./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe018_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/safe018_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe018_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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:04:11,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:04:11,113 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:04:11,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:04:11,117 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:04:11,130 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:04:11,130 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:04:11,131 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:04:11,131 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:04:11,131 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:04:11,132 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:04:11,132 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:04:11,132 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:04:11,133 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:04:11,133 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:04:11,133 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:04:11,134 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:04:11,134 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:04:11,134 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:04:11,134 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:04:11,135 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:04:11,152 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:04:11,152 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:04:11,153 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:04:11,153 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:04:11,153 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:04:11,153 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:04:11,153 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:04:11,154 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:04:11,154 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:04:11,155 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:04:11,155 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:04:11,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:04:11,155 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:04:11,155 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:04:11,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:04:11,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:04:11,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:04:11,156 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:04:11,157 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:04:11,157 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:04:11,157 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:04:11,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:04:11,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 02:04:11,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:04:11,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:04:11,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:04:11,406 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:04:11,406 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:04:11,407 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.oepc.i [2024-06-28 02:04:12,425 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:04:12,616 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:04:12,616 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_rmo.oepc.i [2024-06-28 02:04:12,627 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4db87fc79/36a7280206b142698e41b19a53b238ca/FLAG3252cf498 [2024-06-28 02:04:12,637 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4db87fc79/36a7280206b142698e41b19a53b238ca [2024-06-28 02:04:12,639 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:04:12,642 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:04:12,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe018_rmo.oepc.yml/witness.yml [2024-06-28 02:04:12,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:04:12,867 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:04:12,868 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:04:12,868 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:04:12,893 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:04:12,894 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:04:12" (1/2) ... [2024-06-28 02:04:12,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf8a104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:04:12, skipping insertion in model container [2024-06-28 02:04:12,895 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:04:12" (1/2) ... [2024-06-28 02:04:12,896 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@772dfc52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:04:12, skipping insertion in model container [2024-06-28 02:04:12,897 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:04:12" (2/2) ... [2024-06-28 02:04:12,897 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf8a104 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:12, skipping insertion in model container [2024-06-28 02:04:12,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:04:12" (2/2) ... [2024-06-28 02:04:12,897 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:04:12,989 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:04:12,990 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 02:04:12,991 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 02:04:12,991 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 02:04:12,991 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:04:12,992 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-28 02:04:13,030 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:04:13,207 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_rmo.oepc.i[993,1006] [2024-06-28 02:04:13,295 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:04:13,302 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 02:04:13,335 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_rmo.oepc.i[993,1006] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:04:13,453 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:04:13,479 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:04:13,480 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13 WrapperNode [2024-06-28 02:04:13,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:04:13,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:04:13,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:04:13,481 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:04:13,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,510 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,540 INFO L138 Inliner]: procedures = 175, calls = 77, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 206 [2024-06-28 02:04:13,541 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:04:13,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:04:13,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:04:13,542 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:04:13,550 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,554 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,575 INFO L175 MemorySlicer]: Split 39 memory accesses to 2 slices as follows [2, 37]. 95 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 02:04:13,576 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,576 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,594 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,596 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,598 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,599 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,602 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:04:13,603 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:04:13,603 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:04:13,603 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:04:13,620 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (1/1) ... [2024-06-28 02:04:13,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:04:13,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:04:13,663 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 02:04:13,698 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 02:04:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 02:04:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 02:04:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 02:04:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 02:04:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:04:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:04:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:04:13,722 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:04:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:04:13,722 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:04:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:04:13,722 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:04:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:04:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 02:04:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:04:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:04:13,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:04:13,724 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 02:04:13,849 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:04:13,851 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:04:14,258 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:04:14,259 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:04:14,531 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:04:14,531 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:04:14,532 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:04:14 BoogieIcfgContainer [2024-06-28 02:04:14,532 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:04:14,535 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:04:14,536 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:04:14,538 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:04:14,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:04:12" (1/4) ... [2024-06-28 02:04:14,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530d877b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:04:14, skipping insertion in model container [2024-06-28 02:04:14,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:04:12" (2/4) ... [2024-06-28 02:04:14,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530d877b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:04:14, skipping insertion in model container [2024-06-28 02:04:14,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:04:13" (3/4) ... [2024-06-28 02:04:14,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530d877b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:04:14, skipping insertion in model container [2024-06-28 02:04:14,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:04:14" (4/4) ... [2024-06-28 02:04:14,541 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_rmo.oepc.i [2024-06-28 02:04:14,555 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:04:14,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 02:04:14,555 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:04:14,647 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:04:14,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-28 02:04:14,739 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-28 02:04:14,739 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:04:14,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-28 02:04:14,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-28 02:04:14,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-28 02:04:14,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:04:14,763 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;@5bb4f373, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:04:14,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 02:04:14,767 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:04:14,768 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 02:04:14,768 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:04:14,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:14,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:04:14,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:14,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:14,775 INFO L85 PathProgramCache]: Analyzing trace with hash 626232666, now seen corresponding path program 1 times [2024-06-28 02:04:14,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:14,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473031914] [2024-06-28 02:04:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:14,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:16,318 INFO 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 02:04:16,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:16,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473031914] [2024-06-28 02:04:16,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473031914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:16,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:16,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:04:16,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162174918] [2024-06-28 02:04:16,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:16,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:04:16,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:16,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:04:16,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:04:16,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:04:16,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:16,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:16,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:04:16,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:16,900 INFO L124 PetriNetUnfolderBase]: 1706/2758 cut-off events. [2024-06-28 02:04:16,901 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-28 02:04:16,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5329 conditions, 2758 events. 1706/2758 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15472 event pairs, 1011 based on Foata normal form. 0/2654 useless extension candidates. Maximal degree in co-relation 5317. Up to 2510 conditions per place. [2024-06-28 02:04:16,918 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-28 02:04:16,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 223 flow [2024-06-28 02:04:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:04:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:04:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-28 02:04:16,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 02:04:16,929 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 92 transitions. [2024-06-28 02:04:16,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 223 flow [2024-06-28 02:04:16,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 218 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:04:16,936 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 123 flow [2024-06-28 02:04:16,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-28 02:04:16,941 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-28 02:04:16,941 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 123 flow [2024-06-28 02:04:16,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:16,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:16,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:16,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:04:16,942 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:16,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:16,943 INFO L85 PathProgramCache]: Analyzing trace with hash 514213017, now seen corresponding path program 1 times [2024-06-28 02:04:16,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:16,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006952515] [2024-06-28 02:04:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:16,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:18,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:18,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006952515] [2024-06-28 02:04:18,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006952515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:18,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:18,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:04:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425680311] [2024-06-28 02:04:18,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:18,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:04:18,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:04:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:04:18,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:04:18,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:18,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:18,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:04:18,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:19,445 INFO L124 PetriNetUnfolderBase]: 1700/2638 cut-off events. [2024-06-28 02:04:19,445 INFO L125 PetriNetUnfolderBase]: For 498/506 co-relation queries the response was YES. [2024-06-28 02:04:19,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5945 conditions, 2638 events. 1700/2638 cut-off events. For 498/506 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14266 event pairs, 665 based on Foata normal form. 6/2641 useless extension candidates. Maximal degree in co-relation 5933. Up to 2468 conditions per place. [2024-06-28 02:04:19,459 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 59 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-28 02:04:19,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 351 flow [2024-06-28 02:04:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:04:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:04:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-28 02:04:19,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793478260869565 [2024-06-28 02:04:19,461 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 123 flow. Second operand 4 states and 125 transitions. [2024-06-28 02:04:19,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 351 flow [2024-06-28 02:04:19,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 79 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:04:19,463 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 186 flow [2024-06-28 02:04:19,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-28 02:04:19,464 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-06-28 02:04:19,464 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 186 flow [2024-06-28 02:04:19,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:19,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:19,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:19,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:04:19,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:19,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1226977071, now seen corresponding path program 1 times [2024-06-28 02:04:19,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:19,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261356315] [2024-06-28 02:04:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:19,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:21,784 INFO 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 02:04:21,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:21,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261356315] [2024-06-28 02:04:21,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261356315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:21,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:21,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:04:21,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441687121] [2024-06-28 02:04:21,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:21,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:04:21,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:04:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:04:21,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-06-28 02:04:21,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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 02:04:21,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:21,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-06-28 02:04:21,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:22,873 INFO L124 PetriNetUnfolderBase]: 2164/3296 cut-off events. [2024-06-28 02:04:22,873 INFO L125 PetriNetUnfolderBase]: For 1910/1934 co-relation queries the response was YES. [2024-06-28 02:04:22,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8379 conditions, 3296 events. 2164/3296 cut-off events. For 1910/1934 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17608 event pairs, 489 based on Foata normal form. 15/3309 useless extension candidates. Maximal degree in co-relation 8364. Up to 3035 conditions per place. [2024-06-28 02:04:22,889 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 86 selfloop transitions, 15 changer transitions 0/110 dead transitions. [2024-06-28 02:04:22,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 110 transitions, 542 flow [2024-06-28 02:04:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:04:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:04:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 02:04:22,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-28 02:04:22,895 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 186 flow. Second operand 6 states and 179 transitions. [2024-06-28 02:04:22,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 110 transitions, 542 flow [2024-06-28 02:04:22,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 110 transitions, 542 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 02:04:22,902 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 256 flow [2024-06-28 02:04:22,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-28 02:04:22,903 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-06-28 02:04:22,903 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 256 flow [2024-06-28 02:04:22,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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 02:04:22,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:22,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:22,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:04:22,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:22,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1408799072, now seen corresponding path program 1 times [2024-06-28 02:04:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:22,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677451812] [2024-06-28 02:04:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:22,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:24,261 INFO 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 02:04:24,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677451812] [2024-06-28 02:04:24,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677451812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:24,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:24,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:04:24,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140976495] [2024-06-28 02:04:24,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:24,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:04:24,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:24,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:04:24,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:04:24,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:04:24,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:24,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:24,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:04:24,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:25,310 INFO L124 PetriNetUnfolderBase]: 2584/4076 cut-off events. [2024-06-28 02:04:25,311 INFO L125 PetriNetUnfolderBase]: For 3856/3856 co-relation queries the response was YES. [2024-06-28 02:04:25,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10995 conditions, 4076 events. 2584/4076 cut-off events. For 3856/3856 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22946 event pairs, 1004 based on Foata normal form. 2/4077 useless extension candidates. Maximal degree in co-relation 10975. Up to 3735 conditions per place. [2024-06-28 02:04:25,334 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 67 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-28 02:04:25,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 84 transitions, 500 flow [2024-06-28 02:04:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:04:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:04:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-28 02:04:25,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2024-06-28 02:04:25,336 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 256 flow. Second operand 5 states and 119 transitions. [2024-06-28 02:04:25,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 84 transitions, 500 flow [2024-06-28 02:04:25,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 467 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 02:04:25,342 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 311 flow [2024-06-28 02:04:25,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-28 02:04:25,343 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-06-28 02:04:25,343 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 311 flow [2024-06-28 02:04:25,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:25,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:25,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:25,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:04:25,344 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:25,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:25,345 INFO L85 PathProgramCache]: Analyzing trace with hash 935544223, now seen corresponding path program 1 times [2024-06-28 02:04:25,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:25,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981347494] [2024-06-28 02:04:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:25,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:27,761 INFO 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 02:04:27,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:27,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981347494] [2024-06-28 02:04:27,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981347494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:27,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:27,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:04:27,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864494265] [2024-06-28 02:04:27,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:27,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:04:27,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:27,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:04:27,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:04:27,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:04:27,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 311 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:27,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:27,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:04:27,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:28,972 INFO L124 PetriNetUnfolderBase]: 2615/3933 cut-off events. [2024-06-28 02:04:28,973 INFO L125 PetriNetUnfolderBase]: For 4950/4950 co-relation queries the response was YES. [2024-06-28 02:04:28,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11729 conditions, 3933 events. 2615/3933 cut-off events. For 4950/4950 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21123 event pairs, 762 based on Foata normal form. 2/3933 useless extension candidates. Maximal degree in co-relation 11706. Up to 3693 conditions per place. [2024-06-28 02:04:29,003 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 91 selfloop transitions, 19 changer transitions 0/117 dead transitions. [2024-06-28 02:04:29,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 117 transitions, 718 flow [2024-06-28 02:04:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:04:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:04:29,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-28 02:04:29,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579710144927537 [2024-06-28 02:04:29,007 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 311 flow. Second operand 6 states and 154 transitions. [2024-06-28 02:04:29,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 117 transitions, 718 flow [2024-06-28 02:04:29,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 117 transitions, 710 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 02:04:29,018 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 444 flow [2024-06-28 02:04:29,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=444, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-28 02:04:29,021 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2024-06-28 02:04:29,021 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 444 flow [2024-06-28 02:04:29,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:29,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:29,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:29,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:04:29,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:29,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:29,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1371142273, now seen corresponding path program 2 times [2024-06-28 02:04:29,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:29,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830944488] [2024-06-28 02:04:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:29,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:31,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:31,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830944488] [2024-06-28 02:04:31,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830944488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:31,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:31,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:04:31,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830858443] [2024-06-28 02:04:31,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:31,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:04:31,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:31,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:04:31,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:04:31,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:04:31,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 444 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:31,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:31,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:04:31,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:32,458 INFO L124 PetriNetUnfolderBase]: 2610/3936 cut-off events. [2024-06-28 02:04:32,458 INFO L125 PetriNetUnfolderBase]: For 7527/7533 co-relation queries the response was YES. [2024-06-28 02:04:32,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12953 conditions, 3936 events. 2610/3936 cut-off events. For 7527/7533 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21174 event pairs, 754 based on Foata normal form. 8/3943 useless extension candidates. Maximal degree in co-relation 12925. Up to 3688 conditions per place. [2024-06-28 02:04:32,475 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 86 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-06-28 02:04:32,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 116 transitions, 801 flow [2024-06-28 02:04:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-28 02:04:32,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 02:04:32,477 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 444 flow. Second operand 7 states and 161 transitions. [2024-06-28 02:04:32,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 116 transitions, 801 flow [2024-06-28 02:04:32,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 116 transitions, 789 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-28 02:04:32,489 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 533 flow [2024-06-28 02:04:32,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=533, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-28 02:04:32,491 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2024-06-28 02:04:32,491 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 533 flow [2024-06-28 02:04:32,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:32,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:32,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:32,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:04:32,492 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:32,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1356850529, now seen corresponding path program 1 times [2024-06-28 02:04:32,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:32,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986951678] [2024-06-28 02:04:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:32,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:34,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:34,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986951678] [2024-06-28 02:04:34,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986951678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:34,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:34,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:04:34,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270574780] [2024-06-28 02:04:34,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:34,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:04:34,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:04:34,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:04:34,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:04:34,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 533 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:34,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:34,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:04:34,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:35,166 INFO L124 PetriNetUnfolderBase]: 2602/4102 cut-off events. [2024-06-28 02:04:35,167 INFO L125 PetriNetUnfolderBase]: For 8144/8144 co-relation queries the response was YES. [2024-06-28 02:04:35,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13263 conditions, 4102 events. 2602/4102 cut-off events. For 8144/8144 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23095 event pairs, 882 based on Foata normal form. 4/4105 useless extension candidates. Maximal degree in co-relation 13230. Up to 3721 conditions per place. [2024-06-28 02:04:35,190 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 94 selfloop transitions, 13 changer transitions 0/114 dead transitions. [2024-06-28 02:04:35,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 114 transitions, 843 flow [2024-06-28 02:04:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:04:35,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:04:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 02:04:35,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181159420289855 [2024-06-28 02:04:35,192 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 533 flow. Second operand 6 states and 143 transitions. [2024-06-28 02:04:35,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 114 transitions, 843 flow [2024-06-28 02:04:35,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 821 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 02:04:35,201 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 571 flow [2024-06-28 02:04:35,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=571, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2024-06-28 02:04:35,203 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2024-06-28 02:04:35,203 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 571 flow [2024-06-28 02:04:35,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:35,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:35,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:35,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:04:35,204 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:35,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1947571802, now seen corresponding path program 1 times [2024-06-28 02:04:35,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:35,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691383882] [2024-06-28 02:04:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:35,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:37,847 INFO 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 02:04:37,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:37,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691383882] [2024-06-28 02:04:37,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691383882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:37,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:37,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:37,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137429876] [2024-06-28 02:04:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:37,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:37,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:37,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:04:37,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 571 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:37,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:37,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:04:37,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:39,132 INFO L124 PetriNetUnfolderBase]: 2656/4034 cut-off events. [2024-06-28 02:04:39,133 INFO L125 PetriNetUnfolderBase]: For 10405/10405 co-relation queries the response was YES. [2024-06-28 02:04:39,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13910 conditions, 4034 events. 2656/4034 cut-off events. For 10405/10405 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 22321 event pairs, 634 based on Foata normal form. 3/4036 useless extension candidates. Maximal degree in co-relation 13875. Up to 3689 conditions per place. [2024-06-28 02:04:39,155 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 109 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-06-28 02:04:39,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 141 transitions, 1015 flow [2024-06-28 02:04:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-28 02:04:39,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683229813664596 [2024-06-28 02:04:39,157 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 571 flow. Second operand 7 states and 183 transitions. [2024-06-28 02:04:39,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 141 transitions, 1015 flow [2024-06-28 02:04:39,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 141 transitions, 979 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 02:04:39,169 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 626 flow [2024-06-28 02:04:39,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=626, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-06-28 02:04:39,170 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2024-06-28 02:04:39,170 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 626 flow [2024-06-28 02:04:39,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:39,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:39,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:39,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:04:39,171 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:39,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:39,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1947451832, now seen corresponding path program 2 times [2024-06-28 02:04:39,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:39,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700592268] [2024-06-28 02:04:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:39,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:41,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:41,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700592268] [2024-06-28 02:04:41,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700592268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:41,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:41,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:41,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130258041] [2024-06-28 02:04:41,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:41,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:41,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:41,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:41,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:41,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:04:41,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 626 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:41,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:41,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:04:41,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:43,285 INFO L124 PetriNetUnfolderBase]: 2687/4063 cut-off events. [2024-06-28 02:04:43,285 INFO L125 PetriNetUnfolderBase]: For 12344/12344 co-relation queries the response was YES. [2024-06-28 02:04:43,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15021 conditions, 4063 events. 2687/4063 cut-off events. For 12344/12344 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 22072 event pairs, 694 based on Foata normal form. 2/4063 useless extension candidates. Maximal degree in co-relation 14985. Up to 3691 conditions per place. [2024-06-28 02:04:43,337 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 112 selfloop transitions, 30 changer transitions 0/149 dead transitions. [2024-06-28 02:04:43,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 149 transitions, 1163 flow [2024-06-28 02:04:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-28 02:04:43,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562111801242236 [2024-06-28 02:04:43,354 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 626 flow. Second operand 7 states and 181 transitions. [2024-06-28 02:04:43,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 149 transitions, 1163 flow [2024-06-28 02:04:43,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 149 transitions, 1099 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 02:04:43,366 INFO L231 Difference]: Finished difference. Result has 89 places, 96 transitions, 744 flow [2024-06-28 02:04:43,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=89, PETRI_TRANSITIONS=96} [2024-06-28 02:04:43,367 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 39 predicate places. [2024-06-28 02:04:43,367 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 744 flow [2024-06-28 02:04:43,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:43,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:43,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:43,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:04:43,368 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:43,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -444260930, now seen corresponding path program 3 times [2024-06-28 02:04:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:43,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977674980] [2024-06-28 02:04:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:45,720 INFO 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 02:04:45,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:45,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977674980] [2024-06-28 02:04:45,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977674980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:45,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:45,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:45,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105837168] [2024-06-28 02:04:45,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:45,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:45,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:45,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:45,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:45,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:04:45,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 96 transitions, 744 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:45,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:45,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:04:45,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:47,214 INFO L124 PetriNetUnfolderBase]: 2682/4058 cut-off events. [2024-06-28 02:04:47,215 INFO L125 PetriNetUnfolderBase]: For 15447/15451 co-relation queries the response was YES. [2024-06-28 02:04:47,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15900 conditions, 4058 events. 