024-06-28 00:23:56,479 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 25 changer transitions 0/173 dead transitions. [2024-06-28 00:23:56,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 173 transitions, 1948 flow [2024-06-28 00:23:56,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:23:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:23:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 00:23:56,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 00:23:56,481 INFO L175 Difference]: Start difference. First operand has 122 places, 139 transitions, 1506 flow. Second operand 9 states and 151 transitions. [2024-06-28 00:23:56,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 173 transitions, 1948 flow [2024-06-28 00:23:56,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 173 transitions, 1807 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-28 00:23:56,515 INFO L231 Difference]: Finished difference. Result has 122 places, 141 transitions, 1446 flow [2024-06-28 00:23:56,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1446, PETRI_PLACES=122, PETRI_TRANSITIONS=141} [2024-06-28 00:23:56,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-28 00:23:56,515 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 141 transitions, 1446 flow [2024-06-28 00:23:56,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:56,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:23:56,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:23:56,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:23:56,516 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:23:56,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:23:56,516 INFO L85 PathProgramCache]: Analyzing trace with hash 215701020, now seen corresponding path program 4 times [2024-06-28 00:23:56,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:23:56,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468174432] [2024-06-28 00:23:56,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:23:56,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:23:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:23:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:23:58,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:23:58,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468174432] [2024-06-28 00:23:58,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468174432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:23:58,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:23:58,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:23:58,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405379138] [2024-06-28 00:23:58,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:23:58,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:23:58,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:23:58,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:23:58,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:23:59,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:23:59,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 141 transitions, 1446 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:23:59,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:23:59,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:23:59,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:00,451 INFO L124 PetriNetUnfolderBase]: 1825/2895 cut-off events. [2024-06-28 00:24:00,451 INFO L125 PetriNetUnfolderBase]: For 48981/49016 co-relation queries the response was YES. [2024-06-28 00:24:00,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16452 conditions, 2895 events. 1825/2895 cut-off events. For 48981/49016 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15690 event pairs, 399 based on Foata normal form. 34/2866 useless extension candidates. Maximal degree in co-relation 16390. Up to 1904 conditions per place. [2024-06-28 00:24:00,470 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 110 selfloop transitions, 62 changer transitions 0/194 dead transitions. [2024-06-28 00:24:00,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 194 transitions, 2128 flow [2024-06-28 00:24:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 00:24:00,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-28 00:24:00,472 INFO L175 Difference]: Start difference. First operand has 122 places, 141 transitions, 1446 flow. Second operand 9 states and 178 transitions. [2024-06-28 00:24:00,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 194 transitions, 2128 flow [2024-06-28 00:24:00,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 194 transitions, 2065 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 00:24:00,510 INFO L231 Difference]: Finished difference. Result has 125 places, 149 transitions, 1655 flow [2024-06-28 00:24:00,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1655, PETRI_PLACES=125, PETRI_TRANSITIONS=149} [2024-06-28 00:24:00,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-28 00:24:00,511 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 149 transitions, 1655 flow [2024-06-28 00:24:00,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:00,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:00,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:00,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:24:00,512 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:00,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:00,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2033577094, now seen corresponding path program 5 times [2024-06-28 00:24:00,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:00,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386202390] [2024-06-28 00:24:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:00,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:02,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:02,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386202390] [2024-06-28 00:24:02,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386202390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:02,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:02,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:24:02,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540323243] [2024-06-28 00:24:02,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:02,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:24:02,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:02,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:24:02,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:24:02,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:24:02,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 149 transitions, 1655 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:02,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:02,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:24:02,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:04,291 INFO L124 PetriNetUnfolderBase]: 1777/2839 cut-off events. [2024-06-28 00:24:04,291 INFO L125 PetriNetUnfolderBase]: For 52186/52220 co-relation queries the response was YES. [2024-06-28 00:24:04,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16773 conditions, 2839 events. 1777/2839 cut-off events. For 52186/52220 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15448 event pairs, 476 based on Foata normal form. 25/2811 useless extension candidates. Maximal degree in co-relation 16709. Up to 2341 conditions per place. [2024-06-28 00:24:04,311 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 104 selfloop transitions, 54 changer transitions 0/180 dead transitions. [2024-06-28 00:24:04,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 180 transitions, 2109 flow [2024-06-28 00:24:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:24:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:24:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:24:04,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 00:24:04,313 INFO L175 Difference]: Start difference. First operand has 125 places, 149 transitions, 1655 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:24:04,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 180 transitions, 2109 flow [2024-06-28 00:24:04,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 180 transitions, 1967 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-28 00:24:04,371 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1678 flow [2024-06-28 00:24:04,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1678, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-28 00:24:04,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-28 00:24:04,372 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1678 flow [2024-06-28 00:24:04,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:04,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:04,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:04,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:24:04,373 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:04,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:04,373 INFO L85 PathProgramCache]: Analyzing trace with hash -325815780, now seen corresponding path program 6 times [2024-06-28 00:24:04,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:04,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968149928] [2024-06-28 00:24:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:04,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:06,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:06,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968149928] [2024-06-28 00:24:06,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968149928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:06,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:06,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:24:06,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134358196] [2024-06-28 00:24:06,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:06,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:24:06,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:06,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:24:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:24:06,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 00:24:06,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1678 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 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) [2024-06-28 00:24:06,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:06,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 00:24:06,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:07,415 INFO L124 PetriNetUnfolderBase]: 1465/2490 cut-off events. [2024-06-28 00:24:07,415 INFO L125 PetriNetUnfolderBase]: For 44541/44674 co-relation queries the response was YES. [2024-06-28 00:24:07,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13655 conditions, 2490 events. 1465/2490 cut-off events. For 44541/44674 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14317 event pairs, 226 based on Foata normal form. 123/2521 useless extension candidates. Maximal degree in co-relation 13592. Up to 1313 conditions per place. [2024-06-28 00:24:07,431 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 51 changer transitions 0/175 dead transitions. [2024-06-28 00:24:07,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 175 transitions, 2007 flow [2024-06-28 00:24:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:24:07,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:24:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 00:24:07,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-28 00:24:07,432 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1678 flow. Second operand 7 states and 142 transitions. [2024-06-28 00:24:07,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 175 transitions, 2007 flow [2024-06-28 00:24:07,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 175 transitions, 1886 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 00:24:07,474 INFO L231 Difference]: Finished difference. Result has 126 places, 153 transitions, 1744 flow [2024-06-28 00:24:07,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=126, PETRI_TRANSITIONS=153} [2024-06-28 00:24:07,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-28 00:24:07,475 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 153 transitions, 1744 flow [2024-06-28 00:24:07,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 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) [2024-06-28 00:24:07,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:07,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:07,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:24:07,475 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:07,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash 792393859, now seen corresponding path program 1 times [2024-06-28 00:24:07,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:07,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610880127] [2024-06-28 00:24:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:07,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:11,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:11,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610880127] [2024-06-28 00:24:11,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610880127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:11,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:11,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:11,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288008031] [2024-06-28 00:24:11,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:11,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:11,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:11,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:11,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:11,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:24:11,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 153 transitions, 1744 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:11,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:11,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:24:11,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:12,489 INFO L124 PetriNetUnfolderBase]: 1984/3174 cut-off events. [2024-06-28 00:24:12,489 INFO L125 PetriNetUnfolderBase]: For 46787/46801 co-relation queries the response was YES. [2024-06-28 00:24:12,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17767 conditions, 3174 events. 1984/3174 cut-off events. For 46787/46801 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17689 event pairs, 505 based on Foata normal form. 26/3199 useless extension candidates. Maximal degree in co-relation 17703. Up to 2659 conditions per place. [2024-06-28 00:24:12,512 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 178 selfloop transitions, 25 changer transitions 0/208 dead transitions. [2024-06-28 00:24:12,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 208 transitions, 2444 flow [2024-06-28 00:24:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:24:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:24:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-28 00:24:12,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-28 00:24:12,514 INFO L175 Difference]: Start difference. First operand has 126 places, 153 transitions, 1744 flow. Second operand 10 states and 178 transitions. [2024-06-28 00:24:12,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 208 transitions, 2444 flow [2024-06-28 00:24:12,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 208 transitions, 2361 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 00:24:12,573 INFO L231 Difference]: Finished difference. Result has 133 places, 158 transitions, 1791 flow [2024-06-28 00:24:12,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1791, PETRI_PLACES=133, PETRI_TRANSITIONS=158} [2024-06-28 00:24:12,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-28 00:24:12,574 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 158 transitions, 1791 flow [2024-06-28 00:24:12,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:12,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:12,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:12,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:24:12,574 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:12,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:12,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1879304265, now seen corresponding path program 2 times [2024-06-28 00:24:12,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:12,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623558276] [2024-06-28 00:24:12,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:12,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:16,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:16,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623558276] [2024-06-28 00:24:16,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623558276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:16,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:16,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:16,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667503589] [2024-06-28 00:24:16,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:16,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:16,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:16,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:16,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:16,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:24:16,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 158 transitions, 1791 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:16,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:16,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:24:16,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:17,767 INFO L124 PetriNetUnfolderBase]: 2024/3258 cut-off events. [2024-06-28 00:24:17,767 INFO L125 PetriNetUnfolderBase]: For 43592/43606 co-relation queries the response was YES. [2024-06-28 00:24:17,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17512 conditions, 3258 events. 2024/3258 cut-off events. For 43592/43606 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18341 event pairs, 561 based on Foata normal form. 30/3287 useless extension candidates. Maximal degree in co-relation 17447. Up to 2943 conditions per place. [2024-06-28 00:24:17,797 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 168 selfloop transitions, 22 changer transitions 0/195 dead transitions. [2024-06-28 00:24:17,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 195 transitions, 2292 flow [2024-06-28 00:24:17,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:17,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 00:24:17,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 00:24:17,799 INFO L175 Difference]: Start difference. First operand has 133 places, 158 transitions, 1791 flow. Second operand 9 states and 154 transitions. [2024-06-28 00:24:17,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 195 transitions, 2292 flow [2024-06-28 00:24:17,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 195 transitions, 2253 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 00:24:17,862 INFO L231 Difference]: Finished difference. Result has 137 places, 159 transitions, 1816 flow [2024-06-28 00:24:17,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1816, PETRI_PLACES=137, PETRI_TRANSITIONS=159} [2024-06-28 00:24:17,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-28 00:24:17,863 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 159 transitions, 1816 flow [2024-06-28 00:24:17,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:17,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:17,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:17,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:24:17,863 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:17,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:17,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1879452135, now seen corresponding path program 3 times [2024-06-28 00:24:17,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:17,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233959791] [2024-06-28 00:24:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:17,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:21,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:21,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233959791] [2024-06-28 00:24:21,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233959791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:21,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:21,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:21,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948171265] [2024-06-28 00:24:21,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:21,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:21,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:21,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:21,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:21,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:24:21,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 159 transitions, 1816 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:21,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:21,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:24:21,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:22,899 INFO L124 PetriNetUnfolderBase]: 2004/3226 cut-off events. [2024-06-28 00:24:22,900 INFO L125 PetriNetUnfolderBase]: For 43689/43703 co-relation queries the response was YES. [2024-06-28 00:24:22,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17369 conditions, 3226 events. 2004/3226 cut-off events. For 43689/43703 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18109 event pairs, 527 based on Foata normal form. 26/3251 useless extension candidates. Maximal degree in co-relation 17302. Up to 2805 conditions per place. [2024-06-28 00:24:22,923 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 172 selfloop transitions, 24 changer transitions 0/201 dead transitions. [2024-06-28 00:24:22,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 201 transitions, 2373 flow [2024-06-28 00:24:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:22,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 00:24:22,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 00:24:22,925 INFO L175 Difference]: Start difference. First operand has 137 places, 159 transitions, 1816 flow. Second operand 9 states and 157 transitions. [2024-06-28 00:24:22,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 201 transitions, 2373 flow [2024-06-28 00:24:22,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 201 transitions, 2316 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 00:24:22,985 INFO L231 Difference]: Finished difference. Result has 140 places, 162 transitions, 1866 flow [2024-06-28 00:24:22,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1866, PETRI_PLACES=140, PETRI_TRANSITIONS=162} [2024-06-28 00:24:22,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-28 00:24:22,986 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 162 transitions, 1866 flow [2024-06-28 00:24:22,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:22,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:22,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:22,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:24:22,986 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:22,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:22,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1735413735, now seen corresponding path program 4 times [2024-06-28 00:24:22,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:22,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031983788] [2024-06-28 00:24:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:22,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:26,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:26,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031983788] [2024-06-28 00:24:26,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031983788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:26,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:26,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:26,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286511880] [2024-06-28 00:24:26,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:26,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:26,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:26,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:26,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:26,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:24:26,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 162 transitions, 1866 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:26,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:26,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:24:26,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:28,044 INFO L124 PetriNetUnfolderBase]: 2072/3338 cut-off events. [2024-06-28 00:24:28,044 INFO L125 PetriNetUnfolderBase]: For 48390/48400 co-relation queries the response was YES. [2024-06-28 00:24:28,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17934 conditions, 3338 events. 2072/3338 cut-off events. For 48390/48400 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18846 event pairs, 568 based on Foata normal form. 20/3357 useless extension candidates. Maximal degree in co-relation 17865. Up to 2888 conditions per place. [2024-06-28 00:24:28,069 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 146 selfloop transitions, 46 changer transitions 0/197 dead transitions. [2024-06-28 00:24:28,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 197 transitions, 2364 flow [2024-06-28 00:24:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 00:24:28,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 00:24:28,070 INFO L175 Difference]: Start difference. First operand has 140 places, 162 transitions, 1866 flow. Second operand 9 states and 156 transitions. [2024-06-28 00:24:28,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 197 transitions, 2364 flow [2024-06-28 00:24:28,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 197 transitions, 2335 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:24:28,138 INFO L231 Difference]: Finished difference. Result has 144 places, 163 transitions, 1948 flow [2024-06-28 00:24:28,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1948, PETRI_PLACES=144, PETRI_TRANSITIONS=163} [2024-06-28 00:24:28,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-28 00:24:28,139 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 163 transitions, 1948 flow [2024-06-28 00:24:28,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:28,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:28,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:28,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:24:28,139 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:28,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:28,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1740920265, now seen corresponding path program 5 times [2024-06-28 00:24:28,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:28,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135597427] [2024-06-28 00:24:28,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:28,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:31,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:31,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135597427] [2024-06-28 00:24:31,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135597427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:31,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:31,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:31,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279735701] [2024-06-28 00:24:31,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:31,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:31,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:31,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:31,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:31,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:24:31,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 163 transitions, 1948 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:31,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:31,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:24:31,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:33,197 INFO L124 PetriNetUnfolderBase]: 2140/3466 cut-off events. [2024-06-28 00:24:33,197 INFO L125 PetriNetUnfolderBase]: For 52065/52075 co-relation queries the response was YES. [2024-06-28 00:24:33,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18747 conditions, 3466 events. 2140/3466 cut-off events. For 52065/52075 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19921 event pairs, 586 based on Foata normal form. 20/3485 useless extension candidates. Maximal degree in co-relation 18676. Up to 3004 conditions per place. [2024-06-28 00:24:33,219 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 44 changer transitions 0/198 dead transitions. [2024-06-28 00:24:33,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 198 transitions, 2450 flow [2024-06-28 00:24:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 00:24:33,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 00:24:33,221 INFO L175 Difference]: Start difference. First operand has 144 places, 163 transitions, 1948 flow. Second operand 9 states and 156 transitions. [2024-06-28 00:24:33,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 198 transitions, 2450 flow [2024-06-28 00:24:33,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 198 transitions, 2351 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 00:24:33,304 INFO L231 Difference]: Finished difference. Result has 146 places, 164 transitions, 1958 flow [2024-06-28 00:24:33,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1958, PETRI_PLACES=146, PETRI_TRANSITIONS=164} [2024-06-28 00:24:33,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-28 00:24:33,304 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 164 transitions, 1958 flow [2024-06-28 00:24:33,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:33,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:33,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:33,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:24:33,305 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:33,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:33,305 INFO L85 PathProgramCache]: Analyzing trace with hash 117161531, now seen corresponding path program 6 times [2024-06-28 00:24:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:33,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110136116] [2024-06-28 00:24:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:33,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:36,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:36,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110136116] [2024-06-28 00:24:36,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110136116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:36,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:36,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:36,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790671174] [2024-06-28 00:24:36,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:36,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:36,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:36,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:36,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:36,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:24:36,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 164 transitions, 1958 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:36,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:36,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:24:36,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:38,361 INFO L124 PetriNetUnfolderBase]: 2188/3562 cut-off events. [2024-06-28 00:24:38,361 INFO L125 PetriNetUnfolderBase]: For 54514/54524 co-relation queries the response was YES. [2024-06-28 00:24:38,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19176 conditions, 3562 events. 2188/3562 cut-off events. For 54514/54524 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20689 event pairs, 584 based on Foata normal form. 16/3577 useless extension candidates. Maximal degree in co-relation 19105. Up to 2870 conditions per place. [2024-06-28 00:24:38,390 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 152 selfloop transitions, 47 changer transitions 0/204 dead transitions. [2024-06-28 00:24:38,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 204 transitions, 2508 flow [2024-06-28 00:24:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 00:24:38,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 00:24:38,392 INFO L175 Difference]: Start difference. First operand has 146 places, 164 transitions, 1958 flow. Second operand 9 states and 158 transitions. [2024-06-28 00:24:38,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 204 transitions, 2508 flow [2024-06-28 00:24:38,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 204 transitions, 2387 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 00:24:38,478 INFO L231 Difference]: Finished difference. Result has 148 places, 167 transitions, 1986 flow [2024-06-28 00:24:38,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1986, PETRI_PLACES=148, PETRI_TRANSITIONS=167} [2024-06-28 00:24:38,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-28 00:24:38,479 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 167 transitions, 1986 flow [2024-06-28 00:24:38,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:38,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:38,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:38,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:24:38,479 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:38,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash 122886983, now seen corresponding path program 1 times [2024-06-28 00:24:38,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:38,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323357906] [2024-06-28 00:24:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:38,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:41,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:41,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323357906] [2024-06-28 00:24:41,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323357906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:41,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:41,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:41,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873271965] [2024-06-28 00:24:41,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:41,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:41,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:41,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:41,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:42,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:24:42,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 167 transitions, 1986 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:42,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:42,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:24:42,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:43,590 INFO L124 PetriNetUnfolderBase]: 2332/3818 cut-off events. [2024-06-28 00:24:43,590 INFO L125 PetriNetUnfolderBase]: For 63613/63623 co-relation queries the response was YES. [2024-06-28 00:24:43,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20732 conditions, 3818 events. 2332/3818 cut-off events. For 63613/63623 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22685 event pairs, 557 based on Foata normal form. 16/3833 useless extension candidates. Maximal degree in co-relation 20660. Up to 2826 conditions per place. [2024-06-28 00:24:43,622 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 152 selfloop transitions, 51 changer transitions 0/208 dead transitions. [2024-06-28 00:24:43,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 208 transitions, 2644 flow [2024-06-28 00:24:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 00:24:43,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 00:24:43,624 INFO L175 Difference]: Start difference. First operand has 148 places, 167 transitions, 1986 flow. Second operand 9 states and 161 transitions. [2024-06-28 00:24:43,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 208 transitions, 2644 flow [2024-06-28 00:24:43,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 208 transitions, 2573 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 00:24:43,729 INFO L231 Difference]: Finished difference. Result has 152 places, 169 transitions, 2057 flow [2024-06-28 00:24:43,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2057, PETRI_PLACES=152, PETRI_TRANSITIONS=169} [2024-06-28 00:24:43,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-28 00:24:43,729 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 169 transitions, 2057 flow [2024-06-28 00:24:43,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:43,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:43,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:43,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:24:43,730 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:43,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:43,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1704457017, now seen corresponding path program 2 times [2024-06-28 00:24:43,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:43,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583649084] [2024-06-28 00:24:43,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:43,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:48,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:48,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583649084] [2024-06-28 00:24:48,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583649084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:48,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:48,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:48,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660935802] [2024-06-28 00:24:48,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:48,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:48,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:48,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:48,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:48,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:24:48,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 169 transitions, 2057 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:48,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:48,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:24:48,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:50,174 INFO L124 PetriNetUnfolderBase]: 2352/3852 cut-off events. [2024-06-28 00:24:50,174 INFO L125 PetriNetUnfolderBase]: For 66614/66624 co-relation queries the response was YES. [2024-06-28 00:24:50,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21121 conditions, 3852 events. 2352/3852 cut-off events. For 66614/66624 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22957 event pairs, 591 based on Foata normal form. 16/3867 useless extension candidates. Maximal degree in co-relation 21047. Up to 2754 conditions per place. [2024-06-28 00:24:50,205 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 157 selfloop transitions, 53 changer transitions 0/215 dead transitions. [2024-06-28 00:24:50,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 215 transitions, 2733 flow [2024-06-28 00:24:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:24:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:24:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 00:24:50,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 00:24:50,207 INFO L175 Difference]: Start difference. First operand has 152 places, 169 transitions, 2057 flow. Second operand 10 states and 177 transitions. [2024-06-28 00:24:50,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 215 transitions, 2733 flow [2024-06-28 00:24:50,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 215 transitions, 2666 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 00:24:50,306 INFO L231 Difference]: Finished difference. Result has 157 places, 170 transitions, 2122 flow [2024-06-28 00:24:50,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2122, PETRI_PLACES=157, PETRI_TRANSITIONS=170} [2024-06-28 00:24:50,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-28 00:24:50,307 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 170 transitions, 2122 flow [2024-06-28 00:24:50,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:50,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:50,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:50,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:24:50,308 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:50,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1295055317, now seen corresponding path program 7 times [2024-06-28 00:24:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:50,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444514138] [2024-06-28 00:24:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:50,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:53,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:53,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444514138] [2024-06-28 00:24:53,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444514138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:53,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:53,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:53,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858899150] [2024-06-28 00:24:53,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:53,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:53,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:53,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:53,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:53,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:24:53,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 170 transitions, 2122 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:53,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:53,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:24:53,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:54,558 INFO L124 PetriNetUnfolderBase]: 2488/4108 cut-off events. [2024-06-28 00:24:54,559 INFO L125 PetriNetUnfolderBase]: For 75667/75677 co-relation queries the response was YES. [2024-06-28 00:24:54,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22724 conditions, 4108 events. 2488/4108 cut-off events. For 75667/75677 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25072 event pairs, 579 based on Foata normal form. 16/4123 useless extension candidates. Maximal degree in co-relation 22648. Up to 2963 conditions per place. [2024-06-28 00:24:54,591 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 167 selfloop transitions, 48 changer transitions 0/220 dead transitions. [2024-06-28 00:24:54,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 220 transitions, 2898 flow [2024-06-28 00:24:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:24:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:24:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 00:24:54,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 00:24:54,593 INFO L175 Difference]: Start difference. First operand has 157 places, 170 transitions, 2122 flow. Second operand 9 states and 164 transitions. [2024-06-28 00:24:54,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 220 transitions, 2898 flow [2024-06-28 00:24:54,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 220 transitions, 2778 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 00:24:54,722 INFO L231 Difference]: Finished difference. Result has 160 places, 177 transitions, 2241 flow [2024-06-28 00:24:54,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2241, PETRI_PLACES=160, PETRI_TRANSITIONS=177} [2024-06-28 00:24:54,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-28 00:24:54,723 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 177 transitions, 2241 flow [2024-06-28 00:24:54,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:54,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:54,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:54,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:24:54,723 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:54,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash -338885151, now seen corresponding path program 8 times [2024-06-28 00:24:54,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:54,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863124103] [2024-06-28 00:24:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:54,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:24:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:24:57,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:24:57,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863124103] [2024-06-28 00:24:57,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863124103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:24:57,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:24:57,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:24:57,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124074596] [2024-06-28 00:24:57,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:24:57,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:24:57,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:24:57,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:24:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:24:57,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:24:57,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 177 transitions, 2241 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:57,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:24:57,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:24:57,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:24:59,027 INFO L124 PetriNetUnfolderBase]: 2468/4082 cut-off events. [2024-06-28 00:24:59,027 INFO L125 PetriNetUnfolderBase]: For 76154/76164 co-relation queries the response was YES. [2024-06-28 00:24:59,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22624 conditions, 4082 events. 2468/4082 cut-off events. For 76154/76164 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 24895 event pairs, 595 based on Foata normal form. 16/4097 useless extension candidates. Maximal degree in co-relation 22545. Up to 3241 conditions per place. [2024-06-28 00:24:59,062 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 167 selfloop transitions, 42 changer transitions 0/214 dead transitions. [2024-06-28 00:24:59,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 214 transitions, 2936 flow [2024-06-28 00:24:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:24:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:24:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 00:24:59,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 00:24:59,064 INFO L175 Difference]: Start difference. First operand has 160 places, 177 transitions, 2241 flow. Second operand 8 states and 145 transitions. [2024-06-28 00:24:59,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 214 transitions, 2936 flow [2024-06-28 00:24:59,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 214 transitions, 2844 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 00:24:59,214 INFO L231 Difference]: Finished difference. Result has 164 places, 180 transitions, 2326 flow [2024-06-28 00:24:59,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2326, PETRI_PLACES=164, PETRI_TRANSITIONS=180} [2024-06-28 00:24:59,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-28 00:24:59,215 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 180 transitions, 2326 flow [2024-06-28 00:24:59,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:24:59,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:24:59,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:24:59,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:24:59,215 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:24:59,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:24:59,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1383768947, now seen corresponding path program 9 times [2024-06-28 00:24:59,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:24:59,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293932642] [2024-06-28 00:24:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:24:59,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:24:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:02,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:02,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293932642] [2024-06-28 00:25:02,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293932642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:02,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:02,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:25:02,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612370976] [2024-06-28 00:25:02,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:02,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:25:02,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:02,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:25:02,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:25:02,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:25:02,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 180 transitions, 2326 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:02,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:02,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:25:02,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:03,927 INFO L124 PetriNetUnfolderBase]: 2440/4032 cut-off events. [2024-06-28 00:25:03,927 INFO L125 PetriNetUnfolderBase]: For 72074/72084 co-relation queries the response was YES. [2024-06-28 00:25:03,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22164 conditions, 4032 events. 2440/4032 cut-off events. For 72074/72084 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24568 event pairs, 619 based on Foata normal form. 20/4051 useless extension candidates. Maximal degree in co-relation 22083. Up to 3445 conditions per place. [2024-06-28 00:25:03,960 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 165 selfloop transitions, 39 changer transitions 0/209 dead transitions. [2024-06-28 00:25:03,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 209 transitions, 2826 flow [2024-06-28 00:25:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:25:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:25:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 00:25:03,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 00:25:03,962 INFO L175 Difference]: Start difference. First operand has 164 places, 180 transitions, 2326 flow. Second operand 8 states and 142 transitions. [2024-06-28 00:25:03,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 209 transitions, 2826 flow [2024-06-28 00:25:04,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 209 transitions, 2740 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 00:25:04,112 INFO L231 Difference]: Finished difference. Result has 167 places, 180 transitions, 2332 flow [2024-06-28 00:25:04,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2332, PETRI_PLACES=167, PETRI_TRANSITIONS=180} [2024-06-28 00:25:04,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-28 00:25:04,112 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 180 transitions, 2332 flow [2024-06-28 00:25:04,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:04,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:04,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:04,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:25:04,113 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:04,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:04,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1510353037, now seen corresponding path program 10 times [2024-06-28 00:25:04,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:04,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107176995] [2024-06-28 00:25:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:04,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:06,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:06,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107176995] [2024-06-28 00:25:06,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107176995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:06,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:06,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:25:06,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639677217] [2024-06-28 00:25:06,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:06,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:25:06,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:25:06,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:25:06,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 00:25:06,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 180 transitions, 2332 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:06,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:06,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 00:25:06,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:07,785 INFO L124 PetriNetUnfolderBase]: 1900/3433 cut-off events. [2024-06-28 00:25:07,785 INFO L125 PetriNetUnfolderBase]: For 56816/56913 co-relation queries the response was YES. [2024-06-28 00:25:07,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18715 conditions, 3433 events. 1900/3433 cut-off events. For 56816/56913 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22684 event pairs, 217 based on Foata normal form. 67/3418 useless extension candidates. Maximal degree in co-relation 18633. Up to 2080 conditions per place. [2024-06-28 00:25:07,818 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 51 changer transitions 0/205 dead transitions. [2024-06-28 00:25:07,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 205 transitions, 2727 flow [2024-06-28 00:25:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:25:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:25:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-28 00:25:07,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-28 00:25:07,820 INFO L175 Difference]: Start difference. First operand has 167 places, 180 transitions, 2332 flow. Second operand 7 states and 135 transitions. [2024-06-28 00:25:07,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 205 transitions, 2727 flow [2024-06-28 00:25:07,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 205 transitions, 2636 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 00:25:07,923 INFO L231 Difference]: Finished difference. Result has 168 places, 183 transitions, 2420 flow [2024-06-28 00:25:07,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2420, PETRI_PLACES=168, PETRI_TRANSITIONS=183} [2024-06-28 00:25:07,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-28 00:25:07,924 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 183 transitions, 2420 flow [2024-06-28 00:25:07,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:07,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:07,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:07,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:25:07,924 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:07,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash -986712911, now seen corresponding path program 1 times [2024-06-28 00:25:07,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:07,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946055328] [2024-06-28 00:25:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:07,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:11,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:11,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946055328] [2024-06-28 00:25:11,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946055328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:11,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:11,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:25:11,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312690267] [2024-06-28 00:25:11,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:11,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:25:11,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:11,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:25:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:25:11,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:25:11,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 183 transitions, 2420 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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) [2024-06-28 00:25:11,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:11,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:25:11,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:13,042 INFO L124 PetriNetUnfolderBase]: 2286/3846 cut-off events. [2024-06-28 00:25:13,042 INFO L125 PetriNetUnfolderBase]: For 65583/65619 co-relation queries the response was YES. [2024-06-28 00:25:13,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21399 conditions, 3846 events. 2286/3846 cut-off events. For 65583/65619 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23795 event pairs, 631 based on Foata normal form. 5/3826 useless extension candidates. Maximal degree in co-relation 21314. Up to 3476 conditions per place. [2024-06-28 00:25:13,074 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 46 changer transitions 0/223 dead transitions. [2024-06-28 00:25:13,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 223 transitions, 3044 flow [2024-06-28 00:25:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:25:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:25:13,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-28 00:25:13,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 00:25:13,076 INFO L175 Difference]: Start difference. First operand has 168 places, 183 transitions, 2420 flow. Second operand 10 states and 168 transitions. [2024-06-28 00:25:13,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 223 transitions, 3044 flow [2024-06-28 00:25:13,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 223 transitions, 2944 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 00:25:13,211 INFO L231 Difference]: Finished difference. Result has 174 places, 199 transitions, 2600 flow [2024-06-28 00:25:13,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2600, PETRI_PLACES=174, PETRI_TRANSITIONS=199} [2024-06-28 00:25:13,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-28 00:25:13,211 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 199 transitions, 2600 flow [2024-06-28 00:25:13,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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) [2024-06-28 00:25:13,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:13,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:13,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:25:13,211 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:13,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1611125809, now seen corresponding path program 1 times [2024-06-28 00:25:13,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:13,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355803155] [2024-06-28 00:25:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:13,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:16,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:16,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355803155] [2024-06-28 00:25:16,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355803155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:16,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:16,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:25:16,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664574723] [2024-06-28 00:25:16,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:16,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:25:16,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:16,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:25:16,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:25:16,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:25:16,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 199 transitions, 2600 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:16,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:16,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:25:16,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:17,638 INFO L124 PetriNetUnfolderBase]: 2428/4036 cut-off events. [2024-06-28 00:25:17,638 INFO L125 PetriNetUnfolderBase]: For 63241/63249 co-relation queries the response was YES. [2024-06-28 00:25:17,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22574 conditions, 4036 events. 2428/4036 cut-off events. For 63241/63249 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24797 event pairs, 850 based on Foata normal form. 10/4045 useless extension candidates. Maximal degree in co-relation 22489. Up to 3689 conditions per place. [2024-06-28 00:25:17,675 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 33 changer transitions 0/228 dead transitions. [2024-06-28 00:25:17,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 228 transitions, 3254 flow [2024-06-28 00:25:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:25:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:25:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 00:25:17,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 00:25:17,677 INFO L175 Difference]: Start difference. First operand has 174 places, 199 transitions, 2600 flow. Second operand 7 states and 125 transitions. [2024-06-28 00:25:17,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 228 transitions, 3254 flow [2024-06-28 00:25:17,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 228 transitions, 3156 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 00:25:17,810 INFO L231 Difference]: Finished difference. Result has 177 places, 205 transitions, 2654 flow [2024-06-28 00:25:17,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2654, PETRI_PLACES=177, PETRI_TRANSITIONS=205} [2024-06-28 00:25:17,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-28 00:25:17,811 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 205 transitions, 2654 flow [2024-06-28 00:25:17,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:17,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:17,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:17,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:25:17,811 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:17,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1611245779, now seen corresponding path program 2 times [2024-06-28 00:25:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:17,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991744564] [2024-06-28 00:25:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:17,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:20,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:20,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991744564] [2024-06-28 00:25:20,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991744564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:20,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:20,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:25:20,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003439458] [2024-06-28 00:25:20,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:20,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:25:20,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:20,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:25:20,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:25:20,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:25:20,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 205 transitions, 2654 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:20,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:20,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:25:20,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:22,463 INFO L124 PetriNetUnfolderBase]: 2453/4075 cut-off events. [2024-06-28 00:25:22,464 INFO L125 PetriNetUnfolderBase]: For 64948/64956 co-relation queries the response was YES. [2024-06-28 00:25:22,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23066 conditions, 4075 events. 2453/4075 cut-off events. For 64948/64956 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25071 event pairs, 850 based on Foata normal form. 10/4084 useless extension candidates. Maximal degree in co-relation 22980. Up to 3771 conditions per place. [2024-06-28 00:25:22,502 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 195 selfloop transitions, 31 changer transitions 0/231 dead transitions. [2024-06-28 00:25:22,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 231 transitions, 3283 flow [2024-06-28 00:25:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:25:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:25:22,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 00:25:22,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 00:25:22,504 INFO L175 Difference]: Start difference. First operand has 177 places, 205 transitions, 2654 flow. Second operand 8 states and 127 transitions. [2024-06-28 00:25:22,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 231 transitions, 3283 flow [2024-06-28 00:25:22,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 231 transitions, 3239 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 00:25:22,640 INFO L231 Difference]: Finished difference. Result has 182 places, 213 transitions, 2792 flow [2024-06-28 00:25:22,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2792, PETRI_PLACES=182, PETRI_TRANSITIONS=213} [2024-06-28 00:25:22,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-28 00:25:22,640 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 213 transitions, 2792 flow [2024-06-28 00:25:22,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:22,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:22,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:22,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:25:22,641 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:22,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:22,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1789216847, now seen corresponding path program 3 times [2024-06-28 00:25:22,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:22,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418642854] [2024-06-28 00:25:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:22,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:25,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:25,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418642854] [2024-06-28 00:25:25,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418642854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:25,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:25,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:25:25,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483792065] [2024-06-28 00:25:25,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:25:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:25,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:25:25,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:25:25,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:25:25,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 213 transitions, 2792 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:25,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:25,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:25:25,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:27,246 INFO L124 PetriNetUnfolderBase]: 2447/4070 cut-off events. [2024-06-28 00:25:27,246 INFO L125 PetriNetUnfolderBase]: For 68282/68317 co-relation queries the response was YES. [2024-06-28 00:25:27,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23161 conditions, 4070 events. 2447/4070 cut-off events. For 68282/68317 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25094 event pairs, 863 based on Foata normal form. 29/4098 useless extension candidates. Maximal degree in co-relation 23073. Up to 3753 conditions per place. [2024-06-28 00:25:27,285 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 34 changer transitions 0/229 dead transitions. [2024-06-28 00:25:27,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 229 transitions, 3316 flow [2024-06-28 00:25:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:25:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:25:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-28 00:25:27,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-28 00:25:27,287 INFO L175 Difference]: Start difference. First operand has 182 places, 213 transitions, 2792 flow. Second operand 9 states and 136 transitions. [2024-06-28 00:25:27,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 229 transitions, 3316 flow [2024-06-28 00:25:27,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 229 transitions, 3225 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 00:25:27,413 INFO L231 Difference]: Finished difference. Result has 186 places, 213 transitions, 2776 flow [2024-06-28 00:25:27,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2776, PETRI_PLACES=186, PETRI_TRANSITIONS=213} [2024-06-28 00:25:27,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-28 00:25:27,413 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 213 transitions, 2776 flow [2024-06-28 00:25:27,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:27,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:27,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:27,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:25:27,414 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:27,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:27,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1117911762, now seen corresponding path program 1 times [2024-06-28 00:25:27,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:27,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135612576] [2024-06-28 00:25:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:27,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:30,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:30,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135612576] [2024-06-28 00:25:30,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135612576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:30,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:30,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:25:30,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979722548] [2024-06-28 00:25:30,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:30,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:25:30,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:30,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:25:30,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:25:30,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:25:30,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 213 transitions, 2776 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:30,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:30,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:25:30,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:32,603 INFO L124 PetriNetUnfolderBase]: 2460/4079 cut-off events. [2024-06-28 00:25:32,604 INFO L125 PetriNetUnfolderBase]: For 69113/69113 co-relation queries the response was YES. [2024-06-28 00:25:32,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23349 conditions, 4079 events. 2460/4079 cut-off events. For 69113/69113 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24962 event pairs, 830 based on Foata normal form. 1/4079 useless extension candidates. Maximal degree in co-relation 23260. Up to 3791 conditions per place. [2024-06-28 00:25:32,640 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 225 selfloop transitions, 35 changer transitions 0/265 dead transitions. [2024-06-28 00:25:32,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 265 transitions, 3832 flow [2024-06-28 00:25:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:25:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:25:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 00:25:32,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 00:25:32,641 INFO L175 Difference]: Start difference. First operand has 186 places, 213 transitions, 2776 flow. Second operand 8 states and 140 transitions. [2024-06-28 00:25:32,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 265 transitions, 3832 flow [2024-06-28 00:25:32,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 265 transitions, 3679 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-28 00:25:32,771 INFO L231 Difference]: Finished difference. Result has 189 places, 235 transitions, 3060 flow [2024-06-28 00:25:32,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2663, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3060, PETRI_PLACES=189, PETRI_TRANSITIONS=235} [2024-06-28 00:25:32,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-28 00:25:32,772 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 235 transitions, 3060 flow [2024-06-28 00:25:32,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:32,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:32,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:32,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:25:32,772 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:32,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:32,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1590981386, now seen corresponding path program 2 times [2024-06-28 00:25:32,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:32,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902689139] [2024-06-28 00:25:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:32,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:36,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:36,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902689139] [2024-06-28 00:25:36,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902689139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:36,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:36,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:25:36,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896774651] [2024-06-28 00:25:36,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:36,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:25:36,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:36,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:25:36,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:25:36,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:25:36,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 235 transitions, 3060 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:36,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:36,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:25:36,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:38,208 INFO L124 PetriNetUnfolderBase]: 2491/4124 cut-off events. [2024-06-28 00:25:38,209 INFO L125 PetriNetUnfolderBase]: For 74485/74485 co-relation queries the response was YES. [2024-06-28 00:25:38,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24288 conditions, 4124 events. 2491/4124 cut-off events. For 74485/74485 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25253 event pairs, 831 based on Foata normal form. 1/4124 useless extension candidates. Maximal degree in co-relation 24195. Up to 3853 conditions per place. [2024-06-28 00:25:38,248 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 39 changer transitions 0/277 dead transitions. [2024-06-28 00:25:38,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 277 transitions, 4058 flow [2024-06-28 00:25:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:25:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:25:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-28 00:25:38,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2024-06-28 00:25:38,250 INFO L175 Difference]: Start difference. First operand has 189 places, 235 transitions, 3060 flow. Second operand 11 states and 166 transitions. [2024-06-28 00:25:38,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 277 transitions, 4058 flow [2024-06-28 00:25:38,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 277 transitions, 3990 flow, removed 34 selfloop flow, removed 0 redundant places. [2024-06-28 00:25:38,392 INFO L231 Difference]: Finished difference. Result has 205 places, 254 transitions, 3388 flow [2024-06-28 00:25:38,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3388, PETRI_PLACES=205, PETRI_TRANSITIONS=254} [2024-06-28 00:25:38,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-28 00:25:38,392 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 254 transitions, 3388 flow [2024-06-28 00:25:38,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:38,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:38,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:38,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:25:38,393 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:38,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:38,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1176309518, now seen corresponding path program 3 times [2024-06-28 00:25:38,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:38,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208381121] [2024-06-28 00:25:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:38,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:42,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:42,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208381121] [2024-06-28 00:25:42,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208381121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:42,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:42,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:25:42,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558206674] [2024-06-28 00:25:42,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:42,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:25:42,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:42,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:25:42,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:25:42,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:25:42,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 254 transitions, 3388 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:42,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:42,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:25:42,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:43,674 INFO L124 PetriNetUnfolderBase]: 2488/4112 cut-off events. [2024-06-28 00:25:43,675 INFO L125 PetriNetUnfolderBase]: For 78474/78474 co-relation queries the response was YES. [2024-06-28 00:25:43,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24787 conditions, 4112 events. 2488/4112 cut-off events. For 78474/78474 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25103 event pairs, 841 based on Foata normal form. 1/4112 useless extension candidates. Maximal degree in co-relation 24685. Up to 3851 conditions per place. [2024-06-28 00:25:43,713 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 36 changer transitions 0/274 dead transitions. [2024-06-28 00:25:43,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 274 transitions, 4068 flow [2024-06-28 00:25:43,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:25:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:25:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 00:25:43,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-28 00:25:43,715 INFO L175 Difference]: Start difference. First operand has 205 places, 254 transitions, 3388 flow. Second operand 9 states and 143 transitions. [2024-06-28 00:25:43,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 274 transitions, 4068 flow [2024-06-28 00:25:43,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 274 transitions, 3964 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 00:25:43,896 INFO L231 Difference]: Finished difference. Result has 210 places, 254 transitions, 3362 flow [2024-06-28 00:25:43,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3284, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3362, PETRI_PLACES=210, PETRI_TRANSITIONS=254} [2024-06-28 00:25:43,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-28 00:25:43,896 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 254 transitions, 3362 flow [2024-06-28 00:25:43,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:43,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:43,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:43,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:25:43,897 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:43,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:43,897 INFO L85 PathProgramCache]: Analyzing trace with hash 368859608, now seen corresponding path program 4 times [2024-06-28 00:25:43,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:43,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440813747] [2024-06-28 00:25:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:43,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:47,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:47,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440813747] [2024-06-28 00:25:47,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440813747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:47,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:47,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:25:47,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121232248] [2024-06-28 00:25:47,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:47,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:25:47,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:47,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:25:47,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:25:47,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:25:47,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 254 transitions, 3362 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:47,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:47,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:25:47,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:49,430 INFO L124 PetriNetUnfolderBase]: 2506/4146 cut-off events. [2024-06-28 00:25:49,430 INFO L125 PetriNetUnfolderBase]: For 83082/83092 co-relation queries the response was YES. [2024-06-28 00:25:49,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25158 conditions, 4146 events. 