2682/4058 cut-off events. For 15447/15451 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 22023 event pairs, 708 based on Foata normal form. 3/4060 useless extension candidates. Maximal degree in co-relation 15861. Up to 3686 conditions per place. [2024-06-28 02:04:47,239 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 107 selfloop transitions, 31 changer transitions 0/145 dead transitions. [2024-06-28 02:04:47,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 145 transitions, 1163 flow [2024-06-28 02:04:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:04:47,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-28 02:04:47,241 INFO L175 Difference]: Start difference. First operand has 89 places, 96 transitions, 744 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:04:47,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 145 transitions, 1163 flow [2024-06-28 02:04:47,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 145 transitions, 1130 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 02:04:47,253 INFO L231 Difference]: Finished difference. Result has 94 places, 97 transitions, 792 flow [2024-06-28 02:04:47,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=792, PETRI_PLACES=94, PETRI_TRANSITIONS=97} [2024-06-28 02:04:47,253 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 44 predicate places. [2024-06-28 02:04:47,254 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 97 transitions, 792 flow [2024-06-28 02:04:47,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:47,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:47,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:47,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:04:47,254 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:47,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:47,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1758960898, now seen corresponding path program 1 times [2024-06-28 02:04:47,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:47,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478495997] [2024-06-28 02:04:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:47,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:49,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:49,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478495997] [2024-06-28 02:04:49,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478495997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:49,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:49,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:49,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62233371] [2024-06-28 02:04:49,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:49,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:49,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:49,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:49,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:49,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:04:49,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 97 transitions, 792 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:49,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:49,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:04:49,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:50,632 INFO L124 PetriNetUnfolderBase]: 2850/4316 cut-off events. [2024-06-28 02:04:50,632 INFO L125 PetriNetUnfolderBase]: For 18173/18173 co-relation queries the response was YES. [2024-06-28 02:04:50,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17549 conditions, 4316 events. 2850/4316 cut-off events. For 18173/18173 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23509 event pairs, 692 based on Foata normal form. 4/4318 useless extension candidates. Maximal degree in co-relation 17508. Up to 3924 conditions per place. [2024-06-28 02:04:50,689 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 130 selfloop transitions, 38 changer transitions 0/175 dead transitions. [2024-06-28 02:04:50,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 175 transitions, 1463 flow [2024-06-28 02:04:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:04:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:04:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-28 02:04:50,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570652173913043 [2024-06-28 02:04:50,692 INFO L175 Difference]: Start difference. First operand has 94 places, 97 transitions, 792 flow. Second operand 8 states and 205 transitions. [2024-06-28 02:04:50,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 175 transitions, 1463 flow [2024-06-28 02:04:50,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 175 transitions, 1394 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 02:04:50,710 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 1019 flow [2024-06-28 02:04:50,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1019, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2024-06-28 02:04:50,711 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2024-06-28 02:04:50,711 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 1019 flow [2024-06-28 02:04:50,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:50,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:50,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:50,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:04:50,712 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:50,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1409889566, now seen corresponding path program 2 times [2024-06-28 02:04:50,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:50,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29749800] [2024-06-28 02:04:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:50,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:53,006 INFO 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 02:04:53,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:53,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29749800] [2024-06-28 02:04:53,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29749800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:53,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:53,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:53,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6922818] [2024-06-28 02:04:53,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:53,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:53,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:53,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:53,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:53,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:04:53,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 1019 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:53,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:53,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:04:53,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:54,185 INFO L124 PetriNetUnfolderBase]: 2900/4390 cut-off events. [2024-06-28 02:04:54,185 INFO L125 PetriNetUnfolderBase]: For 21377/21377 co-relation queries the response was YES. [2024-06-28 02:04:54,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18641 conditions, 4390 events. 2900/4390 cut-off events. For 21377/21377 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23974 event pairs, 680 based on Foata normal form. 4/4392 useless extension candidates. Maximal degree in co-relation 18596. Up to 3942 conditions per place. [2024-06-28 02:04:54,216 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 123 selfloop transitions, 38 changer transitions 0/168 dead transitions. [2024-06-28 02:04:54,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 168 transitions, 1519 flow [2024-06-28 02:04:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:04:54,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-06-28 02:04:54,218 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 1019 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:04:54,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 168 transitions, 1519 flow [2024-06-28 02:04:54,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 168 transitions, 1468 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 02:04:54,241 INFO L231 Difference]: Finished difference. Result has 104 places, 116 transitions, 1079 flow [2024-06-28 02:04:54,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1079, PETRI_PLACES=104, PETRI_TRANSITIONS=116} [2024-06-28 02:04:54,242 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2024-06-28 02:04:54,242 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 116 transitions, 1079 flow [2024-06-28 02:04:54,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:54,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:54,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:54,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:04:54,243 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:54,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash -408832032, now seen corresponding path program 3 times [2024-06-28 02:04:54,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:54,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015927387] [2024-06-28 02:04:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:54,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:56,454 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 02:04:56,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:56,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015927387] [2024-06-28 02:04:56,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015927387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:56,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:56,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:56,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664101196] [2024-06-28 02:04:56,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:56,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:56,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:56,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:56,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:04:56,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 116 transitions, 1079 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:56,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:56,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:04:56,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:57,803 INFO L124 PetriNetUnfolderBase]: 2950/4478 cut-off events. [2024-06-28 02:04:57,803 INFO L125 PetriNetUnfolderBase]: For 25530/25536 co-relation queries the response was YES. [2024-06-28 02:04:57,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19522 conditions, 4478 events. 2950/4478 cut-off events. For 25530/25536 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 24557 event pairs, 701 based on Foata normal form. 10/4487 useless extension candidates. Maximal degree in co-relation 19476. Up to 4062 conditions per place. [2024-06-28 02:04:57,828 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 126 selfloop transitions, 36 changer transitions 0/169 dead transitions. [2024-06-28 02:04:57,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 169 transitions, 1593 flow [2024-06-28 02:04:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:04:57,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372670807453416 [2024-06-28 02:04:57,830 INFO L175 Difference]: Start difference. First operand has 104 places, 116 transitions, 1079 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:04:57,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 169 transitions, 1593 flow [2024-06-28 02:04:57,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 169 transitions, 1502 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 02:04:57,855 INFO L231 Difference]: Finished difference. Result has 106 places, 118 transitions, 1096 flow [2024-06-28 02:04:57,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1096, PETRI_PLACES=106, PETRI_TRANSITIONS=118} [2024-06-28 02:04:57,855 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 56 predicate places. [2024-06-28 02:04:57,855 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 118 transitions, 1096 flow [2024-06-28 02:04:57,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:57,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:57,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:57,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:04:57,856 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:57,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash -97357318, now seen corresponding path program 4 times [2024-06-28 02:04:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:57,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213547208] [2024-06-28 02:04:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:57,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:59,822 INFO 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 02:04:59,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:59,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213547208] [2024-06-28 02:04:59,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213547208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:59,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:59,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:59,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906585708] [2024-06-28 02:04:59,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:59,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:59,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:59,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:59,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:04:59,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 118 transitions, 1096 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:59,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:59,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:04:59,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:01,025 INFO L124 PetriNetUnfolderBase]: 2942/4466 cut-off events. [2024-06-28 02:05:01,025 INFO L125 PetriNetUnfolderBase]: For 24951/24957 co-relation queries the response was YES. [2024-06-28 02:05:01,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19317 conditions, 4466 events. 2942/4466 cut-off events. For 24951/24957 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 24426 event pairs, 597 based on Foata normal form. 10/4475 useless extension candidates. Maximal degree in co-relation 19270. Up to 3844 conditions per place. [2024-06-28 02:05:01,054 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 122 selfloop transitions, 44 changer transitions 0/173 dead transitions. [2024-06-28 02:05:01,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 173 transitions, 1638 flow [2024-06-28 02:05:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:05:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:05:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:05:01,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2024-06-28 02:05:01,063 INFO L175 Difference]: Start difference. First operand has 106 places, 118 transitions, 1096 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:05:01,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 173 transitions, 1638 flow [2024-06-28 02:05:01,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 173 transitions, 1556 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:01,090 INFO L231 Difference]: Finished difference. Result has 109 places, 122 transitions, 1183 flow [2024-06-28 02:05:01,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1183, PETRI_PLACES=109, PETRI_TRANSITIONS=122} [2024-06-28 02:05:01,090 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 59 predicate places. [2024-06-28 02:05:01,091 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 122 transitions, 1183 flow [2024-06-28 02:05:01,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:01,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:01,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:01,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:05:01,091 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:01,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:01,092 INFO L85 PathProgramCache]: Analyzing trace with hash 2037950779, now seen corresponding path program 1 times [2024-06-28 02:05:01,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:01,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238714217] [2024-06-28 02:05:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:01,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:03,740 INFO 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 02:05:03,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:03,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238714217] [2024-06-28 02:05:03,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238714217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:03,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:03,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:03,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048909500] [2024-06-28 02:05:03,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:03,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:03,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:03,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:05:03,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 122 transitions, 1183 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:03,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:03,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:05:03,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:05,437 INFO L124 PetriNetUnfolderBase]: 3562/5426 cut-off events. [2024-06-28 02:05:05,437 INFO L125 PetriNetUnfolderBase]: For 36346/36346 co-relation queries the response was YES. [2024-06-28 02:05:05,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24334 conditions, 5426 events. 3562/5426 cut-off events. For 36346/36346 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 30858 event pairs, 511 based on Foata normal form. 18/5443 useless extension candidates. Maximal degree in co-relation 24285. Up to 4186 conditions per place. [2024-06-28 02:05:05,474 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 170 selfloop transitions, 37 changer transitions 0/214 dead transitions. [2024-06-28 02:05:05,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 214 transitions, 1989 flow [2024-06-28 02:05:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:05:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:05:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-28 02:05:05,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821256038647343 [2024-06-28 02:05:05,489 INFO L175 Difference]: Start difference. First operand has 109 places, 122 transitions, 1183 flow. Second operand 9 states and 241 transitions. [2024-06-28 02:05:05,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 214 transitions, 1989 flow [2024-06-28 02:05:05,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 214 transitions, 1924 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 02:05:05,538 INFO L231 Difference]: Finished difference. Result has 116 places, 128 transitions, 1281 flow [2024-06-28 02:05:05,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1281, PETRI_PLACES=116, PETRI_TRANSITIONS=128} [2024-06-28 02:05:05,538 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 66 predicate places. [2024-06-28 02:05:05,538 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 128 transitions, 1281 flow [2024-06-28 02:05:05,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:05,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:05,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:05,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:05:05,539 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:05,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash 641429533, now seen corresponding path program 2 times [2024-06-28 02:05:05,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:05,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916377119] [2024-06-28 02:05:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:05,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:08,569 INFO 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 02:05:08,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:08,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916377119] [2024-06-28 02:05:08,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916377119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:08,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:08,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:08,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723330317] [2024-06-28 02:05:08,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:08,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:08,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:08,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:08,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:05:08,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 128 transitions, 1281 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:08,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:08,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:05:08,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:10,086 INFO L124 PetriNetUnfolderBase]: 3516/5356 cut-off events. [2024-06-28 02:05:10,086 INFO L125 PetriNetUnfolderBase]: For 37918/37918 co-relation queries the response was YES. [2024-06-28 02:05:10,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24703 conditions, 5356 events. 3516/5356 cut-off events. For 37918/37918 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 30424 event pairs, 758 based on Foata normal form. 24/5379 useless extension candidates. Maximal degree in co-relation 24651. Up to 4550 conditions per place. [2024-06-28 02:05:10,121 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 159 selfloop transitions, 33 changer transitions 0/199 dead transitions. [2024-06-28 02:05:10,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 199 transitions, 1908 flow [2024-06-28 02:05:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-28 02:05:10,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733695652173914 [2024-06-28 02:05:10,123 INFO L175 Difference]: Start difference. First operand has 116 places, 128 transitions, 1281 flow. Second operand 8 states and 211 transitions. [2024-06-28 02:05:10,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 199 transitions, 1908 flow [2024-06-28 02:05:10,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 199 transitions, 1842 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:10,181 INFO L231 Difference]: Finished difference. Result has 119 places, 129 transitions, 1312 flow [2024-06-28 02:05:10,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1312, PETRI_PLACES=119, PETRI_TRANSITIONS=129} [2024-06-28 02:05:10,182 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-06-28 02:05:10,182 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 1312 flow [2024-06-28 02:05:10,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:10,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:10,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:10,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:05:10,183 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:10,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:10,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1104581671, now seen corresponding path program 3 times [2024-06-28 02:05:10,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:10,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535082927] [2024-06-28 02:05:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:10,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:12,914 INFO 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 02:05:12,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:12,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535082927] [2024-06-28 02:05:12,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535082927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:12,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:12,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:12,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850344521] [2024-06-28 02:05:12,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:12,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:12,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:12,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:12,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:05:12,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 129 transitions, 1312 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:12,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:12,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:05:12,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:14,775 INFO L124 PetriNetUnfolderBase]: 3692/5638 cut-off events. [2024-06-28 02:05:14,775 INFO L125 PetriNetUnfolderBase]: For 38843/38843 co-relation queries the response was YES. [2024-06-28 02:05:14,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25990 conditions, 5638 events. 3692/5638 cut-off events. For 38843/38843 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32457 event pairs, 802 based on Foata normal form. 16/5652 useless extension candidates. Maximal degree in co-relation 25936. Up to 4870 conditions per place. [2024-06-28 02:05:14,809 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 148 selfloop transitions, 42 changer transitions 0/197 dead transitions. [2024-06-28 02:05:14,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 197 transitions, 1926 flow [2024-06-28 02:05:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 02:05:14,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2024-06-28 02:05:14,813 INFO L175 Difference]: Start difference. First operand has 119 places, 129 transitions, 1312 flow. Second operand 8 states and 206 transitions. [2024-06-28 02:05:14,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 197 transitions, 1926 flow [2024-06-28 02:05:14,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 197 transitions, 1864 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 02:05:14,857 INFO L231 Difference]: Finished difference. Result has 121 places, 130 transitions, 1361 flow [2024-06-28 02:05:14,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1361, PETRI_PLACES=121, PETRI_TRANSITIONS=130} [2024-06-28 02:05:14,857 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-06-28 02:05:14,857 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 130 transitions, 1361 flow [2024-06-28 02:05:14,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:14,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:14,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:14,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:05:14,858 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:14,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:14,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1104766121, now seen corresponding path program 1 times [2024-06-28 02:05:14,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:14,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957882780] [2024-06-28 02:05:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:14,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:17,629 INFO 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 02:05:17,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:17,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957882780] [2024-06-28 02:05:17,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957882780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:17,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:17,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:17,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276314709] [2024-06-28 02:05:17,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:17,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:17,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:17,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:17,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:05:17,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 130 transitions, 1361 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:17,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:17,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:05:17,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:19,155 INFO L124 PetriNetUnfolderBase]: 3818/5860 cut-off events. [2024-06-28 02:05:19,156 INFO L125 PetriNetUnfolderBase]: For 43785/43785 co-relation queries the response was YES. [2024-06-28 02:05:19,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27236 conditions, 5860 events. 3818/5860 cut-off events. For 43785/43785 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 34133 event pairs, 786 based on Foata normal form. 12/5870 useless extension candidates. Maximal degree in co-relation 27181. Up to 4536 conditions per place. [2024-06-28 02:05:19,193 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 149 selfloop transitions, 45 changer transitions 0/201 dead transitions. [2024-06-28 02:05:19,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 201 transitions, 1997 flow [2024-06-28 02:05:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-28 02:05:19,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-06-28 02:05:19,213 INFO L175 Difference]: Start difference. First operand has 121 places, 130 transitions, 1361 flow. Second operand 8 states and 208 transitions. [2024-06-28 02:05:19,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 201 transitions, 1997 flow [2024-06-28 02:05:19,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 201 transitions, 1908 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 02:05:19,265 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 1391 flow [2024-06-28 02:05:19,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1391, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2024-06-28 02:05:19,266 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 73 predicate places. [2024-06-28 02:05:19,267 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 1391 flow [2024-06-28 02:05:19,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:19,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:19,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:19,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:05:19,268 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:19,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1732940259, now seen corresponding path program 4 times [2024-06-28 02:05:19,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:19,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583536510] [2024-06-28 02:05:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:19,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:21,744 INFO 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 02:05:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583536510] [2024-06-28 02:05:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583536510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:21,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:21,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:21,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583770926] [2024-06-28 02:05:21,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:21,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:21,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:21,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:21,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:21,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:05:21,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 1391 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:21,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:21,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:05:21,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:23,530 INFO L124 PetriNetUnfolderBase]: 3936/6060 cut-off events. [2024-06-28 02:05:23,531 INFO L125 PetriNetUnfolderBase]: For 48329/48333 co-relation queries the response was YES. [2024-06-28 02:05:23,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28270 conditions, 6060 events. 3936/6060 cut-off events. For 48329/48333 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35563 event pairs, 885 based on Foata normal form. 17/6076 useless extension candidates. Maximal degree in co-relation 28214. Up to 5254 conditions per place. [2024-06-28 02:05:23,575 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 150 selfloop transitions, 41 changer transitions 0/198 dead transitions. [2024-06-28 02:05:23,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 198 transitions, 2019 flow [2024-06-28 02:05:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:05:23,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489130434782609 [2024-06-28 02:05:23,577 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 1391 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:05:23,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 198 transitions, 2019 flow [2024-06-28 02:05:23,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 198 transitions, 1933 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:23,645 INFO L231 Difference]: Finished difference. Result has 126 places, 132 transitions, 1418 flow [2024-06-28 02:05:23,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1418, PETRI_PLACES=126, PETRI_TRANSITIONS=132} [2024-06-28 02:05:23,646 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-06-28 02:05:23,646 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 132 transitions, 1418 flow [2024-06-28 02:05:23,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:23,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:23,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:23,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:05:23,647 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:23,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:23,647 INFO L85 PathProgramCache]: Analyzing trace with hash -818395967, now seen corresponding path program 2 times [2024-06-28 02:05:23,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:23,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946946043] [2024-06-28 02:05:23,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:23,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:26,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:26,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946946043] [2024-06-28 02:05:26,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946946043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:26,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:26,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:26,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660809126] [2024-06-28 02:05:26,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:26,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:26,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:26,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:26,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:26,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:05:26,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 132 transitions, 1418 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:26,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:26,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:05:26,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:27,737 INFO L124 PetriNetUnfolderBase]: 4062/6278 cut-off events. [2024-06-28 02:05:27,737 INFO L125 PetriNetUnfolderBase]: For 51920/51924 co-relation queries the response was YES. [2024-06-28 02:05:27,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29222 conditions, 6278 events. 4062/6278 cut-off events. For 51920/51924 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37187 event pairs, 885 based on Foata normal form. 13/6290 useless extension candidates. Maximal degree in co-relation 29165. Up to 5222 conditions per place. [2024-06-28 02:05:27,780 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 154 selfloop transitions, 42 changer transitions 0/203 dead transitions. [2024-06-28 02:05:27,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 203 transitions, 2074 flow [2024-06-28 02:05:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-28 02:05:27,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570652173913043 [2024-06-28 02:05:27,781 INFO L175 Difference]: Start difference. First operand has 126 places, 132 transitions, 1418 flow. Second operand 8 states and 205 transitions. [2024-06-28 02:05:27,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 203 transitions, 2074 flow [2024-06-28 02:05:27,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 203 transitions, 1983 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 02:05:27,845 INFO L231 Difference]: Finished difference. Result has 128 places, 133 transitions, 1443 flow [2024-06-28 02:05:27,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1443, PETRI_PLACES=128, PETRI_TRANSITIONS=133} [2024-06-28 02:05:27,845 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 78 predicate places. [2024-06-28 02:05:27,845 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 133 transitions, 1443 flow [2024-06-28 02:05:27,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:27,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:27,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:27,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:05:27,846 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:27,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:27,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1998382271, now seen corresponding path program 3 times [2024-06-28 02:05:27,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:27,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176873562] [2024-06-28 02:05:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:27,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:30,295 INFO 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 02:05:30,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:30,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176873562] [2024-06-28 02:05:30,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176873562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:30,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:30,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:30,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104266179] [2024-06-28 02:05:30,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:30,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:30,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:30,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:30,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:05:30,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 133 transitions, 1443 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:30,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:30,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:05:30,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:32,015 INFO L124 PetriNetUnfolderBase]: 4042/6238 cut-off events. [2024-06-28 02:05:32,015 INFO L125 PetriNetUnfolderBase]: For 50418/50422 co-relation queries the response was YES. [2024-06-28 02:05:32,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28754 conditions, 6238 events. 4042/6238 cut-off events. For 50418/50422 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 36744 event pairs, 712 based on Foata normal form. 13/6250 useless extension candidates. Maximal degree in co-relation 28696. Up to 4148 conditions per place. [2024-06-28 02:05:32,068 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 143 selfloop transitions, 51 changer transitions 0/201 dead transitions. [2024-06-28 02:05:32,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 201 transitions, 2021 flow [2024-06-28 02:05:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:32,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:32,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:05:32,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-06-28 02:05:32,070 INFO L175 Difference]: Start difference. First operand has 128 places, 133 transitions, 1443 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:05:32,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 201 transitions, 2021 flow [2024-06-28 02:05:32,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 201 transitions, 1923 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 02:05:32,132 INFO L231 Difference]: Finished difference. Result has 129 places, 132 transitions, 1411 flow [2024-06-28 02:05:32,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1411, PETRI_PLACES=129, PETRI_TRANSITIONS=132} [2024-06-28 02:05:32,133 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 79 predicate places. [2024-06-28 02:05:32,133 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 132 transitions, 1411 flow [2024-06-28 02:05:32,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:32,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:32,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:32,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:05:32,133 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:32,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:32,134 INFO L85 PathProgramCache]: Analyzing trace with hash 941875568, now seen corresponding path program 1 times [2024-06-28 02:05:32,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:32,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542430791] [2024-06-28 02:05:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:32,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:33,645 INFO 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 02:05:33,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:33,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542430791] [2024-06-28 02:05:33,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542430791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:33,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:33,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:05:33,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506478874] [2024-06-28 02:05:33,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:33,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:05:33,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:33,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:05:33,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:05:33,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-28 02:05:33,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 132 transitions, 1411 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:33,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:33,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-28 02:05:33,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:34,842 INFO L124 PetriNetUnfolderBase]: 3709/6093 cut-off events. [2024-06-28 02:05:34,842 INFO L125 PetriNetUnfolderBase]: For 47655/47669 co-relation queries the response was YES. [2024-06-28 02:05:34,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26860 conditions, 6093 events. 