2506/4146 cut-off events. For 83082/83092 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25367 event pairs, 843 based on Foata normal form. 11/4156 useless extension candidates. Maximal degree in co-relation 25054. Up to 3847 conditions per place. [2024-06-28 00:25:49,472 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 232 selfloop transitions, 49 changer transitions 0/286 dead transitions. [2024-06-28 00:25:49,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 286 transitions, 4362 flow [2024-06-28 00:25:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:25:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:25:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 177 transitions. [2024-06-28 00:25:49,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-28 00:25:49,476 INFO L175 Difference]: Start difference. First operand has 210 places, 254 transitions, 3362 flow. Second operand 12 states and 177 transitions. [2024-06-28 00:25:49,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 286 transitions, 4362 flow [2024-06-28 00:25:49,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 286 transitions, 4284 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 00:25:49,659 INFO L231 Difference]: Finished difference. Result has 218 places, 265 transitions, 3582 flow [2024-06-28 00:25:49,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3582, PETRI_PLACES=218, PETRI_TRANSITIONS=265} [2024-06-28 00:25:49,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-28 00:25:49,659 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 265 transitions, 3582 flow [2024-06-28 00:25:49,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:49,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:49,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:49,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:25:49,660 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:49,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash -394877142, now seen corresponding path program 5 times [2024-06-28 00:25:49,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:49,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476966876] [2024-06-28 00:25:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:49,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:53,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:53,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476966876] [2024-06-28 00:25:53,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476966876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:53,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:53,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:25:53,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835965172] [2024-06-28 00:25:53,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:53,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:25:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:25:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:25:53,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:25:53,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 265 transitions, 3582 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:53,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:53,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:25:53,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:25:54,930 INFO L124 PetriNetUnfolderBase]: 2503/4140 cut-off events. [2024-06-28 00:25:54,930 INFO L125 PetriNetUnfolderBase]: For 87719/87729 co-relation queries the response was YES. [2024-06-28 00:25:54,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25642 conditions, 4140 events. 2503/4140 cut-off events. For 87719/87729 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25332 event pairs, 843 based on Foata normal form. 11/4150 useless extension candidates. Maximal degree in co-relation 25533. Up to 3845 conditions per place. [2024-06-28 00:25:54,969 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 232 selfloop transitions, 46 changer transitions 0/283 dead transitions. [2024-06-28 00:25:54,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 283 transitions, 4368 flow [2024-06-28 00:25:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:25:54,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:25:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-28 00:25:54,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-28 00:25:54,971 INFO L175 Difference]: Start difference. First operand has 218 places, 265 transitions, 3582 flow. Second operand 10 states and 152 transitions. [2024-06-28 00:25:54,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 283 transitions, 4368 flow [2024-06-28 00:25:55,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 283 transitions, 4197 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-28 00:25:55,159 INFO L231 Difference]: Finished difference. Result has 223 places, 265 transitions, 3509 flow [2024-06-28 00:25:55,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3411, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3509, PETRI_PLACES=223, PETRI_TRANSITIONS=265} [2024-06-28 00:25:55,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-28 00:25:55,160 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 265 transitions, 3509 flow [2024-06-28 00:25:55,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:55,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:25:55,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:25:55,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:25:55,160 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:25:55,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:25:55,160 INFO L85 PathProgramCache]: Analyzing trace with hash -479690042, now seen corresponding path program 6 times [2024-06-28 00:25:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:25:55,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159461772] [2024-06-28 00:25:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:25:55,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:25:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:25:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:25:58,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:25:58,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159461772] [2024-06-28 00:25:58,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159461772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:25:58,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:25:58,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:25:58,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302573345] [2024-06-28 00:25:58,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:25:58,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:25:58,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:25:58,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:25:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:25:58,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:25:58,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 265 transitions, 3509 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:25:58,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:25:58,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:25:58,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:00,874 INFO L124 PetriNetUnfolderBase]: 2500/4130 cut-off events. [2024-06-28 00:26:00,874 INFO L125 PetriNetUnfolderBase]: For 90796/90806 co-relation queries the response was YES. [2024-06-28 00:26:00,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25513 conditions, 4130 events. 2500/4130 cut-off events. For 90796/90806 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25212 event pairs, 843 based on Foata normal form. 11/4140 useless extension candidates. Maximal degree in co-relation 25404. Up to 3843 conditions per place. [2024-06-28 00:26:00,920 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 62 changer transitions 0/289 dead transitions. [2024-06-28 00:26:00,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 289 transitions, 4355 flow [2024-06-28 00:26:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:26:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:26:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 158 transitions. [2024-06-28 00:26:00,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.341991341991342 [2024-06-28 00:26:00,922 INFO L175 Difference]: Start difference. First operand has 223 places, 265 transitions, 3509 flow. Second operand 11 states and 158 transitions. [2024-06-28 00:26:00,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 289 transitions, 4355 flow [2024-06-28 00:26:01,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 289 transitions, 4247 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-28 00:26:01,138 INFO L231 Difference]: Finished difference. Result has 226 places, 274 transitions, 3721 flow [2024-06-28 00:26:01,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3721, PETRI_PLACES=226, PETRI_TRANSITIONS=274} [2024-06-28 00:26:01,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-28 00:26:01,139 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 274 transitions, 3721 flow [2024-06-28 00:26:01,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:01,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:01,139 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] [2024-06-28 00:26:01,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:26:01,139 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:01,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash -534747508, now seen corresponding path program 1 times [2024-06-28 00:26:01,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:01,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657044547] [2024-06-28 00:26:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:06,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:06,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657044547] [2024-06-28 00:26:06,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657044547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:06,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:06,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:06,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580428355] [2024-06-28 00:26:06,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:06,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:06,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:06,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:06,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:26:06,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 274 transitions, 3721 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:06,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:06,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:26:06,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:07,939 INFO L124 PetriNetUnfolderBase]: 2515/4163 cut-off events. [2024-06-28 00:26:07,939 INFO L125 PetriNetUnfolderBase]: For 96044/96052 co-relation queries the response was YES. [2024-06-28 00:26:07,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25913 conditions, 4163 events. 2515/4163 cut-off events. For 96044/96052 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25584 event pairs, 836 based on Foata normal form. 10/4172 useless extension candidates. Maximal degree in co-relation 25802. Up to 3850 conditions per place. [2024-06-28 00:26:07,988 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 47 changer transitions 0/306 dead transitions. [2024-06-28 00:26:07,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 306 transitions, 4577 flow [2024-06-28 00:26:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:26:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:26:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 00:26:07,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 00:26:07,990 INFO L175 Difference]: Start difference. First operand has 226 places, 274 transitions, 3721 flow. Second operand 9 states and 149 transitions. [2024-06-28 00:26:07,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 306 transitions, 4577 flow [2024-06-28 00:26:08,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 306 transitions, 4452 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-28 00:26:08,238 INFO L231 Difference]: Finished difference. Result has 229 places, 282 transitions, 3798 flow [2024-06-28 00:26:08,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3798, PETRI_PLACES=229, PETRI_TRANSITIONS=282} [2024-06-28 00:26:08,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-28 00:26:08,239 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 282 transitions, 3798 flow [2024-06-28 00:26:08,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:08,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:08,239 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] [2024-06-28 00:26:08,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:26:08,239 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:08,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2106023016, now seen corresponding path program 2 times [2024-06-28 00:26:08,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:08,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261245609] [2024-06-28 00:26:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:08,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:11,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:11,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261245609] [2024-06-28 00:26:11,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261245609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:11,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:11,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:11,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948145372] [2024-06-28 00:26:11,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:11,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:11,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:11,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:11,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:11,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:26:11,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 282 transitions, 3798 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:11,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:11,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:26:11,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:13,510 INFO L124 PetriNetUnfolderBase]: 2551/4212 cut-off events. [2024-06-28 00:26:13,510 INFO L125 PetriNetUnfolderBase]: For 98042/98042 co-relation queries the response was YES. [2024-06-28 00:26:13,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26063 conditions, 4212 events. 2551/4212 cut-off events. For 98042/98042 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 25774 event pairs, 818 based on Foata normal form. 2/4213 useless extension candidates. Maximal degree in co-relation 25952. Up to 3810 conditions per place. [2024-06-28 00:26:13,563 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 86 changer transitions 0/342 dead transitions. [2024-06-28 00:26:13,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 342 transitions, 5021 flow [2024-06-28 00:26:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:26:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:26:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-28 00:26:13,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 00:26:13,564 INFO L175 Difference]: Start difference. First operand has 229 places, 282 transitions, 3798 flow. Second operand 12 states and 200 transitions. [2024-06-28 00:26:13,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 342 transitions, 5021 flow [2024-06-28 00:26:13,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 342 transitions, 4907 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 00:26:13,791 INFO L231 Difference]: Finished difference. Result has 238 places, 304 transitions, 4176 flow [2024-06-28 00:26:13,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3689, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4176, PETRI_PLACES=238, PETRI_TRANSITIONS=304} [2024-06-28 00:26:13,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-28 00:26:13,791 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 304 transitions, 4176 flow [2024-06-28 00:26:13,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:13,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:13,792 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] [2024-06-28 00:26:13,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:26:13,792 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:13,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:13,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1874676172, now seen corresponding path program 3 times [2024-06-28 00:26:13,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:13,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822743576] [2024-06-28 00:26:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:13,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:18,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:18,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822743576] [2024-06-28 00:26:18,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822743576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:18,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:18,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:18,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040420372] [2024-06-28 00:26:18,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:18,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:18,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:18,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:18,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:18,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:26:18,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 304 transitions, 4176 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:18,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:18,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:26:18,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:20,363 INFO L124 PetriNetUnfolderBase]: 2548/4216 cut-off events. [2024-06-28 00:26:20,363 INFO L125 PetriNetUnfolderBase]: For 101960/101968 co-relation queries the response was YES. [2024-06-28 00:26:20,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26401 conditions, 4216 events. 2548/4216 cut-off events. For 101960/101968 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25913 event pairs, 826 based on Foata normal form. 9/4224 useless extension candidates. Maximal degree in co-relation 26288. Up to 3906 conditions per place. [2024-06-28 00:26:20,404 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 273 selfloop transitions, 47 changer transitions 0/325 dead transitions. [2024-06-28 00:26:20,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 325 transitions, 4977 flow [2024-06-28 00:26:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:26:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:26:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 00:26:20,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-28 00:26:20,408 INFO L175 Difference]: Start difference. First operand has 238 places, 304 transitions, 4176 flow. Second operand 9 states and 143 transitions. [2024-06-28 00:26:20,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 325 transitions, 4977 flow [2024-06-28 00:26:20,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 325 transitions, 4810 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-28 00:26:20,627 INFO L231 Difference]: Finished difference. Result has 240 places, 307 transitions, 4154 flow [2024-06-28 00:26:20,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4009, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4154, PETRI_PLACES=240, PETRI_TRANSITIONS=307} [2024-06-28 00:26:20,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-28 00:26:20,627 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 307 transitions, 4154 flow [2024-06-28 00:26:20,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:20,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:20,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:26:20,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:26:20,628 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:20,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:20,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1222359544, now seen corresponding path program 4 times [2024-06-28 00:26:20,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:20,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989518647] [2024-06-28 00:26:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:20,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:24,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:24,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989518647] [2024-06-28 00:26:24,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989518647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:24,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:24,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:24,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876374311] [2024-06-28 00:26:24,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:24,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:24,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:24,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:24,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:24,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:26:24,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 307 transitions, 4154 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:24,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:24,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:26:24,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:26,025 INFO L124 PetriNetUnfolderBase]: 2602/4282 cut-off events. [2024-06-28 00:26:26,025 INFO L125 PetriNetUnfolderBase]: For 110140/110146 co-relation queries the response was YES. [2024-06-28 00:26:26,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27161 conditions, 4282 events. 2602/4282 cut-off events. For 110140/110146 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26170 event pairs, 818 based on Foata normal form. 9/4290 useless extension candidates. Maximal degree in co-relation 27049. Up to 3862 conditions per place. [2024-06-28 00:26:26,071 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 125 changer transitions 0/369 dead transitions. [2024-06-28 00:26:26,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 369 transitions, 5626 flow [2024-06-28 00:26:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:26:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:26:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-28 00:26:26,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 00:26:26,073 INFO L175 Difference]: Start difference. First operand has 240 places, 307 transitions, 4154 flow. Second operand 12 states and 195 transitions. [2024-06-28 00:26:26,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 369 transitions, 5626 flow [2024-06-28 00:26:26,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 369 transitions, 5532 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 00:26:26,315 INFO L231 Difference]: Finished difference. Result has 250 places, 342 transitions, 4815 flow [2024-06-28 00:26:26,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4060, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4815, PETRI_PLACES=250, PETRI_TRANSITIONS=342} [2024-06-28 00:26:26,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-28 00:26:26,316 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 342 transitions, 4815 flow [2024-06-28 00:26:26,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:26,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:26,316 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] [2024-06-28 00:26:26,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:26:26,317 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:26,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:26,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2115475276, now seen corresponding path program 5 times [2024-06-28 00:26:26,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:26,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632169733] [2024-06-28 00:26:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:26,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:30,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:30,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632169733] [2024-06-28 00:26:30,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632169733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:30,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:30,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:30,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089916238] [2024-06-28 00:26:30,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:30,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:30,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:30,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:30,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:30,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:26:30,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 342 transitions, 4815 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:30,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:30,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:26:30,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:31,586 INFO L124 PetriNetUnfolderBase]: 2601/4285 cut-off events. [2024-06-28 00:26:31,586 INFO L125 PetriNetUnfolderBase]: For 118217/118223 co-relation queries the response was YES. [2024-06-28 00:26:31,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27697 conditions, 4285 events. 2601/4285 cut-off events. For 118217/118223 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26243 event pairs, 818 based on Foata normal form. 9/4293 useless extension candidates. Maximal degree in co-relation 27582. Up to 3863 conditions per place. [2024-06-28 00:26:31,633 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 122 changer transitions 0/374 dead transitions. [2024-06-28 00:26:31,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 374 transitions, 5945 flow [2024-06-28 00:26:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:26:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:26:31,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-28 00:26:31,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39087301587301587 [2024-06-28 00:26:31,635 INFO L175 Difference]: Start difference. First operand has 250 places, 342 transitions, 4815 flow. Second operand 12 states and 197 transitions. [2024-06-28 00:26:31,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 374 transitions, 5945 flow [2024-06-28 00:26:31,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 374 transitions, 5831 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-28 00:26:31,932 INFO L231 Difference]: Finished difference. Result has 261 places, 347 transitions, 5045 flow [2024-06-28 00:26:31,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4705, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5045, PETRI_PLACES=261, PETRI_TRANSITIONS=347} [2024-06-28 00:26:31,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-28 00:26:31,932 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 347 transitions, 5045 flow [2024-06-28 00:26:31,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:31,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:31,933 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] [2024-06-28 00:26:31,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:26:31,933 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:31,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:31,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1991209988, now seen corresponding path program 6 times [2024-06-28 00:26:31,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:31,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502746021] [2024-06-28 00:26:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:31,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:35,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:35,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502746021] [2024-06-28 00:26:35,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502746021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:35,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:35,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:35,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450919418] [2024-06-28 00:26:35,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:35,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:35,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:35,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:35,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:35,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:26:35,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 347 transitions, 5045 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:35,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:35,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:26:35,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:37,457 INFO L124 PetriNetUnfolderBase]: 2592/4273 cut-off events. [2024-06-28 00:26:37,457 INFO L125 PetriNetUnfolderBase]: For 124686/124692 co-relation queries the response was YES. [2024-06-28 00:26:37,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27868 conditions, 4273 events. 2592/4273 cut-off events. For 124686/124692 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26186 event pairs, 819 based on Foata normal form. 9/4281 useless extension candidates. Maximal degree in co-relation 27750. Up to 3855 conditions per place. [2024-06-28 00:26:37,506 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 247 selfloop transitions, 120 changer transitions 0/372 dead transitions. [2024-06-28 00:26:37,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 372 transitions, 5952 flow [2024-06-28 00:26:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:26:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:26:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-28 00:26:37,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-28 00:26:37,508 INFO L175 Difference]: Start difference. First operand has 261 places, 347 transitions, 5045 flow. Second operand 11 states and 175 transitions. [2024-06-28 00:26:37,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 372 transitions, 5952 flow [2024-06-28 00:26:37,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 372 transitions, 5712 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-28 00:26:37,801 INFO L231 Difference]: Finished difference. Result has 268 places, 347 transitions, 5065 flow [2024-06-28 00:26:37,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5065, PETRI_PLACES=268, PETRI_TRANSITIONS=347} [2024-06-28 00:26:37,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-28 00:26:37,802 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 347 transitions, 5065 flow [2024-06-28 00:26:37,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:37,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:37,803 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] [2024-06-28 00:26:37,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:26:37,803 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:37,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:37,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2115890986, now seen corresponding path program 7 times [2024-06-28 00:26:37,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:37,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305175095] [2024-06-28 00:26:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:37,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:42,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:42,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305175095] [2024-06-28 00:26:42,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305175095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:42,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:42,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:26:42,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284164250] [2024-06-28 00:26:42,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:42,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:26:42,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:42,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:26:42,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:26:42,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:26:42,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 347 transitions, 5065 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:42,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:42,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:26:42,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:44,065 INFO L124 PetriNetUnfolderBase]: 2581/4264 cut-off events. [2024-06-28 00:26:44,065 INFO L125 PetriNetUnfolderBase]: For 127359/127388 co-relation queries the response was YES. [2024-06-28 00:26:44,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27703 conditions, 4264 events. 2581/4264 cut-off events. For 127359/127388 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26213 event pairs, 840 based on Foata normal form. 25/4288 useless extension candidates. Maximal degree in co-relation 27584. Up to 3953 conditions per place. [2024-06-28 00:26:44,114 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 46 changer transitions 0/360 dead transitions. [2024-06-28 00:26:44,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 360 transitions, 5820 flow [2024-06-28 00:26:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:26:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:26:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-28 00:26:44,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-28 00:26:44,116 INFO L175 Difference]: Start difference. First operand has 268 places, 347 transitions, 5065 flow. Second operand 9 states and 135 transitions. [2024-06-28 00:26:44,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 360 transitions, 5820 flow [2024-06-28 00:26:44,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 360 transitions, 5579 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-28 00:26:44,384 INFO L231 Difference]: Finished difference. Result has 271 places, 347 transitions, 4934 flow [2024-06-28 00:26:44,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4934, PETRI_PLACES=271, PETRI_TRANSITIONS=347} [2024-06-28 00:26:44,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-28 00:26:44,385 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 347 transitions, 4934 flow [2024-06-28 00:26:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:44,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:44,386 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] [2024-06-28 00:26:44,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:26:44,386 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:44,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash 866072970, now seen corresponding path program 1 times [2024-06-28 00:26:44,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:44,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584394125] [2024-06-28 00:26:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:44,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:49,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:49,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584394125] [2024-06-28 00:26:49,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584394125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:49,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:49,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:26:49,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639515126] [2024-06-28 00:26:49,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:49,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:26:49,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:49,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:26:49,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:26:49,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:26:49,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 347 transitions, 4934 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:49,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:49,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:26:49,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:50,908 INFO L124 PetriNetUnfolderBase]: 2589/4264 cut-off events. [2024-06-28 00:26:50,909 INFO L125 PetriNetUnfolderBase]: For 129607/129607 co-relation queries the response was YES. [2024-06-28 00:26:50,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27627 conditions, 4264 events. 2589/4264 cut-off events. For 129607/129607 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26048 event pairs, 815 based on Foata normal form. 2/4265 useless extension candidates. Maximal degree in co-relation 27508. Up to 3996 conditions per place. [2024-06-28 00:26:50,967 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 332 selfloop transitions, 36 changer transitions 0/373 dead transitions. [2024-06-28 00:26:50,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 373 transitions, 5760 flow [2024-06-28 00:26:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:26:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:26:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-28 00:26:50,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36796536796536794 [2024-06-28 00:26:50,969 INFO L175 Difference]: Start difference. First operand has 271 places, 347 transitions, 4934 flow. Second operand 11 states and 170 transitions. [2024-06-28 00:26:50,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 373 transitions, 5760 flow [2024-06-28 00:26:51,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 373 transitions, 5650 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 00:26:51,326 INFO L231 Difference]: Finished difference. Result has 275 places, 349 transitions, 4940 flow [2024-06-28 00:26:51,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4824, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4940, PETRI_PLACES=275, PETRI_TRANSITIONS=349} [2024-06-28 00:26:51,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-28 00:26:51,327 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 349 transitions, 4940 flow [2024-06-28 00:26:51,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:26:51,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:51,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:26:51,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:26:51,327 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:51,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:51,327 INFO L85 PathProgramCache]: Analyzing trace with hash 880357770, now seen corresponding path program 2 times [2024-06-28 00:26:51,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:51,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768041039] [2024-06-28 00:26:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:51,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:26:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:26:56,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:26:56,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768041039] [2024-06-28 00:26:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768041039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:26:56,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:26:56,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:26:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371166389] [2024-06-28 00:26:56,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:26:56,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:26:56,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:26:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:26:56,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:26:56,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:26:56,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 349 transitions, 4940 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-28 00:26:56,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:26:56,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:26:56,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:26:57,885 INFO L124 PetriNetUnfolderBase]: 2617/4339 cut-off events. [2024-06-28 00:26:57,885 INFO L125 PetriNetUnfolderBase]: For 145757/145757 co-relation queries the response was YES. [2024-06-28 00:26:57,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28415 conditions, 4339 events. 2617/4339 cut-off events. For 145757/145757 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26744 event pairs, 615 based on Foata normal form. 8/4329 useless extension candidates. Maximal degree in co-relation 28295. Up to 3686 conditions per place. [2024-06-28 00:26:57,936 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 66 changer transitions 0/386 dead transitions. [2024-06-28 00:26:57,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 386 transitions, 5903 flow [2024-06-28 00:26:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:26:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:26:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-28 00:26:57,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-28 00:26:57,938 INFO L175 Difference]: Start difference. First operand has 275 places, 349 transitions, 4940 flow. Second operand 12 states and 194 transitions. [2024-06-28 00:26:57,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 386 transitions, 5903 flow [2024-06-28 00:26:58,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 386 transitions, 5781 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 00:26:58,270 INFO L231 Difference]: Finished difference. Result has 282 places, 355 transitions, 5082 flow [2024-06-28 00:26:58,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5082, PETRI_PLACES=282, PETRI_TRANSITIONS=355} [2024-06-28 00:26:58,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-28 00:26:58,271 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 355 transitions, 5082 flow [2024-06-28 00:26:58,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-28 00:26:58,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:26:58,271 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] [2024-06-28 00:26:58,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:26:58,271 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:26:58,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:26:58,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1987705068, now seen corresponding path program 1 times [2024-06-28 00:26:58,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:26:58,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424942752] [2024-06-28 00:26:58,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:26:58,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:26:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:01,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:01,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424942752] [2024-06-28 00:27:01,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424942752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:01,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:01,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:01,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106583840] [2024-06-28 00:27:01,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:01,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:01,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:01,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:01,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:01,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:27:01,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 355 transitions, 5082 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:01,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:01,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:27:01,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:03,514 INFO L124 PetriNetUnfolderBase]: 2721/4476 cut-off events. [2024-06-28 00:27:03,514 INFO L125 PetriNetUnfolderBase]: For 150231/150239 co-relation queries the response was YES. [2024-06-28 00:27:03,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29673 conditions, 4476 events. 2721/4476 cut-off events. For 150231/150239 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27511 event pairs, 801 based on Foata normal form. 12/4487 useless extension candidates. Maximal degree in co-relation 29551. Up to 3954 conditions per place. [2024-06-28 00:27:03,563 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 319 selfloop transitions, 67 changer transitions 0/391 dead transitions. [2024-06-28 00:27:03,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 391 transitions, 6159 flow [2024-06-28 00:27:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:27:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:27:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 00:27:03,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 00:27:03,565 INFO L175 Difference]: Start difference. First operand has 282 places, 355 transitions, 5082 flow. Second operand 9 states and 151 transitions. [2024-06-28 00:27:03,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 391 transitions, 6159 flow [2024-06-28 00:27:03,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 391 transitions, 6080 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 00:27:03,932 INFO L231 Difference]: Finished difference. Result has 284 places, 359 transitions, 5216 flow [2024-06-28 00:27:03,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5003, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5216, PETRI_PLACES=284, PETRI_TRANSITIONS=359} [2024-06-28 00:27:03,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-28 00:27:03,933 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 359 transitions, 5216 flow [2024-06-28 00:27:03,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:03,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:03,933 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] [2024-06-28 00:27:03,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:27:03,933 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:03,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:03,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1987765518, now seen corresponding path program 2 times [2024-06-28 00:27:03,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:03,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267700409] [2024-06-28 00:27:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:03,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:07,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:07,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267700409] [2024-06-28 00:27:07,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267700409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:07,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:07,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:07,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737395301] [2024-06-28 00:27:07,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:07,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:07,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:07,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:07,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:07,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:27:07,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 359 transitions, 5216 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:07,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:07,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:27:07,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:09,564 INFO L124 PetriNetUnfolderBase]: 2737/4501 cut-off events. [2024-06-28 00:27:09,565 INFO L125 PetriNetUnfolderBase]: For 155954/155962 co-relation queries the response was YES. [2024-06-28 00:27:09,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30171 conditions, 4501 events. 2737/4501 cut-off events. For 155954/155962 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27676 event pairs, 865 based on Foata normal form. 12/4512 useless extension candidates. Maximal degree in co-relation 30048. Up to 4116 conditions per place. [2024-06-28 00:27:09,607 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 319 selfloop transitions, 62 changer transitions 0/386 dead transitions. [2024-06-28 00:27:09,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 386 transitions, 6129 flow [2024-06-28 00:27:09,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:27:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:27:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 00:27:09,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-28 00:27:09,608 INFO L175 Difference]: Start difference. First operand has 284 places, 359 transitions, 5216 flow. Second operand 9 states and 145 transitions. [2024-06-28 00:27:09,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 386 transitions, 6129 flow [2024-06-28 00:27:09,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 386 transitions, 6037 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 00:27:09,943 INFO L231 Difference]: Finished difference. Result has 289 places, 361 transitions, 5296 flow [2024-06-28 00:27:09,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5296, PETRI_PLACES=289, PETRI_TRANSITIONS=361} [2024-06-28 00:27:09,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-28 00:27:09,944 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 361 transitions, 5296 flow [2024-06-28 00:27:09,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:09,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:09,944 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] [2024-06-28 00:27:09,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:27:09,945 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:09,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:09,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2103721904, now seen corresponding path program 1 times [2024-06-28 00:27:09,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:09,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282790163] [2024-06-28 00:27:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:09,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:14,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:14,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282790163] [2024-06-28 00:27:14,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282790163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:14,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:14,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:14,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847756865] [2024-06-28 00:27:14,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:14,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:14,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:14,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:14,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:27:14,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 361 transitions, 5296 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:14,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:14,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:27:14,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:16,470 INFO L124 PetriNetUnfolderBase]: 2734/4487 cut-off events. [2024-06-28 00:27:16,470 INFO L125 PetriNetUnfolderBase]: For 155800/155800 co-relation queries the response was YES. [2024-06-28 00:27:16,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30256 conditions, 4487 events. 2734/4487 cut-off events. For 155800/155800 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27453 event pairs, 857 based on Foata normal form. 1/4487 useless extension candidates. Maximal degree in co-relation 30131. Up to 4173 conditions per place. [2024-06-28 00:27:16,523 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 63 changer transitions 0/383 dead transitions. [2024-06-28 00:27:16,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 383 transitions, 6213 flow [2024-06-28 00:27:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 00:27:16,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-28 00:27:16,525 INFO L175 Difference]: Start difference. First operand has 289 places, 361 transitions, 5296 flow. Second operand 8 states and 139 transitions. [2024-06-28 00:27:16,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 383 transitions, 6213 flow [2024-06-28 00:27:16,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 383 transitions, 6017 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-28 00:27:16,973 INFO L231 Difference]: Finished difference. Result has 289 places, 362 transitions, 5249 flow [2024-06-28 00:27:16,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5108, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5249, PETRI_PLACES=289, PETRI_TRANSITIONS=362} [2024-06-28 00:27:16,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-28 00:27:16,974 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 362 transitions, 5249 flow [2024-06-28 00:27:16,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:16,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:16,974 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] [2024-06-28 00:27:16,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:27:16,974 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:16,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:16,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2075959182, now seen corresponding path program 3 times [2024-06-28 00:27:16,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:16,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32056332] [2024-06-28 00:27:16,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:16,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:20,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:20,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32056332] [2024-06-28 00:27:20,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32056332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:20,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:20,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:20,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702597635] [2024-06-28 00:27:20,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:20,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:20,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:20,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:20,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:27:20,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 362 transitions, 5249 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:20,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:20,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:27:20,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:22,471 INFO L124 PetriNetUnfolderBase]: 2750/4529 cut-off events. [2024-06-28 00:27:22,472 INFO L125 PetriNetUnfolderBase]: For 165540/165548 co-relation queries the response was YES. [2024-06-28 00:27:22,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30428 conditions, 4529 events. 2750/4529 cut-off events. For 165540/165548 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27909 event pairs, 864 based on Foata normal form. 12/4540 useless extension candidates. Maximal degree in co-relation 30302. Up to 4195 conditions per place. [2024-06-28 00:27:22,517 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 47 changer transitions 0/383 dead transitions. [2024-06-28 00:27:22,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 383 transitions, 6114 flow [2024-06-28 00:27:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:27:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:27:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 00:27:22,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-28 00:27:22,519 INFO L175 Difference]: Start difference. First operand has 289 places, 362 transitions, 5249 flow. Second operand 9 states and 140 transitions. [2024-06-28 00:27:22,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 383 transitions, 6114 flow [2024-06-28 00:27:22,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 383 transitions, 6004 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 00:27:22,891 INFO L231 Difference]: Finished difference. Result has 294 places, 364 transitions, 5279 flow [2024-06-28 00:27:22,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5279, PETRI_PLACES=294, PETRI_TRANSITIONS=364} [2024-06-28 00:27:22,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-28 00:27:22,891 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 364 transitions, 5279 flow [2024-06-28 00:27:22,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:22,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:22,892 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] [2024-06-28 00:27:22,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:27:22,892 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:22,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2075954222, now seen corresponding path program 2 times [2024-06-28 00:27:22,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:22,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450507197] [2024-06-28 00:27:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:22,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:27,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450507197] [2024-06-28 00:27:27,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450507197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:27,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:27,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:27,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994503020] [2024-06-28 00:27:27,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:27,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:27,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:27,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:27,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:27,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:27:27,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 364 transitions, 5279 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:27,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:27,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:27:27,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:29,137 INFO L124 PetriNetUnfolderBase]: 2755/4518 cut-off events. [2024-06-28 00:27:29,137 INFO L125 PetriNetUnfolderBase]: For 166281/166281 co-relation queries the response was YES. [2024-06-28 00:27:29,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30572 conditions, 4518 events. 2755/4518 cut-off events. For 166281/166281 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 27649 event pairs, 857 based on Foata normal form. 1/4518 useless extension candidates. Maximal degree in co-relation 30444. Up to 4247 conditions per place. [2024-06-28 00:27:29,190 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 47 changer transitions 0/384 dead transitions. [2024-06-28 00:27:29,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 384 transitions, 6220 flow [2024-06-28 00:27:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:27:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:27:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 00:27:29,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 00:27:29,192 INFO L175 Difference]: Start difference. First operand has 294 places, 364 transitions, 5279 flow. Second operand 9 states and 144 transitions. [2024-06-28 00:27:29,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 384 transitions, 6220 flow [2024-06-28 00:27:29,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 384 transitions, 6112 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 00:27:29,679 INFO L231 Difference]: Finished difference. Result has 296 places, 367 transitions, 5314 flow [2024-06-28 00:27:29,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5171, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5314, PETRI_PLACES=296, PETRI_TRANSITIONS=367} [2024-06-28 00:27:29,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-28 00:27:29,680 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 367 transitions, 5314 flow [2024-06-28 00:27:29,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:29,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:29,680 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] [2024-06-28 00:27:29,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:27:29,680 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:29,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:29,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2106031138, now seen corresponding path program 3 times [2024-06-28 00:27:29,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:29,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462599405] [2024-06-28 00:27:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:29,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:34,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:34,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462599405] [2024-06-28 00:27:34,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462599405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:34,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:34,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:34,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447455349] [2024-06-28 00:27:34,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:34,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:34,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:34,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:34,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:27:34,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 367 transitions, 5314 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:34,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:34,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:27:34,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:36,477 INFO L124 PetriNetUnfolderBase]: 2752/4516 cut-off events. [2024-06-28 00:27:36,477 INFO L125 PetriNetUnfolderBase]: For 169928/169928 co-relation queries the response was YES. [2024-06-28 00:27:36,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30541 conditions, 4516 events. 2752/4516 cut-off events. For 169928/169928 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 27645 event pairs, 857 based on Foata normal form. 1/4516 useless extension candidates. Maximal degree in co-relation 30412. Up to 4244 conditions per place. [2024-06-28 00:27:36,531 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 49 changer transitions 0/386 dead transitions. [2024-06-28 00:27:36,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 386 transitions, 6137 flow [2024-06-28 00:27:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:27:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:27:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 165 transitions. [2024-06-28 00:27:36,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-28 00:27:36,533 INFO L175 Difference]: Start difference. First operand has 296 places, 367 transitions, 5314 flow. Second operand 11 states and 165 transitions. [2024-06-28 00:27:36,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 386 transitions, 6137 flow [2024-06-28 00:27:37,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 386 transitions, 6035 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 00:27:37,034 INFO L231 Difference]: Finished difference. Result has 301 places, 368 transitions, 5338 flow [2024-06-28 00:27:37,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5338, PETRI_PLACES=301, PETRI_TRANSITIONS=368} [2024-06-28 00:27:37,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-28 00:27:37,035 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 368 transitions, 5338 flow [2024-06-28 00:27:37,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:37,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:37,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:37,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:27:37,036 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:37,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:37,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1450430512, now seen corresponding path program 4 times [2024-06-28 00:27:37,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:37,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350977384] [2024-06-28 00:27:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:37,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:40,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:40,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350977384] [2024-06-28 00:27:40,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350977384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:40,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:40,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:40,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242767515] [2024-06-28 00:27:40,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:40,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:40,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:40,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:40,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:27:40,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 368 transitions, 5338 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:40,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:40,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:27:40,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:42,587 INFO L124 PetriNetUnfolderBase]: 2742/4515 cut-off events. [2024-06-28 00:27:42,588 INFO L125 PetriNetUnfolderBase]: For 171440/171469 co-relation queries the response was YES. [2024-06-28 00:27:42,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30246 conditions, 4515 events. 2742/4515 cut-off events. For 171440/171469 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27844 event pairs, 875 based on Foata normal form. 27/4541 useless extension candidates. Maximal degree in co-relation 30117. Up to 4174 conditions per place. [2024-06-28 00:27:42,633 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 327 selfloop transitions, 52 changer transitions 0/384 dead transitions. [2024-06-28 00:27:42,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 384 transitions, 6161 flow [2024-06-28 00:27:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:27:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:27:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-28 00:27:42,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3547619047619048 [2024-06-28 00:27:42,635 INFO L175 Difference]: Start difference. First operand has 301 places, 368 transitions, 5338 flow. Second operand 10 states and 149 transitions. [2024-06-28 00:27:42,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 384 transitions, 6161 flow [2024-06-28 00:27:43,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 384 transitions, 6049 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 00:27:43,066 INFO L231 Difference]: Finished difference. Result has 303 places, 368 transitions, 5336 flow [2024-06-28 00:27:43,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5336, PETRI_PLACES=303, PETRI_TRANSITIONS=368} [2024-06-28 00:27:43,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-28 00:27:43,066 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 368 transitions, 5336 flow [2024-06-28 00:27:43,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:43,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:43,067 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] [2024-06-28 00:27:43,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:27:43,067 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:43,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:43,067 INFO L85 PathProgramCache]: Analyzing trace with hash 871792594, now seen corresponding path program 4 times [2024-06-28 00:27:43,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:43,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50171020] [2024-06-28 00:27:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:43,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:48,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:48,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50171020] [2024-06-28 00:27:48,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50171020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:48,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:48,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:48,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870197669] [2024-06-28 00:27:48,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:48,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:48,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:48,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:48,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:48,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:27:48,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 368 transitions, 5336 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:48,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:48,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:27:48,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:50,276 INFO L124 PetriNetUnfolderBase]: 2747/4510 cut-off events. [2024-06-28 00:27:50,276 INFO L125 PetriNetUnfolderBase]: For 169690/169696 co-relation queries the response was YES. [2024-06-28 00:27:50,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30379 conditions, 4510 events. 2747/4510 cut-off events. For 169690/169696 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27595 event pairs, 857 based on Foata normal form. 7/4516 useless extension candidates. Maximal degree in co-relation 30249. Up to 4212 conditions per place. [2024-06-28 00:27:50,321 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 65 changer transitions 0/387 dead transitions. [2024-06-28 00:27:50,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 387 transitions, 6298 flow [2024-06-28 00:27:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:27:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:27:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 160 transitions. [2024-06-28 00:27:50,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463203463203463 [2024-06-28 00:27:50,323 INFO L175 Difference]: Start difference. First operand has 303 places, 368 transitions, 5336 flow. Second operand 11 states and 160 transitions. [2024-06-28 00:27:50,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 387 transitions, 6298 flow [2024-06-28 00:27:50,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 387 transitions, 6167 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-28 00:27:50,806 INFO L231 Difference]: Finished difference. Result has 305 places, 372 transitions, 5402 flow [2024-06-28 00:27:50,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5205, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5402, PETRI_PLACES=305, PETRI_TRANSITIONS=372} [2024-06-28 00:27:50,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-28 00:27:50,807 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 372 transitions, 5402 flow [2024-06-28 00:27:50,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:50,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:50,807 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] [2024-06-28 00:27:50,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:27:50,807 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:50,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2081405220, now seen corresponding path program 5 times [2024-06-28 00:27:50,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:50,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753649461] [2024-06-28 00:27:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:50,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:55,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:55,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753649461] [2024-06-28 00:27:55,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753649461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:55,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:55,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:55,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777756565] [2024-06-28 00:27:55,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:55,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:55,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:55,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:55,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:55,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:27:55,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 372 transitions, 5402 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:55,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:55,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:27:55,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:57,442 INFO L124 PetriNetUnfolderBase]: 2752/4523 cut-off events. [2024-06-28 00:27:57,442 INFO L125 PetriNetUnfolderBase]: For 175013/175019 co-relation queries the response was YES. [2024-06-28 00:27:57,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30509 conditions, 4523 events. 2752/4523 cut-off events. For 175013/175019 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27712 event pairs, 857 based on Foata normal form. 7/4529 useless extension candidates. Maximal degree in co-relation 30378. Up to 4218 conditions per place. [2024-06-28 00:27:57,490 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 65 changer transitions 0/389 dead transitions. [2024-06-28 00:27:57,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 389 transitions, 6357 flow [2024-06-28 00:27:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:27:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:27:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-28 00:27:57,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-28 00:27:57,491 INFO L175 Difference]: Start difference. First operand has 305 places, 372 transitions, 5402 flow. Second operand 10 states and 152 transitions. [2024-06-28 00:27:57,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 389 transitions, 6357 flow [2024-06-28 00:27:57,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 389 transitions, 6236 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 00:27:58,001 INFO L231 Difference]: Finished difference. Result has 308 places, 375 transitions, 5468 flow [2024-06-28 00:27:58,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5288, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5468, PETRI_PLACES=308, PETRI_TRANSITIONS=375} [2024-06-28 00:27:58,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-28 00:27:58,002 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 375 transitions, 5468 flow [2024-06-28 00:27:58,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:58,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:58,002 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] [2024-06-28 00:27:58,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:27:58,002 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:58,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:58,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2115467154, now seen corresponding path program 6 times [2024-06-28 00:27:58,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:58,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149541766] [2024-06-28 00:27:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:58,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149541766] [2024-06-28 00:28:02,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149541766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:02,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:02,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:28:02,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296132109] [2024-06-28 00:28:02,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:02,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:28:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:02,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:28:02,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:28:02,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:28:02,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 375 transitions, 5468 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:02,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:02,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:28:02,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:04,772 INFO L124 PetriNetUnfolderBase]: 2749/4519 cut-off events. [2024-06-28 00:28:04,772 INFO L125 PetriNetUnfolderBase]: For 173711/173717 co-relation queries the response was YES. [2024-06-28 00:28:04,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30419 conditions, 4519 events. 2749/4519 cut-off events. For 173711/173717 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27666 event pairs, 857 based on Foata normal form. 7/4525 useless extension candidates. Maximal degree in co-relation 30288. Up to 4215 conditions per place. [2024-06-28 00:28:04,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 66 changer transitions 0/390 dead transitions. [2024-06-28 00:28:04,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 390 transitions, 6272 flow [2024-06-28 00:28:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:28:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:28:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 177 transitions. [2024-06-28 00:28:04,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-28 00:28:04,819 INFO L175 Difference]: Start difference. First operand has 308 places, 375 transitions, 5468 flow. Second operand 12 states and 177 transitions. [2024-06-28 00:28:04,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 390 transitions, 6272 flow [2024-06-28 00:28:05,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 390 transitions, 6122 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-28 00:28:05,309 INFO L231 Difference]: Finished difference. Result has 311 places, 375 transitions, 5459 flow [2024-06-28 00:28:05,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5318, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5459, PETRI_PLACES=311, PETRI_TRANSITIONS=375} [2024-06-28 00:28:05,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-28 00:28:05,309 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 375 transitions, 5459 flow [2024-06-28 00:28:05,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:05,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:05,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:05,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:28:05,310 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:05,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:05,310 INFO L85 PathProgramCache]: Analyzing trace with hash -727084055, now seen corresponding path program 1 times [2024-06-28 00:28:05,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:05,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308099770] [2024-06-28 00:28:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:05,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:11,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:11,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308099770] [2024-06-28 00:28:11,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308099770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:11,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:11,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:28:11,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347114533] [2024-06-28 00:28:11,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:11,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:28:11,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:28:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:28:11,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:28:11,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 375 transitions, 5459 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:11,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:11,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:28:11,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:13,769 INFO L124 PetriNetUnfolderBase]: 2833/4647 cut-off events. [2024-06-28 00:28:13,769 INFO L125 PetriNetUnfolderBase]: For 176147/176151 co-relation queries the response was YES. [2024-06-28 00:28:13,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31752 conditions, 4647 events. 2833/4647 cut-off events. For 176147/176151 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28364 event pairs, 670 based on Foata normal form. 2/4648 useless extension candidates. Maximal degree in co-relation 31621. Up to 4301 conditions per place. [2024-06-28 00:28:13,823 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 383 selfloop transitions, 48 changer transitions 0/436 dead transitions. [2024-06-28 00:28:13,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 436 transitions, 7033 flow [2024-06-28 00:28:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:28:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:28:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 00:28:13,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 00:28:13,824 INFO L175 Difference]: Start difference. First operand has 311 places, 375 transitions, 5459 flow. Second operand 9 states and 162 transitions. [2024-06-28 00:28:13,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 436 transitions, 7033 flow [2024-06-28 00:28:14,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 436 transitions, 6886 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 00:28:14,371 INFO L231 Difference]: Finished difference. Result has 313 places, 399 transitions, 5923 flow [2024-06-28 00:28:14,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5923, PETRI_PLACES=313, PETRI_TRANSITIONS=399} [2024-06-28 00:28:14,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-28 00:28:14,372 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 399 transitions, 5923 flow [2024-06-28 00:28:14,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:14,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:14,373 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] [2024-06-28 00:28:14,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:28:14,373 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:14,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:14,373 INFO L85 PathProgramCache]: Analyzing trace with hash -28696723, now seen corresponding path program 2 times [2024-06-28 00:28:14,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:14,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773749819] [2024-06-28 00:28:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:14,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:21,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:21,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773749819] [2024-06-28 00:28:21,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773749819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:21,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:21,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:28:21,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847998758] [2024-06-28 00:28:21,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:21,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:28:21,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:21,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:28:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:28:21,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:28:21,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 399 transitions, 5923 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:21,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:21,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:28:21,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:23,510 INFO L124 PetriNetUnfolderBase]: 2843/4663 cut-off events. [2024-06-28 00:28:23,511 INFO L125 PetriNetUnfolderBase]: For 184700/184704 co-relation queries the response was YES. [2024-06-28 00:28:23,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32522 conditions, 4663 events. 