3709/6093 cut-off events. For 47655/47669 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 38897 event pairs, 1153 based on Foata normal form. 12/6049 useless extension candidates. Maximal degree in co-relation 26801. Up to 5420 conditions per place. [2024-06-28 02:05:34,883 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 120 selfloop transitions, 13 changer transitions 0/154 dead transitions. [2024-06-28 02:05:34,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 154 transitions, 1755 flow [2024-06-28 02:05:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:05:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:05:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-28 02:05:34,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2024-06-28 02:05:34,884 INFO L175 Difference]: Start difference. First operand has 129 places, 132 transitions, 1411 flow. Second operand 5 states and 119 transitions. [2024-06-28 02:05:34,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 154 transitions, 1755 flow [2024-06-28 02:05:34,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 154 transitions, 1607 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 02:05:34,937 INFO L231 Difference]: Finished difference. Result has 127 places, 136 transitions, 1336 flow [2024-06-28 02:05:34,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1336, PETRI_PLACES=127, PETRI_TRANSITIONS=136} [2024-06-28 02:05:34,938 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 77 predicate places. [2024-06-28 02:05:34,938 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 136 transitions, 1336 flow [2024-06-28 02:05:34,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:34,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:34,938 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 02:05:34,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:05:34,939 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:34,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash -871395159, now seen corresponding path program 1 times [2024-06-28 02:05:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:34,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459112417] [2024-06-28 02:05:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:34,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:36,371 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 02:05:36,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:36,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459112417] [2024-06-28 02:05:36,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459112417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:36,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:36,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:05:36,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210787028] [2024-06-28 02:05:36,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:36,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:05:36,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:36,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:05:36,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:05:36,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:05:36,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 136 transitions, 1336 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:36,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:36,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:05:36,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:37,747 INFO L124 PetriNetUnfolderBase]: 4054/6546 cut-off events. [2024-06-28 02:05:37,748 INFO L125 PetriNetUnfolderBase]: For 46933/46933 co-relation queries the response was YES. [2024-06-28 02:05:37,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28571 conditions, 6546 events. 4054/6546 cut-off events. For 46933/46933 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 40941 event pairs, 1206 based on Foata normal form. 1/6545 useless extension candidates. Maximal degree in co-relation 28512. Up to 5917 conditions per place. [2024-06-28 02:05:37,801 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 143 selfloop transitions, 21 changer transitions 0/171 dead transitions. [2024-06-28 02:05:37,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 171 transitions, 1872 flow [2024-06-28 02:05:37,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:05:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:05:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-28 02:05:37,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2024-06-28 02:05:37,803 INFO L175 Difference]: Start difference. First operand has 127 places, 136 transitions, 1336 flow. Second operand 6 states and 140 transitions. [2024-06-28 02:05:37,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 171 transitions, 1872 flow [2024-06-28 02:05:37,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 171 transitions, 1827 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 02:05:37,867 INFO L231 Difference]: Finished difference. Result has 130 places, 144 transitions, 1444 flow [2024-06-28 02:05:37,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1444, PETRI_PLACES=130, PETRI_TRANSITIONS=144} [2024-06-28 02:05:37,868 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 80 predicate places. [2024-06-28 02:05:37,868 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 144 transitions, 1444 flow [2024-06-28 02:05:37,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:37,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:37,868 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 02:05:37,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:05:37,868 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:37,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:37,869 INFO L85 PathProgramCache]: Analyzing trace with hash -465348789, now seen corresponding path program 2 times [2024-06-28 02:05:37,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:37,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580328878] [2024-06-28 02:05:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:39,367 INFO 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 02:05:39,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:39,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580328878] [2024-06-28 02:05:39,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580328878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:39,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:39,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:05:39,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909994174] [2024-06-28 02:05:39,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:39,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:05:39,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:05:39,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:05:39,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:05:39,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 144 transitions, 1444 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:39,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:39,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:05:39,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:40,578 INFO L124 PetriNetUnfolderBase]: 4051/6542 cut-off events. [2024-06-28 02:05:40,578 INFO L125 PetriNetUnfolderBase]: For 51731/51731 co-relation queries the response was YES. [2024-06-28 02:05:40,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29369 conditions, 6542 events. 4051/6542 cut-off events. For 51731/51731 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 40842 event pairs, 1206 based on Foata normal form. 1/6541 useless extension candidates. Maximal degree in co-relation 29309. Up to 5925 conditions per place. [2024-06-28 02:05:40,629 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 141 selfloop transitions, 17 changer transitions 0/165 dead transitions. [2024-06-28 02:05:40,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 165 transitions, 1816 flow [2024-06-28 02:05:40,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:05:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:05:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-28 02:05:40,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2024-06-28 02:05:40,631 INFO L175 Difference]: Start difference. First operand has 130 places, 144 transitions, 1444 flow. Second operand 5 states and 119 transitions. [2024-06-28 02:05:40,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 165 transitions, 1816 flow [2024-06-28 02:05:40,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 165 transitions, 1738 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-28 02:05:40,706 INFO L231 Difference]: Finished difference. Result has 133 places, 144 transitions, 1412 flow [2024-06-28 02:05:40,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1412, PETRI_PLACES=133, PETRI_TRANSITIONS=144} [2024-06-28 02:05:40,706 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2024-06-28 02:05:40,707 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 144 transitions, 1412 flow [2024-06-28 02:05:40,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:40,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:40,707 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 02:05:40,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:05:40,707 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:40,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1420760367, now seen corresponding path program 1 times [2024-06-28 02:05:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:40,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495662134] [2024-06-28 02:05:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:40,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:42,965 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 02:05:42,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:42,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495662134] [2024-06-28 02:05:42,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495662134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:42,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:42,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:42,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300681490] [2024-06-28 02:05:42,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:42,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:42,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:42,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:42,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:42,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-28 02:05:42,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 144 transitions, 1412 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:42,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:42,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-28 02:05:42,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:44,391 INFO L124 PetriNetUnfolderBase]: 3941/6238 cut-off events. [2024-06-28 02:05:44,391 INFO L125 PetriNetUnfolderBase]: For 53130/53138 co-relation queries the response was YES. [2024-06-28 02:05:44,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28669 conditions, 6238 events. 3941/6238 cut-off events. For 53130/53138 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 38412 event pairs, 881 based on Foata normal form. 10/6205 useless extension candidates. Maximal degree in co-relation 28607. Up to 5479 conditions per place. [2024-06-28 02:05:44,441 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 151 selfloop transitions, 37 changer transitions 0/209 dead transitions. [2024-06-28 02:05:44,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 209 transitions, 2108 flow [2024-06-28 02:05:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-28 02:05:44,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2024-06-28 02:05:44,443 INFO L175 Difference]: Start difference. First operand has 133 places, 144 transitions, 1412 flow. Second operand 8 states and 198 transitions. [2024-06-28 02:05:44,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 209 transitions, 2108 flow [2024-06-28 02:05:44,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 209 transitions, 2074 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 02:05:44,586 INFO L231 Difference]: Finished difference. Result has 138 places, 157 transitions, 1594 flow [2024-06-28 02:05:44,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1594, PETRI_PLACES=138, PETRI_TRANSITIONS=157} [2024-06-28 02:05:44,587 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 88 predicate places. [2024-06-28 02:05:44,587 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 157 transitions, 1594 flow [2024-06-28 02:05:44,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:44,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:44,588 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 02:05:44,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:05:44,588 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:44,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1540707315, now seen corresponding path program 2 times [2024-06-28 02:05:44,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:44,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177098318] [2024-06-28 02:05:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:44,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:46,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:46,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177098318] [2024-06-28 02:05:46,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177098318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:46,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:46,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:46,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905033352] [2024-06-28 02:05:46,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:46,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:46,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:46,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:46,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:46,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-28 02:05:46,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 157 transitions, 1594 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:46,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:46,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-28 02:05:46,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:48,416 INFO L124 PetriNetUnfolderBase]: 3939/6225 cut-off events. [2024-06-28 02:05:48,417 INFO L125 PetriNetUnfolderBase]: For 59183/59192 co-relation queries the response was YES. [2024-06-28 02:05:48,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30021 conditions, 6225 events. 3939/6225 cut-off events. For 59183/59192 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 38380 event pairs, 876 based on Foata normal form. 10/6188 useless extension candidates. Maximal degree in co-relation 29957. Up to 5395 conditions per place. [2024-06-28 02:05:48,459 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 138 selfloop transitions, 47 changer transitions 0/206 dead transitions. [2024-06-28 02:05:48,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 206 transitions, 2270 flow [2024-06-28 02:05:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-28 02:05:48,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49728260869565216 [2024-06-28 02:05:48,461 INFO L175 Difference]: Start difference. First operand has 138 places, 157 transitions, 1594 flow. Second operand 8 states and 183 transitions. [2024-06-28 02:05:48,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 206 transitions, 2270 flow [2024-06-28 02:05:48,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 206 transitions, 2220 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 02:05:48,528 INFO L231 Difference]: Finished difference. Result has 146 places, 166 transitions, 1773 flow [2024-06-28 02:05:48,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1773, PETRI_PLACES=146, PETRI_TRANSITIONS=166} [2024-06-28 02:05:48,529 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-06-28 02:05:48,529 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 166 transitions, 1773 flow [2024-06-28 02:05:48,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:48,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:48,529 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 02:05:48,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:05:48,529 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:48,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:48,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1096019247, now seen corresponding path program 3 times [2024-06-28 02:05:48,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:48,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407224580] [2024-06-28 02:05:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:48,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:50,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:50,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407224580] [2024-06-28 02:05:50,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407224580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:50,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:50,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:50,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451293669] [2024-06-28 02:05:50,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:50,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:50,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:50,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:50,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-28 02:05:50,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 166 transitions, 1773 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:50,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:50,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-28 02:05:50,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:52,325 INFO L124 PetriNetUnfolderBase]: 3927/6195 cut-off events. [2024-06-28 02:05:52,326 INFO L125 PetriNetUnfolderBase]: For 64225/64232 co-relation queries the response was YES. [2024-06-28 02:05:52,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30995 conditions, 6195 events. 3927/6195 cut-off events. For 64225/64232 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 38007 event pairs, 882 based on Foata normal form. 8/6151 useless extension candidates. Maximal degree in co-relation 30927. Up to 5527 conditions per place. [2024-06-28 02:05:52,379 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 146 selfloop transitions, 37 changer transitions 0/204 dead transitions. [2024-06-28 02:05:52,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 204 transitions, 2299 flow [2024-06-28 02:05:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-28 02:05:52,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4891304347826087 [2024-06-28 02:05:52,381 INFO L175 Difference]: Start difference. First operand has 146 places, 166 transitions, 1773 flow. Second operand 8 states and 180 transitions. [2024-06-28 02:05:52,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 204 transitions, 2299 flow [2024-06-28 02:05:52,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 204 transitions, 2184 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-28 02:05:52,474 INFO L231 Difference]: Finished difference. Result has 150 places, 166 transitions, 1741 flow [2024-06-28 02:05:52,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1741, PETRI_PLACES=150, PETRI_TRANSITIONS=166} [2024-06-28 02:05:52,475 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-06-28 02:05:52,475 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 166 transitions, 1741 flow [2024-06-28 02:05:52,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:52,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:52,475 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 02:05:52,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:05:52,476 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:52,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:52,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1243444335, now seen corresponding path program 1 times [2024-06-28 02:05:52,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:52,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222831896] [2024-06-28 02:05:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:52,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:54,242 INFO 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 02:05:54,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:54,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222831896] [2024-06-28 02:05:54,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222831896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:54,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:54,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:54,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326857896] [2024-06-28 02:05:54,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:54,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:54,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:54,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:54,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:54,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:05:54,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 166 transitions, 1741 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:54,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:54,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:05:54,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:55,731 INFO L124 PetriNetUnfolderBase]: 4325/6890 cut-off events. [2024-06-28 02:05:55,732 INFO L125 PetriNetUnfolderBase]: For 67584/67584 co-relation queries the response was YES. [2024-06-28 02:05:55,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33081 conditions, 6890 events. 4325/6890 cut-off events. For 67584/67584 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 42705 event pairs, 1216 based on Foata normal form. 2/6890 useless extension candidates. Maximal degree in co-relation 33013. Up to 6203 conditions per place. [2024-06-28 02:05:55,792 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 171 selfloop transitions, 31 changer transitions 0/209 dead transitions. [2024-06-28 02:05:55,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 209 transitions, 2393 flow [2024-06-28 02:05:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:05:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:05:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-28 02:05:55,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124223602484472 [2024-06-28 02:05:55,794 INFO L175 Difference]: Start difference. First operand has 150 places, 166 transitions, 1741 flow. Second operand 7 states and 165 transitions. [2024-06-28 02:05:55,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 209 transitions, 2393 flow [2024-06-28 02:05:55,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 209 transitions, 2313 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 02:05:55,895 INFO L231 Difference]: Finished difference. Result has 151 places, 174 transitions, 1846 flow [2024-06-28 02:05:55,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1846, PETRI_PLACES=151, PETRI_TRANSITIONS=174} [2024-06-28 02:05:55,895 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 101 predicate places. [2024-06-28 02:05:55,896 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 174 transitions, 1846 flow [2024-06-28 02:05:55,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:55,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:55,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:55,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:05:55,896 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:55,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash 432501181, now seen corresponding path program 2 times [2024-06-28 02:05:55,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:55,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424930822] [2024-06-28 02:05:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:55,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:57,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:57,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424930822] [2024-06-28 02:05:57,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424930822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:57,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:57,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:57,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135214909] [2024-06-28 02:05:57,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:57,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:57,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:57,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:57,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:57,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:05:57,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 174 transitions, 1846 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:57,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:57,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:05:57,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:59,078 INFO L124 PetriNetUnfolderBase]: 4361/6954 cut-off events. [2024-06-28 02:05:59,078 INFO L125 PetriNetUnfolderBase]: For 73554/73554 co-relation queries the response was YES. [2024-06-28 02:05:59,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34243 conditions, 6954 events. 4361/6954 cut-off events. For 73554/73554 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 43101 event pairs, 1216 based on Foata normal form. 2/6954 useless extension candidates. Maximal degree in co-relation 34174. Up to 6268 conditions per place. [2024-06-28 02:05:59,136 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 173 selfloop transitions, 28 changer transitions 0/208 dead transitions. [2024-06-28 02:05:59,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 208 transitions, 2440 flow [2024-06-28 02:05:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:05:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:05:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 02:05:59,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253623188405797 [2024-06-28 02:05:59,138 INFO L175 Difference]: Start difference. First operand has 151 places, 174 transitions, 1846 flow. Second operand 6 states and 145 transitions. [2024-06-28 02:05:59,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 208 transitions, 2440 flow [2024-06-28 02:05:59,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 208 transitions, 2356 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-28 02:05:59,251 INFO L231 Difference]: Finished difference. Result has 154 places, 178 transitions, 1887 flow [2024-06-28 02:05:59,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1887, PETRI_PLACES=154, PETRI_TRANSITIONS=178} [2024-06-28 02:05:59,252 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 104 predicate places. [2024-06-28 02:05:59,252 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 178 transitions, 1887 flow [2024-06-28 02:05:59,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:59,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:59,252 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 02:05:59,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:05:59,253 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:59,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:59,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1540701363, now seen corresponding path program 3 times [2024-06-28 02:05:59,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:59,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443753461] [2024-06-28 02:05:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:59,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:01,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:01,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443753461] [2024-06-28 02:06:01,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443753461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:01,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:01,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:01,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746456808] [2024-06-28 02:06:01,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:01,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:01,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:01,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:01,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:01,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:01,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 178 transitions, 1887 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:01,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:01,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:01,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:02,966 INFO L124 PetriNetUnfolderBase]: 4355/6946 cut-off events. [2024-06-28 02:06:02,966 INFO L125 PetriNetUnfolderBase]: For 74281/74281 co-relation queries the response was YES. [2024-06-28 02:06:02,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34150 conditions, 6946 events. 4355/6946 cut-off events. For 74281/74281 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 43095 event pairs, 1206 based on Foata normal form. 2/6946 useless extension candidates. Maximal degree in co-relation 34079. Up to 6263 conditions per place. [2024-06-28 02:06:03,020 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 181 selfloop transitions, 29 changer transitions 0/217 dead transitions. [2024-06-28 02:06:03,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 217 transitions, 2405 flow [2024-06-28 02:06:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:06:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:06:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-28 02:06:03,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945652173913043 [2024-06-28 02:06:03,022 INFO L175 Difference]: Start difference. First operand has 154 places, 178 transitions, 1887 flow. Second operand 8 states and 182 transitions. [2024-06-28 02:06:03,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 217 transitions, 2405 flow [2024-06-28 02:06:03,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 217 transitions, 2297 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 02:06:03,147 INFO L231 Difference]: Finished difference. Result has 158 places, 178 transitions, 1844 flow [2024-06-28 02:06:03,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1844, PETRI_PLACES=158, PETRI_TRANSITIONS=178} [2024-06-28 02:06:03,147 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 108 predicate places. [2024-06-28 02:06:03,148 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 178 transitions, 1844 flow [2024-06-28 02:06:03,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:03,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:03,148 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 02:06:03,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:06:03,148 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:03,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1540693427, now seen corresponding path program 1 times [2024-06-28 02:06:03,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:03,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889176619] [2024-06-28 02:06:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:03,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:05,900 INFO 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 02:06:05,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:05,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889176619] [2024-06-28 02:06:05,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889176619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:05,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:05,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:05,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236882664] [2024-06-28 02:06:05,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:05,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:05,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:05,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:05,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:06:06,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-28 02:06:06,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 178 transitions, 1844 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:06,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:06,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-28 02:06:06,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:07,313 INFO L124 PetriNetUnfolderBase]: 3959/6460 cut-off events. [2024-06-28 02:06:07,313 INFO L125 PetriNetUnfolderBase]: For 71722/71736 co-relation queries the response was YES. [2024-06-28 02:06:07,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31523 conditions, 6460 events. 3959/6460 cut-off events. For 71722/71736 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 41198 event pairs, 1143 based on Foata normal form. 10/6426 useless extension candidates. Maximal degree in co-relation 31451. Up to 5726 conditions per place. [2024-06-28 02:06:07,370 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 168 selfloop transitions, 16 changer transitions 0/205 dead transitions. [2024-06-28 02:06:07,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 205 transitions, 2324 flow [2024-06-28 02:06:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:06:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:06:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-28 02:06:07,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2024-06-28 02:06:07,372 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 1844 flow. Second operand 6 states and 140 transitions. [2024-06-28 02:06:07,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 205 transitions, 2324 flow [2024-06-28 02:06:07,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 205 transitions, 2238 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 02:06:07,466 INFO L231 Difference]: Finished difference. Result has 157 places, 181 transitions, 1854 flow [2024-06-28 02:06:07,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1854, PETRI_PLACES=157, PETRI_TRANSITIONS=181} [2024-06-28 02:06:07,467 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-06-28 02:06:07,467 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 181 transitions, 1854 flow [2024-06-28 02:06:07,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:07,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:07,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:07,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:06:07,468 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:07,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:07,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1098665112, now seen corresponding path program 1 times [2024-06-28 02:06:07,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:07,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718853215] [2024-06-28 02:06:07,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:07,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:10,127 INFO 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 02:06:10,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:10,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718853215] [2024-06-28 02:06:10,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718853215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:10,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:10,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:10,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403748940] [2024-06-28 02:06:10,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:10,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:10,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:10,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:10,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:10,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:10,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 181 transitions, 1854 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:10,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:10,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:10,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:11,811 INFO L124 PetriNetUnfolderBase]: 4399/6790 cut-off events. [2024-06-28 02:06:11,811 INFO L125 PetriNetUnfolderBase]: For 79886/79886 co-relation queries the response was YES. [2024-06-28 02:06:11,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34556 conditions, 6790 events. 4399/6790 cut-off events. For 79886/79886 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 40573 event pairs, 922 based on Foata normal form. 1/6789 useless extension candidates. Maximal degree in co-relation 34483. Up to 6104 conditions per place. [2024-06-28 02:06:11,874 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 182 selfloop transitions, 53 changer transitions 0/242 dead transitions. [2024-06-28 02:06:11,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 242 transitions, 2800 flow [2024-06-28 02:06:11,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 02:06:11,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546583850931677 [2024-06-28 02:06:11,876 INFO L175 Difference]: Start difference. First operand has 157 places, 181 transitions, 1854 flow. Second operand 7 states and 176 transitions. [2024-06-28 02:06:11,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 242 transitions, 2800 flow [2024-06-28 02:06:12,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 242 transitions, 2726 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 02:06:12,032 INFO L231 Difference]: Finished difference. Result has 161 places, 193 transitions, 2094 flow [2024-06-28 02:06:12,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2094, PETRI_PLACES=161, PETRI_TRANSITIONS=193} [2024-06-28 02:06:12,034 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 111 predicate places. [2024-06-28 02:06:12,034 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 193 transitions, 2094 flow [2024-06-28 02:06:12,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:12,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:12,034 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 02:06:12,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:06:12,035 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:12,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:12,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1093903512, now seen corresponding path program 2 times [2024-06-28 02:06:12,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:12,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860304537] [2024-06-28 02:06:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:12,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:14,767 INFO 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 02:06:14,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:14,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860304537] [2024-06-28 02:06:14,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860304537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:14,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:14,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:14,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776272804] [2024-06-28 02:06:14,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:14,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:14,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:14,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:14,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:14,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:14,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 193 transitions, 2094 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:14,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:14,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:14,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:16,381 INFO L124 PetriNetUnfolderBase]: 4445/6921 cut-off events. [2024-06-28 02:06:16,382 INFO L125 PetriNetUnfolderBase]: For 87656/87656 co-relation queries the response was YES. [2024-06-28 02:06:16,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36106 conditions, 6921 events. 4445/6921 cut-off events. For 87656/87656 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41900 event pairs, 947 based on Foata normal form. 1/6921 useless extension candidates. Maximal degree in co-relation 36031. Up to 6285 conditions per place. [2024-06-28 02:06:16,439 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 200 selfloop transitions, 36 changer transitions 0/243 dead transitions. [2024-06-28 02:06:16,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 243 transitions, 2818 flow [2024-06-28 02:06:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-28 02:06:16,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5279503105590062 [2024-06-28 02:06:16,441 INFO L175 Difference]: Start difference. First operand has 161 places, 193 transitions, 2094 flow. Second operand 7 states and 170 transitions. [2024-06-28 02:06:16,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 243 transitions, 2818 flow [2024-06-28 02:06:16,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 243 transitions, 2760 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-28 02:06:16,594 INFO L231 Difference]: Finished difference. Result has 167 places, 199 transitions, 2205 flow [2024-06-28 02:06:16,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2205, PETRI_PLACES=167, PETRI_TRANSITIONS=199} [2024-06-28 02:06:16,595 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 117 predicate places. [2024-06-28 02:06:16,595 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 199 transitions, 2205 flow [2024-06-28 02:06:16,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:16,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:16,595 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 02:06:16,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:06:16,596 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:16,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash 97444712, now seen corresponding path program 3 times [2024-06-28 02:06:16,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:16,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582378227] [2024-06-28 02:06:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:16,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:18,771 INFO 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 02:06:18,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:18,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582378227] [2024-06-28 02:06:18,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582378227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:18,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:18,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:18,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290431864] [2024-06-28 02:06:18,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:18,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:18,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:18,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:18,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:18,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:18,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 199 transitions, 2205 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:18,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:18,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:18,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:20,584 INFO L124 PetriNetUnfolderBase]: 4468/6940 cut-off events. [2024-06-28 02:06:20,585 INFO L125 PetriNetUnfolderBase]: For 91170/91174 co-relation queries the response was YES. [2024-06-28 02:06:20,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36294 conditions, 6940 events. 