2843/4663 cut-off events. For 184700/184704 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28535 event pairs, 670 based on Foata normal form. 2/4664 useless extension candidates. Maximal degree in co-relation 32387. Up to 4329 conditions per place. [2024-06-28 00:28:23,568 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 386 selfloop transitions, 46 changer transitions 0/437 dead transitions. [2024-06-28 00:28:23,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 437 transitions, 7021 flow [2024-06-28 00:28:23,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:28:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:28:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-28 00:28:23,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-28 00:28:23,569 INFO L175 Difference]: Start difference. First operand has 313 places, 399 transitions, 5923 flow. Second operand 10 states and 164 transitions. [2024-06-28 00:28:23,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 437 transitions, 7021 flow [2024-06-28 00:28:24,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 437 transitions, 6929 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-28 00:28:24,150 INFO L231 Difference]: Finished difference. Result has 322 places, 406 transitions, 6065 flow [2024-06-28 00:28:24,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5851, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6065, PETRI_PLACES=322, PETRI_TRANSITIONS=406} [2024-06-28 00:28:24,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-28 00:28:24,150 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 406 transitions, 6065 flow [2024-06-28 00:28:24,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:24,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:24,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:24,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:28:24,151 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:24,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:24,151 INFO L85 PathProgramCache]: Analyzing trace with hash 148434797, now seen corresponding path program 3 times [2024-06-28 00:28:24,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:24,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415245253] [2024-06-28 00:28:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:24,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:30,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:30,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415245253] [2024-06-28 00:28:30,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415245253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:30,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:30,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:28:30,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650982312] [2024-06-28 00:28:30,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:30,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:28:30,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:30,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:28:30,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:28:30,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:28:30,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 406 transitions, 6065 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:30,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:30,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:28:30,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:32,770 INFO L124 PetriNetUnfolderBase]: 2858/4688 cut-off events. [2024-06-28 00:28:32,770 INFO L125 PetriNetUnfolderBase]: For 191591/191595 co-relation queries the response was YES. [2024-06-28 00:28:32,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32913 conditions, 4688 events. 2858/4688 cut-off events. For 191591/191595 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28687 event pairs, 670 based on Foata normal form. 2/4689 useless extension candidates. Maximal degree in co-relation 32774. Up to 4343 conditions per place. [2024-06-28 00:28:32,824 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 388 selfloop transitions, 56 changer transitions 0/449 dead transitions. [2024-06-28 00:28:32,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 449 transitions, 7232 flow [2024-06-28 00:28:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:28:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:28:32,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-28 00:28:32,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 00:28:32,826 INFO L175 Difference]: Start difference. First operand has 322 places, 406 transitions, 6065 flow. Second operand 12 states and 192 transitions. [2024-06-28 00:28:32,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 449 transitions, 7232 flow [2024-06-28 00:28:33,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 449 transitions, 7108 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 00:28:33,408 INFO L231 Difference]: Finished difference. Result has 328 places, 416 transitions, 6250 flow [2024-06-28 00:28:33,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5953, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6250, PETRI_PLACES=328, PETRI_TRANSITIONS=416} [2024-06-28 00:28:33,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-28 00:28:33,409 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 416 transitions, 6250 flow [2024-06-28 00:28:33,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:33,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:33,409 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] [2024-06-28 00:28:33,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:28:33,410 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:33,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:33,410 INFO L85 PathProgramCache]: Analyzing trace with hash -744395339, now seen corresponding path program 4 times [2024-06-28 00:28:33,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:33,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349950989] [2024-06-28 00:28:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:33,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:39,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:39,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349950989] [2024-06-28 00:28:39,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349950989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:39,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:39,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:28:39,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226355103] [2024-06-28 00:28:39,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:39,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:28:39,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:39,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:28:39,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:28:39,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:28:39,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 416 transitions, 6250 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:39,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:39,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:28:39,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:42,005 INFO L124 PetriNetUnfolderBase]: 3041/5004 cut-off events. [2024-06-28 00:28:42,005 INFO L125 PetriNetUnfolderBase]: For 206400/206419 co-relation queries the response was YES. [2024-06-28 00:28:42,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35004 conditions, 5004 events. 3041/5004 cut-off events. For 206400/206419 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 31150 event pairs, 739 based on Foata normal form. 5/5007 useless extension candidates. Maximal degree in co-relation 34864. Up to 4193 conditions per place. [2024-06-28 00:28:42,068 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 365 selfloop transitions, 151 changer transitions 0/521 dead transitions. [2024-06-28 00:28:42,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 521 transitions, 8690 flow [2024-06-28 00:28:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:28:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:28:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 00:28:42,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-28 00:28:42,070 INFO L175 Difference]: Start difference. First operand has 328 places, 416 transitions, 6250 flow. Second operand 9 states and 170 transitions. [2024-06-28 00:28:42,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 521 transitions, 8690 flow [2024-06-28 00:28:42,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 521 transitions, 8554 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-28 00:28:42,582 INFO L231 Difference]: Finished difference. Result has 332 places, 470 transitions, 7183 flow [2024-06-28 00:28:42,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6114, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7183, PETRI_PLACES=332, PETRI_TRANSITIONS=470} [2024-06-28 00:28:42,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-28 00:28:42,583 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 470 transitions, 7183 flow [2024-06-28 00:28:42,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:42,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:42,583 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] [2024-06-28 00:28:42,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:28:42,583 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:42,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:42,583 INFO L85 PathProgramCache]: Analyzing trace with hash -744096809, now seen corresponding path program 5 times [2024-06-28 00:28:42,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:42,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383688408] [2024-06-28 00:28:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:42,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:48,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:48,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383688408] [2024-06-28 00:28:48,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383688408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:48,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:48,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:28:48,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165348458] [2024-06-28 00:28:48,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:48,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:28:48,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:48,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:28:48,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:28:48,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:28:48,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 470 transitions, 7183 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:48,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:48,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:28:48,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:51,215 INFO L124 PetriNetUnfolderBase]: 3054/5026 cut-off events. [2024-06-28 00:28:51,215 INFO L125 PetriNetUnfolderBase]: For 218176/218195 co-relation queries the response was YES. [2024-06-28 00:28:51,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36262 conditions, 5026 events. 3054/5026 cut-off events. For 218176/218195 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31332 event pairs, 739 based on Foata normal form. 5/5029 useless extension candidates. Maximal degree in co-relation 36117. Up to 4208 conditions per place. [2024-06-28 00:28:51,279 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 361 selfloop transitions, 157 changer transitions 0/523 dead transitions. [2024-06-28 00:28:51,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 523 transitions, 9093 flow [2024-06-28 00:28:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:28:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:28:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 00:28:51,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 00:28:51,281 INFO L175 Difference]: Start difference. First operand has 332 places, 470 transitions, 7183 flow. Second operand 9 states and 166 transitions. [2024-06-28 00:28:51,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 523 transitions, 9093 flow [2024-06-28 00:28:52,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 523 transitions, 8986 flow, removed 51 selfloop flow, removed 1 redundant places. [2024-06-28 00:28:52,169 INFO L231 Difference]: Finished difference. Result has 341 places, 478 transitions, 7578 flow [2024-06-28 00:28:52,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7108, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7578, PETRI_PLACES=341, PETRI_TRANSITIONS=478} [2024-06-28 00:28:52,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-28 00:28:52,170 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 478 transitions, 7578 flow [2024-06-28 00:28:52,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:52,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:52,170 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] [2024-06-28 00:28:52,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:28:52,170 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:52,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1975984127, now seen corresponding path program 6 times [2024-06-28 00:28:52,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:52,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96401497] [2024-06-28 00:28:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:52,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:57,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:57,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96401497] [2024-06-28 00:28:57,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96401497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:57,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:57,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:28:57,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377645794] [2024-06-28 00:28:57,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:57,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:28:57,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:57,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:28:57,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:28:57,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:28:57,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 478 transitions, 7578 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:57,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:57,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:28:57,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:00,256 INFO L124 PetriNetUnfolderBase]: 3051/5022 cut-off events. [2024-06-28 00:29:00,256 INFO L125 PetriNetUnfolderBase]: For 221868/221887 co-relation queries the response was YES. [2024-06-28 00:29:00,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36357 conditions, 5022 events. 3051/5022 cut-off events. For 221868/221887 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31299 event pairs, 739 based on Foata normal form. 5/5025 useless extension candidates. Maximal degree in co-relation 36208. Up to 4205 conditions per place. [2024-06-28 00:29:00,317 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 370 selfloop transitions, 153 changer transitions 0/528 dead transitions. [2024-06-28 00:29:00,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 528 transitions, 9499 flow [2024-06-28 00:29:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:29:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:29:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 00:29:00,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 00:29:00,319 INFO L175 Difference]: Start difference. First operand has 341 places, 478 transitions, 7578 flow. Second operand 9 states and 172 transitions. [2024-06-28 00:29:00,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 528 transitions, 9499 flow [2024-06-28 00:29:01,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 528 transitions, 9176 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 00:29:01,133 INFO L231 Difference]: Finished difference. Result has 346 places, 481 transitions, 7687 flow [2024-06-28 00:29:01,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7255, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7687, PETRI_PLACES=346, PETRI_TRANSITIONS=481} [2024-06-28 00:29:01,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-28 00:29:01,133 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 481 transitions, 7687 flow [2024-06-28 00:29:01,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:01,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:01,133 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] [2024-06-28 00:29:01,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:29:01,133 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:01,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:01,134 INFO L85 PathProgramCache]: Analyzing trace with hash -744096437, now seen corresponding path program 1 times [2024-06-28 00:29:01,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:01,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481685179] [2024-06-28 00:29:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:01,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:06,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:06,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481685179] [2024-06-28 00:29:06,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481685179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:06,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:06,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:06,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779252916] [2024-06-28 00:29:06,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:06,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:06,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:06,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:29:06,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 481 transitions, 7687 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:06,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:06,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:29:06,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:08,765 INFO L124 PetriNetUnfolderBase]: 3128/5144 cut-off events. [2024-06-28 00:29:08,765 INFO L125 PetriNetUnfolderBase]: For 237907/237930 co-relation queries the response was YES. [2024-06-28 00:29:08,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37680 conditions, 5144 events. 3128/5144 cut-off events. For 237907/237930 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 32162 event pairs, 884 based on Foata normal form. 19/5161 useless extension candidates. Maximal degree in co-relation 37528. Up to 4545 conditions per place. [2024-06-28 00:29:08,828 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 427 selfloop transitions, 121 changer transitions 0/553 dead transitions. [2024-06-28 00:29:08,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 553 transitions, 9734 flow [2024-06-28 00:29:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:29:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:29:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-28 00:29:08,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 00:29:08,830 INFO L175 Difference]: Start difference. First operand has 346 places, 481 transitions, 7687 flow. Second operand 13 states and 208 transitions. [2024-06-28 00:29:08,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 553 transitions, 9734 flow [2024-06-28 00:29:09,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 553 transitions, 9473 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 00:29:09,867 INFO L231 Difference]: Finished difference. Result has 356 places, 510 transitions, 8225 flow [2024-06-28 00:29:09,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7426, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8225, PETRI_PLACES=356, PETRI_TRANSITIONS=510} [2024-06-28 00:29:09,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-28 00:29:09,867 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 510 transitions, 8225 flow [2024-06-28 00:29:09,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:09,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:09,868 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] [2024-06-28 00:29:09,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:29:09,868 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:09,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash -749637749, now seen corresponding path program 7 times [2024-06-28 00:29:09,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:09,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469690375] [2024-06-28 00:29:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:09,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:15,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:15,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469690375] [2024-06-28 00:29:15,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469690375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:15,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:15,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:15,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975977363] [2024-06-28 00:29:15,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:15,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:15,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:15,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:15,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:29:15,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 510 transitions, 8225 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:15,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:15,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:29:15,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:18,012 INFO L124 PetriNetUnfolderBase]: 3138/5150 cut-off events. [2024-06-28 00:29:18,012 INFO L125 PetriNetUnfolderBase]: For 243905/243930 co-relation queries the response was YES. [2024-06-28 00:29:18,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38203 conditions, 5150 events. 3138/5150 cut-off events. For 243905/243930 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32075 event pairs, 702 based on Foata normal form. 17/5166 useless extension candidates. Maximal degree in co-relation 38047. Up to 4583 conditions per place. [2024-06-28 00:29:18,079 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 447 selfloop transitions, 97 changer transitions 0/549 dead transitions. [2024-06-28 00:29:18,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 549 transitions, 9547 flow [2024-06-28 00:29:18,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:29:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:29:18,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 00:29:18,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 00:29:18,080 INFO L175 Difference]: Start difference. First operand has 356 places, 510 transitions, 8225 flow. Second operand 9 states and 158 transitions. [2024-06-28 00:29:18,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 549 transitions, 9547 flow [2024-06-28 00:29:18,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 549 transitions, 9286 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-28 00:29:18,923 INFO L231 Difference]: Finished difference. Result has 360 places, 519 transitions, 8292 flow [2024-06-28 00:29:18,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7968, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8292, PETRI_PLACES=360, PETRI_TRANSITIONS=519} [2024-06-28 00:29:18,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-28 00:29:18,923 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 519 transitions, 8292 flow [2024-06-28 00:29:18,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:18,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:18,924 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] [2024-06-28 00:29:18,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:29:18,924 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:18,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash -740371787, now seen corresponding path program 2 times [2024-06-28 00:29:18,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:18,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874393120] [2024-06-28 00:29:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:18,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:24,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:24,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874393120] [2024-06-28 00:29:24,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874393120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:24,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:24,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:24,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870612092] [2024-06-28 00:29:24,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:24,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:24,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:25,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:29:25,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 519 transitions, 8292 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:25,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:25,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:29:25,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:27,542 INFO L124 PetriNetUnfolderBase]: 3164/5203 cut-off events. [2024-06-28 00:29:27,542 INFO L125 PetriNetUnfolderBase]: For 256136/256165 co-relation queries the response was YES. [2024-06-28 00:29:27,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38523 conditions, 5203 events. 3164/5203 cut-off events. For 256136/256165 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32607 event pairs, 869 based on Foata normal form. 25/5227 useless extension candidates. Maximal degree in co-relation 38367. Up to 4722 conditions per place. [2024-06-28 00:29:27,604 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 466 selfloop transitions, 93 changer transitions 0/564 dead transitions. [2024-06-28 00:29:27,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 564 transitions, 9922 flow [2024-06-28 00:29:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:29:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:29:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 205 transitions. [2024-06-28 00:29:27,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37545787545787546 [2024-06-28 00:29:27,606 INFO L175 Difference]: Start difference. First operand has 360 places, 519 transitions, 8292 flow. Second operand 13 states and 205 transitions. [2024-06-28 00:29:27,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 564 transitions, 9922 flow [2024-06-28 00:29:28,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 564 transitions, 9691 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 00:29:28,618 INFO L231 Difference]: Finished difference. Result has 367 places, 526 transitions, 8345 flow [2024-06-28 00:29:28,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8061, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8345, PETRI_PLACES=367, PETRI_TRANSITIONS=526} [2024-06-28 00:29:28,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-28 00:29:28,619 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 526 transitions, 8345 flow [2024-06-28 00:29:28,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:28,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:28,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:28,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:29:28,619 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:28,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:28,619 INFO L85 PathProgramCache]: Analyzing trace with hash -740383319, now seen corresponding path program 8 times [2024-06-28 00:29:28,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:28,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013574924] [2024-06-28 00:29:28,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:28,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:35,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:35,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013574924] [2024-06-28 00:29:35,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013574924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:35,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:35,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:35,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278440026] [2024-06-28 00:29:35,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:35,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:35,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:35,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:29:35,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 526 transitions, 8345 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:35,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:35,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:29:35,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:37,884 INFO L124 PetriNetUnfolderBase]: 3182/5221 cut-off events. [2024-06-28 00:29:37,884 INFO L125 PetriNetUnfolderBase]: For 263725/263750 co-relation queries the response was YES. [2024-06-28 00:29:37,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38720 conditions, 5221 events. 3182/5221 cut-off events. For 263725/263750 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32617 event pairs, 703 based on Foata normal form. 17/5237 useless extension candidates. Maximal degree in co-relation 38563. Up to 4630 conditions per place. [2024-06-28 00:29:37,950 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 446 selfloop transitions, 112 changer transitions 0/563 dead transitions. [2024-06-28 00:29:37,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 563 transitions, 9813 flow [2024-06-28 00:29:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:29:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:29:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-28 00:29:37,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-28 00:29:37,951 INFO L175 Difference]: Start difference. First operand has 367 places, 526 transitions, 8345 flow. Second operand 12 states and 188 transitions. [2024-06-28 00:29:37,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 563 transitions, 9813 flow [2024-06-28 00:29:38,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 563 transitions, 9748 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 00:29:38,895 INFO L231 Difference]: Finished difference. Result has 376 places, 535 transitions, 8654 flow [2024-06-28 00:29:38,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8280, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8654, PETRI_PLACES=376, PETRI_TRANSITIONS=535} [2024-06-28 00:29:38,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-28 00:29:38,895 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 535 transitions, 8654 flow [2024-06-28 00:29:38,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:38,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:38,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:38,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:29:38,896 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:38,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:38,897 INFO L85 PathProgramCache]: Analyzing trace with hash 201600827, now seen corresponding path program 9 times [2024-06-28 00:29:38,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:38,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507088462] [2024-06-28 00:29:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:38,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:44,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507088462] [2024-06-28 00:29:44,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507088462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:44,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:44,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:44,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898020793] [2024-06-28 00:29:44,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:44,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:44,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:44,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:44,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:29:44,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 535 transitions, 8654 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:44,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:44,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:29:44,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:47,075 INFO L124 PetriNetUnfolderBase]: 3179/5219 cut-off events. [2024-06-28 00:29:47,075 INFO L125 PetriNetUnfolderBase]: For 270180/270205 co-relation queries the response was YES. [2024-06-28 00:29:47,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39029 conditions, 5219 events. 3179/5219 cut-off events. For 270180/270205 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32632 event pairs, 704 based on Foata normal form. 17/5235 useless extension candidates. Maximal degree in co-relation 38868. Up to 4627 conditions per place. [2024-06-28 00:29:47,147 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 444 selfloop transitions, 111 changer transitions 0/560 dead transitions. [2024-06-28 00:29:47,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 560 transitions, 9856 flow [2024-06-28 00:29:47,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:29:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:29:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-28 00:29:47,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-28 00:29:47,148 INFO L175 Difference]: Start difference. First operand has 376 places, 535 transitions, 8654 flow. Second operand 10 states and 163 transitions. [2024-06-28 00:29:47,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 560 transitions, 9856 flow [2024-06-28 00:29:48,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 560 transitions, 9616 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 00:29:48,293 INFO L231 Difference]: Finished difference. Result has 379 places, 535 transitions, 8642 flow [2024-06-28 00:29:48,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8414, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8642, PETRI_PLACES=379, PETRI_TRANSITIONS=535} [2024-06-28 00:29:48,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-28 00:29:48,294 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 535 transitions, 8642 flow [2024-06-28 00:29:48,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:48,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:48,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:48,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:29:48,294 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:48,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1966603775, now seen corresponding path program 3 times [2024-06-28 00:29:48,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:48,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323314986] [2024-06-28 00:29:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:48,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:54,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:54,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323314986] [2024-06-28 00:29:54,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323314986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:54,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:54,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493424362] [2024-06-28 00:29:54,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:54,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:54,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:54,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:54,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:54,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:29:54,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 535 transitions, 8642 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:54,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:54,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:29:54,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:57,085 INFO L124 PetriNetUnfolderBase]: 3173/5226 cut-off events. [2024-06-28 00:29:57,085 INFO L125 PetriNetUnfolderBase]: For 274906/274935 co-relation queries the response was YES. [2024-06-28 00:29:57,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38951 conditions, 5226 events. 3173/5226 cut-off events. For 274906/274935 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32858 event pairs, 869 based on Foata normal form. 25/5250 useless extension candidates. Maximal degree in co-relation 38790. Up to 4738 conditions per place. [2024-06-28 00:29:57,150 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 473 selfloop transitions, 93 changer transitions 0/571 dead transitions. [2024-06-28 00:29:57,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 571 transitions, 10089 flow [2024-06-28 00:29:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:29:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:29:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2024-06-28 00:29:57,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36813186813186816 [2024-06-28 00:29:57,152 INFO L175 Difference]: Start difference. First operand has 379 places, 535 transitions, 8642 flow. Second operand 13 states and 201 transitions. [2024-06-28 00:29:57,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 571 transitions, 10089 flow [2024-06-28 00:29:58,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 571 transitions, 9853 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-28 00:29:58,351 INFO L231 Difference]: Finished difference. Result has 383 places, 535 transitions, 8598 flow [2024-06-28 00:29:58,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8406, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8598, PETRI_PLACES=383, PETRI_TRANSITIONS=535} [2024-06-28 00:29:58,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-28 00:29:58,352 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 535 transitions, 8598 flow [2024-06-28 00:29:58,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:58,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:58,352 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] [2024-06-28 00:29:58,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:29:58,352 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:58,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:58,353 INFO L85 PathProgramCache]: Analyzing trace with hash -763136721, now seen corresponding path program 4 times [2024-06-28 00:29:58,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:58,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126518543] [2024-06-28 00:29:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:58,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:06,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:06,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126518543] [2024-06-28 00:30:06,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126518543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:06,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:06,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:30:06,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355048503] [2024-06-28 00:30:06,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:06,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:30:06,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:06,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:30:06,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:30:06,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:30:06,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 535 transitions, 8598 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:06,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:06,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:30:06,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:09,015 INFO L124 PetriNetUnfolderBase]: 3265/5362 cut-off events. [2024-06-28 00:30:09,015 INFO L125 PetriNetUnfolderBase]: For 290931/290960 co-relation queries the response was YES. [2024-06-28 00:30:09,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40384 conditions, 5362 events. 3265/5362 cut-off events. For 290931/290960 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 33711 event pairs, 868 based on Foata normal form. 25/5386 useless extension candidates. Maximal degree in co-relation 40222. Up to 4802 conditions per place. [2024-06-28 00:30:09,093 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 474 selfloop transitions, 126 changer transitions 0/605 dead transitions. [2024-06-28 00:30:09,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 605 transitions, 10950 flow [2024-06-28 00:30:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:30:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:30:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-28 00:30:09,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-28 00:30:09,095 INFO L175 Difference]: Start difference. First operand has 383 places, 535 transitions, 8598 flow. Second operand 12 states and 190 transitions. [2024-06-28 00:30:09,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 605 transitions, 10950 flow [2024-06-28 00:30:10,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 605 transitions, 10732 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-28 00:30:10,408 INFO L231 Difference]: Finished difference. Result has 388 places, 571 transitions, 9449 flow [2024-06-28 00:30:10,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8418, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9449, PETRI_PLACES=388, PETRI_TRANSITIONS=571} [2024-06-28 00:30:10,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-28 00:30:10,409 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 571 transitions, 9449 flow [2024-06-28 00:30:10,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:10,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:10,409 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] [2024-06-28 00:30:10,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:30:10,409 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:10,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:10,409 INFO L85 PathProgramCache]: Analyzing trace with hash -770499903, now seen corresponding path program 10 times [2024-06-28 00:30:10,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:10,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086146866] [2024-06-28 00:30:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:10,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:17,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:17,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086146866] [2024-06-28 00:30:17,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086146866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:17,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:17,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:30:17,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956036999] [2024-06-28 00:30:17,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:17,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:30:17,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:17,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:30:17,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:30:17,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:30:17,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 571 transitions, 9449 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:17,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:17,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:30:17,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:20,155 INFO L124 PetriNetUnfolderBase]: 3314/5427 cut-off events. [2024-06-28 00:30:20,155 INFO L125 PetriNetUnfolderBase]: For 304610/304635 co-relation queries the response was YES. [2024-06-28 00:30:20,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41541 conditions, 5427 events. 3314/5427 cut-off events. For 304610/304635 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 34046 event pairs, 704 based on Foata normal form. 17/5443 useless extension candidates. Maximal degree in co-relation 41375. Up to 4775 conditions per place. [2024-06-28 00:30:20,234 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 470 selfloop transitions, 147 changer transitions 0/622 dead transitions. [2024-06-28 00:30:20,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 622 transitions, 11594 flow [2024-06-28 00:30:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:30:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:30:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 199 transitions. [2024-06-28 00:30:20,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36446886446886445 [2024-06-28 00:30:20,236 INFO L175 Difference]: Start difference. First operand has 388 places, 571 transitions, 9449 flow. Second operand 13 states and 199 transitions. [2024-06-28 00:30:20,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 622 transitions, 11594 flow [2024-06-28 00:30:21,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 622 transitions, 11524 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-28 00:30:21,571 INFO L231 Difference]: Finished difference. Result has 404 places, 597 transitions, 10271 flow [2024-06-28 00:30:21,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9379, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10271, PETRI_PLACES=404, PETRI_TRANSITIONS=597} [2024-06-28 00:30:21,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-28 00:30:21,572 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 597 transitions, 10271 flow [2024-06-28 00:30:21,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:21,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:21,572 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] [2024-06-28 00:30:21,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:30:21,572 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:21,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:21,572 INFO L85 PathProgramCache]: Analyzing trace with hash -452380939, now seen corresponding path program 11 times [2024-06-28 00:30:21,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:21,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182057160] [2024-06-28 00:30:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:21,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:28,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:28,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182057160] [2024-06-28 00:30:28,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182057160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:28,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:28,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:30:28,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576324970] [2024-06-28 00:30:28,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:28,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:30:28,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:28,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:30:28,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:30:28,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:30:28,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 597 transitions, 10271 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:28,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:28,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:30:28,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:31,045 INFO L124 PetriNetUnfolderBase]: 3311/5420 cut-off events. [2024-06-28 00:30:31,045 INFO L125 PetriNetUnfolderBase]: For 307778/307782 co-relation queries the response was YES. [2024-06-28 00:30:31,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42126 conditions, 5420 events. 3311/5420 cut-off events. For 307778/307782 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 33967 event pairs, 672 based on Foata normal form. 2/5421 useless extension candidates. Maximal degree in co-relation 41953. Up to 4997 conditions per place. [2024-06-28 00:30:31,130 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 562 selfloop transitions, 49 changer transitions 0/616 dead transitions. [2024-06-28 00:30:31,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 616 transitions, 11539 flow [2024-06-28 00:30:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:30:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:30:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-28 00:30:31,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-28 00:30:31,132 INFO L175 Difference]: Start difference. First operand has 404 places, 597 transitions, 10271 flow. Second operand 10 states and 154 transitions. [2024-06-28 00:30:31,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 616 transitions, 11539 flow [2024-06-28 00:30:32,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 616 transitions, 11272 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 00:30:32,385 INFO L231 Difference]: Finished difference. Result has 409 places, 597 transitions, 10108 flow [2024-06-28 00:30:32,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10004, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10108, PETRI_PLACES=409, PETRI_TRANSITIONS=597} [2024-06-28 00:30:32,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-28 00:30:32,386 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 597 transitions, 10108 flow [2024-06-28 00:30:32,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:32,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:32,386 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] [2024-06-28 00:30:32,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:30:32,386 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:32,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:32,387 INFO L85 PathProgramCache]: Analyzing trace with hash -770493951, now seen corresponding path program 5 times [2024-06-28 00:30:32,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:32,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451494324] [2024-06-28 00:30:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:32,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:39,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:39,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451494324] [2024-06-28 00:30:39,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451494324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:39,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:39,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:30:39,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612174936] [2024-06-28 00:30:39,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:39,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:30:39,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:39,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:30:39,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:30:39,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:30:39,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 597 transitions, 10108 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:39,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:39,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:30:39,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:42,623 INFO L124 PetriNetUnfolderBase]: 3321/5462 cut-off events. [2024-06-28 00:30:42,623 INFO L125 PetriNetUnfolderBase]: For 321254/321283 co-relation queries the response was YES. [2024-06-28 00:30:42,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42090 conditions, 5462 events. 3321/5462 cut-off events. For 321254/321283 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 34633 event pairs, 868 based on Foata normal form. 25/5486 useless extension candidates. Maximal degree in co-relation 41916. Up to 4876 conditions per place. [2024-06-28 00:30:42,710 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 128 changer transitions 0/636 dead transitions. [2024-06-28 00:30:42,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 636 transitions, 12002 flow [2024-06-28 00:30:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:30:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:30:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 214 transitions. [2024-06-28 00:30:42,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-28 00:30:42,712 INFO L175 Difference]: Start difference. First operand has 409 places, 597 transitions, 10108 flow. Second operand 14 states and 214 transitions. [2024-06-28 00:30:42,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 636 transitions, 12002 flow [2024-06-28 00:30:44,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 636 transitions, 11895 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:30:44,038 INFO L231 Difference]: Finished difference. Result has 418 places, 600 transitions, 10304 flow [2024-06-28 00:30:44,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10001, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10304, PETRI_PLACES=418, PETRI_TRANSITIONS=600} [2024-06-28 00:30:44,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-28 00:30:44,039 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 600 transitions, 10304 flow [2024-06-28 00:30:44,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:44,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:44,039 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] [2024-06-28 00:30:44,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:30:44,039 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:44,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:44,040 INFO L85 PathProgramCache]: Analyzing trace with hash 455732085, now seen corresponding path program 12 times [2024-06-28 00:30:44,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:44,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439735478] [2024-06-28 00:30:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:44,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:51,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:51,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439735478] [2024-06-28 00:30:51,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439735478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:51,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:51,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:30:51,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975071153] [2024-06-28 00:30:51,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:51,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:30:51,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:51,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:30:51,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:30:51,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:30:51,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 600 transitions, 10304 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:51,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:51,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:30:51,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:54,209 INFO L124 PetriNetUnfolderBase]: 3318/5437 cut-off events. [2024-06-28 00:30:54,209 INFO L125 PetriNetUnfolderBase]: For 324602/324627 co-relation queries the response was YES. [2024-06-28 00:30:54,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42253 conditions, 5437 events. 3318/5437 cut-off events. For 324602/324627 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34183 event pairs, 703 based on Foata normal form. 17/5453 useless extension candidates. Maximal degree in co-relation 42079. Up to 4783 conditions per place. [2024-06-28 00:30:54,285 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 470 selfloop transitions, 146 changer transitions 0/621 dead transitions. [2024-06-28 00:30:54,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 621 transitions, 11726 flow [2024-06-28 00:30:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:30:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:30:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-28 00:30:54,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37445887445887444 [2024-06-28 00:30:54,287 INFO L175 Difference]: Start difference. First operand has 418 places, 600 transitions, 10304 flow. Second operand 11 states and 173 transitions. [2024-06-28 00:30:54,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 621 transitions, 11726 flow [2024-06-28 00:30:55,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 621 transitions, 11448 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 00:30:55,722 INFO L231 Difference]: Finished difference. Result has 422 places, 600 transitions, 10324 flow [2024-06-28 00:30:55,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10026, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10324, PETRI_PLACES=422, PETRI_TRANSITIONS=600} [2024-06-28 00:30:55,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-28 00:30:55,723 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 600 transitions, 10324 flow [2024-06-28 00:30:55,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:55,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:55,724 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] [2024-06-28 00:30:55,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:30:55,724 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:55,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash 345497309, now seen corresponding path program 6 times [2024-06-28 00:30:55,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:55,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654941737] [2024-06-28 00:30:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:55,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:02,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:02,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654941737] [2024-06-28 00:31:02,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654941737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:02,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:02,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:02,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317879394] [2024-06-28 00:31:02,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:02,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:02,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:02,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:02,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:02,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:31:02,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 600 transitions, 10324 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:02,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:02,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:31:02,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:05,945 INFO L124 PetriNetUnfolderBase]: 3312/5442 cut-off events. [2024-06-28 00:31:05,945 INFO L125 PetriNetUnfolderBase]: For 330989/331018 co-relation queries the response was YES. [2024-06-28 00:31:06,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42002 conditions, 5442 events. 3312/5442 cut-off events. For 330989/331018 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 34482 event pairs, 870 based on Foata normal form. 25/5466 useless extension candidates. Maximal degree in co-relation 41828. Up to 4867 conditions per place. [2024-06-28 00:31:06,029 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 505 selfloop transitions, 128 changer transitions 0/638 dead transitions. [2024-06-28 00:31:06,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 638 transitions, 12073 flow [2024-06-28 00:31:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 00:31:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 00:31:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 231 transitions. [2024-06-28 00:31:06,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-28 00:31:06,031 INFO L175 Difference]: Start difference. First operand has 422 places, 600 transitions, 10324 flow. Second operand 15 states and 231 transitions. [2024-06-28 00:31:06,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 638 transitions, 12073 flow [2024-06-28 00:31:07,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 638 transitions, 11743 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-28 00:31:07,457 INFO L231 Difference]: Finished difference. Result has 426 places, 600 transitions, 10257 flow [2024-06-28 00:31:07,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9994, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10257, PETRI_PLACES=426, PETRI_TRANSITIONS=600} [2024-06-28 00:31:07,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-28 00:31:07,458 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 600 transitions, 10257 flow [2024-06-28 00:31:07,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:07,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:07,458 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] [2024-06-28 00:31:07,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:31:07,458 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:07,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:07,459 INFO L85 PathProgramCache]: Analyzing trace with hash 584306399, now seen corresponding path program 1 times [2024-06-28 00:31:07,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:07,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977228579] [2024-06-28 00:31:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:07,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:12,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:12,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977228579] [2024-06-28 00:31:12,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977228579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:12,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:12,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:12,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691236007] [2024-06-28 00:31:12,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:12,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:12,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:12,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:12,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:31:12,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 600 transitions, 10257 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:12,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:12,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:31:12,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:14,968 INFO L124 PetriNetUnfolderBase]: 3309/5435 cut-off events. [2024-06-28 00:31:14,968 INFO L125 PetriNetUnfolderBase]: For 345102/345102 co-relation queries the response was YES. [2024-06-28 00:31:15,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41312 conditions, 5435 events. 3309/5435 cut-off events. For 345102/345102 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34236 event pairs, 660 based on Foata normal form. 16/5450 useless extension candidates. Maximal degree in co-relation 41137. Up to 4864 conditions per place. [2024-06-28 00:31:15,043 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 540 selfloop transitions, 86 changer transitions 0/631 dead transitions. [2024-06-28 00:31:15,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 631 transitions, 11637 flow [2024-06-28 00:31:15,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:31:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:31:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2024-06-28 00:31:15,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36813186813186816 [2024-06-28 00:31:15,044 INFO L175 Difference]: Start difference. First operand has 426 places, 600 transitions, 10257 flow. Second operand 13 states and 201 transitions. [2024-06-28 00:31:15,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 631 transitions, 11637 flow [2024-06-28 00:31:16,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 631 transitions, 11350 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-28 00:31:16,513 INFO L231 Difference]: Finished difference. Result has 425 places, 601 transitions, 10173 flow [2024-06-28 00:31:16,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9970, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10173, PETRI_PLACES=425, PETRI_TRANSITIONS=601} [2024-06-28 00:31:16,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-28 00:31:16,513 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 601 transitions, 10173 flow [2024-06-28 00:31:16,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:16,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:16,513 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] [2024-06-28 00:31:16,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:31:16,514 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:16,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:16,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1960877493, now seen corresponding path program 13 times [2024-06-28 00:31:16,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:16,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13668807] [2024-06-28 00:31:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:16,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:22,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:22,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13668807] [2024-06-28 00:31:22,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13668807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:22,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:22,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:22,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626810918] [2024-06-28 00:31:22,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:22,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:22,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:22,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:22,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:22,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:31:22,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 601 transitions, 10173 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:22,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:22,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:31:22,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:25,238 INFO L124 PetriNetUnfolderBase]: 3379/5548 cut-off events. [2024-06-28 00:31:25,238 INFO L125 PetriNetUnfolderBase]: For 325671/325677 co-relation queries the response was YES. [2024-06-28 00:31:25,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42355 conditions, 5548 events. 3379/5548 cut-off events. For 325671/325677 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 35096 event pairs, 685 based on Foata normal form. 2/5549 useless extension candidates. Maximal degree in co-relation 42179. Up to 4589 conditions per place. [2024-06-28 00:31:25,337 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 434 selfloop transitions, 224 changer transitions 0/663 dead transitions. [2024-06-28 00:31:25,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 663 transitions, 12562 flow [2024-06-28 00:31:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 00:31:25,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-28 00:31:25,338 INFO L175 Difference]: Start difference. First operand has 425 places, 601 transitions, 10173 flow. Second operand 9 states and 167 transitions. [2024-06-28 00:31:25,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 663 transitions, 12562 flow [2024-06-28 00:31:27,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 663 transitions, 12360 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-28 00:31:27,063 INFO L231 Difference]: Finished difference. Result has 425 places, 627 transitions, 10860 flow [2024-06-28 00:31:27,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9971, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10860, PETRI_PLACES=425, PETRI_TRANSITIONS=627} [2024-06-28 00:31:27,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-28 00:31:27,063 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 627 transitions, 10860 flow [2024-06-28 00:31:27,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:27,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:27,064 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] [2024-06-28 00:31:27,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:31:27,064 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:27,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:27,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1955630433, now seen corresponding path program 14 times [2024-06-28 00:31:27,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:27,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968639461] [2024-06-28 00:31:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:27,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:33,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:33,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968639461] [2024-06-28 00:31:33,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968639461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:33,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:33,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:33,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823781417] [2024-06-28 00:31:33,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:33,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:33,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:33,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:33,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:33,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:31:33,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 627 transitions, 10860 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:33,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:33,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:31:33,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:36,099 INFO L124 PetriNetUnfolderBase]: 3384/5555 cut-off events. [2024-06-28 00:31:36,099 INFO L125 PetriNetUnfolderBase]: For 334472/334478 co-relation queries the response was YES. [2024-06-28 00:31:36,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42895 conditions, 5555 events. 3384/5555 cut-off events. For 334472/334478 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35149 event pairs, 685 based on Foata normal form. 2/5556 useless extension candidates. Maximal degree in co-relation 42715. Up to 4595 conditions per place. [2024-06-28 00:31:36,194 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 428 selfloop transitions, 231 changer transitions 0/664 dead transitions. [2024-06-28 00:31:36,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 664 transitions, 12786 flow [2024-06-28 00:31:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 00:31:36,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 00:31:36,195 INFO L175 Difference]: Start difference. First operand has 425 places, 627 transitions, 10860 flow. Second operand 9 states and 165 transitions. [2024-06-28 00:31:36,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 664 transitions, 12786 flow [2024-06-28 00:31:37,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 664 transitions, 12456 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-28 00:31:37,772 INFO L231 Difference]: Finished difference. Result has 432 places, 631 transitions, 11090 flow [2024-06-28 00:31:37,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10547, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11090, PETRI_PLACES=432, PETRI_TRANSITIONS=631} [2024-06-28 00:31:37,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-28 00:31:37,773 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 631 transitions, 11090 flow [2024-06-28 00:31:37,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:37,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:37,773 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] [2024-06-28 00:31:37,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:31:37,773 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:37,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:37,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1552167313, now seen corresponding path program 15 times [2024-06-28 00:31:37,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:37,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495379431] [2024-06-28 00:31:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:37,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:43,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:43,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495379431] [2024-06-28 00:31:43,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495379431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:43,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:43,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:43,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204534648] [2024-06-28 00:31:43,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:43,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:43,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:43,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:43,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:43,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:31:43,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 631 transitions, 11090 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:43,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:43,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:31:43,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:46,124 INFO L124 PetriNetUnfolderBase]: 3394/5569 cut-off events. [2024-06-28 00:31:46,125 INFO L125 PetriNetUnfolderBase]: For 344339/344345 co-relation queries the response was YES. [2024-06-28 00:31:46,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43138 conditions, 5569 events. 3394/5569 cut-off events. For 344339/344345 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35214 event pairs, 685 based on Foata normal form. 2/5570 useless extension candidates. Maximal degree in co-relation 42954. Up to 4929 conditions per place. [2024-06-28 00:31:46,212 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 531 selfloop transitions, 126 changer transitions 0/662 dead transitions. [2024-06-28 00:31:46,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 662 transitions, 12561 flow [2024-06-28 00:31:46,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:31:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:31:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-28 00:31:46,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-28 00:31:46,214 INFO L175 Difference]: Start difference. First operand has 432 places, 631 transitions, 11090 flow. Second operand 10 states and 162 transitions. [2024-06-28 00:31:46,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 662 transitions, 12561 flow [2024-06-28 00:31:48,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 662 transitions, 12000 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:48,015 INFO L231 Difference]: Finished difference. Result has 436 places, 637 transitions, 10890 flow [2024-06-28 00:31:48,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10545, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10890, PETRI_PLACES=436, PETRI_TRANSITIONS=637} [2024-06-28 00:31:48,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-28 00:31:48,016 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 637 transitions, 10890 flow [2024-06-28 00:31:48,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:48,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:48,016 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] [2024-06-28 00:31:48,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 00:31:48,017 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:48,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:48,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1223043451, now seen corresponding path program 16 times [2024-06-28 00:31:48,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:48,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886247953] [2024-06-28 00:31:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:48,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:53,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:53,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886247953] [2024-06-28 00:31:53,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886247953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:53,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:53,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:53,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252949374] [2024-06-28 00:31:53,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:53,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:53,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:53,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:31:53,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 637 transitions, 10890 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:53,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:53,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:31:53,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:56,573 INFO L124 PetriNetUnfolderBase]: 3399/5586 cut-off events. [2024-06-28 00:31:56,573 INFO L125 PetriNetUnfolderBase]: For 348858/348864 co-relation queries the response was YES. [2024-06-28 00:31:56,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42929 conditions, 5586 events. 3399/5586 cut-off events. For 348858/348864 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 35443 event pairs, 684 based on Foata normal form. 2/5587 useless extension candidates. Maximal degree in co-relation 42743. Up to 4611 conditions per place. [2024-06-28 00:31:56,650 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 410 selfloop transitions, 258 changer transitions 0/673 dead transitions. [2024-06-28 00:31:56,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 673 transitions, 12667 flow [2024-06-28 00:31:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:31:56,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 00:31:56,652 INFO L175 Difference]: Start difference. First operand has 436 places, 637 transitions, 10890 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:31:56,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 673 transitions, 12667 flow [2024-06-28 00:31:58,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 673 transitions, 12456 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:58,186 INFO L231 Difference]: Finished difference. Result has 440 places, 641 transitions, 11266 flow [2024-06-28 00:31:58,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10679, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11266, PETRI_PLACES=440, PETRI_TRANSITIONS=641} [2024-06-28 00:31:58,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-28 00:31:58,187 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 641 transitions, 11266 flow [2024-06-28 00:31:58,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:58,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:58,187 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] [2024-06-28 00:31:58,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:31:58,187 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:58,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1337882903, now seen corresponding path program 7 times [2024-06-28 00:31:58,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:58,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080971498] [2024-06-28 00:31:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:58,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:04,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:04,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080971498] [2024-06-28 00:32:04,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080971498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:04,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:04,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:04,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484413516] [2024-06-28 00:32:04,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:04,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:04,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:04,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:04,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:04,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:32:04,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 641 transitions, 11266 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:04,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:04,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:32:04,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:07,168 INFO L124 PetriNetUnfolderBase]: 3430/5641 cut-off events. [2024-06-28 00:32:07,168 INFO L125 PetriNetUnfolderBase]: For 367925/367943 co-relation queries the response was YES. [2024-06-28 00:32:07,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44018 conditions, 5641 events. 3430/5641 cut-off events. For 367925/367943 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 35954 event pairs, 860 based on Foata normal form. 20/5660 useless extension candidates. Maximal degree in co-relation 43829. Up to 5030 conditions per place. [2024-06-28 00:32:07,247 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 548 selfloop transitions, 127 changer transitions 0/680 dead transitions. [2024-06-28 00:32:07,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 680 transitions, 13024 flow [2024-06-28 00:32:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:32:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:32:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 00:32:07,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-28 00:32:07,249 INFO L175 Difference]: Start difference. First operand has 440 places, 641 transitions, 11266 flow. Second operand 10 states and 167 transitions. [2024-06-28 00:32:07,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 680 transitions, 13024 flow [2024-06-28 00:32:09,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 680 transitions, 12614 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 00:32:09,036 INFO L231 Difference]: Finished difference. Result has 446 places, 651 transitions, 11290 flow [2024-06-28 00:32:09,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10860, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11290, PETRI_PLACES=446, PETRI_TRANSITIONS=651} [2024-06-28 00:32:09,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-28 00:32:09,037 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 651 transitions, 11290 flow [2024-06-28 00:32:09,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:09,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:09,037 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] [2024-06-28 00:32:09,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 00:32:09,038 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:09,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1546626001, now seen corresponding path program 8 times [2024-06-28 00:32:09,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:09,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011242884] [2024-06-28 00:32:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:09,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:15,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:15,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011242884] [2024-06-28 00:32:15,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011242884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:15,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:15,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:15,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987016916] [2024-06-28 00:32:15,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:15,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:15,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:15,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:32:15,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 651 transitions, 11290 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:15,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:15,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:32:15,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:18,252 INFO L124 PetriNetUnfolderBase]: 3440/5651 cut-off events. [2024-06-28 00:32:18,252 INFO L125 PetriNetUnfolderBase]: For 375248/375266 co-relation queries the response was YES. [2024-06-28 00:32:18,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43913 conditions, 5651 events. 