4468/6940 cut-off events. For 91170/91174 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 41890 event pairs, 951 based on Foata normal form. 5/6944 useless extension candidates. Maximal degree in co-relation 36216. Up to 6183 conditions per place. [2024-06-28 02:06:20,647 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 185 selfloop transitions, 58 changer transitions 0/250 dead transitions. [2024-06-28 02:06:20,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 250 transitions, 3069 flow [2024-06-28 02:06:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:06:20,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2024-06-28 02:06:20,649 INFO L175 Difference]: Start difference. First operand has 167 places, 199 transitions, 2205 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:06:20,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 250 transitions, 3069 flow [2024-06-28 02:06:20,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 250 transitions, 2987 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 02:06:20,783 INFO L231 Difference]: Finished difference. Result has 169 places, 202 transitions, 2292 flow [2024-06-28 02:06:20,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2292, PETRI_PLACES=169, PETRI_TRANSITIONS=202} [2024-06-28 02:06:20,784 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 119 predicate places. [2024-06-28 02:06:20,784 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 202 transitions, 2292 flow [2024-06-28 02:06:20,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:20,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:20,784 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 02:06:20,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:06:20,785 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:20,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:20,785 INFO L85 PathProgramCache]: Analyzing trace with hash 852406524, now seen corresponding path program 4 times [2024-06-28 02:06:20,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:20,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144417752] [2024-06-28 02:06:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:20,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:22,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:22,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144417752] [2024-06-28 02:06:22,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144417752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:22,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:22,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:22,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980235313] [2024-06-28 02:06:22,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:22,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:22,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:22,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:22,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:23,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:23,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 202 transitions, 2292 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:23,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:23,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:23,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:24,823 INFO L124 PetriNetUnfolderBase]: 4496/6982 cut-off events. [2024-06-28 02:06:24,824 INFO L125 PetriNetUnfolderBase]: For 94768/94772 co-relation queries the response was YES. [2024-06-28 02:06:24,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36864 conditions, 6982 events. 4496/6982 cut-off events. For 94768/94772 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 42181 event pairs, 951 based on Foata normal form. 5/6986 useless extension candidates. Maximal degree in co-relation 36785. Up to 6211 conditions per place. [2024-06-28 02:06:24,877 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 178 selfloop transitions, 65 changer transitions 0/250 dead transitions. [2024-06-28 02:06:24,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 250 transitions, 3129 flow [2024-06-28 02:06:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 02:06:24,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186335403726708 [2024-06-28 02:06:24,878 INFO L175 Difference]: Start difference. First operand has 169 places, 202 transitions, 2292 flow. Second operand 7 states and 167 transitions. [2024-06-28 02:06:24,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 250 transitions, 3129 flow [2024-06-28 02:06:25,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 250 transitions, 2968 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 02:06:25,021 INFO L231 Difference]: Finished difference. Result has 172 places, 208 transitions, 2392 flow [2024-06-28 02:06:25,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2392, PETRI_PLACES=172, PETRI_TRANSITIONS=208} [2024-06-28 02:06:25,021 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 122 predicate places. [2024-06-28 02:06:25,022 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 208 transitions, 2392 flow [2024-06-28 02:06:25,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:25,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:25,022 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 02:06:25,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:06:25,022 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:25,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash -523542134, now seen corresponding path program 5 times [2024-06-28 02:06:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:25,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155274874] [2024-06-28 02:06:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:25,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:27,294 INFO 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 02:06:27,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:27,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155274874] [2024-06-28 02:06:27,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155274874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:27,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:27,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:27,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208784259] [2024-06-28 02:06:27,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:27,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:27,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:27,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:27,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:27,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:27,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 208 transitions, 2392 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:27,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:27,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:27,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:28,810 INFO L124 PetriNetUnfolderBase]: 4493/6976 cut-off events. [2024-06-28 02:06:28,811 INFO L125 PetriNetUnfolderBase]: For 96990/96992 co-relation queries the response was YES. [2024-06-28 02:06:28,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36787 conditions, 6976 events. 4493/6976 cut-off events. For 96990/96992 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 42102 event pairs, 964 based on Foata normal form. 1/6976 useless extension candidates. Maximal degree in co-relation 36707. Up to 6156 conditions per place. [2024-06-28 02:06:28,875 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 173 selfloop transitions, 68 changer transitions 0/248 dead transitions. [2024-06-28 02:06:28,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 248 transitions, 3110 flow [2024-06-28 02:06:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:06:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:06:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-28 02:06:28,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2024-06-28 02:06:28,877 INFO L175 Difference]: Start difference. First operand has 172 places, 208 transitions, 2392 flow. Second operand 6 states and 152 transitions. [2024-06-28 02:06:28,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 248 transitions, 3110 flow [2024-06-28 02:06:29,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 248 transitions, 3008 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 02:06:29,032 INFO L231 Difference]: Finished difference. Result has 175 places, 208 transitions, 2441 flow [2024-06-28 02:06:29,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2441, PETRI_PLACES=175, PETRI_TRANSITIONS=208} [2024-06-28 02:06:29,033 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 125 predicate places. [2024-06-28 02:06:29,033 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 208 transitions, 2441 flow [2024-06-28 02:06:29,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:29,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:29,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:29,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:06:29,034 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:29,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1036470510, now seen corresponding path program 6 times [2024-06-28 02:06:29,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:29,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132180430] [2024-06-28 02:06:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:29,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:31,170 INFO 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 02:06:31,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:31,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132180430] [2024-06-28 02:06:31,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132180430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:31,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:31,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:31,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443837357] [2024-06-28 02:06:31,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:31,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:31,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:31,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 208 transitions, 2441 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:31,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:31,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:31,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:32,916 INFO L124 PetriNetUnfolderBase]: 4490/6979 cut-off events. [2024-06-28 02:06:32,916 INFO L125 PetriNetUnfolderBase]: For 99488/99488 co-relation queries the response was YES. [2024-06-28 02:06:32,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36921 conditions, 6979 events. 4490/6979 cut-off events. For 99488/99488 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 42192 event pairs, 922 based on Foata normal form. 1/6979 useless extension candidates. Maximal degree in co-relation 36840. Up to 6153 conditions per place. [2024-06-28 02:06:32,987 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 191 selfloop transitions, 72 changer transitions 0/270 dead transitions. [2024-06-28 02:06:32,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 270 transitions, 3193 flow [2024-06-28 02:06:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:06:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:06:32,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-28 02:06:32,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570652173913043 [2024-06-28 02:06:32,989 INFO L175 Difference]: Start difference. First operand has 175 places, 208 transitions, 2441 flow. Second operand 8 states and 205 transitions. [2024-06-28 02:06:32,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 270 transitions, 3193 flow [2024-06-28 02:06:33,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 270 transitions, 3052 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 02:06:33,169 INFO L231 Difference]: Finished difference. Result has 177 places, 208 transitions, 2477 flow [2024-06-28 02:06:33,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2300, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2477, PETRI_PLACES=177, PETRI_TRANSITIONS=208} [2024-06-28 02:06:33,170 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 127 predicate places. [2024-06-28 02:06:33,170 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 208 transitions, 2477 flow [2024-06-28 02:06:33,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:33,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:33,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:33,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:06:33,171 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:33,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash 849557500, now seen corresponding path program 1 times [2024-06-28 02:06:33,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:33,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905608188] [2024-06-28 02:06:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:33,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:35,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:35,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905608188] [2024-06-28 02:06:35,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905608188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:35,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:35,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:35,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358184552] [2024-06-28 02:06:35,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:35,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:35,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:35,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:35,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:35,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:35,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 208 transitions, 2477 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:35,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:35,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:35,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:36,794 INFO L124 PetriNetUnfolderBase]: 4520/7201 cut-off events. [2024-06-28 02:06:36,794 INFO L125 PetriNetUnfolderBase]: For 104395/104395 co-relation queries the response was YES. [2024-06-28 02:06:36,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37546 conditions, 7201 events. 4520/7201 cut-off events. For 104395/104395 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 44962 event pairs, 1136 based on Foata normal form. 2/7201 useless extension candidates. Maximal degree in co-relation 37466. Up to 6451 conditions per place. [2024-06-28 02:06:36,852 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 216 selfloop transitions, 29 changer transitions 0/252 dead transitions. [2024-06-28 02:06:36,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 252 transitions, 3255 flow [2024-06-28 02:06:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-28 02:06:36,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124223602484472 [2024-06-28 02:06:36,858 INFO L175 Difference]: Start difference. First operand has 177 places, 208 transitions, 2477 flow. Second operand 7 states and 165 transitions. [2024-06-28 02:06:36,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 252 transitions, 3255 flow [2024-06-28 02:06:36,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 252 transitions, 3015 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-28 02:06:36,979 INFO L231 Difference]: Finished difference. Result has 175 places, 214 transitions, 2431 flow [2024-06-28 02:06:36,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2431, PETRI_PLACES=175, PETRI_TRANSITIONS=214} [2024-06-28 02:06:36,981 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 125 predicate places. [2024-06-28 02:06:36,981 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 214 transitions, 2431 flow [2024-06-28 02:06:36,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:36,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:36,981 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 02:06:36,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:06:36,982 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:36,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:36,982 INFO L85 PathProgramCache]: Analyzing trace with hash 107928168, now seen corresponding path program 2 times [2024-06-28 02:06:36,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:36,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548224257] [2024-06-28 02:06:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:36,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:38,967 INFO 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 02:06:38,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:38,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548224257] [2024-06-28 02:06:38,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548224257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:38,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:38,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:38,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653655804] [2024-06-28 02:06:38,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:38,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:38,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:38,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:38,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:39,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:39,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 214 transitions, 2431 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:39,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:39,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:39,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:40,762 INFO L124 PetriNetUnfolderBase]: 4550/7244 cut-off events. [2024-06-28 02:06:40,762 INFO L125 PetriNetUnfolderBase]: For 100625/100625 co-relation queries the response was YES. [2024-06-28 02:06:40,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37648 conditions, 7244 events. 4550/7244 cut-off events. For 100625/100625 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 45318 event pairs, 1230 based on Foata normal form. 2/7244 useless extension candidates. Maximal degree in co-relation 37568. Up to 6568 conditions per place. [2024-06-28 02:06:40,862 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 218 selfloop transitions, 24 changer transitions 0/249 dead transitions. [2024-06-28 02:06:40,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 249 transitions, 3063 flow [2024-06-28 02:06:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-28 02:06:40,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937888198757764 [2024-06-28 02:06:40,865 INFO L175 Difference]: Start difference. First operand has 175 places, 214 transitions, 2431 flow. Second operand 7 states and 159 transitions. [2024-06-28 02:06:40,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 249 transitions, 3063 flow [2024-06-28 02:06:41,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 249 transitions, 2938 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-28 02:06:41,022 INFO L231 Difference]: Finished difference. Result has 179 places, 217 transitions, 2432 flow [2024-06-28 02:06:41,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2432, PETRI_PLACES=179, PETRI_TRANSITIONS=217} [2024-06-28 02:06:41,022 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 129 predicate places. [2024-06-28 02:06:41,022 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 217 transitions, 2432 flow [2024-06-28 02:06:41,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:41,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:41,023 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 02:06:41,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:06:41,023 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:41,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:41,024 INFO L85 PathProgramCache]: Analyzing trace with hash -523534198, now seen corresponding path program 3 times [2024-06-28 02:06:41,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:41,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342399207] [2024-06-28 02:06:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:41,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:43,019 INFO 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 02:06:43,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:43,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342399207] [2024-06-28 02:06:43,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342399207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:43,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:43,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:43,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469009580] [2024-06-28 02:06:43,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:43,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:43,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:43,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:43,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:43,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:43,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 217 transitions, 2432 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:43,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:43,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:43,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:44,661 INFO L124 PetriNetUnfolderBase]: 4545/7236 cut-off events. [2024-06-28 02:06:44,661 INFO L125 PetriNetUnfolderBase]: For 100820/100820 co-relation queries the response was YES. [2024-06-28 02:06:44,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37317 conditions, 7236 events. 4545/7236 cut-off events. For 100820/100820 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 45152 event pairs, 1135 based on Foata normal form. 2/7236 useless extension candidates. Maximal degree in co-relation 37235. Up to 6534 conditions per place. [2024-06-28 02:06:44,735 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 218 selfloop transitions, 23 changer transitions 0/248 dead transitions. [2024-06-28 02:06:44,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 248 transitions, 2996 flow [2024-06-28 02:06:44,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:06:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:06:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-28 02:06:44,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-28 02:06:44,737 INFO L175 Difference]: Start difference. First operand has 179 places, 217 transitions, 2432 flow. Second operand 6 states and 144 transitions. [2024-06-28 02:06:44,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 248 transitions, 2996 flow [2024-06-28 02:06:44,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 248 transitions, 2898 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 02:06:44,911 INFO L231 Difference]: Finished difference. Result has 180 places, 217 transitions, 2390 flow [2024-06-28 02:06:44,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2390, PETRI_PLACES=180, PETRI_TRANSITIONS=217} [2024-06-28 02:06:44,912 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-06-28 02:06:44,912 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 217 transitions, 2390 flow [2024-06-28 02:06:44,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:44,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:44,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:44,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:06:44,912 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:44,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:44,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1720162769, now seen corresponding path program 1 times [2024-06-28 02:06:44,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:44,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302007422] [2024-06-28 02:06:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:44,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:47,753 INFO 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 02:06:47,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:47,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302007422] [2024-06-28 02:06:47,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302007422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:47,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:47,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:47,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799827680] [2024-06-28 02:06:47,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:47,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:47,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:47,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:47,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:06:47,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:47,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 217 transitions, 2390 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:47,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:47,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:47,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:49,523 INFO L124 PetriNetUnfolderBase]: 4568/7082 cut-off events. [2024-06-28 02:06:49,523 INFO L125 PetriNetUnfolderBase]: For 101330/101330 co-relation queries the response was YES. [2024-06-28 02:06:49,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37306 conditions, 7082 events. 4568/7082 cut-off events. For 101330/101330 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 42840 event pairs, 929 based on Foata normal form. 1/7082 useless extension candidates. Maximal degree in co-relation 37223. Up to 6416 conditions per place. [2024-06-28 02:06:49,586 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 231 selfloop transitions, 43 changer transitions 0/281 dead transitions. [2024-06-28 02:06:49,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 281 transitions, 3224 flow [2024-06-28 02:06:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:06:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:06:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:06:49,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489130434782609 [2024-06-28 02:06:49,593 INFO L175 Difference]: Start difference. First operand has 180 places, 217 transitions, 2390 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:06:49,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 281 transitions, 3224 flow [2024-06-28 02:06:49,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 281 transitions, 3168 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 02:06:49,762 INFO L231 Difference]: Finished difference. Result has 183 places, 220 transitions, 2476 flow [2024-06-28 02:06:49,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2476, PETRI_PLACES=183, PETRI_TRANSITIONS=220} [2024-06-28 02:06:49,764 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 133 predicate places. [2024-06-28 02:06:49,764 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 220 transitions, 2476 flow [2024-06-28 02:06:49,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:49,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:49,764 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 02:06:49,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:06:49,765 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:49,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:49,765 INFO L85 PathProgramCache]: Analyzing trace with hash 300852603, now seen corresponding path program 2 times [2024-06-28 02:06:49,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:49,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251126858] [2024-06-28 02:06:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:49,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:52,568 INFO 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 02:06:52,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:52,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251126858] [2024-06-28 02:06:52,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251126858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:52,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:52,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:52,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040553268] [2024-06-28 02:06:52,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:52,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:52,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:52,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:52,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:06:52,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:52,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 220 transitions, 2476 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:52,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:52,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:52,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:54,655 INFO L124 PetriNetUnfolderBase]: 4617/7121 cut-off events. [2024-06-28 02:06:54,655 INFO L125 PetriNetUnfolderBase]: For 111165/111165 co-relation queries the response was YES. [2024-06-28 02:06:54,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38839 conditions, 7121 events. 4617/7121 cut-off events. For 111165/111165 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 42829 event pairs, 924 based on Foata normal form. 1/7120 useless extension candidates. Maximal degree in co-relation 38755. Up to 6063 conditions per place. [2024-06-28 02:06:54,729 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 195 selfloop transitions, 87 changer transitions 0/289 dead transitions. [2024-06-28 02:06:54,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 289 transitions, 3576 flow [2024-06-28 02:06:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:06:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:06:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:06:54,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-06-28 02:06:54,732 INFO L175 Difference]: Start difference. First operand has 183 places, 220 transitions, 2476 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:06:54,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 289 transitions, 3576 flow [2024-06-28 02:06:54,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 289 transitions, 3468 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 02:06:54,935 INFO L231 Difference]: Finished difference. Result has 185 places, 229 transitions, 2704 flow [2024-06-28 02:06:54,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2704, PETRI_PLACES=185, PETRI_TRANSITIONS=229} [2024-06-28 02:06:54,936 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 135 predicate places. [2024-06-28 02:06:54,936 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 229 transitions, 2704 flow [2024-06-28 02:06:54,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:54,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:54,937 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 02:06:54,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:06:54,937 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:54,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:54,937 INFO L85 PathProgramCache]: Analyzing trace with hash 301121714, now seen corresponding path program 1 times [2024-06-28 02:06:54,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:54,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246432020] [2024-06-28 02:06:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:57,425 INFO 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 02:06:57,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:57,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246432020] [2024-06-28 02:06:57,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246432020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:57,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:57,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:57,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527053795] [2024-06-28 02:06:57,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:57,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:57,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:57,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:57,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:06:57,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:06:57,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 229 transitions, 2704 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:57,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:57,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:06:57,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:59,433 INFO L124 PetriNetUnfolderBase]: 4767/7343 cut-off events. [2024-06-28 02:06:59,434 INFO L125 PetriNetUnfolderBase]: For 126508/126508 co-relation queries the response was YES. [2024-06-28 02:06:59,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41350 conditions, 7343 events. 4767/7343 cut-off events. For 126508/126508 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 44253 event pairs, 924 based on Foata normal form. 2/7343 useless extension candidates. Maximal degree in co-relation 41265. Up to 6379 conditions per place. [2024-06-28 02:06:59,517 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 227 selfloop transitions, 83 changer transitions 0/317 dead transitions. [2024-06-28 02:06:59,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 317 transitions, 3945 flow [2024-06-28 02:06:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:06:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:06:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-28 02:06:59,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282608695652173 [2024-06-28 02:06:59,529 INFO L175 Difference]: Start difference. First operand has 185 places, 229 transitions, 2704 flow. Second operand 10 states and 243 transitions. [2024-06-28 02:06:59,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 317 transitions, 3945 flow [2024-06-28 02:06:59,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 317 transitions, 3843 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-28 02:06:59,757 INFO L231 Difference]: Finished difference. Result has 194 places, 247 transitions, 3053 flow [2024-06-28 02:06:59,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3053, PETRI_PLACES=194, PETRI_TRANSITIONS=247} [2024-06-28 02:06:59,757 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 144 predicate places. [2024-06-28 02:06:59,758 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 247 transitions, 3053 flow [2024-06-28 02:06:59,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:59,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:59,758 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 02:06:59,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:06:59,758 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:59,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:59,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1604602829, now seen corresponding path program 3 times [2024-06-28 02:06:59,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:59,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935941807] [2024-06-28 02:06:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:59,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:02,371 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 02:07:02,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:02,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935941807] [2024-06-28 02:07:02,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935941807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:02,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:02,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:02,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504697828] [2024-06-28 02:07:02,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:02,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:02,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:02,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:02,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:02,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:07:02,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 247 transitions, 3053 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:02,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:02,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:07:02,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:04,606 INFO L124 PetriNetUnfolderBase]: 4790/7366 cut-off events. [2024-06-28 02:07:04,607 INFO L125 PetriNetUnfolderBase]: For 139732/139732 co-relation queries the response was YES. [2024-06-28 02:07:04,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43571 conditions, 7366 events. 4790/7366 cut-off events. For 139732/139732 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 44369 event pairs, 933 based on Foata normal form. 1/7365 useless extension candidates. Maximal degree in co-relation 43482. Up to 6289 conditions per place. [2024-06-28 02:07:04,674 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 210 selfloop transitions, 89 changer transitions 0/306 dead transitions. [2024-06-28 02:07:04,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 306 transitions, 4101 flow [2024-06-28 02:07:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:07:04,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-28 02:07:04,676 INFO L175 Difference]: Start difference. First operand has 194 places, 247 transitions, 3053 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:07:04,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 306 transitions, 4101 flow [2024-06-28 02:07:04,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 306 transitions, 3912 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:04,947 INFO L231 Difference]: Finished difference. Result has 197 places, 250 transitions, 3092 flow [2024-06-28 02:07:04,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3092, PETRI_PLACES=197, PETRI_TRANSITIONS=250} [2024-06-28 02:07:04,947 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 147 predicate places. [2024-06-28 02:07:04,948 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 250 transitions, 3092 flow [2024-06-28 02:07:04,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:04,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:04,948 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 02:07:04,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:07:04,948 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:04,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:04,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1456992888, now seen corresponding path program 2 times [2024-06-28 02:07:04,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:04,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379178622] [2024-06-28 02:07:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:04,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:07,672 INFO 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 02:07:07,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:07,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379178622] [2024-06-28 02:07:07,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379178622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:07,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:07,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:07,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624189859] [2024-06-28 02:07:07,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:07,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:07,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:07,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:07,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:07,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:07:07,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 250 transitions, 3092 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:07,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:07,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:07:07,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:09,838 INFO L124 PetriNetUnfolderBase]: 4996/7741 cut-off events. [2024-06-28 02:07:09,838 INFO L125 PetriNetUnfolderBase]: For 149730/149730 co-relation queries the response was YES. [2024-06-28 02:07:09,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45584 conditions, 7741 events. 4996/7741 cut-off events. For 149730/149730 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 47305 event pairs, 956 based on Foata normal form. 4/7744 useless extension candidates. Maximal degree in co-relation 45493. Up to 6755 conditions per place. [2024-06-28 02:07:09,924 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 267 selfloop transitions, 66 changer transitions 0/340 dead transitions. [2024-06-28 02:07:09,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 340 transitions, 4412 flow [2024-06-28 02:07:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:07:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:07:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-28 02:07:09,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260869565217391 [2024-06-28 02:07:09,926 INFO L175 Difference]: Start difference. First operand has 197 places, 250 transitions, 3092 flow. Second operand 10 states and 242 transitions. [2024-06-28 02:07:09,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 340 transitions, 4412 flow [2024-06-28 02:07:10,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 340 transitions, 4245 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:10,267 INFO L231 Difference]: Finished difference. Result has 203 places, 272 transitions, 3445 flow [2024-06-28 02:07:10,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3445, PETRI_PLACES=203, PETRI_TRANSITIONS=272} [2024-06-28 02:07:10,269 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 153 predicate places. [2024-06-28 02:07:10,269 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 272 transitions, 3445 flow [2024-06-28 02:07:10,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:10,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:10,269 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 02:07:10,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:07:10,270 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:10,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:10,270 INFO L85 PathProgramCache]: Analyzing trace with hash 448730973, now seen corresponding path program 4 times [2024-06-28 02:07:10,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:10,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344098514] [2024-06-28 02:07:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:10,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:12,992 INFO 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 02:07:12,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:12,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344098514] [2024-06-28 02:07:12,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344098514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:12,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:12,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:12,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101089954] [2024-06-28 02:07:12,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:12,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:12,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:12,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:13,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:07:13,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 272 transitions, 3445 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:13,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:13,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:07:13,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:14,915 INFO L124 PetriNetUnfolderBase]: 5019/7790 cut-off events. [2024-06-28 02:07:14,915 INFO L125 PetriNetUnfolderBase]: For 161743/161743 co-relation queries the response was YES. [2024-06-28 02:07:14,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47221 conditions, 7790 events. 