3440/5651 cut-off events. For 375248/375266 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 35936 event pairs, 861 based on Foata normal form. 20/5670 useless extension candidates. Maximal degree in co-relation 43722. Up to 4986 conditions per place. [2024-06-28 00:32:18,325 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 539 selfloop transitions, 144 changer transitions 0/688 dead transitions. [2024-06-28 00:32:18,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 688 transitions, 13171 flow [2024-06-28 00:32:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:32:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:32:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-28 00:32:18,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-28 00:32:18,327 INFO L175 Difference]: Start difference. First operand has 446 places, 651 transitions, 11290 flow. Second operand 12 states and 191 transitions. [2024-06-28 00:32:18,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 688 transitions, 13171 flow [2024-06-28 00:32:20,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 688 transitions, 13029 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 00:32:20,171 INFO L231 Difference]: Finished difference. Result has 454 places, 654 transitions, 11497 flow [2024-06-28 00:32:20,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11148, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11497, PETRI_PLACES=454, PETRI_TRANSITIONS=654} [2024-06-28 00:32:20,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-28 00:32:20,172 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 654 transitions, 11497 flow [2024-06-28 00:32:20,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:20,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:20,172 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] [2024-06-28 00:32:20,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 00:32:20,172 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:20,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash 436177081, now seen corresponding path program 17 times [2024-06-28 00:32:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:20,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388507020] [2024-06-28 00:32:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:20,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:26,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388507020] [2024-06-28 00:32:26,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388507020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:26,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:26,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188635300] [2024-06-28 00:32:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:26,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:26,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:26,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:26,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:32:26,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 654 transitions, 11497 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:26,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:26,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:32:26,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:29,719 INFO L124 PetriNetUnfolderBase]: 3445/5652 cut-off events. [2024-06-28 00:32:29,719 INFO L125 PetriNetUnfolderBase]: For 380667/380673 co-relation queries the response was YES. [2024-06-28 00:32:29,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44317 conditions, 5652 events. 3445/5652 cut-off events. For 380667/380673 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 35888 event pairs, 686 based on Foata normal form. 2/5653 useless extension candidates. Maximal degree in co-relation 44123. Up to 4671 conditions per place. [2024-06-28 00:32:29,811 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 418 selfloop transitions, 261 changer transitions 0/684 dead transitions. [2024-06-28 00:32:29,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 684 transitions, 13276 flow [2024-06-28 00:32:29,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:32:29,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 00:32:29,812 INFO L175 Difference]: Start difference. First operand has 454 places, 654 transitions, 11497 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:32:29,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 684 transitions, 13276 flow [2024-06-28 00:32:31,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 684 transitions, 12820 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-28 00:32:31,966 INFO L231 Difference]: Finished difference. Result has 453 places, 657 transitions, 11610 flow [2024-06-28 00:32:31,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11041, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11610, PETRI_PLACES=453, PETRI_TRANSITIONS=657} [2024-06-28 00:32:31,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-28 00:32:31,967 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 657 transitions, 11610 flow [2024-06-28 00:32:31,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:31,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:31,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:31,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 00:32:31,967 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:31,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:31,967 INFO L85 PathProgramCache]: Analyzing trace with hash 790856203, now seen corresponding path program 9 times [2024-06-28 00:32:31,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:31,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133255068] [2024-06-28 00:32:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:31,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:36,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:36,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133255068] [2024-06-28 00:32:36,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133255068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:36,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:36,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:36,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773925646] [2024-06-28 00:32:36,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:36,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:36,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:36,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:36,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:36,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:32:36,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 657 transitions, 11610 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:36,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:36,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:32:36,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:38,746 INFO L124 PetriNetUnfolderBase]: 3492/5727 cut-off events. [2024-06-28 00:32:38,746 INFO L125 PetriNetUnfolderBase]: For 409604/409612 co-relation queries the response was YES. [2024-06-28 00:32:38,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45231 conditions, 5727 events. 3492/5727 cut-off events. For 409604/409612 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36456 event pairs, 855 based on Foata normal form. 11/5737 useless extension candidates. Maximal degree in co-relation 45038. Up to 4726 conditions per place. [2024-06-28 00:32:38,826 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 416 selfloop transitions, 310 changer transitions 0/731 dead transitions. [2024-06-28 00:32:38,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 731 transitions, 14213 flow [2024-06-28 00:32:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:32:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:32:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 245 transitions. [2024-06-28 00:32:38,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 00:32:38,828 INFO L175 Difference]: Start difference. First operand has 453 places, 657 transitions, 11610 flow. Second operand 14 states and 245 transitions. [2024-06-28 00:32:38,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 731 transitions, 14213 flow [2024-06-28 00:32:41,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 731 transitions, 13642 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 00:32:41,150 INFO L231 Difference]: Finished difference. Result has 463 places, 684 transitions, 12082 flow [2024-06-28 00:32:41,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11039, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12082, PETRI_PLACES=463, PETRI_TRANSITIONS=684} [2024-06-28 00:32:41,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-28 00:32:41,151 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 684 transitions, 12082 flow [2024-06-28 00:32:41,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:41,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:41,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:41,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 00:32:41,152 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:41,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1577605393, now seen corresponding path program 10 times [2024-06-28 00:32:41,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:41,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716605870] [2024-06-28 00:32:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:41,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:46,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:46,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716605870] [2024-06-28 00:32:46,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716605870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:46,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:46,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:46,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230468343] [2024-06-28 00:32:46,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:46,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:46,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:46,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:46,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:46,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:32:46,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 684 transitions, 12082 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:46,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:46,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:32:46,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:48,803 INFO L124 PetriNetUnfolderBase]: 3486/5723 cut-off events. [2024-06-28 00:32:48,803 INFO L125 PetriNetUnfolderBase]: For 420000/420018 co-relation queries the response was YES. [2024-06-28 00:32:48,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45870 conditions, 5723 events. 3486/5723 cut-off events. For 420000/420018 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 36461 event pairs, 860 based on Foata normal form. 20/5742 useless extension candidates. Maximal degree in co-relation 45674. Up to 5121 conditions per place. [2024-06-28 00:32:48,890 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 574 selfloop transitions, 127 changer transitions 0/706 dead transitions. [2024-06-28 00:32:48,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 706 transitions, 13557 flow [2024-06-28 00:32:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:32:48,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:32:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-28 00:32:48,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-28 00:32:48,891 INFO L175 Difference]: Start difference. First operand has 463 places, 684 transitions, 12082 flow. Second operand 10 states and 157 transitions. [2024-06-28 00:32:48,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 706 transitions, 13557 flow [2024-06-28 00:32:51,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 706 transitions, 13088 flow, removed 108 selfloop flow, removed 8 redundant places. [2024-06-28 00:32:51,339 INFO L231 Difference]: Finished difference. Result has 465 places, 684 transitions, 11883 flow [2024-06-28 00:32:51,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11621, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11883, PETRI_PLACES=465, PETRI_TRANSITIONS=684} [2024-06-28 00:32:51,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-28 00:32:51,340 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 684 transitions, 11883 flow [2024-06-28 00:32:51,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:51,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:51,341 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] [2024-06-28 00:32:51,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 00:32:51,341 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:51,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1546626373, now seen corresponding path program 18 times [2024-06-28 00:32:51,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:51,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490582039] [2024-06-28 00:32:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:51,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:57,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:57,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490582039] [2024-06-28 00:32:57,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490582039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:57,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:57,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:57,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361597348] [2024-06-28 00:32:57,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:57,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:57,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:57,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:57,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:57,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:32:57,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 684 transitions, 11883 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:57,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:57,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:32:57,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:00,551 INFO L124 PetriNetUnfolderBase]: 3491/5712 cut-off events. [2024-06-28 00:33:00,551 INFO L125 PetriNetUnfolderBase]: For 421150/421156 co-relation queries the response was YES. [2024-06-28 00:33:00,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45547 conditions, 5712 events. 3491/5712 cut-off events. For 421150/421156 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36146 event pairs, 687 based on Foata normal form. 2/5713 useless extension candidates. Maximal degree in co-relation 45352. Up to 4734 conditions per place. [2024-06-28 00:33:00,628 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 468 selfloop transitions, 242 changer transitions 0/715 dead transitions. [2024-06-28 00:33:00,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 715 transitions, 13914 flow [2024-06-28 00:33:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:33:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:33:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 00:33:00,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 00:33:00,630 INFO L175 Difference]: Start difference. First operand has 465 places, 684 transitions, 11883 flow. Second operand 9 states and 162 transitions. [2024-06-28 00:33:00,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 715 transitions, 13914 flow [2024-06-28 00:33:02,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 715 transitions, 13640 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 00:33:02,900 INFO L231 Difference]: Finished difference. Result has 467 places, 687 transitions, 12148 flow [2024-06-28 00:33:02,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11609, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12148, PETRI_PLACES=467, PETRI_TRANSITIONS=687} [2024-06-28 00:33:02,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-28 00:33:02,901 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 687 transitions, 12148 flow [2024-06-28 00:33:02,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:02,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:02,901 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] [2024-06-28 00:33:02,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 00:33:02,901 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:02,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:02,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1964895465, now seen corresponding path program 11 times [2024-06-28 00:33:02,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:02,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043414420] [2024-06-28 00:33:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:02,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:09,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:09,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043414420] [2024-06-28 00:33:09,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043414420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:09,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:09,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:33:09,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660720921] [2024-06-28 00:33:09,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:09,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:33:09,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:09,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:33:09,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:33:09,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:33:09,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 687 transitions, 12148 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:09,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:09,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:33:09,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:12,228 INFO L124 PetriNetUnfolderBase]: 3501/5750 cut-off events. [2024-06-28 00:33:12,228 INFO L125 PetriNetUnfolderBase]: For 437155/437173 co-relation queries the response was YES. [2024-06-28 00:33:12,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46141 conditions, 5750 events. 3501/5750 cut-off events. For 437155/437173 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36698 event pairs, 859 based on Foata normal form. 20/5769 useless extension candidates. Maximal degree in co-relation 45944. Up to 5218 conditions per place. [2024-06-28 00:33:12,324 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 630 selfloop transitions, 84 changer transitions 0/719 dead transitions. [2024-06-28 00:33:12,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 719 transitions, 14085 flow [2024-06-28 00:33:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:33:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:33:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-28 00:33:12,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-28 00:33:12,326 INFO L175 Difference]: Start difference. First operand has 467 places, 687 transitions, 12148 flow. Second operand 11 states and 177 transitions. [2024-06-28 00:33:12,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 719 transitions, 14085 flow [2024-06-28 00:33:14,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 719 transitions, 13620 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 00:33:14,673 INFO L231 Difference]: Finished difference. Result has 473 places, 690 transitions, 11904 flow [2024-06-28 00:33:14,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11683, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11904, PETRI_PLACES=473, PETRI_TRANSITIONS=690} [2024-06-28 00:33:14,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-28 00:33:14,675 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 690 transitions, 11904 flow [2024-06-28 00:33:14,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:14,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:14,675 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] [2024-06-28 00:33:14,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 00:33:14,675 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:14,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash 790440121, now seen corresponding path program 19 times [2024-06-28 00:33:14,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:14,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310319321] [2024-06-28 00:33:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:14,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:20,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:20,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310319321] [2024-06-28 00:33:20,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310319321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:20,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:20,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:33:20,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693748983] [2024-06-28 00:33:20,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:20,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:33:20,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:20,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:33:20,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:33:20,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:33:20,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 690 transitions, 11904 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:20,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:20,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:33:20,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:23,461 INFO L124 PetriNetUnfolderBase]: 3514/5752 cut-off events. [2024-06-28 00:33:23,461 INFO L125 PetriNetUnfolderBase]: For 442867/442873 co-relation queries the response was YES. [2024-06-28 00:33:23,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45998 conditions, 5752 events. 3514/5752 cut-off events. For 442867/442873 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36470 event pairs, 686 based on Foata normal form. 2/5753 useless extension candidates. Maximal degree in co-relation 45799. Up to 4763 conditions per place. [2024-06-28 00:33:23,554 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 434 selfloop transitions, 280 changer transitions 0/719 dead transitions. [2024-06-28 00:33:23,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 719 transitions, 13819 flow [2024-06-28 00:33:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:33:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:33:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 00:33:23,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 00:33:23,556 INFO L175 Difference]: Start difference. First operand has 473 places, 690 transitions, 11904 flow. Second operand 9 states and 155 transitions. [2024-06-28 00:33:23,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 719 transitions, 13819 flow [2024-06-28 00:33:25,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 719 transitions, 13628 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-28 00:33:25,784 INFO L231 Difference]: Finished difference. Result has 473 places, 696 transitions, 12374 flow [2024-06-28 00:33:25,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11713, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12374, PETRI_PLACES=473, PETRI_TRANSITIONS=696} [2024-06-28 00:33:25,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-28 00:33:25,784 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 696 transitions, 12374 flow [2024-06-28 00:33:25,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:25,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:25,785 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] [2024-06-28 00:33:25,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 00:33:25,785 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:25,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:25,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1542907303, now seen corresponding path program 20 times [2024-06-28 00:33:25,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:25,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40954411] [2024-06-28 00:33:25,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:25,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:31,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:31,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40954411] [2024-06-28 00:33:31,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40954411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:31,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:31,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:33:31,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120590646] [2024-06-28 00:33:31,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:31,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:33:31,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:31,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:33:31,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:33:31,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:33:31,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 696 transitions, 12374 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:31,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:31,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:33:31,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:34,075 INFO L124 PetriNetUnfolderBase]: 3511/5752 cut-off events. [2024-06-28 00:33:34,076 INFO L125 PetriNetUnfolderBase]: For 451134/451140 co-relation queries the response was YES. [2024-06-28 00:33:34,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46528 conditions, 5752 events. 3511/5752 cut-off events. For 451134/451140 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36485 event pairs, 685 based on Foata normal form. 2/5753 useless extension candidates. Maximal degree in co-relation 46327. Up to 5082 conditions per place. [2024-06-28 00:33:34,162 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 581 selfloop transitions, 132 changer transitions 0/718 dead transitions. [2024-06-28 00:33:34,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 718 transitions, 14024 flow [2024-06-28 00:33:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:33:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:33:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-28 00:33:34,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-28 00:33:34,163 INFO L175 Difference]: Start difference. First operand has 473 places, 696 transitions, 12374 flow. Second operand 10 states and 161 transitions. [2024-06-28 00:33:34,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 718 transitions, 14024 flow [2024-06-28 00:33:36,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 718 transitions, 13660 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 00:33:36,736 INFO L231 Difference]: Finished difference. Result has 478 places, 696 transitions, 12280 flow [2024-06-28 00:33:36,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12010, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12280, PETRI_PLACES=478, PETRI_TRANSITIONS=696} [2024-06-28 00:33:36,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-28 00:33:36,737 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 696 transitions, 12280 flow [2024-06-28 00:33:36,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:36,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:36,738 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, 1] [2024-06-28 00:33:36,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 00:33:36,738 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:36,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:36,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1964889513, now seen corresponding path program 21 times [2024-06-28 00:33:36,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:36,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951303088] [2024-06-28 00:33:36,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:36,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:42,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:42,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951303088] [2024-06-28 00:33:42,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951303088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:42,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:42,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:33:42,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398929455] [2024-06-28 00:33:42,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:42,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:33:42,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:42,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:33:42,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:33:43,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:33:43,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 696 transitions, 12280 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:43,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:43,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:33:43,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:46,014 INFO L124 PetriNetUnfolderBase]: 3508/5752 cut-off events. [2024-06-28 00:33:46,014 INFO L125 PetriNetUnfolderBase]: For 456533/456539 co-relation queries the response was YES. [2024-06-28 00:33:46,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46232 conditions, 5752 events. 3508/5752 cut-off events. For 456533/456539 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36532 event pairs, 685 based on Foata normal form. 2/5753 useless extension candidates. Maximal degree in co-relation 46029. Up to 5079 conditions per place. [2024-06-28 00:33:46,113 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 581 selfloop transitions, 133 changer transitions 0/719 dead transitions. [2024-06-28 00:33:46,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 719 transitions, 13762 flow [2024-06-28 00:33:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:33:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:33:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-28 00:33:46,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 00:33:46,115 INFO L175 Difference]: Start difference. First operand has 478 places, 696 transitions, 12280 flow. Second operand 11 states and 176 transitions. [2024-06-28 00:33:46,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 719 transitions, 13762 flow [2024-06-28 00:33:48,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 719 transitions, 13518 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 00:33:48,771 INFO L231 Difference]: Finished difference. Result has 483 places, 696 transitions, 12308 flow [2024-06-28 00:33:48,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12036, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12308, PETRI_PLACES=483, PETRI_TRANSITIONS=696} [2024-06-28 00:33:48,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-28 00:33:48,771 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 696 transitions, 12308 flow [2024-06-28 00:33:48,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:48,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:48,772 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] [2024-06-28 00:33:48,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 00:33:48,772 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:48,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:48,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1964901045, now seen corresponding path program 12 times [2024-06-28 00:33:48,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:48,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785542289] [2024-06-28 00:33:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:48,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:54,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:54,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785542289] [2024-06-28 00:33:54,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785542289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:54,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:54,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:33:54,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263507859] [2024-06-28 00:33:54,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:54,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:33:54,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:54,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:33:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:33:54,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:33:54,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 696 transitions, 12308 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:54,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:54,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:33:54,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:57,732 INFO L124 PetriNetUnfolderBase]: 3502/5756 cut-off events. [2024-06-28 00:33:57,732 INFO L125 PetriNetUnfolderBase]: For 462969/462987 co-relation queries the response was YES. [2024-06-28 00:33:57,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46132 conditions, 5756 events. 3502/5756 cut-off events. For 462969/462987 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 36800 event pairs, 860 based on Foata normal form. 20/5775 useless extension candidates. Maximal degree in co-relation 45928. Up to 5223 conditions per place. [2024-06-28 00:33:57,827 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 636 selfloop transitions, 84 changer transitions 0/725 dead transitions. [2024-06-28 00:33:57,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 725 transitions, 14050 flow [2024-06-28 00:33:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:33:57,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:33:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 195 transitions. [2024-06-28 00:33:57,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-28 00:33:57,829 INFO L175 Difference]: Start difference. First operand has 483 places, 696 transitions, 12308 flow. Second operand 13 states and 195 transitions. [2024-06-28 00:33:57,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 725 transitions, 14050 flow [2024-06-28 00:34:00,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 725 transitions, 13758 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-28 00:34:00,368 INFO L231 Difference]: Finished difference. Result has 487 places, 696 transitions, 12191 flow [2024-06-28 00:34:00,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12016, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12191, PETRI_PLACES=487, PETRI_TRANSITIONS=696} [2024-06-28 00:34:00,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-28 00:34:00,369 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 696 transitions, 12191 flow [2024-06-28 00:34:00,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:00,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:00,369 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] [2024-06-28 00:34:00,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 00:34:00,370 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:00,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:00,370 INFO L85 PathProgramCache]: Analyzing trace with hash 75040221, now seen corresponding path program 1 times [2024-06-28 00:34:00,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:00,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892378532] [2024-06-28 00:34:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:00,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:04,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:04,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892378532] [2024-06-28 00:34:04,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892378532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:04,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:04,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:34:04,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675640144] [2024-06-28 00:34:04,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:04,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:34:04,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:04,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:34:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:34:04,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:34:04,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 696 transitions, 12191 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:04,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:04,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:34:04,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:06,948 INFO L124 PetriNetUnfolderBase]: 3562/5832 cut-off events. [2024-06-28 00:34:06,948 INFO L125 PetriNetUnfolderBase]: For 468980/468980 co-relation queries the response was YES. [2024-06-28 00:34:07,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46720 conditions, 5832 events. 3562/5832 cut-off events. For 468980/468980 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 37115 event pairs, 670 based on Foata normal form. 2/5833 useless extension candidates. Maximal degree in co-relation 46515. Up to 4810 conditions per place. [2024-06-28 00:34:07,047 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 518 selfloop transitions, 237 changer transitions 0/760 dead transitions. [2024-06-28 00:34:07,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 760 transitions, 14610 flow [2024-06-28 00:34:07,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:34:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:34:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 217 transitions. [2024-06-28 00:34:07,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-06-28 00:34:07,049 INFO L175 Difference]: Start difference. First operand has 487 places, 696 transitions, 12191 flow. Second operand 13 states and 217 transitions. [2024-06-28 00:34:07,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 760 transitions, 14610 flow [2024-06-28 00:34:09,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 760 transitions, 14405 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-28 00:34:09,214 INFO L231 Difference]: Finished difference. Result has 488 places, 722 transitions, 12911 flow [2024-06-28 00:34:09,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11986, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12911, PETRI_PLACES=488, PETRI_TRANSITIONS=722} [2024-06-28 00:34:09,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-28 00:34:09,215 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 722 transitions, 12911 flow [2024-06-28 00:34:09,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:09,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:09,215 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] [2024-06-28 00:34:09,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 00:34:09,216 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:09,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash 75040407, now seen corresponding path program 13 times [2024-06-28 00:34:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:09,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041467345] [2024-06-28 00:34:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:09,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:13,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:13,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041467345] [2024-06-28 00:34:13,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041467345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:13,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:13,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:34:13,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246754221] [2024-06-28 00:34:13,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:13,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:34:13,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:34:13,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:34:13,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:34:13,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 722 transitions, 12911 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:13,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:13,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:34:13,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:17,301 INFO L124 PetriNetUnfolderBase]: 3654/5992 cut-off events. [2024-06-28 00:34:17,301 INFO L125 PetriNetUnfolderBase]: For 524118/524126 co-relation queries the response was YES. [2024-06-28 00:34:17,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49446 conditions, 5992 events. 