5019/7790 cut-off events. For 161743/161743 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 47800 event pairs, 977 based on Foata normal form. 1/7790 useless extension candidates. Maximal degree in co-relation 47128. Up to 7043 conditions per place. [2024-06-28 02:07:14,996 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 274 selfloop transitions, 45 changer transitions 0/326 dead transitions. [2024-06-28 02:07:14,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 326 transitions, 4387 flow [2024-06-28 02:07:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:07:14,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190217391304348 [2024-06-28 02:07:14,998 INFO L175 Difference]: Start difference. First operand has 203 places, 272 transitions, 3445 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:07:14,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 326 transitions, 4387 flow [2024-06-28 02:07:15,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 326 transitions, 4203 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-28 02:07:15,346 INFO L231 Difference]: Finished difference. Result has 205 places, 275 transitions, 3421 flow [2024-06-28 02:07:15,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3421, PETRI_PLACES=205, PETRI_TRANSITIONS=275} [2024-06-28 02:07:15,347 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 155 predicate places. [2024-06-28 02:07:15,347 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 275 transitions, 3421 flow [2024-06-28 02:07:15,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:15,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:15,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:15,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:07:15,348 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:15,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1325471572, now seen corresponding path program 3 times [2024-06-28 02:07:15,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:15,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248749434] [2024-06-28 02:07:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:15,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:17,982 INFO 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 02:07:17,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:17,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248749434] [2024-06-28 02:07:17,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248749434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:17,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:17,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134059924] [2024-06-28 02:07:17,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:17,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:17,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:17,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:17,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:18,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:07:18,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 275 transitions, 3421 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:18,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:18,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:07:18,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:20,286 INFO L124 PetriNetUnfolderBase]: 5007/7764 cut-off events. [2024-06-28 02:07:20,287 INFO L125 PetriNetUnfolderBase]: For 162006/162006 co-relation queries the response was YES. [2024-06-28 02:07:20,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46727 conditions, 7764 events. 5007/7764 cut-off events. For 162006/162006 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 47531 event pairs, 956 based on Foata normal form. 4/7767 useless extension candidates. Maximal degree in co-relation 46632. Up to 6776 conditions per place. [2024-06-28 02:07:20,354 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 275 selfloop transitions, 67 changer transitions 0/349 dead transitions. [2024-06-28 02:07:20,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 349 transitions, 4392 flow [2024-06-28 02:07:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:07:20,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:07:20,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-28 02:07:20,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177865612648221 [2024-06-28 02:07:20,355 INFO L175 Difference]: Start difference. First operand has 205 places, 275 transitions, 3421 flow. Second operand 11 states and 262 transitions. [2024-06-28 02:07:20,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 349 transitions, 4392 flow [2024-06-28 02:07:20,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 349 transitions, 4211 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-28 02:07:20,673 INFO L231 Difference]: Finished difference. Result has 210 places, 276 transitions, 3407 flow [2024-06-28 02:07:20,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3254, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3407, PETRI_PLACES=210, PETRI_TRANSITIONS=276} [2024-06-28 02:07:20,674 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2024-06-28 02:07:20,674 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 276 transitions, 3407 flow [2024-06-28 02:07:20,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:20,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:20,675 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] [2024-06-28 02:07:20,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:07:20,675 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:20,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:20,675 INFO L85 PathProgramCache]: Analyzing trace with hash 448946640, now seen corresponding path program 1 times [2024-06-28 02:07:20,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:20,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249970217] [2024-06-28 02:07:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:20,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:24,396 INFO 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 02:07:24,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:24,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249970217] [2024-06-28 02:07:24,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249970217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:24,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:24,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:07:24,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103847361] [2024-06-28 02:07:24,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:24,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:07:24,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:07:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:07:24,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-28 02:07:24,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 276 transitions, 3407 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 02:07:24,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:24,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-28 02:07:24,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:26,443 INFO L124 PetriNetUnfolderBase]: 4846/7587 cut-off events. [2024-06-28 02:07:26,444 INFO L125 PetriNetUnfolderBase]: For 172799/172805 co-relation queries the response was YES. [2024-06-28 02:07:26,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45878 conditions, 7587 events. 4846/7587 cut-off events. For 172799/172805 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 47360 event pairs, 902 based on Foata normal form. 16/7558 useless extension candidates. Maximal degree in co-relation 45782. Up to 6372 conditions per place. [2024-06-28 02:07:26,524 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 260 selfloop transitions, 46 changer transitions 0/339 dead transitions. [2024-06-28 02:07:26,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 339 transitions, 4303 flow [2024-06-28 02:07:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:07:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:07:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-28 02:07:26,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-06-28 02:07:26,526 INFO L175 Difference]: Start difference. First operand has 210 places, 276 transitions, 3407 flow. Second operand 9 states and 222 transitions. [2024-06-28 02:07:26,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 339 transitions, 4303 flow [2024-06-28 02:07:26,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 339 transitions, 4147 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-28 02:07:26,843 INFO L231 Difference]: Finished difference. Result has 210 places, 278 transitions, 3400 flow [2024-06-28 02:07:26,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3400, PETRI_PLACES=210, PETRI_TRANSITIONS=278} [2024-06-28 02:07:26,844 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2024-06-28 02:07:26,844 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 278 transitions, 3400 flow [2024-06-28 02:07:26,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 02:07:26,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:26,845 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 02:07:26,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:07:26,845 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:26,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:26,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1438972995, now seen corresponding path program 5 times [2024-06-28 02:07:26,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:26,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282921614] [2024-06-28 02:07:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:26,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:29,302 INFO 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 02:07:29,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:29,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282921614] [2024-06-28 02:07:29,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282921614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:29,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:29,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:29,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34230194] [2024-06-28 02:07:29,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:29,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:29,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:29,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:29,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:29,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:07:29,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 278 transitions, 3400 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:29,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:29,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:07:29,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:31,391 INFO L124 PetriNetUnfolderBase]: 5242/8094 cut-off events. [2024-06-28 02:07:31,391 INFO L125 PetriNetUnfolderBase]: For 176440/176442 co-relation queries the response was YES. [2024-06-28 02:07:31,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49080 conditions, 8094 events. 5242/8094 cut-off events. For 176440/176442 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 49572 event pairs, 1018 based on Foata normal form. 1/8094 useless extension candidates. Maximal degree in co-relation 48983. Up to 6903 conditions per place. [2024-06-28 02:07:31,480 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 233 selfloop transitions, 100 changer transitions 0/340 dead transitions. [2024-06-28 02:07:31,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 340 transitions, 4618 flow [2024-06-28 02:07:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:07:31,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-28 02:07:31,482 INFO L175 Difference]: Start difference. First operand has 210 places, 278 transitions, 3400 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:07:31,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 340 transitions, 4618 flow [2024-06-28 02:07:31,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 340 transitions, 4497 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 02:07:31,807 INFO L231 Difference]: Finished difference. Result has 211 places, 281 transitions, 3541 flow [2024-06-28 02:07:31,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3279, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3541, PETRI_PLACES=211, PETRI_TRANSITIONS=281} [2024-06-28 02:07:31,808 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 161 predicate places. [2024-06-28 02:07:31,808 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 281 transitions, 3541 flow [2024-06-28 02:07:31,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:31,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:31,809 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 02:07:31,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:07:31,809 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:31,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash -694477062, now seen corresponding path program 4 times [2024-06-28 02:07:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:31,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657089540] [2024-06-28 02:07:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:31,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:34,562 INFO 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 02:07:34,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:34,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657089540] [2024-06-28 02:07:34,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657089540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:34,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:34,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:34,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240011295] [2024-06-28 02:07:34,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:34,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:34,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:34,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:34,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:34,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:07:34,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 281 transitions, 3541 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:34,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:34,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:07:34,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:36,916 INFO L124 PetriNetUnfolderBase]: 5288/8169 cut-off events. [2024-06-28 02:07:36,917 INFO L125 PetriNetUnfolderBase]: For 179773/179777 co-relation queries the response was YES. [2024-06-28 02:07:36,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49322 conditions, 8169 events. 5288/8169 cut-off events. For 179773/179777 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 50211 event pairs, 1026 based on Foata normal form. 6/8174 useless extension candidates. Maximal degree in co-relation 49224. Up to 7238 conditions per place. [2024-06-28 02:07:37,017 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 266 selfloop transitions, 75 changer transitions 0/348 dead transitions. [2024-06-28 02:07:37,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 348 transitions, 4669 flow [2024-06-28 02:07:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:07:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:07:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-28 02:07:37,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193236714975845 [2024-06-28 02:07:37,019 INFO L175 Difference]: Start difference. First operand has 211 places, 281 transitions, 3541 flow. Second operand 9 states and 215 transitions. [2024-06-28 02:07:37,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 348 transitions, 4669 flow [2024-06-28 02:07:37,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 348 transitions, 4399 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 02:07:37,361 INFO L231 Difference]: Finished difference. Result has 214 places, 286 transitions, 3491 flow [2024-06-28 02:07:37,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3491, PETRI_PLACES=214, PETRI_TRANSITIONS=286} [2024-06-28 02:07:37,361 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 164 predicate places. [2024-06-28 02:07:37,362 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 286 transitions, 3491 flow [2024-06-28 02:07:37,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:37,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:37,362 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 02:07:37,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:07:37,362 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:37,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash -939905313, now seen corresponding path program 6 times [2024-06-28 02:07:37,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:37,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676242009] [2024-06-28 02:07:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:37,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:39,608 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 02:07:39,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:39,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676242009] [2024-06-28 02:07:39,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676242009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:39,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:39,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:39,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727845412] [2024-06-28 02:07:39,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:39,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:39,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:39,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:07:39,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 286 transitions, 3491 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:39,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:39,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:07:39,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:41,657 INFO L124 PetriNetUnfolderBase]: 5311/8209 cut-off events. [2024-06-28 02:07:41,657 INFO L125 PetriNetUnfolderBase]: For 180084/180086 co-relation queries the response was YES. [2024-06-28 02:07:41,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49370 conditions, 8209 events. 5311/8209 cut-off events. For 180084/180086 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 50493 event pairs, 1041 based on Foata normal form. 1/8209 useless extension candidates. Maximal degree in co-relation 49271. Up to 6989 conditions per place. [2024-06-28 02:07:41,738 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 237 selfloop transitions, 101 changer transitions 0/345 dead transitions. [2024-06-28 02:07:41,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 345 transitions, 4707 flow [2024-06-28 02:07:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-28 02:07:41,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5353260869565217 [2024-06-28 02:07:41,739 INFO L175 Difference]: Start difference. First operand has 214 places, 286 transitions, 3491 flow. Second operand 8 states and 197 transitions. [2024-06-28 02:07:41,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 345 transitions, 4707 flow [2024-06-28 02:07:42,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 345 transitions, 4589 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:42,114 INFO L231 Difference]: Finished difference. Result has 217 places, 289 transitions, 3625 flow [2024-06-28 02:07:42,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3625, PETRI_PLACES=217, PETRI_TRANSITIONS=289} [2024-06-28 02:07:42,114 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 167 predicate places. [2024-06-28 02:07:42,114 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 289 transitions, 3625 flow [2024-06-28 02:07:42,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:42,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:42,115 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 02:07:42,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:07:42,116 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:42,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash 655186236, now seen corresponding path program 5 times [2024-06-28 02:07:42,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:42,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945644357] [2024-06-28 02:07:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:42,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:44,638 INFO 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 02:07:44,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:44,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945644357] [2024-06-28 02:07:44,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945644357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:44,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:44,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:44,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735850988] [2024-06-28 02:07:44,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:44,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:44,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:44,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:44,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:44,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:07:44,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 289 transitions, 3625 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:44,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:44,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:07:44,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:46,860 INFO L124 PetriNetUnfolderBase]: 5429/8406 cut-off events. [2024-06-28 02:07:46,860 INFO L125 PetriNetUnfolderBase]: For 191042/191046 co-relation queries the response was YES. [2024-06-28 02:07:46,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51234 conditions, 8406 events. 5429/8406 cut-off events. For 191042/191046 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 51821 event pairs, 1021 based on Foata normal form. 6/8411 useless extension candidates. Maximal degree in co-relation 51133. Up to 6910 conditions per place. [2024-06-28 02:07:46,947 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 250 selfloop transitions, 106 changer transitions 0/363 dead transitions. [2024-06-28 02:07:46,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 363 transitions, 5096 flow [2024-06-28 02:07:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-28 02:07:46,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-06-28 02:07:46,950 INFO L175 Difference]: Start difference. First operand has 217 places, 289 transitions, 3625 flow. Second operand 8 states and 196 transitions. [2024-06-28 02:07:46,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 363 transitions, 5096 flow [2024-06-28 02:07:47,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 363 transitions, 4898 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:47,383 INFO L231 Difference]: Finished difference. Result has 222 places, 307 transitions, 3967 flow [2024-06-28 02:07:47,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3427, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3967, PETRI_PLACES=222, PETRI_TRANSITIONS=307} [2024-06-28 02:07:47,383 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 172 predicate places. [2024-06-28 02:07:47,383 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 307 transitions, 3967 flow [2024-06-28 02:07:47,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:47,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:47,384 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 02:07:47,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:07:47,384 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:47,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:47,384 INFO L85 PathProgramCache]: Analyzing trace with hash -949438286, now seen corresponding path program 6 times [2024-06-28 02:07:47,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:47,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787214642] [2024-06-28 02:07:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:47,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:49,776 INFO 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 02:07:49,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:49,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787214642] [2024-06-28 02:07:49,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787214642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:49,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:49,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56893989] [2024-06-28 02:07:49,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:49,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:49,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:49,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:07:49,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 307 transitions, 3967 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:49,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:49,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:07:49,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:51,886 INFO L124 PetriNetUnfolderBase]: 5423/8372 cut-off events. [2024-06-28 02:07:51,887 INFO L125 PetriNetUnfolderBase]: For 198919/198923 co-relation queries the response was YES. [2024-06-28 02:07:51,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52603 conditions, 8372 events. 5423/8372 cut-off events. For 198919/198923 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 51481 event pairs, 1024 based on Foata normal form. 6/8377 useless extension candidates. Maximal degree in co-relation 52499. Up to 7460 conditions per place. [2024-06-28 02:07:51,997 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 278 selfloop transitions, 72 changer transitions 0/357 dead transitions. [2024-06-28 02:07:51,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 357 transitions, 4943 flow [2024-06-28 02:07:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-28 02:07:51,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2024-06-28 02:07:51,999 INFO L175 Difference]: Start difference. First operand has 222 places, 307 transitions, 3967 flow. Second operand 8 states and 188 transitions. [2024-06-28 02:07:51,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 357 transitions, 4943 flow [2024-06-28 02:07:52,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 357 transitions, 4821 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-28 02:07:52,603 INFO L231 Difference]: Finished difference. Result has 228 places, 308 transitions, 4017 flow [2024-06-28 02:07:52,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4017, PETRI_PLACES=228, PETRI_TRANSITIONS=308} [2024-06-28 02:07:52,604 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 178 predicate places. [2024-06-28 02:07:52,604 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 308 transitions, 4017 flow [2024-06-28 02:07:52,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:52,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:52,604 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 02:07:52,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:07:52,605 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:52,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:52,605 INFO L85 PathProgramCache]: Analyzing trace with hash -949438627, now seen corresponding path program 7 times [2024-06-28 02:07:52,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:52,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017200403] [2024-06-28 02:07:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:52,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:55,438 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 02:07:55,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:55,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017200403] [2024-06-28 02:07:55,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017200403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:55,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:55,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:55,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496759927] [2024-06-28 02:07:55,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:55,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:55,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:55,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:07:55,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 308 transitions, 4017 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:55,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:55,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:07:55,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:57,799 INFO L124 PetriNetUnfolderBase]: 5446/8366 cut-off events. [2024-06-28 02:07:57,799 INFO L125 PetriNetUnfolderBase]: For 202240/202242 co-relation queries the response was YES. [2024-06-28 02:07:57,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52805 conditions, 8366 events. 5446/8366 cut-off events. For 202240/202242 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 51185 event pairs, 1019 based on Foata normal form. 1/8366 useless extension candidates. Maximal degree in co-relation 52698. Up to 7165 conditions per place. [2024-06-28 02:07:57,895 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 246 selfloop transitions, 107 changer transitions 0/360 dead transitions. [2024-06-28 02:07:57,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 360 transitions, 5154 flow [2024-06-28 02:07:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:07:57,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190217391304348 [2024-06-28 02:07:57,897 INFO L175 Difference]: Start difference. First operand has 228 places, 308 transitions, 4017 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:07:57,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 360 transitions, 5154 flow [2024-06-28 02:07:58,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 360 transitions, 4999 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 02:07:58,322 INFO L231 Difference]: Finished difference. Result has 230 places, 311 transitions, 4129 flow [2024-06-28 02:07:58,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3862, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4129, PETRI_PLACES=230, PETRI_TRANSITIONS=311} [2024-06-28 02:07:58,323 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 180 predicate places. [2024-06-28 02:07:58,323 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 311 transitions, 4129 flow [2024-06-28 02:07:58,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:58,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:58,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:58,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:07:58,324 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:58,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:58,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1149752588, now seen corresponding path program 7 times [2024-06-28 02:07:58,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:58,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380699481] [2024-06-28 02:07:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:58,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:00,743 INFO 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 02:08:00,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:00,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380699481] [2024-06-28 02:08:00,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380699481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:00,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:00,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:00,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503198622] [2024-06-28 02:08:00,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:00,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:00,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:00,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:00,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:00,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:08:00,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 311 transitions, 4129 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:00,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:00,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:08:00,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:03,134 INFO L124 PetriNetUnfolderBase]: 5710/8782 cut-off events. [2024-06-28 02:08:03,135 INFO L125 PetriNetUnfolderBase]: For 227334/227336 co-relation queries the response was YES. [2024-06-28 02:08:03,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56408 conditions, 8782 events. 5710/8782 cut-off events. For 227334/227336 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 53983 event pairs, 983 based on Foata normal form. 2/8783 useless extension candidates. Maximal degree in co-relation 56300. Up to 7019 conditions per place. [2024-06-28 02:08:03,249 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 249 selfloop transitions, 134 changer transitions 0/390 dead transitions. [2024-06-28 02:08:03,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 390 transitions, 5775 flow [2024-06-28 02:08:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:08:03,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:08:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-28 02:08:03,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.533816425120773 [2024-06-28 02:08:03,251 INFO L175 Difference]: Start difference. First operand has 230 places, 311 transitions, 4129 flow. Second operand 9 states and 221 transitions. [2024-06-28 02:08:03,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 390 transitions, 5775 flow [2024-06-28 02:08:03,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 390 transitions, 5595 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 02:08:03,770 INFO L231 Difference]: Finished difference. Result has 235 places, 327 transitions, 4549 flow [2024-06-28 02:08:03,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3949, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4549, PETRI_PLACES=235, PETRI_TRANSITIONS=327} [2024-06-28 02:08:03,771 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 185 predicate places. [2024-06-28 02:08:03,771 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 327 transitions, 4549 flow [2024-06-28 02:08:03,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:03,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:03,772 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] [2024-06-28 02:08:03,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:08:03,772 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:03,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:03,772 INFO L85 PathProgramCache]: Analyzing trace with hash 950450798, now seen corresponding path program 8 times [2024-06-28 02:08:03,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:03,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974031174] [2024-06-28 02:08:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:03,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:06,115 INFO 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 02:08:06,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974031174] [2024-06-28 02:08:06,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974031174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:06,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:06,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:06,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498807943] [2024-06-28 02:08:06,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:06,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:06,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:06,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:08:06,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 327 transitions, 4549 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:06,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:06,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:08:06,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:08,406 INFO L124 PetriNetUnfolderBase]: 5714/8804 cut-off events. [2024-06-28 02:08:08,406 INFO L125 PetriNetUnfolderBase]: For 241609/241611 co-relation queries the response was YES. [2024-06-28 02:08:08,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58147 conditions, 8804 events. 5714/8804 cut-off events. For 241609/241611 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 54294 event pairs, 1053 based on Foata normal form. 2/8805 useless extension candidates. Maximal degree in co-relation 58037. Up to 7024 conditions per place. [2024-06-28 02:08:08,504 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 241 selfloop transitions, 131 changer transitions 0/379 dead transitions. [2024-06-28 02:08:08,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 379 transitions, 5854 flow [2024-06-28 02:08:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:08:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:08:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:08:08,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-06-28 02:08:08,506 INFO L175 Difference]: Start difference. First operand has 235 places, 327 transitions, 4549 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:08:08,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 379 transitions, 5854 flow [2024-06-28 02:08:09,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 379 transitions, 5628 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-28 02:08:09,077 INFO L231 Difference]: Finished difference. Result has 239 places, 331 transitions, 4715 flow [2024-06-28 02:08:09,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4335, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4715, PETRI_PLACES=239, PETRI_TRANSITIONS=331} [2024-06-28 02:08:09,078 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 189 predicate places. [2024-06-28 02:08:09,078 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 331 transitions, 4715 flow [2024-06-28 02:08:09,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:09,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:09,078 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 02:08:09,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:08:09,079 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:09,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:09,079 INFO L85 PathProgramCache]: Analyzing trace with hash 783865478, now seen corresponding path program 9 times [2024-06-28 02:08:09,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:09,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661041157] [2024-06-28 02:08:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:09,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:11,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:11,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661041157] [2024-06-28 02:08:11,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661041157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:11,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:11,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:11,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389423861] [2024-06-28 02:08:11,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:11,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:11,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:11,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:08:11,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 331 transitions, 4715 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:11,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:11,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:08:11,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:14,077 INFO L124 PetriNetUnfolderBase]: 5764/8880 cut-off events. [2024-06-28 02:08:14,077 INFO L125 PetriNetUnfolderBase]: For 239027/239029 co-relation queries the response was YES. [2024-06-28 02:08:14,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58726 conditions, 8880 events. 5764/8880 cut-off events. For 239027/239029 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 54947 event pairs, 960 based on Foata normal form. 4/8883 useless extension candidates. Maximal degree in co-relation 58613. Up to 7069 conditions per place. [2024-06-28 02:08:14,171 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 251 selfloop transitions, 147 changer transitions 0/405 dead transitions. [2024-06-28 02:08:14,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 405 transitions, 6096 flow [2024-06-28 02:08:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:08:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:08:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-28 02:08:14,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260869565217391 [2024-06-28 02:08:14,172 INFO L175 Difference]: Start difference. First operand has 239 places, 331 transitions, 4715 flow. Second operand 10 states and 242 transitions. [2024-06-28 02:08:14,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 405 transitions, 6096 flow [2024-06-28 02:08:14,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 405 transitions, 5794 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 02:08:14,819 INFO L231 Difference]: Finished difference. Result has 244 places, 337 transitions, 4829 flow [2024-06-28 02:08:14,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4829, PETRI_PLACES=244, PETRI_TRANSITIONS=337} [2024-06-28 02:08:14,820 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-06-28 02:08:14,820 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 337 transitions, 4829 flow [2024-06-28 02:08:14,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:14,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:14,821 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 02:08:14,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:08:14,821 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:14,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:14,821 INFO L85 PathProgramCache]: Analyzing trace with hash -978533751, now seen corresponding path program 8 times [2024-06-28 02:08:14,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:14,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87078966] [2024-06-28 02:08:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:14,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:17,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:17,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87078966] [2024-06-28 02:08:17,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87078966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:17,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:17,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:17,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438995719] [2024-06-28 02:08:17,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:17,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:17,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:17,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:17,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:17,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:08:17,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 337 transitions, 4829 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:17,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:17,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:08:17,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:19,602 INFO L124 PetriNetUnfolderBase]: 5761/8913 cut-off events. [2024-06-28 02:08:19,602 INFO L125 PetriNetUnfolderBase]: For 238249/238251 co-relation queries the response was YES. [2024-06-28 02:08:19,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58774 conditions, 8913 events. 5761/8913 cut-off events. For 238249/238251 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 55492 event pairs, 1093 based on Foata normal form. 1/8913 useless extension candidates. Maximal degree in co-relation 58660. Up to 7766 conditions per place. [2024-06-28 02:08:19,729 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 298 selfloop transitions, 83 changer transitions 0/388 dead transitions. [2024-06-28 02:08:19,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 388 transitions, 5967 flow [2024-06-28 02:08:19,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:08:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:08:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 02:08:19,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527950310559007 [2024-06-28 02:08:19,731 INFO L175 Difference]: Start difference. First operand has 244 places, 337 transitions, 4829 flow. Second operand 7 states and 178 transitions. [2024-06-28 02:08:19,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 388 transitions, 5967 flow [2024-06-28 02:08:20,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 388 transitions, 5682 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-28 02:08:20,356 INFO L231 Difference]: Finished difference. Result has 244 places, 337 transitions, 4721 flow [2024-06-28 02:08:20,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4544, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4721, PETRI_PLACES=244, PETRI_TRANSITIONS=337} [2024-06-28 02:08:20,356 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-06-28 02:08:20,357 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 337 transitions, 4721 flow [2024-06-28 02:08:20,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:20,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:20,357 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 02:08:20,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:08:20,357 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:20,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:20,360 INFO L85 PathProgramCache]: Analyzing trace with hash 950064848, now seen corresponding path program 10 times [2024-06-28 02:08:20,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:20,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525234899] [2024-06-28 02:08:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:20,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:22,919 INFO 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 02:08:22,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525234899] [2024-06-28 02:08:22,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525234899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:22,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:22,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:22,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040866043] [2024-06-28 02:08:22,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:22,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:22,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:22,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:22,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:22,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:08:22,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 337 transitions, 4721 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:22,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:22,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:08:22,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:25,107 INFO L124 PetriNetUnfolderBase]: 5755/8909 cut-off events. [2024-06-28 02:08:25,107 INFO L125 PetriNetUnfolderBase]: For 239138/239140 co-relation queries the response was YES. [2024-06-28 02:08:25,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57791 conditions, 8909 events. 5755/8909 cut-off events. For 239138/239140 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 55541 event pairs, 1094 based on Foata normal form. 2/8910 useless extension candidates. Maximal degree in co-relation 57676. Up to 7856 conditions per place. [2024-06-28 02:08:25,217 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 298 selfloop transitions, 78 changer transitions 0/383 dead transitions. [2024-06-28 02:08:25,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 383 transitions, 5697 flow [2024-06-28 02:08:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:08:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:08:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:08:25,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372670807453416 [2024-06-28 02:08:25,219 INFO L175 Difference]: Start difference. First operand has 244 places, 337 transitions, 4721 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:08:25,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 383 transitions, 5697 flow [2024-06-28 02:08:25,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 383 transitions, 5403 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-28 02:08:25,843 INFO L231 Difference]: Finished difference. Result has 242 places, 337 transitions, 4590 flow [2024-06-28 02:08:25,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4427, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4590, PETRI_PLACES=242, PETRI_TRANSITIONS=337} [2024-06-28 02:08:25,843 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 192 predicate places. [2024-06-28 02:08:25,844 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 337 transitions, 4590 flow [2024-06-28 02:08:25,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:25,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:25,844 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 02:08:25,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:08:25,844 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:25,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:25,845 INFO L85 PathProgramCache]: Analyzing trace with hash -945202988, now seen corresponding path program 11 times [2024-06-28 02:08:25,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:25,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218299689] [2024-06-28 02:08:25,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:25,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:28,499 INFO 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 02:08:28,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:28,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218299689] [2024-06-28 02:08:28,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218299689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:28,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:28,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:28,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882075009] [2024-06-28 02:08:28,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:28,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:28,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:28,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:28,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:28,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:08:28,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 337 transitions, 4590 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:28,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:28,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:08:28,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:31,009 INFO L124 PetriNetUnfolderBase]: 5943/9210 cut-off events. [2024-06-28 02:08:31,009 INFO L125 PetriNetUnfolderBase]: For 235854/235854 co-relation queries the response was YES. [2024-06-28 02:08:31,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59216 conditions, 9210 events. 5943/9210 cut-off events. For 235854/235854 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 57865 event pairs, 1021 based on Foata normal form. 4/9213 useless extension candidates. Maximal degree in co-relation 59101. Up to 7732 conditions per place. [2024-06-28 02:08:31,132 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 287 selfloop transitions, 129 changer transitions 0/423 dead transitions. [2024-06-28 02:08:31,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 423 transitions, 6095 flow [2024-06-28 02:08:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:08:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:08:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-28 02:08:31,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483091787439613 [2024-06-28 02:08:31,134 INFO L175 Difference]: Start difference. First operand has 242 places, 337 transitions, 4590 flow. Second operand 9 states and 227 transitions. [2024-06-28 02:08:31,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 423 transitions, 6095 flow [2024-06-28 02:08:31,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 423 transitions, 5932 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 02:08:31,739 INFO L231 Difference]: Finished difference. Result has 246 places, 358 transitions, 5124 flow [2024-06-28 02:08:31,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4427, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5124, PETRI_PLACES=246, PETRI_TRANSITIONS=358} [2024-06-28 02:08:31,741 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 196 predicate places. [2024-06-28 02:08:31,741 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 358 transitions, 5124 flow [2024-06-28 02:08:31,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:31,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:31,741 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 02:08:31,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:08:31,742 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:31,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:31,742 INFO L85 PathProgramCache]: Analyzing trace with hash -945410378, now seen corresponding path program 12 times [2024-06-28 02:08:31,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:31,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545870860] [2024-06-28 02:08:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:31,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:34,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:34,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545870860] [2024-06-28 02:08:34,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545870860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:34,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:34,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:34,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685917184] [2024-06-28 02:08:34,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:34,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:34,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:34,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:34,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:08:34,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 358 transitions, 5124 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:34,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:34,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:08:34,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:37,131 INFO L124 PetriNetUnfolderBase]: 5931/9194 cut-off events. [2024-06-28 02:08:37,131 INFO L125 PetriNetUnfolderBase]: For 244256/244256 co-relation queries the response was YES. [2024-06-28 02:08:37,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60614 conditions, 9194 events. 5931/9194 cut-off events. For 244256/244256 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 57776 event pairs, 1019 based on Foata normal form. 4/9197 useless extension candidates. Maximal degree in co-relation 60497. Up to 7722 conditions per place. [2024-06-28 02:08:37,255 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 305 selfloop transitions, 129 changer transitions 0/441 dead transitions. [2024-06-28 02:08:37,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 441 transitions, 6320 flow [2024-06-28 02:08:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:08:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:08:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 275 transitions. [2024-06-28 02:08:37,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-28 02:08:37,257 INFO L175 Difference]: Start difference. First operand has 246 places, 358 transitions, 5124 flow. Second operand 11 states and 275 transitions. [2024-06-28 02:08:37,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 441 transitions, 6320 flow [2024-06-28 02:08:38,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 441 transitions, 5956 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-28 02:08:38,112 INFO L231 Difference]: Finished difference. Result has 251 places, 358 transitions, 5042 flow [2024-06-28 02:08:38,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4760, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5042, PETRI_PLACES=251, PETRI_TRANSITIONS=358} [2024-06-28 02:08:38,113 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 201 predicate places. [2024-06-28 02:08:38,113 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 358 transitions, 5042 flow [2024-06-28 02:08:38,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:38,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:38,114 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 02:08:38,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:08:38,114 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:38,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash 772932987, now seen corresponding path program 9 times [2024-06-28 02:08:38,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:38,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343232487] [2024-06-28 02:08:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:38,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:40,953 INFO 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 02:08:40,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:40,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343232487] [2024-06-28 02:08:40,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343232487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:40,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:40,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:40,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314859702] [2024-06-28 02:08:40,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:40,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:40,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:40,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:40,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:40,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:08:40,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 358 transitions, 5042 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:40,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:40,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:08:40,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:43,712 INFO L124 PetriNetUnfolderBase]: 5928/9224 cut-off events. [2024-06-28 02:08:43,712 INFO L125 PetriNetUnfolderBase]: For 240721/240721 co-relation queries the response was YES. [2024-06-28 02:08:43,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60306 conditions, 9224 events. 5928/9224 cut-off events. For 240721/240721 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 58287 event pairs, 1085 based on Foata normal form. 1/9224 useless extension candidates. Maximal degree in co-relation 60188. Up to 7993 conditions per place. [2024-06-28 02:08:43,825 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 335 selfloop transitions, 90 changer transitions 0/432 dead transitions. [2024-06-28 02:08:43,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 432 transitions, 6240 flow [2024-06-28 02:08:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:08:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:08:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-28 02:08:43,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5603864734299517 [2024-06-28 02:08:43,832 INFO L175 Difference]: Start difference. First operand has 251 places, 358 transitions, 5042 flow. Second operand 9 states and 232 transitions. [2024-06-28 02:08:43,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 432 transitions, 6240 flow [2024-06-28 02:08:44,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 432 transitions, 5934 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-28 02:08:44,595 INFO L231 Difference]: Finished difference. Result has 251 places, 358 transitions, 4933 flow [2024-06-28 02:08:44,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4736, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4933, PETRI_PLACES=251, PETRI_TRANSITIONS=358} [2024-06-28 02:08:44,595 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 201 predicate places. [2024-06-28 02:08:44,596 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 358 transitions, 4933 flow [2024-06-28 02:08:44,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:44,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:44,596 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 02:08:44,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:08:44,596 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:44,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:44,597 INFO L85 PathProgramCache]: Analyzing trace with hash 773148654, now seen corresponding path program 2 times [2024-06-28 02:08:44,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:44,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623230518] [2024-06-28 02:08:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:44,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:47,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:47,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623230518] [2024-06-28 02:08:47,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623230518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:47,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:47,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:08:47,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678175101] [2024-06-28 02:08:47,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:47,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:08:47,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:47,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:08:47,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:08:47,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-28 02:08:47,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 358 transitions, 4933 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 02:08:47,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:47,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-28 02:08:47,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:49,847 INFO L124 PetriNetUnfolderBase]: 5698/8901 cut-off events. [2024-06-28 02:08:49,848 INFO L125 PetriNetUnfolderBase]: For 261061/261103 co-relation queries the response was YES. [2024-06-28 02:08:49,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58162 conditions, 8901 events. 5698/8901 cut-off events. For 261061/261103 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 56879 event pairs, 980 based on Foata normal form. 50/8887 useless extension candidates. Maximal degree in co-relation 58043. Up to 7220 conditions per place. [2024-06-28 02:08:49,957 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 309 selfloop transitions, 53 changer transitions 0/407 dead transitions. [2024-06-28 02:08:49,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 407 transitions, 5895 flow [2024-06-28 02:08:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:08:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:08:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:08:49,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-06-28 02:08:49,959 INFO L175 Difference]: Start difference. First operand has 251 places, 358 transitions, 4933 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:08:49,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 407 transitions, 5895 flow [2024-06-28 02:08:50,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 407 transitions, 5661 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-28 02:08:50,513 INFO L231 Difference]: Finished difference. Result has 248 places, 360 transitions, 4879 flow [2024-06-28 02:08:50,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4879, PETRI_PLACES=248, PETRI_TRANSITIONS=360} [2024-06-28 02:08:50,514 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 198 predicate places. [2024-06-28 02:08:50,514 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 360 transitions, 4879 flow [2024-06-28 02:08:50,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 02:08:50,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:50,515 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 02:08:50,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:08:50,515 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:50,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1156933614, now seen corresponding path program 3 times [2024-06-28 02:08:50,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:50,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998128947] [2024-06-28 02:08:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:50,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:53,591 INFO 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 02:08:53,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:53,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998128947] [2024-06-28 02:08:53,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998128947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:53,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:53,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:08:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694284977] [2024-06-28 02:08:53,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:53,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:08:53,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:53,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:08:53,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:08:53,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-28 02:08:53,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 360 transitions, 4879 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 02:08:53,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:53,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-28 02:08:53,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:55,803 INFO L124 PetriNetUnfolderBase]: 5887/9226 cut-off events. [2024-06-28 02:08:55,803 INFO L125 PetriNetUnfolderBase]: For 264892/264919 co-relation queries the response was YES. [2024-06-28 02:08:55,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60167 conditions, 9226 events. 5887/9226 cut-off events. For 264892/264919 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 59404 event pairs, 980 based on Foata normal form. 16/9149 useless extension candidates. Maximal degree in co-relation 60048. Up to 7645 conditions per place. [2024-06-28 02:08:55,923 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 305 selfloop transitions, 54 changer transitions 0/404 dead transitions. [2024-06-28 02:08:55,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 404 transitions, 5863 flow [2024-06-28 02:08:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:08:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:08:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 02:08:55,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531055900621118 [2024-06-28 02:08:55,925 INFO L175 Difference]: Start difference. First operand has 248 places, 360 transitions, 4879 flow. Second operand 7 states and 171 transitions. [2024-06-28 02:08:55,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 404 transitions, 5863 flow [2024-06-28 02:08:56,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 404 transitions, 5719 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 02:08:56,655 INFO L231 Difference]: Finished difference. Result has 250 places, 361 transitions, 4875 flow [2024-06-28 02:08:56,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4743, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4875, PETRI_PLACES=250, PETRI_TRANSITIONS=361} [2024-06-28 02:08:56,657 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 200 predicate places. [2024-06-28 02:08:56,657 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 361 transitions, 4875 flow [2024-06-28 02:08:56,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 02:08:56,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:56,658 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 02:08:56,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 02:08:56,666 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:56,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:56,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1157379084, now seen corresponding path program 4 times [2024-06-28 02:08:56,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:56,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246899907] [2024-06-28 02:08:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:56,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:59,903 INFO 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 02:08:59,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:59,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246899907] [2024-06-28 02:08:59,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246899907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:59,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:59,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:08:59,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838142651] [2024-06-28 02:08:59,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:59,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:08:59,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:59,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:08:59,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:08:59,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-06-28 02:08:59,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 361 transitions, 4875 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 02:08:59,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:59,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-06-28 02:08:59,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:02,081 INFO L124 PetriNetUnfolderBase]: 5974/9388 cut-off events. [2024-06-28 02:09:02,081 INFO L125 PetriNetUnfolderBase]: For 247211/247244 co-relation queries the response was YES. [2024-06-28 02:09:02,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60065 conditions, 9388 events. 5974/9388 cut-off events. For 247211/247244 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 60587 event pairs, 1002 based on Foata normal form. 12/9301 useless extension candidates. Maximal degree in co-relation 59945. Up to 7086 conditions per place. [2024-06-28 02:09:02,208 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 306 selfloop transitions, 59 changer transitions 0/410 dead transitions. [2024-06-28 02:09:02,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 410 transitions, 5971 flow [2024-06-28 02:09:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:09:02,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2024-06-28 02:09:02,209 INFO L175 Difference]: Start difference. First operand has 250 places, 361 transitions, 4875 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:09:02,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 410 transitions, 5971 flow [2024-06-28 02:09:02,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 410 transitions, 5863 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 02:09:02,895 INFO L231 Difference]: Finished difference. Result has 253 places, 364 transitions, 4986 flow [2024-06-28 02:09:02,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4767, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4986, PETRI_PLACES=253, PETRI_TRANSITIONS=364} [2024-06-28 02:09:02,896 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 203 predicate places. [2024-06-28 02:09:02,896 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 364 transitions, 4986 flow [2024-06-28 02:09:02,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 02:09:02,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:02,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:02,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 02:09:02,896 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:02,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 566480542, now seen corresponding path program 1 times [2024-06-28 02:09:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:02,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644427160] [2024-06-28 02:09:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:02,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:04,898 INFO 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 02:09:04,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:04,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644427160] [2024-06-28 02:09:04,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644427160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:04,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:04,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:04,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761732462] [2024-06-28 02:09:04,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:04,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:04,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:04,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:04,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:04,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:09:04,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 364 transitions, 4986 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:04,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:04,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:09:04,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:07,409 INFO L124 PetriNetUnfolderBase]: 6645/10493 cut-off events. [2024-06-28 02:09:07,410 INFO L125 PetriNetUnfolderBase]: For 288627/288627 co-relation queries the response was YES. [2024-06-28 02:09:07,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67762 conditions, 10493 events. 6645/10493 cut-off events. For 288627/288627 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 68520 event pairs, 1462 based on Foata normal form. 8/10499 useless extension candidates. Maximal degree in co-relation 67640. Up to 8979 conditions per place. [2024-06-28 02:09:07,546 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 367 selfloop transitions, 47 changer transitions 0/421 dead transitions. [2024-06-28 02:09:07,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 421 transitions, 6250 flow [2024-06-28 02:09:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:09:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:09:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-28 02:09:07,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529891304347826 [2024-06-28 02:09:07,548 INFO L175 Difference]: Start difference. First operand has 253 places, 364 transitions, 4986 flow. Second operand 8 states and 195 transitions. [2024-06-28 02:09:07,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 421 transitions, 6250 flow [2024-06-28 02:09:08,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 421 transitions, 6168 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 02:09:08,304 INFO L231 Difference]: Finished difference. Result has 258 places, 368 transitions, 5151 flow [2024-06-28 02:09:08,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4904, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5151, PETRI_PLACES=258, PETRI_TRANSITIONS=368} [2024-06-28 02:09:08,305 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 208 predicate places. [2024-06-28 02:09:08,305 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 368 transitions, 5151 flow [2024-06-28 02:09:08,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:08,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:08,305 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 02:09:08,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 02:09:08,305 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:08,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:08,305 INFO L85 PathProgramCache]: Analyzing trace with hash -949044400, now seen corresponding path program 2 times [2024-06-28 02:09:08,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:08,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900369578] [2024-06-28 02:09:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:08,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:10,351 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 02:09:10,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:10,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900369578] [2024-06-28 02:09:10,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900369578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:10,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:10,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:10,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160021588] [2024-06-28 02:09:10,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:10,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:10,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:10,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:10,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:09:10,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 368 transitions, 5151 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:10,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:10,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:09:10,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:13,167 INFO L124 PetriNetUnfolderBase]: 6783/10700 cut-off events. [2024-06-28 02:09:13,167 INFO L125 PetriNetUnfolderBase]: For 309255/309255 co-relation queries the response was YES. [2024-06-28 02:09:13,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70142 conditions, 10700 events. 6783/10700 cut-off events. For 309255/309255 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 70028 event pairs, 1584 based on Foata normal form. 10/10708 useless extension candidates. Maximal degree in co-relation 70018. Up to 9482 conditions per place. [2024-06-28 02:09:13,299 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 370 selfloop transitions, 37 changer transitions 0/414 dead transitions. [2024-06-28 02:09:13,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 414 transitions, 6185 flow [2024-06-28 02:09:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:09:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:09:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-28 02:09:13,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081521739130435 [2024-06-28 02:09:13,300 INFO L175 Difference]: Start difference. First operand has 258 places, 368 transitions, 5151 flow. Second operand 8 states and 187 transitions. [2024-06-28 02:09:13,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 414 transitions, 6185 flow [2024-06-28 02:09:14,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 414 transitions, 6036 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-28 02:09:14,231 INFO L231 Difference]: Finished difference. Result has 262 places, 370 transitions, 5162 flow [2024-06-28 02:09:14,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5026, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5162, PETRI_PLACES=262, PETRI_TRANSITIONS=370} [2024-06-28 02:09:14,231 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 212 predicate places. [2024-06-28 02:09:14,231 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 370 transitions, 5162 flow [2024-06-28 02:09:14,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:14,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:14,232 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 02:09:14,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 02:09:14,232 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:14,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash 655046302, now seen corresponding path program 3 times [2024-06-28 02:09:14,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:14,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656745147] [2024-06-28 02:09:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:14,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:16,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:16,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656745147] [2024-06-28 02:09:16,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656745147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:16,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:16,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:16,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857552025] [2024-06-28 02:09:16,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:16,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:16,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:16,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:16,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:09:16,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 370 transitions, 5162 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:16,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:16,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:09:16,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:19,080 INFO L124 PetriNetUnfolderBase]: 6891/10856 cut-off events. [2024-06-28 02:09:19,080 INFO L125 PetriNetUnfolderBase]: For 296049/296049 co-relation queries the response was YES. [2024-06-28 02:09:19,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69861 conditions, 10856 events. 6891/10856 cut-off events. For 296049/296049 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 70990 event pairs, 1570 based on Foata normal form. 8/10862 useless extension candidates. Maximal degree in co-relation 69735. Up to 9504 conditions per place. [2024-06-28 02:09:19,200 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 372 selfloop transitions, 41 changer transitions 0/420 dead transitions. [2024-06-28 02:09:19,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 420 transitions, 6208 flow [2024-06-28 02:09:19,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:09:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:09:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:09:19,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190217391304348 [2024-06-28 02:09:19,202 INFO L175 Difference]: Start difference. First operand has 262 places, 370 transitions, 5162 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:09:19,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 420 transitions, 6208 flow [2024-06-28 02:09:20,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 420 transitions, 6110 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 02:09:20,098 INFO L231 Difference]: Finished difference. Result has 264 places, 372 transitions, 5211 flow [2024-06-28 02:09:20,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5211, PETRI_PLACES=264, PETRI_TRANSITIONS=372} [2024-06-28 02:09:20,098 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 214 predicate places. [2024-06-28 02:09:20,098 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 372 transitions, 5211 flow [2024-06-28 02:09:20,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:20,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:20,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:20,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 02:09:20,099 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:20,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:20,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1149760524, now seen corresponding path program 4 times [2024-06-28 02:09:20,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:20,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953010324] [2024-06-28 02:09:20,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:20,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:22,123 INFO 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 02:09:22,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953010324] [2024-06-28 02:09:22,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953010324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:22,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:22,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:22,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287569729] [2024-06-28 02:09:22,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:22,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:22,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:22,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:22,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:22,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:09:22,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 372 transitions, 5211 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:22,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:22,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:09:22,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:24,886 INFO L124 PetriNetUnfolderBase]: 7029/11058 cut-off events. [2024-06-28 02:09:24,886 INFO L125 PetriNetUnfolderBase]: For 309633/309633 co-relation queries the response was YES. [2024-06-28 02:09:24,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71290 conditions, 11058 events. 