3654/5992 cut-off events. For 524118/524126 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 38514 event pairs, 857 based on Foata normal form. 11/6002 useless extension candidates. Maximal degree in co-relation 49240. Up to 5181 conditions per place. [2024-06-28 00:34:17,398 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 549 selfloop transitions, 253 changer transitions 0/807 dead transitions. [2024-06-28 00:34:17,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 807 transitions, 16100 flow [2024-06-28 00:34:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-28 00:34:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-28 00:34:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 286 transitions. [2024-06-28 00:34:17,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-28 00:34:17,400 INFO L175 Difference]: Start difference. First operand has 488 places, 722 transitions, 12911 flow. Second operand 18 states and 286 transitions. [2024-06-28 00:34:17,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 807 transitions, 16100 flow [2024-06-28 00:34:19,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 807 transitions, 15932 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-28 00:34:19,960 INFO L231 Difference]: Finished difference. Result has 503 places, 765 transitions, 14151 flow [2024-06-28 00:34:19,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12743, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=14151, PETRI_PLACES=503, PETRI_TRANSITIONS=765} [2024-06-28 00:34:19,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-28 00:34:19,961 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 765 transitions, 14151 flow [2024-06-28 00:34:19,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:19,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:19,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:19,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 00:34:19,961 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:19,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:19,961 INFO L85 PathProgramCache]: Analyzing trace with hash 849318514, now seen corresponding path program 1 times [2024-06-28 00:34:19,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:19,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556149438] [2024-06-28 00:34:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:19,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:25,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:25,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556149438] [2024-06-28 00:34:25,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556149438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:25,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:25,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:34:25,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860704253] [2024-06-28 00:34:25,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:25,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:34:25,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:25,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:34:25,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:34:25,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:34:25,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 765 transitions, 14151 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:25,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:25,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:34:25,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:27,733 INFO L124 PetriNetUnfolderBase]: 3639/5965 cut-off events. [2024-06-28 00:34:27,733 INFO L125 PetriNetUnfolderBase]: For 545706/545724 co-relation queries the response was YES. [2024-06-28 00:34:27,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50390 conditions, 5965 events. 3639/5965 cut-off events. For 545706/545724 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 38292 event pairs, 859 based on Foata normal form. 19/5983 useless extension candidates. Maximal degree in co-relation 50178. Up to 5439 conditions per place. [2024-06-28 00:34:27,827 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 710 selfloop transitions, 66 changer transitions 0/781 dead transitions. [2024-06-28 00:34:27,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 781 transitions, 15741 flow [2024-06-28 00:34:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:34:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:34:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 00:34:27,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 00:34:27,828 INFO L175 Difference]: Start difference. First operand has 503 places, 765 transitions, 14151 flow. Second operand 8 states and 131 transitions. [2024-06-28 00:34:27,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 781 transitions, 15741 flow [2024-06-28 00:34:30,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 781 transitions, 14930 flow, removed 193 selfloop flow, removed 10 redundant places. [2024-06-28 00:34:30,748 INFO L231 Difference]: Finished difference. Result has 501 places, 765 transitions, 13480 flow [2024-06-28 00:34:30,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13340, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13480, PETRI_PLACES=501, PETRI_TRANSITIONS=765} [2024-06-28 00:34:30,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-28 00:34:30,748 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 765 transitions, 13480 flow [2024-06-28 00:34:30,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:30,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:30,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:30,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 00:34:30,749 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:30,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash 62153397, now seen corresponding path program 14 times [2024-06-28 00:34:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:30,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391531352] [2024-06-28 00:34:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:30,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:36,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:36,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391531352] [2024-06-28 00:34:36,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391531352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:36,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:36,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:34:36,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594115063] [2024-06-28 00:34:36,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:36,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:34:36,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:36,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:34:36,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:34:36,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:34:36,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 765 transitions, 13480 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:36,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:36,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:34:36,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:39,415 INFO L124 PetriNetUnfolderBase]: 3649/5971 cut-off events. [2024-06-28 00:34:39,415 INFO L125 PetriNetUnfolderBase]: For 551493/551511 co-relation queries the response was YES. [2024-06-28 00:34:39,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49786 conditions, 5971 events. 3649/5971 cut-off events. For 551493/551511 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 38160 event pairs, 866 based on Foata normal form. 20/5990 useless extension candidates. Maximal degree in co-relation 49573. Up to 5409 conditions per place. [2024-06-28 00:34:39,506 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 688 selfloop transitions, 99 changer transitions 0/792 dead transitions. [2024-06-28 00:34:39,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 792 transitions, 15416 flow [2024-06-28 00:34:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:34:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:34:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 179 transitions. [2024-06-28 00:34:39,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3551587301587302 [2024-06-28 00:34:39,508 INFO L175 Difference]: Start difference. First operand has 501 places, 765 transitions, 13480 flow. Second operand 12 states and 179 transitions. [2024-06-28 00:34:39,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 792 transitions, 15416 flow [2024-06-28 00:34:42,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 792 transitions, 15294 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:34:42,747 INFO L231 Difference]: Finished difference. Result has 507 places, 770 transitions, 13655 flow [2024-06-28 00:34:42,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13360, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13655, PETRI_PLACES=507, PETRI_TRANSITIONS=770} [2024-06-28 00:34:42,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-28 00:34:42,748 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 770 transitions, 13655 flow [2024-06-28 00:34:42,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:42,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:42,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:42,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 00:34:42,748 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:42,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:42,748 INFO L85 PathProgramCache]: Analyzing trace with hash 965913859, now seen corresponding path program 1 times [2024-06-28 00:34:42,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:42,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455681638] [2024-06-28 00:34:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:42,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:47,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:47,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455681638] [2024-06-28 00:34:47,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455681638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:47,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:47,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:34:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544892107] [2024-06-28 00:34:47,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:47,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:34:47,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:47,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:34:47,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:34:47,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:34:47,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 770 transitions, 13655 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:47,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:47,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:34:47,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:49,945 INFO L124 PetriNetUnfolderBase]: 3666/5993 cut-off events. [2024-06-28 00:34:49,946 INFO L125 PetriNetUnfolderBase]: For 551089/551097 co-relation queries the response was YES. [2024-06-28 00:34:50,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50005 conditions, 5993 events. 3666/5993 cut-off events. For 551089/551097 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38329 event pairs, 861 based on Foata normal form. 11/6003 useless extension candidates. Maximal degree in co-relation 49791. Up to 5184 conditions per place. [2024-06-28 00:34:50,049 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 264 changer transitions 0/817 dead transitions. [2024-06-28 00:34:50,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 817 transitions, 16051 flow [2024-06-28 00:34:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:34:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:34:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 236 transitions. [2024-06-28 00:34:50,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-28 00:34:50,053 INFO L175 Difference]: Start difference. First operand has 507 places, 770 transitions, 13655 flow. Second operand 14 states and 236 transitions. [2024-06-28 00:34:50,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 817 transitions, 16051 flow [2024-06-28 00:34:53,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 817 transitions, 15822 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-28 00:34:53,436 INFO L231 Difference]: Finished difference. Result has 513 places, 779 transitions, 14071 flow [2024-06-28 00:34:53,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13426, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14071, PETRI_PLACES=513, PETRI_TRANSITIONS=779} [2024-06-28 00:34:53,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-28 00:34:53,437 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 779 transitions, 14071 flow [2024-06-28 00:34:53,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:53,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:53,437 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] [2024-06-28 00:34:53,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 00:34:53,437 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:53,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:53,438 INFO L85 PathProgramCache]: Analyzing trace with hash 857080077, now seen corresponding path program 15 times [2024-06-28 00:34:53,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:53,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014188020] [2024-06-28 00:34:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:53,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:57,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:57,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014188020] [2024-06-28 00:34:57,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014188020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:57,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:57,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:34:57,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755538682] [2024-06-28 00:34:57,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:57,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:34:57,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:57,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:34:57,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:34:57,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:34:57,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 779 transitions, 14071 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:57,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:57,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:34:57,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:59,859 INFO L124 PetriNetUnfolderBase]: 3671/6006 cut-off events. [2024-06-28 00:34:59,859 INFO L125 PetriNetUnfolderBase]: For 562795/562803 co-relation queries the response was YES. [2024-06-28 00:34:59,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50555 conditions, 6006 events. 3671/6006 cut-off events. For 562795/562803 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38491 event pairs, 862 based on Foata normal form. 11/6016 useless extension candidates. Maximal degree in co-relation 50341. Up to 5191 conditions per place. [2024-06-28 00:34:59,960 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 556 selfloop transitions, 256 changer transitions 0/817 dead transitions. [2024-06-28 00:34:59,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 817 transitions, 16265 flow [2024-06-28 00:34:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:34:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:34:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-28 00:34:59,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 00:34:59,961 INFO L175 Difference]: Start difference. First operand has 513 places, 779 transitions, 14071 flow. Second operand 12 states and 207 transitions. [2024-06-28 00:34:59,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 817 transitions, 16265 flow [2024-06-28 00:35:03,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 817 transitions, 15804 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-28 00:35:03,482 INFO L231 Difference]: Finished difference. Result has 516 places, 783 transitions, 14241 flow [2024-06-28 00:35:03,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13613, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14241, PETRI_PLACES=516, PETRI_TRANSITIONS=783} [2024-06-28 00:35:03,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 473 predicate places. [2024-06-28 00:35:03,483 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 783 transitions, 14241 flow [2024-06-28 00:35:03,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:03,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:03,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:03,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 00:35:03,483 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:03,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash 69499095, now seen corresponding path program 22 times [2024-06-28 00:35:03,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:03,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083989017] [2024-06-28 00:35:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:03,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:08,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:08,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083989017] [2024-06-28 00:35:08,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083989017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:08,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:08,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:35:08,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33155904] [2024-06-28 00:35:08,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:08,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:35:08,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:08,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:35:08,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:35:08,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:35:08,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 783 transitions, 14241 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:08,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:08,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:35:08,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:11,304 INFO L124 PetriNetUnfolderBase]: 3700/6036 cut-off events. [2024-06-28 00:35:11,304 INFO L125 PetriNetUnfolderBase]: For 584223/584229 co-relation queries the response was YES. [2024-06-28 00:35:11,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51213 conditions, 6036 events. 3700/6036 cut-off events. For 584223/584229 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 38469 event pairs, 689 based on Foata normal form. 2/6037 useless extension candidates. Maximal degree in co-relation 50997. Up to 5290 conditions per place. [2024-06-28 00:35:11,394 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 625 selfloop transitions, 183 changer transitions 0/813 dead transitions. [2024-06-28 00:35:11,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 813 transitions, 16296 flow [2024-06-28 00:35:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:35:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:35:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-28 00:35:11,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-28 00:35:11,396 INFO L175 Difference]: Start difference. First operand has 516 places, 783 transitions, 14241 flow. Second operand 10 states and 157 transitions. [2024-06-28 00:35:11,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 813 transitions, 16296 flow [2024-06-28 00:35:14,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 813 transitions, 15790 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-28 00:35:14,649 INFO L231 Difference]: Finished difference. Result has 518 places, 795 transitions, 14391 flow [2024-06-28 00:35:14,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13735, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14391, PETRI_PLACES=518, PETRI_TRANSITIONS=795} [2024-06-28 00:35:14,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-28 00:35:14,649 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 795 transitions, 14391 flow [2024-06-28 00:35:14,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:14,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:14,649 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] [2024-06-28 00:35:14,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 00:35:14,650 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:14,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:14,650 INFO L85 PathProgramCache]: Analyzing trace with hash 69499467, now seen corresponding path program 16 times [2024-06-28 00:35:14,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:14,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134198867] [2024-06-28 00:35:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:14,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:19,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:19,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134198867] [2024-06-28 00:35:19,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134198867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:19,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:19,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:35:19,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224375044] [2024-06-28 00:35:19,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:19,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:35:19,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:19,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:35:19,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:35:19,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:35:19,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 795 transitions, 14391 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:19,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:19,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:35:19,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:22,445 INFO L124 PetriNetUnfolderBase]: 3694/6046 cut-off events. [2024-06-28 00:35:22,445 INFO L125 PetriNetUnfolderBase]: For 591824/591842 co-relation queries the response was YES. [2024-06-28 00:35:22,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51043 conditions, 6046 events. 3694/6046 cut-off events. For 591824/591842 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 38799 event pairs, 866 based on Foata normal form. 20/6065 useless extension candidates. Maximal degree in co-relation 50825. Up to 5498 conditions per place. [2024-06-28 00:35:22,532 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 725 selfloop transitions, 83 changer transitions 0/813 dead transitions. [2024-06-28 00:35:22,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 813 transitions, 16068 flow [2024-06-28 00:35:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:35:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:35:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-28 00:35:22,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-28 00:35:22,533 INFO L175 Difference]: Start difference. First operand has 518 places, 795 transitions, 14391 flow. Second operand 10 states and 152 transitions. [2024-06-28 00:35:22,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 813 transitions, 16068 flow [2024-06-28 00:35:26,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 813 transitions, 15748 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:26,420 INFO L231 Difference]: Finished difference. Result has 522 places, 795 transitions, 14245 flow [2024-06-28 00:35:26,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14071, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14245, PETRI_PLACES=522, PETRI_TRANSITIONS=795} [2024-06-28 00:35:26,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 479 predicate places. [2024-06-28 00:35:26,420 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 795 transitions, 14245 flow [2024-06-28 00:35:26,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:26,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:26,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:26,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 00:35:26,421 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:26,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:26,421 INFO L85 PathProgramCache]: Analyzing trace with hash 849312345, now seen corresponding path program 23 times [2024-06-28 00:35:26,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:26,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140387469] [2024-06-28 00:35:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:26,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:31,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:31,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140387469] [2024-06-28 00:35:31,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140387469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:31,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:31,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:35:31,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703681472] [2024-06-28 00:35:31,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:31,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:35:31,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:31,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:35:31,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:35:31,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:35:31,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 795 transitions, 14245 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:31,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:31,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:35:31,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:34,941 INFO L124 PetriNetUnfolderBase]: 3691/6020 cut-off events. [2024-06-28 00:35:34,941 INFO L125 PetriNetUnfolderBase]: For 591806/591812 co-relation queries the response was YES. [2024-06-28 00:35:35,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50702 conditions, 6020 events. 3691/6020 cut-off events. For 591806/591812 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38349 event pairs, 689 based on Foata normal form. 2/6021 useless extension candidates. Maximal degree in co-relation 50484. Up to 5279 conditions per place. [2024-06-28 00:35:35,025 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 627 selfloop transitions, 184 changer transitions 0/816 dead transitions. [2024-06-28 00:35:35,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 816 transitions, 16307 flow [2024-06-28 00:35:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:35:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:35:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-28 00:35:35,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-28 00:35:35,026 INFO L175 Difference]: Start difference. First operand has 522 places, 795 transitions, 14245 flow. Second operand 11 states and 177 transitions. [2024-06-28 00:35:35,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 816 transitions, 16307 flow [2024-06-28 00:35:38,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 816 transitions, 16139 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 00:35:38,437 INFO L231 Difference]: Finished difference. Result has 526 places, 795 transitions, 14451 flow [2024-06-28 00:35:38,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14077, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14451, PETRI_PLACES=526, PETRI_TRANSITIONS=795} [2024-06-28 00:35:38,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-28 00:35:38,438 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 795 transitions, 14451 flow [2024-06-28 00:35:38,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:38,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:38,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:38,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 00:35:38,438 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:38,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:38,439 INFO L85 PathProgramCache]: Analyzing trace with hash 849312717, now seen corresponding path program 17 times [2024-06-28 00:35:38,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:38,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515445101] [2024-06-28 00:35:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:38,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:44,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:44,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515445101] [2024-06-28 00:35:44,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515445101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:44,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:44,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:35:44,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036299685] [2024-06-28 00:35:44,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:44,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:35:44,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:44,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:35:44,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:35:44,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:35:44,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 795 transitions, 14451 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:44,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:44,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:35:44,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:47,659 INFO L124 PetriNetUnfolderBase]: 3685/6032 cut-off events. [2024-06-28 00:35:47,660 INFO L125 PetriNetUnfolderBase]: For 599595/599613 co-relation queries the response was YES. [2024-06-28 00:35:47,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50826 conditions, 6032 events. 3685/6032 cut-off events. For 599595/599613 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 38683 event pairs, 866 based on Foata normal form. 20/6051 useless extension candidates. Maximal degree in co-relation 50607. Up to 5466 conditions per place. [2024-06-28 00:35:47,763 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 715 selfloop transitions, 99 changer transitions 0/819 dead transitions. [2024-06-28 00:35:47,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 819 transitions, 16190 flow [2024-06-28 00:35:47,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:35:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:35:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 203 transitions. [2024-06-28 00:35:47,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-28 00:35:47,764 INFO L175 Difference]: Start difference. First operand has 526 places, 795 transitions, 14451 flow. Second operand 14 states and 203 transitions. [2024-06-28 00:35:47,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 819 transitions, 16190 flow [2024-06-28 00:35:51,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 819 transitions, 15863 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:51,509 INFO L231 Difference]: Finished difference. Result has 534 places, 795 transitions, 14330 flow [2024-06-28 00:35:51,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14124, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14330, PETRI_PLACES=534, PETRI_TRANSITIONS=795} [2024-06-28 00:35:51,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-28 00:35:51,509 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 795 transitions, 14330 flow [2024-06-28 00:35:51,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:51,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:51,510 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] [2024-06-28 00:35:51,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 00:35:51,510 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:51,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash 849306765, now seen corresponding path program 24 times [2024-06-28 00:35:51,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:51,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580663611] [2024-06-28 00:35:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:51,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:56,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:56,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580663611] [2024-06-28 00:35:56,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580663611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:56,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:56,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:35:56,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167418486] [2024-06-28 00:35:56,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:56,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:35:56,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:35:56,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:35:56,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:35:56,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 795 transitions, 14330 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:56,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:56,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:35:56,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:00,753 INFO L124 PetriNetUnfolderBase]: 3682/6012 cut-off events. [2024-06-28 00:36:00,753 INFO L125 PetriNetUnfolderBase]: For 599542/599548 co-relation queries the response was YES. [2024-06-28 00:36:00,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50540 conditions, 6012 events. 3682/6012 cut-off events. For 599542/599548 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 38313 event pairs, 687 based on Foata normal form. 2/6013 useless extension candidates. Maximal degree in co-relation 50320. Up to 5268 conditions per place. [2024-06-28 00:36:00,858 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 627 selfloop transitions, 186 changer transitions 0/818 dead transitions. [2024-06-28 00:36:00,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 818 transitions, 16208 flow [2024-06-28 00:36:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 00:36:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 00:36:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 217 transitions. [2024-06-28 00:36:00,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34444444444444444 [2024-06-28 00:36:00,859 INFO L175 Difference]: Start difference. First operand has 534 places, 795 transitions, 14330 flow. Second operand 15 states and 217 transitions. [2024-06-28 00:36:00,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 818 transitions, 16208 flow [2024-06-28 00:36:05,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 818 transitions, 15962 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-28 00:36:05,166 INFO L231 Difference]: Finished difference. Result has 536 places, 795 transitions, 14462 flow [2024-06-28 00:36:05,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14084, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14462, PETRI_PLACES=536, PETRI_TRANSITIONS=795} [2024-06-28 00:36:05,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 493 predicate places. [2024-06-28 00:36:05,167 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 795 transitions, 14462 flow [2024-06-28 00:36:05,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:05,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:05,167 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] [2024-06-28 00:36:05,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 00:36:05,167 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:05,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:05,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1352392005, now seen corresponding path program 18 times [2024-06-28 00:36:05,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:05,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317782787] [2024-06-28 00:36:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:05,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:09,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:09,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317782787] [2024-06-28 00:36:09,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317782787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:09,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:09,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:36:09,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788170196] [2024-06-28 00:36:09,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:09,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:36:09,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:09,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:36:09,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:36:09,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:36:09,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 795 transitions, 14462 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:09,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:09,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:36:09,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:11,826 INFO L124 PetriNetUnfolderBase]: 3740/6110 cut-off events. [2024-06-28 00:36:11,826 INFO L125 PetriNetUnfolderBase]: For 650449/650471 co-relation queries the response was YES. [2024-06-28 00:36:11,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52162 conditions, 6110 events. 3740/6110 cut-off events. For 650449/650471 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 39179 event pairs, 869 based on Foata normal form. 19/6128 useless extension candidates. Maximal degree in co-relation 51941. Up to 5124 conditions per place. [2024-06-28 00:36:11,926 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 523 selfloop transitions, 309 changer transitions 0/837 dead transitions. [2024-06-28 00:36:11,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 837 transitions, 17047 flow [2024-06-28 00:36:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:36:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:36:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 211 transitions. [2024-06-28 00:36:11,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38644688644688646 [2024-06-28 00:36:11,927 INFO L175 Difference]: Start difference. First operand has 536 places, 795 transitions, 14462 flow. Second operand 13 states and 211 transitions. [2024-06-28 00:36:11,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 837 transitions, 17047 flow [2024-06-28 00:36:15,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 837 transitions, 16667 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-28 00:36:15,645 INFO L231 Difference]: Finished difference. Result has 535 places, 807 transitions, 14888 flow [2024-06-28 00:36:15,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14082, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14888, PETRI_PLACES=535, PETRI_TRANSITIONS=807} [2024-06-28 00:36:15,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 492 predicate places. [2024-06-28 00:36:15,646 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 807 transitions, 14888 flow [2024-06-28 00:36:15,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:15,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:15,646 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] [2024-06-28 00:36:15,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 00:36:15,646 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:15,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:15,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1571316405, now seen corresponding path program 19 times [2024-06-28 00:36:15,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:15,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125564417] [2024-06-28 00:36:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:15,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:21,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:21,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125564417] [2024-06-28 00:36:21,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125564417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:21,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:21,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:36:21,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750910734] [2024-06-28 00:36:21,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:21,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:36:21,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:21,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:36:21,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:36:21,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:36:21,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 807 transitions, 14888 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:21,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:21,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:36:21,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:25,229 INFO L124 PetriNetUnfolderBase]: 3755/6133 cut-off events. [2024-06-28 00:36:25,229 INFO L125 PetriNetUnfolderBase]: For 666257/666320 co-relation queries the response was YES. [2024-06-28 00:36:25,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52796 conditions, 6133 events. 3755/6133 cut-off events. For 666257/666320 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39374 event pairs, 880 based on Foata normal form. 47/6179 useless extension candidates. Maximal degree in co-relation 52575. Up to 5462 conditions per place. [2024-06-28 00:36:25,333 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 693 selfloop transitions, 146 changer transitions 0/844 dead transitions. [2024-06-28 00:36:25,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 844 transitions, 17513 flow [2024-06-28 00:36:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:36:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:36:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 211 transitions. [2024-06-28 00:36:25,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358843537414966 [2024-06-28 00:36:25,334 INFO L175 Difference]: Start difference. First operand has 535 places, 807 transitions, 14888 flow. Second operand 14 states and 211 transitions. [2024-06-28 00:36:25,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 844 transitions, 17513 flow Killed by 15