7029/11058 cut-off events. For 309633/309633 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 72406 event pairs, 1623 based on Foata normal form. 10/11066 useless extension candidates. Maximal degree in co-relation 71163. Up to 9869 conditions per place. [2024-06-28 02:09:25,011 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 385 selfloop transitions, 31 changer transitions 0/423 dead transitions. [2024-06-28 02:09:25,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 423 transitions, 6259 flow [2024-06-28 02:09:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:09:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:09:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-28 02:09:25,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49516908212560384 [2024-06-28 02:09:25,014 INFO L175 Difference]: Start difference. First operand has 264 places, 372 transitions, 5211 flow. Second operand 9 states and 205 transitions. [2024-06-28 02:09:25,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 423 transitions, 6259 flow [2024-06-28 02:09:25,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 423 transitions, 6140 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 02:09:25,903 INFO L231 Difference]: Finished difference. Result has 267 places, 374 transitions, 5224 flow [2024-06-28 02:09:25,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5092, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5224, PETRI_PLACES=267, PETRI_TRANSITIONS=374} [2024-06-28 02:09:25,904 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-28 02:09:25,904 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 374 transitions, 5224 flow [2024-06-28 02:09:25,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:25,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:25,905 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 02:09:25,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 02:09:25,905 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:25,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:25,905 INFO L85 PathProgramCache]: Analyzing trace with hash 950458734, now seen corresponding path program 5 times [2024-06-28 02:09:25,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:25,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344544324] [2024-06-28 02:09:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:25,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:28,095 INFO 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 02:09:28,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:28,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344544324] [2024-06-28 02:09:28,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344544324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:28,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:28,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:28,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041107272] [2024-06-28 02:09:28,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:28,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:28,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:28,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:28,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:28,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:09:28,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 374 transitions, 5224 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:28,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:28,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:09:28,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:30,962 INFO L124 PetriNetUnfolderBase]: 7132/11207 cut-off events. [2024-06-28 02:09:30,963 INFO L125 PetriNetUnfolderBase]: For 313793/313793 co-relation queries the response was YES. [2024-06-28 02:09:31,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71906 conditions, 11207 events. 7132/11207 cut-off events. For 313793/313793 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 73322 event pairs, 1650 based on Foata normal form. 10/11215 useless extension candidates. Maximal degree in co-relation 71778. Up to 10018 conditions per place. [2024-06-28 02:09:31,105 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 378 selfloop transitions, 30 changer transitions 0/415 dead transitions. [2024-06-28 02:09:31,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 415 transitions, 6236 flow [2024-06-28 02:09:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 02:09:31,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186335403726708 [2024-06-28 02:09:31,107 INFO L175 Difference]: Start difference. First operand has 267 places, 374 transitions, 5224 flow. Second operand 7 states and 167 transitions. [2024-06-28 02:09:31,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 415 transitions, 6236 flow [2024-06-28 02:09:32,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 415 transitions, 6142 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 02:09:32,176 INFO L231 Difference]: Finished difference. Result has 267 places, 376 transitions, 5264 flow [2024-06-28 02:09:32,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5130, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5264, PETRI_PLACES=267, PETRI_TRANSITIONS=376} [2024-06-28 02:09:32,176 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-28 02:09:32,177 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 376 transitions, 5264 flow [2024-06-28 02:09:32,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:32,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:32,177 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 02:09:32,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 02:09:32,177 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:32,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:32,177 INFO L85 PathProgramCache]: Analyzing trace with hash 950310864, now seen corresponding path program 6 times [2024-06-28 02:09:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:32,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170105187] [2024-06-28 02:09:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:32,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:34,334 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 02:09:34,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:34,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170105187] [2024-06-28 02:09:34,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170105187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:34,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:34,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:34,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726126184] [2024-06-28 02:09:34,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:34,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:34,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:34,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:34,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:09:34,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 376 transitions, 5264 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:34,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:34,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:09:34,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:36,880 INFO L124 PetriNetUnfolderBase]: 7114/11180 cut-off events. [2024-06-28 02:09:36,880 INFO L125 PetriNetUnfolderBase]: For 296483/296483 co-relation queries the response was YES. [2024-06-28 02:09:36,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70930 conditions, 11180 events. 7114/11180 cut-off events. For 296483/296483 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 73027 event pairs, 1526 based on Foata normal form. 8/11186 useless extension candidates. Maximal degree in co-relation 70801. Up to 9674 conditions per place. [2024-06-28 02:09:37,013 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 376 selfloop transitions, 39 changer transitions 0/422 dead transitions. [2024-06-28 02:09:37,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 422 transitions, 6256 flow [2024-06-28 02:09:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:09:37,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2024-06-28 02:09:37,015 INFO L175 Difference]: Start difference. First operand has 267 places, 376 transitions, 5264 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:09:37,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 422 transitions, 6256 flow [2024-06-28 02:09:37,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 422 transitions, 6142 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 02:09:37,907 INFO L231 Difference]: Finished difference. Result has 269 places, 376 transitions, 5233 flow [2024-06-28 02:09:37,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5150, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5233, PETRI_PLACES=269, PETRI_TRANSITIONS=376} [2024-06-28 02:09:37,909 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 219 predicate places. [2024-06-28 02:09:37,909 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 376 transitions, 5233 flow [2024-06-28 02:09:37,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:37,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:37,910 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 02:09:37,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 02:09:37,910 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:37,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1157385036, now seen corresponding path program 1 times [2024-06-28 02:09:37,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:37,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501083443] [2024-06-28 02:09:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:40,527 INFO 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 02:09:40,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:40,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501083443] [2024-06-28 02:09:40,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501083443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:40,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:40,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:40,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636999264] [2024-06-28 02:09:40,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:40,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:40,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:40,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:40,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:40,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:09:40,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 376 transitions, 5233 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 02:09:40,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:40,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:09:40,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:43,159 INFO L124 PetriNetUnfolderBase]: 7101/11164 cut-off events. [2024-06-28 02:09:43,159 INFO L125 PetriNetUnfolderBase]: For 277655/277655 co-relation queries the response was YES. [2024-06-28 02:09:43,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69966 conditions, 11164 events. 7101/11164 cut-off events. For 277655/277655 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 72991 event pairs, 1571 based on Foata normal form. 6/11168 useless extension candidates. Maximal degree in co-relation 69836. Up to 9721 conditions per place. [2024-06-28 02:09:43,304 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 384 selfloop transitions, 38 changer transitions 0/429 dead transitions. [2024-06-28 02:09:43,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 429 transitions, 6337 flow [2024-06-28 02:09:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:09:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:09:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-28 02:09:43,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975845410628019 [2024-06-28 02:09:43,306 INFO L175 Difference]: Start difference. First operand has 269 places, 376 transitions, 5233 flow. Second operand 9 states and 206 transitions. [2024-06-28 02:09:43,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 429 transitions, 6337 flow [2024-06-28 02:09:43,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 429 transitions, 6202 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 02:09:43,991 INFO L231 Difference]: Finished difference. Result has 272 places, 378 transitions, 5259 flow [2024-06-28 02:09:43,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5098, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5259, PETRI_PLACES=272, PETRI_TRANSITIONS=378} [2024-06-28 02:09:43,991 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 222 predicate places. [2024-06-28 02:09:43,992 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 378 transitions, 5259 flow [2024-06-28 02:09:43,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 02:09:43,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:43,992 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 02:09:43,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 02:09:43,992 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:43,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:43,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1306455054, now seen corresponding path program 1 times [2024-06-28 02:09:43,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:43,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833832664] [2024-06-28 02:09:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:43,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:44,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:44,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833832664] [2024-06-28 02:09:44,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833832664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:44,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:44,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:09:44,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113898459] [2024-06-28 02:09:44,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:44,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:09:44,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:44,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:09:44,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:09:44,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-06-28 02:09:44,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 378 transitions, 5259 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 02:09:44,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:44,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-06-28 02:09:44,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:45,518 INFO L124 PetriNetUnfolderBase]: 4688/7756 cut-off events. [2024-06-28 02:09:45,519 INFO L125 PetriNetUnfolderBase]: For 262208/262728 co-relation queries the response was YES. [2024-06-28 02:09:45,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47601 conditions, 7756 events. 4688/7756 cut-off events. For 262208/262728 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 52761 event pairs, 720 based on Foata normal form. 515/7918 useless extension candidates. Maximal degree in co-relation 47471. Up to 3410 conditions per place. [2024-06-28 02:09:45,621 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 137 selfloop transitions, 116 changer transitions 0/349 dead transitions. [2024-06-28 02:09:45,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 349 transitions, 5376 flow [2024-06-28 02:09:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:09:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:09:45,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-28 02:09:45,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-28 02:09:45,623 INFO L175 Difference]: Start difference. First operand has 272 places, 378 transitions, 5259 flow. Second operand 4 states and 116 transitions. [2024-06-28 02:09:45,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 349 transitions, 5376 flow [2024-06-28 02:09:46,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 349 transitions, 4656 flow, removed 193 selfloop flow, removed 26 redundant places. [2024-06-28 02:09:46,280 INFO L231 Difference]: Finished difference. Result has 251 places, 311 transitions, 4204 flow [2024-06-28 02:09:46,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3672, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4204, PETRI_PLACES=251, PETRI_TRANSITIONS=311} [2024-06-28 02:09:46,280 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 201 predicate places. [2024-06-28 02:09:46,280 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 311 transitions, 4204 flow [2024-06-28 02:09:46,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 02:09:46,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:46,281 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 02:09:46,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 02:09:46,281 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:46,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:46,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1538500867, now seen corresponding path program 1 times [2024-06-28 02:09:46,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:46,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148888452] [2024-06-28 02:09:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:46,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:49,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:49,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148888452] [2024-06-28 02:09:49,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148888452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:49,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:49,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 02:09:49,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077719067] [2024-06-28 02:09:49,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:49,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 02:09:49,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:49,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 02:09:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 02:09:49,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:09:49,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 311 transitions, 4204 flow. Second operand has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 02:09:49,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:49,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:09:49,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:52,603 INFO L124 PetriNetUnfolderBase]: 6869/10806 cut-off events. [2024-06-28 02:09:52,604 INFO L125 PetriNetUnfolderBase]: For 281233/281233 co-relation queries the response was YES. [2024-06-28 02:09:52,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66399 conditions, 10806 events. 6869/10806 cut-off events. For 281233/281233 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 69434 event pairs, 2298 based on Foata normal form. 8/10813 useless extension candidates. Maximal degree in co-relation 66278. Up to 9246 conditions per place. [2024-06-28 02:09:52,747 INFO L140 encePairwiseOnDemand]: 32/46 looper letters, 338 selfloop transitions, 89 changer transitions 8/442 dead transitions. [2024-06-28 02:09:52,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 442 transitions, 6451 flow [2024-06-28 02:09:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 02:09:52,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 02:09:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 299 transitions. [2024-06-28 02:09:52,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 02:09:52,749 INFO L175 Difference]: Start difference. First operand has 251 places, 311 transitions, 4204 flow. Second operand 14 states and 299 transitions. [2024-06-28 02:09:52,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 442 transitions, 6451 flow [2024-06-28 02:09:53,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 442 transitions, 6422 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-28 02:09:53,994 INFO L231 Difference]: Finished difference. Result has 270 places, 366 transitions, 5444 flow [2024-06-28 02:09:53,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4186, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5444, PETRI_PLACES=270, PETRI_TRANSITIONS=366} [2024-06-28 02:09:53,995 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 220 predicate places. [2024-06-28 02:09:53,995 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 366 transitions, 5444 flow [2024-06-28 02:09:53,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 02:09:53,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:53,995 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 02:09:53,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 02:09:53,996 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:53,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:53,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1368780929, now seen corresponding path program 2 times [2024-06-28 02:09:53,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:53,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176827268] [2024-06-28 02:09:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:53,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:57,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:57,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176827268] [2024-06-28 02:09:57,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176827268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:57,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:57,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:09:57,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029729538] [2024-06-28 02:09:57,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:57,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:09:57,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:09:57,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:09:57,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:09:57,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 366 transitions, 5444 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:57,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:57,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:09:57,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:59,963 INFO L124 PetriNetUnfolderBase]: 6396/10002 cut-off events. [2024-06-28 02:09:59,964 INFO L125 PetriNetUnfolderBase]: For 275843/275843 co-relation queries the response was YES. [2024-06-28 02:10:00,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62166 conditions, 10002 events. 6396/10002 cut-off events. For 275843/275843 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 62317 event pairs, 1944 based on Foata normal form. 8/10009 useless extension candidates. Maximal degree in co-relation 62036. Up to 7920 conditions per place. [2024-06-28 02:10:00,090 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 329 selfloop transitions, 109 changer transitions 0/445 dead transitions. [2024-06-28 02:10:00,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 445 transitions, 6954 flow [2024-06-28 02:10:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:10:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:10:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-28 02:10:00,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48616600790513836 [2024-06-28 02:10:00,092 INFO L175 Difference]: Start difference. First operand has 270 places, 366 transitions, 5444 flow. Second operand 11 states and 246 transitions. [2024-06-28 02:10:00,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 445 transitions, 6954 flow [2024-06-28 02:10:00,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 445 transitions, 6691 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-28 02:10:00,833 INFO L231 Difference]: Finished difference. Result has 280 places, 379 transitions, 5714 flow [2024-06-28 02:10:00,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5714, PETRI_PLACES=280, PETRI_TRANSITIONS=379} [2024-06-28 02:10:00,833 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 230 predicate places. [2024-06-28 02:10:00,833 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 379 transitions, 5714 flow [2024-06-28 02:10:00,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:00,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:00,834 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 02:10:00,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 02:10:00,834 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:00,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:00,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1604956289, now seen corresponding path program 3 times [2024-06-28 02:10:00,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:00,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697719808] [2024-06-28 02:10:00,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:00,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:03,723 INFO 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 02:10:03,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:03,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697719808] [2024-06-28 02:10:03,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697719808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:03,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:03,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:03,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682366302] [2024-06-28 02:10:03,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:03,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:03,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:03,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:03,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:03,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:10:03,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 379 transitions, 5714 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:03,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:03,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:10:03,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:06,967 INFO L124 PetriNetUnfolderBase]: 6892/10716 cut-off events. [2024-06-28 02:10:06,967 INFO L125 PetriNetUnfolderBase]: For 294992/294992 co-relation queries the response was YES. [2024-06-28 02:10:07,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67381 conditions, 10716 events. 6892/10716 cut-off events. For 294992/294992 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 67021 event pairs, 2377 based on Foata normal form. 16/10728 useless extension candidates. Maximal degree in co-relation 67248. Up to 9265 conditions per place. [2024-06-28 02:10:07,124 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 349 selfloop transitions, 115 changer transitions 0/471 dead transitions. [2024-06-28 02:10:07,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 471 transitions, 7564 flow [2024-06-28 02:10:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:10:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:10:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-28 02:10:07,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 02:10:07,126 INFO L175 Difference]: Start difference. First operand has 280 places, 379 transitions, 5714 flow. Second operand 12 states and 253 transitions. [2024-06-28 02:10:07,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 471 transitions, 7564 flow [2024-06-28 02:10:07,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 471 transitions, 7243 flow, removed 79 selfloop flow, removed 8 redundant places. [2024-06-28 02:10:07,927 INFO L231 Difference]: Finished difference. Result has 285 places, 410 transitions, 6334 flow [2024-06-28 02:10:07,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6334, PETRI_PLACES=285, PETRI_TRANSITIONS=410} [2024-06-28 02:10:07,927 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 235 predicate places. [2024-06-28 02:10:07,927 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 410 transitions, 6334 flow [2024-06-28 02:10:07,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:07,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:07,928 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 02:10:07,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 02:10:07,928 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:07,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash 846395513, now seen corresponding path program 4 times [2024-06-28 02:10:07,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:07,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620243759] [2024-06-28 02:10:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:07,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:11,049 INFO 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 02:10:11,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:11,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620243759] [2024-06-28 02:10:11,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620243759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:11,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:11,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:11,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794920874] [2024-06-28 02:10:11,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:11,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:11,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:11,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:10:11,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 410 transitions, 6334 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:11,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:11,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:10:11,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:14,025 INFO L124 PetriNetUnfolderBase]: 7122/11049 cut-off events. [2024-06-28 02:10:14,025 INFO L125 PetriNetUnfolderBase]: For 279081/279081 co-relation queries the response was YES. [2024-06-28 02:10:14,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69265 conditions, 11049 events. 7122/11049 cut-off events. For 279081/279081 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 69168 event pairs, 2489 based on Foata normal form. 8/11056 useless extension candidates. Maximal degree in co-relation 69132. Up to 9674 conditions per place. [2024-06-28 02:10:14,151 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 357 selfloop transitions, 113 changer transitions 0/477 dead transitions. [2024-06-28 02:10:14,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 477 transitions, 7732 flow [2024-06-28 02:10:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:10:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:10:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-28 02:10:14,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492753623188406 [2024-06-28 02:10:14,153 INFO L175 Difference]: Start difference. First operand has 285 places, 410 transitions, 6334 flow. Second operand 12 states and 248 transitions. [2024-06-28 02:10:14,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 477 transitions, 7732 flow [2024-06-28 02:10:14,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 477 transitions, 7548 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 02:10:14,927 INFO L231 Difference]: Finished difference. Result has 294 places, 421 transitions, 6675 flow [2024-06-28 02:10:14,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6154, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6675, PETRI_PLACES=294, PETRI_TRANSITIONS=421} [2024-06-28 02:10:14,927 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 244 predicate places. [2024-06-28 02:10:14,927 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 421 transitions, 6675 flow [2024-06-28 02:10:14,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:14,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:14,928 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 02:10:14,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 02:10:14,928 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:14,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1457438945, now seen corresponding path program 1 times [2024-06-28 02:10:14,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:14,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424053239] [2024-06-28 02:10:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:14,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:17,982 INFO 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 02:10:17,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:17,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424053239] [2024-06-28 02:10:17,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424053239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:17,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:17,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211174657] [2024-06-28 02:10:17,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:17,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:17,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:17,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:18,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:10:18,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 421 transitions, 6675 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:18,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:18,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:10:18,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:20,783 INFO L124 PetriNetUnfolderBase]: 7138/11085 cut-off events. [2024-06-28 02:10:20,783 INFO L125 PetriNetUnfolderBase]: For 272570/272570 co-relation queries the response was YES. [2024-06-28 02:10:20,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70081 conditions, 11085 events. 7138/11085 cut-off events. For 272570/272570 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 69453 event pairs, 2622 based on Foata normal form. 2/11086 useless extension candidates. Maximal degree in co-relation 69943. Up to 9988 conditions per place. [2024-06-28 02:10:20,947 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 331 selfloop transitions, 134 changer transitions 0/472 dead transitions. [2024-06-28 02:10:20,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 472 transitions, 7984 flow [2024-06-28 02:10:20,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:10:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:10:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-28 02:10:20,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2024-06-28 02:10:20,948 INFO L175 Difference]: Start difference. First operand has 294 places, 421 transitions, 6675 flow. Second operand 11 states and 231 transitions. [2024-06-28 02:10:20,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 472 transitions, 7984 flow [2024-06-28 02:10:21,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 472 transitions, 7782 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-28 02:10:21,849 INFO L231 Difference]: Finished difference. Result has 299 places, 424 transitions, 6818 flow [2024-06-28 02:10:21,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6473, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6818, PETRI_PLACES=299, PETRI_TRANSITIONS=424} [2024-06-28 02:10:21,849 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 249 predicate places. [2024-06-28 02:10:21,850 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 424 transitions, 6818 flow [2024-06-28 02:10:21,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:21,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:21,850 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 02:10:21,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 02:10:21,850 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:21,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash 741978471, now seen corresponding path program 1 times [2024-06-28 02:10:21,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:21,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920566818] [2024-06-28 02:10:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:21,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:24,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:24,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920566818] [2024-06-28 02:10:24,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920566818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:24,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:24,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:24,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229248667] [2024-06-28 02:10:24,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:24,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:24,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:24,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:24,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:24,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:10:24,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 424 transitions, 6818 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:24,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:24,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:10:24,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:27,874 INFO L124 PetriNetUnfolderBase]: 7219/11198 cut-off events. [2024-06-28 02:10:27,874 INFO L125 PetriNetUnfolderBase]: For 278138/278138 co-relation queries the response was YES. [2024-06-28 02:10:27,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70873 conditions, 11198 events. 7219/11198 cut-off events. For 278138/278138 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 70332 event pairs, 2662 based on Foata normal form. 2/11198 useless extension candidates. Maximal degree in co-relation 70733. Up to 10200 conditions per place. [2024-06-28 02:10:28,013 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 402 selfloop transitions, 66 changer transitions 0/475 dead transitions. [2024-06-28 02:10:28,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 475 transitions, 8178 flow [2024-06-28 02:10:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:10:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:10:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-28 02:10:28,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054347826086957 [2024-06-28 02:10:28,015 INFO L175 Difference]: Start difference. First operand has 299 places, 424 transitions, 6818 flow. Second operand 8 states and 186 transitions. [2024-06-28 02:10:28,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 475 transitions, 8178 flow [2024-06-28 02:10:28,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 475 transitions, 7873 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-28 02:10:28,945 INFO L231 Difference]: Finished difference. Result has 299 places, 428 transitions, 6731 flow [2024-06-28 02:10:28,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6513, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6731, PETRI_PLACES=299, PETRI_TRANSITIONS=428} [2024-06-28 02:10:28,946 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 249 predicate places. [2024-06-28 02:10:28,946 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 428 transitions, 6731 flow [2024-06-28 02:10:28,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:28,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:28,946 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 02:10:28,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 02:10:28,946 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:28,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:28,947 INFO L85 PathProgramCache]: Analyzing trace with hash 744835431, now seen corresponding path program 2 times [2024-06-28 02:10:28,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:28,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808918031] [2024-06-28 02:10:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:28,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:31,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:31,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808918031] [2024-06-28 02:10:31,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808918031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:31,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:31,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:31,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817221354] [2024-06-28 02:10:31,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:31,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:31,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:31,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:10:31,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 428 transitions, 6731 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:31,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:31,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:10:31,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:34,948 INFO L124 PetriNetUnfolderBase]: 7257/11267 cut-off events. [2024-06-28 02:10:34,948 INFO L125 PetriNetUnfolderBase]: For 284692/284692 co-relation queries the response was YES. [2024-06-28 02:10:35,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71402 conditions, 11267 events. 7257/11267 cut-off events. For 284692/284692 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 70882 event pairs, 2715 based on Foata normal form. 2/11267 useless extension candidates. Maximal degree in co-relation 71261. Up to 10404 conditions per place. [2024-06-28 02:10:35,129 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 396 selfloop transitions, 63 changer transitions 0/466 dead transitions. [2024-06-28 02:10:35,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 466 transitions, 7850 flow [2024-06-28 02:10:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:10:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:10:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-28 02:10:35,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47554347826086957 [2024-06-28 02:10:35,131 INFO L175 Difference]: Start difference. First operand has 299 places, 428 transitions, 6731 flow. Second operand 8 states and 175 transitions. [2024-06-28 02:10:35,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 466 transitions, 7850 flow [2024-06-28 02:10:36,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 466 transitions, 7709 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-28 02:10:36,269 INFO L231 Difference]: Finished difference. Result has 303 places, 430 transitions, 6767 flow [2024-06-28 02:10:36,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6606, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6767, PETRI_PLACES=303, PETRI_TRANSITIONS=430} [2024-06-28 02:10:36,270 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 253 predicate places. [2024-06-28 02:10:36,270 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 430 transitions, 6767 flow [2024-06-28 02:10:36,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:36,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:36,270 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 02:10:36,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 02:10:36,271 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:36,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash 736497919, now seen corresponding path program 2 times [2024-06-28 02:10:36,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:36,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158420479] [2024-06-28 02:10:36,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:39,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:39,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158420479] [2024-06-28 02:10:39,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158420479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:39,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:39,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:39,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062117364] [2024-06-28 02:10:39,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:39,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:39,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:39,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:39,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:39,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:10:39,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 430 transitions, 6767 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:39,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:39,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:10:39,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:42,269 INFO L124 PetriNetUnfolderBase]: 7317/11356 cut-off events. [2024-06-28 02:10:42,269 INFO L125 PetriNetUnfolderBase]: For 293533/293533 co-relation queries the response was YES. [2024-06-28 02:10:42,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71517 conditions, 11356 events. 7317/11356 cut-off events. For 293533/293533 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 71491 event pairs, 2646 based on Foata normal form. 2/11356 useless extension candidates. Maximal degree in co-relation 71374. Up to 9848 conditions per place. [2024-06-28 02:10:42,412 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 268 selfloop transitions, 213 changer transitions 0/488 dead transitions. [2024-06-28 02:10:42,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 488 transitions, 8532 flow [2024-06-28 02:10:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:10:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:10:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-28 02:10:42,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45471014492753625 [2024-06-28 02:10:42,413 INFO L175 Difference]: Start difference. First operand has 303 places, 430 transitions, 6767 flow. Second operand 12 states and 251 transitions. [2024-06-28 02:10:42,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 488 transitions, 8532 flow [2024-06-28 02:10:43,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 488 transitions, 8397 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 02:10:43,454 INFO L231 Difference]: Finished difference. Result has 309 places, 439 transitions, 7271 flow [2024-06-28 02:10:43,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6632, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7271, PETRI_PLACES=309, PETRI_TRANSITIONS=439} [2024-06-28 02:10:43,455 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 259 predicate places. [2024-06-28 02:10:43,455 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 439 transitions, 7271 flow [2024-06-28 02:10:43,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:43,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:43,456 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 02:10:43,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 02:10:43,456 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:43,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:43,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1796931901, now seen corresponding path program 3 times [2024-06-28 02:10:43,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:43,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956856604] [2024-06-28 02:10:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:43,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:46,624 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 02:10:46,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:46,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956856604] [2024-06-28 02:10:46,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956856604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:46,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:46,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:46,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979045349] [2024-06-28 02:10:46,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:46,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:46,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:10:46,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 439 transitions, 7271 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:46,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:46,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:10:46,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:49,847 INFO L124 PetriNetUnfolderBase]: 7355/11414 cut-off events. [2024-06-28 02:10:49,848 INFO L125 PetriNetUnfolderBase]: For 308001/308001 co-relation queries the response was YES. [2024-06-28 02:10:49,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72822 conditions, 11414 events. 7355/11414 cut-off events. For 308001/308001 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 71800 event pairs, 2647 based on Foata normal form. 2/11414 useless extension candidates. Maximal degree in co-relation 72678. Up to 9883 conditions per place. [2024-06-28 02:10:50,022 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 268 selfloop transitions, 213 changer transitions 0/488 dead transitions. [2024-06-28 02:10:50,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 488 transitions, 8963 flow [2024-06-28 02:10:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:10:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:10:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-28 02:10:50,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45849802371541504 [2024-06-28 02:10:50,024 INFO L175 Difference]: Start difference. First operand has 309 places, 439 transitions, 7271 flow. Second operand 11 states and 232 transitions. [2024-06-28 02:10:50,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 488 transitions, 8963 flow [2024-06-28 02:10:51,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 488 transitions, 8649 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-28 02:10:51,109 INFO L231 Difference]: Finished difference. Result has 314 places, 445 transitions, 7535 flow [2024-06-28 02:10:51,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7021, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7535, PETRI_PLACES=314, PETRI_TRANSITIONS=445} [2024-06-28 02:10:51,109 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 264 predicate places. [2024-06-28 02:10:51,109 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 445 transitions, 7535 flow [2024-06-28 02:10:51,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:51,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:51,109 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 02:10:51,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 02:10:51,109 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:51,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash 569276535, now seen corresponding path program 4 times [2024-06-28 02:10:51,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:51,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617597933] [2024-06-28 02:10:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:54,199 INFO 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 02:10:54,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:54,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617597933] [2024-06-28 02:10:54,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617597933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:54,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:54,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:54,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923396990] [2024-06-28 02:10:54,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:54,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:54,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:54,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:54,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:54,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:10:54,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 445 transitions, 7535 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:54,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:54,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:10:54,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:57,587 INFO L124 PetriNetUnfolderBase]: 7349/11406 cut-off events. [2024-06-28 02:10:57,588 INFO L125 PetriNetUnfolderBase]: For 307182/307182 co-relation queries the response was YES. [2024-06-28 02:10:57,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72951 conditions, 11406 events. 7349/11406 cut-off events. For 307182/307182 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 71876 event pairs, 2650 based on Foata normal form. 2/11406 useless extension candidates. Maximal degree in co-relation 72805. Up to 9878 conditions per place. [2024-06-28 02:10:57,719 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 271 selfloop transitions, 214 changer transitions 0/492 dead transitions. [2024-06-28 02:10:57,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 492 transitions, 8973 flow [2024-06-28 02:10:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 02:10:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 02:10:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 264 transitions. [2024-06-28 02:10:57,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4414715719063545 [2024-06-28 02:10:57,720 INFO L175 Difference]: Start difference. First operand has 314 places, 445 transitions, 7535 flow. Second operand 13 states and 264 transitions. [2024-06-28 02:10:57,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 492 transitions, 8973 flow [2024-06-28 02:10:58,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 492 transitions, 8584 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 02:10:58,947 INFO L231 Difference]: Finished difference. Result has 320 places, 445 transitions, 7580 flow [2024-06-28 02:10:58,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7146, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7580, PETRI_PLACES=320, PETRI_TRANSITIONS=445} [2024-06-28 02:10:58,948 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 270 predicate places. [2024-06-28 02:10:58,948 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 445 transitions, 7580 flow [2024-06-28 02:10:58,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:58,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:58,948 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 02:10:58,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 02:10:58,949 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:58,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:58,949 INFO L85 PathProgramCache]: Analyzing trace with hash 2077857617, now seen corresponding path program 3 times [2024-06-28 02:10:58,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:58,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254105456] [2024-06-28 02:10:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:58,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:01,763 INFO 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 02:11:01,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:01,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254105456] [2024-06-28 02:11:01,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254105456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:01,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:01,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:11:01,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743393791] [2024-06-28 02:11:01,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:01,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:11:01,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:01,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:11:01,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:11:01,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:11:01,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 445 transitions, 7580 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:01,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:01,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:11:01,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:04,708 INFO L124 PetriNetUnfolderBase]: 7523/11688 cut-off events. [2024-06-28 02:11:04,709 INFO L125 PetriNetUnfolderBase]: For 315049/315049 co-relation queries the response was YES. [2024-06-28 02:11:04,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74577 conditions, 11688 events. 7523/11688 cut-off events. For 315049/315049 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 73966 event pairs, 2720 based on Foata normal form. 2/11689 useless extension candidates. Maximal degree in co-relation 74430. Up to 10656 conditions per place. [2024-06-28 02:11:04,903 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 417 selfloop transitions, 60 changer transitions 0/484 dead transitions. [2024-06-28 02:11:04,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 484 transitions, 8767 flow [2024-06-28 02:11:04,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:11:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:11:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-28 02:11:04,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47282608695652173 [2024-06-28 02:11:04,905 INFO L175 Difference]: Start difference. First operand has 320 places, 445 transitions, 7580 flow. Second operand 8 states and 174 transitions. [2024-06-28 02:11:04,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 484 transitions, 8767 flow [2024-06-28 02:11:06,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 484 transitions, 8321 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-28 02:11:06,254 INFO L231 Difference]: Finished difference. Result has 316 places, 448 transitions, 7309 flow [2024-06-28 02:11:06,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7134, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7309, PETRI_PLACES=316, PETRI_TRANSITIONS=448} [2024-06-28 02:11:06,255 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 266 predicate places. [2024-06-28 02:11:06,255 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 448 transitions, 7309 flow [2024-06-28 02:11:06,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:06,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:06,255 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 02:11:06,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 02:11:06,256 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:06,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:06,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2084291295, now seen corresponding path program 5 times [2024-06-28 02:11:06,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:06,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680853068] [2024-06-28 02:11:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:06,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:09,242 INFO 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 02:11:09,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:09,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680853068] [2024-06-28 02:11:09,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680853068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:09,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:09,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:11:09,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404906417] [2024-06-28 02:11:09,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:09,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:11:09,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:09,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:11:09,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:11:09,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:11:09,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 448 transitions, 7309 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:09,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:09,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:11:09,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:12,741 INFO L124 PetriNetUnfolderBase]: 7561/11737 cut-off events. [2024-06-28 02:11:12,741 INFO L125 PetriNetUnfolderBase]: For 325282/325282 co-relation queries the response was YES. [2024-06-28 02:11:12,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74741 conditions, 11737 events. 7561/11737 cut-off events. For 325282/325282 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 74234 event pairs, 2692 based on Foata normal form. 2/11738 useless extension candidates. Maximal degree in co-relation 74593. Up to 10604 conditions per place. [2024-06-28 02:11:12,883 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 365 selfloop transitions, 124 changer transitions 0/496 dead transitions. [2024-06-28 02:11:12,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 496 transitions, 8689 flow [2024-06-28 02:11:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:11:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:11:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-28 02:11:12,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2024-06-28 02:11:12,885 INFO L175 Difference]: Start difference. First operand has 316 places, 448 transitions, 7309 flow. Second operand 12 states and 240 transitions. [2024-06-28 02:11:12,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 496 transitions, 8689 flow [2024-06-28 02:11:14,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 496 transitions, 8563 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 02:11:14,064 INFO L231 Difference]: Finished difference. Result has 322 places, 454 transitions, 7531 flow [2024-06-28 02:11:14,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7183, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7531, PETRI_PLACES=322, PETRI_TRANSITIONS=454} [2024-06-28 02:11:14,066 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 272 predicate places. [2024-06-28 02:11:14,066 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 454 transitions, 7531 flow [2024-06-28 02:11:14,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:14,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:14,067 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, 1] [2024-06-28 02:11:14,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 02:11:14,067 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:14,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:14,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2077862205, now seen corresponding path program 6 times [2024-06-28 02:11:14,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:14,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178066149] [2024-06-28 02:11:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:14,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:17,135 INFO 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 02:11:17,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:17,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178066149] [2024-06-28 02:11:17,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178066149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:17,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:17,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:11:17,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781469356] [2024-06-28 02:11:17,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:17,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:11:17,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:11:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:11:17,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:11:17,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 454 transitions, 7531 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:17,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:17,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:11:17,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:20,369 INFO L124 PetriNetUnfolderBase]: 7577/11753 cut-off events. [2024-06-28 02:11:20,369 INFO L125 PetriNetUnfolderBase]: For 332831/332831 co-relation queries the response was YES. [2024-06-28 02:11:20,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75118 conditions, 11753 events. 7577/11753 cut-off events. For 332831/332831 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 74245 event pairs, 2686 based on Foata normal form. 2/11754 useless extension candidates. Maximal degree in co-relation 74969. Up to 10619 conditions per place. [2024-06-28 02:11:20,545 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 363 selfloop transitions, 127 changer transitions 0/497 dead transitions. [2024-06-28 02:11:20,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 497 transitions, 8867 flow [2024-06-28 02:11:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:11:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:11:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-28 02:11:20,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426877470355731 [2024-06-28 02:11:20,547 INFO L175 Difference]: Start difference. First operand has 322 places, 454 transitions, 7531 flow. Second operand 11 states and 224 transitions. [2024-06-28 02:11:20,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 497 transitions, 8867 flow [2024-06-28 02:11:21,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 497 transitions, 8697 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-28 02:11:21,840 INFO L231 Difference]: Finished difference. Result has 325 places, 457 transitions, 7671 flow [2024-06-28 02:11:21,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7361, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7671, PETRI_PLACES=325, PETRI_TRANSITIONS=457} [2024-06-28 02:11:21,841 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 275 predicate places. [2024-06-28 02:11:21,841 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 457 transitions, 7671 flow [2024-06-28 02:11:21,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:21,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:21,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:21,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 02:11:21,842 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:21,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:21,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2077851975, now seen corresponding path program 7 times [2024-06-28 02:11:21,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:21,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169772121] [2024-06-28 02:11:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:21,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:24,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:24,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169772121] [2024-06-28 02:11:24,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169772121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:24,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:24,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:11:24,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237222533] [2024-06-28 02:11:24,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:24,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:11:24,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:24,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:11:24,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:11:24,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:11:24,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 457 transitions, 7671 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:24,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:24,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:11:24,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:28,037 INFO L124 PetriNetUnfolderBase]: 7571/11751 cut-off events. [2024-06-28 02:11:28,037 INFO L125 PetriNetUnfolderBase]: For 332891/332891 co-relation queries the response was YES. [2024-06-28 02:11:28,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75322 conditions, 11751 events. 7571/11751 cut-off events. For 332891/332891 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 74236 event pairs, 2688 based on Foata normal form. 2/11752 useless extension candidates. Maximal degree in co-relation 75171. Up to 10614 conditions per place. [2024-06-28 02:11:28,196 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 362 selfloop transitions, 127 changer transitions 0/496 dead transitions. [2024-06-28 02:11:28,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 496 transitions, 8805 flow [2024-06-28 02:11:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:11:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:11:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-28 02:11:28,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407114624505929 [2024-06-28 02:11:28,198 INFO L175 Difference]: Start difference. First operand has 325 places, 457 transitions, 7671 flow. Second operand 11 states and 223 transitions. [2024-06-28 02:11:28,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 496 transitions, 8805 flow [2024-06-28 02:11:29,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 496 transitions, 8513 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-28 02:11:29,376 INFO L231 Difference]: Finished difference. Result has 327 places, 457 transitions, 7639 flow [2024-06-28 02:11:29,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7379, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7639, PETRI_PLACES=327, PETRI_TRANSITIONS=457} [2024-06-28 02:11:29,377 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 277 predicate places. [2024-06-28 02:11:29,377 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 457 transitions, 7639 flow [2024-06-28 02:11:29,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:29,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:29,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:29,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 02:11:29,378 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:29,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:29,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1812690687, now seen corresponding path program 5 times [2024-06-28 02:11:29,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:29,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369984301] [2024-06-28 02:11:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:29,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:32,685 INFO 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 02:11:32,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:32,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369984301] [2024-06-28 02:11:32,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369984301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:32,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:32,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:11:32,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613025867] [2024-06-28 02:11:32,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:32,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:11:32,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:11:32,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:11:32,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:11:32,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 457 transitions, 7639 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:32,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:32,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:11:32,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:36,250 INFO L124 PetriNetUnfolderBase]: 7553/11714 cut-off events. [2024-06-28 02:11:36,251 INFO L125 PetriNetUnfolderBase]: For 331538/331538 co-relation queries the response was YES. [2024-06-28 02:11:36,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74526 conditions, 11714 events. 7553/11714 cut-off events. For 331538/331538 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 73846 event pairs, 2017 based on Foata normal form. 8/11721 useless extension candidates. Maximal degree in co-relation 74374. Up to 8922 conditions per place. [2024-06-28 02:11:36,400 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 359 selfloop transitions, 152 changer transitions 0/518 dead transitions. [2024-06-28 02:11:36,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 518 transitions, 8957 flow [2024-06-28 02:11:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:11:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:11:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-28 02:11:36,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4891304347826087 [2024-06-28 02:11:36,402 INFO L175 Difference]: Start difference. First operand has 327 places, 457 transitions, 7639 flow. Second operand 10 states and 225 transitions. [2024-06-28 02:11:36,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 518 transitions, 8957 flow [2024-06-28 02:11:37,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 518 transitions, 8671 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-28 02:11:37,522 INFO L231 Difference]: Finished difference. Result has 328 places, 460 transitions, 7813 flow [2024-06-28 02:11:37,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7361, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7813, PETRI_PLACES=328, PETRI_TRANSITIONS=460} [2024-06-28 02:11:37,523 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 278 predicate places. [2024-06-28 02:11:37,523 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 460 transitions, 7813 flow [2024-06-28 02:11:37,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:37,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:37,523 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 02:11:37,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 02:11:37,524 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:37,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1581824329, now seen corresponding path program 4 times [2024-06-28 02:11:37,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:37,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991459830] [2024-06-28 02:11:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:40,325 INFO 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 02:11:40,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:40,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991459830] [2024-06-28 02:11:40,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991459830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:40,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:40,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:11:40,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154382427] [2024-06-28 02:11:40,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:40,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:11:40,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:40,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:11:40,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:11:40,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:11:40,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 460 transitions, 7813 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:40,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:40,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:11:40,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:43,460 INFO L124 PetriNetUnfolderBase]: 7634/11856 cut-off events. [2024-06-28 02:11:43,460 INFO L125 PetriNetUnfolderBase]: For 333730/333738 co-relation queries the response was YES. [2024-06-28 02:11:43,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77458 conditions, 11856 events. 7634/11856 cut-off events. For 333730/333738 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 75089 event pairs, 2754 based on Foata normal form. 10/11865 useless extension candidates. Maximal degree in co-relation 77304. Up to 10846 conditions per place. [2024-06-28 02:11:43,644 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 439 selfloop transitions, 63 changer transitions 0/509 dead transitions. [2024-06-28 02:11:43,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 509 transitions, 9263 flow [2024-06-28 02:11:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:11:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:11:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-28 02:11:43,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945652173913043 [2024-06-28 02:11:43,645 INFO L175 Difference]: Start difference. First operand has 328 places, 460 transitions, 7813 flow. Second operand 8 states and 182 transitions. [2024-06-28 02:11:43,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 509 transitions, 9263 flow [2024-06-28 02:11:44,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 509 transitions, 8995 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-28 02:11:44,883 INFO L231 Difference]: Finished difference. Result has 328 places, 464 transitions, 7766 flow [2024-06-28 02:11:44,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7551, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7766, PETRI_PLACES=328, PETRI_TRANSITIONS=464} [2024-06-28 02:11:44,883 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 278 predicate places. [2024-06-28 02:11:44,883 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 464 transitions, 7766 flow [2024-06-28 02:11:44,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:44,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:44,884 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 02:11:44,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 02:11:44,884 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:44,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash -844859033, now seen corresponding path program 5 times [2024-06-28 02:11:44,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:44,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344187881] [2024-06-28 02:11:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:44,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:47,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344187881] [2024-06-28 02:11:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344187881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:47,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:47,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:11:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325191774] [2024-06-28 02:11:47,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:47,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:11:47,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:11:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:11:47,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:11:47,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 464 transitions, 7766 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:47,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:47,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:11:47,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:50,820 INFO L124 PetriNetUnfolderBase]: 7672/11931 cut-off events. [2024-06-28 02:11:50,821 INFO L125 PetriNetUnfolderBase]: For 323250/323258 co-relation queries the response was YES. [2024-06-28 02:11:50,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76681 conditions, 11931 events. 7672/11931 cut-off events. For 323250/323258 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 75842 event pairs, 2797 based on Foata normal form. 10/11940 useless extension candidates. Maximal degree in co-relation 76527. Up to 10993 conditions per place. [2024-06-28 02:11:50,998 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 432 selfloop transitions, 61 changer transitions 0/500 dead transitions. [2024-06-28 02:11:50,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 500 transitions, 8953 flow [2024-06-28 02:11:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:11:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:11:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 02:11:51,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46467391304347827 [2024-06-28 02:11:51,000 INFO L175 Difference]: Start difference. First operand has 328 places, 464 transitions, 7766 flow. Second operand 8 states and 171 transitions. [2024-06-28 02:11:51,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 500 transitions, 8953 flow [2024-06-28 02:11:52,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 500 transitions, 8810 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 02:11:52,375 INFO L231 Difference]: Finished difference. Result has 332 places, 466 transitions, 7798 flow [2024-06-28 02:11:52,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7641, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7798, PETRI_PLACES=332, PETRI_TRANSITIONS=466} [2024-06-28 02:11:52,376 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 282 predicate places. [2024-06-28 02:11:52,376 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 466 transitions, 7798 flow [2024-06-28 02:11:52,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:52,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:52,377 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 02:11:52,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 02:11:52,377 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:52,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash 370541051, now seen corresponding path program 6 times [2024-06-28 02:11:52,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:52,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264653287] [2024-06-28 02:11:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:52,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:54,745 INFO 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 02:11:54,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:54,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264653287] [2024-06-28 02:11:54,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264653287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:54,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:54,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:11:54,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436782899] [2024-06-28 02:11:54,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:54,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:11:54,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:54,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:11:54,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:11:54,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:11:54,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 466 transitions, 7798 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:54,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:54,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:11:54,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:57,942 INFO L124 PetriNetUnfolderBase]: 7710/11967 cut-off events. [2024-06-28 02:11:57,942 INFO L125 PetriNetUnfolderBase]: For 326702/326710 co-relation queries the response was YES. [2024-06-28 02:11:58,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76912 conditions, 11967 events. 7710/11967 cut-off events. For 326702/326710 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 75982 event pairs, 2335 based on Foata normal form. 10/11976 useless extension candidates. Maximal degree in co-relation 76756. Up to 10431 conditions per place. [2024-06-28 02:11:58,172 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 429 selfloop transitions, 87 changer transitions 0/523 dead transitions. [2024-06-28 02:11:58,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 523 transitions, 9529 flow [2024-06-28 02:11:58,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:11:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:11:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-28 02:11:58,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135869565217391 [2024-06-28 02:11:58,174 INFO L175 Difference]: Start difference. First operand has 332 places, 466 transitions, 7798 flow. Second operand 8 states and 189 transitions. [2024-06-28 02:11:58,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 523 transitions, 9529 flow [2024-06-28 02:11:59,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 523 transitions, 9398 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 02:11:59,554 INFO L231 Difference]: Finished difference. Result has 335 places, 472 transitions, 8041 flow [2024-06-28 02:11:59,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7667, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8041, PETRI_PLACES=335, PETRI_TRANSITIONS=472} [2024-06-28 02:11:59,555 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 285 predicate places. [2024-06-28 02:11:59,555 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 472 transitions, 8041 flow [2024-06-28 02:11:59,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:59,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:59,555 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 02:11:59,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 02:11:59,555 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:59,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:59,556 INFO L85 PathProgramCache]: Analyzing trace with hash -853196545, now seen corresponding path program 8 times [2024-06-28 02:11:59,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:59,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544110593] [2024-06-28 02:11:59,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:59,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:02,268 INFO 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 02:12:02,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:02,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544110593] [2024-06-28 02:12:02,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544110593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:02,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:02,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:12:02,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561915658] [2024-06-28 02:12:02,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:02,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:12:02,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:02,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:12:02,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:12:02,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:12:02,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 472 transitions, 8041 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:02,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:02,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:12:02,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:05,743 INFO L124 PetriNetUnfolderBase]: 7726/12000 cut-off events. [2024-06-28 02:12:05,744 INFO L125 PetriNetUnfolderBase]: For 337138/337140 co-relation queries the response was YES. [2024-06-28 02:12:05,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78227 conditions, 12000 events. 7726/12000 cut-off events. For 337138/337140 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 76373 event pairs, 2787 based on Foata normal form. 2/12001 useless extension candidates. Maximal degree in co-relation 78069. Up to 10803 conditions per place. [2024-06-28 02:12:05,918 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 380 selfloop transitions, 130 changer transitions 0/517 dead transitions. [2024-06-28 02:12:05,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 517 transitions, 9440 flow [2024-06-28 02:12:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:12:05,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:12:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-28 02:12:05,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44466403162055335 [2024-06-28 02:12:05,920 INFO L175 Difference]: Start difference. First operand has 335 places, 472 transitions, 8041 flow. Second operand 11 states and 225 transitions. [2024-06-28 02:12:05,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 517 transitions, 9440 flow [2024-06-28 02:12:07,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 517 transitions, 9293 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:07,192 INFO L231 Difference]: Finished difference. Result has 343 places, 475 transitions, 8215 flow [2024-06-28 02:12:07,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7894, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8215, PETRI_PLACES=343, PETRI_TRANSITIONS=475} [2024-06-28 02:12:07,192 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 293 predicate places. [2024-06-28 02:12:07,192 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 475 transitions, 8215 flow [2024-06-28 02:12:07,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:07,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:07,193 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 02:12:07,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 02:12:07,193 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:07,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:07,193 INFO L85 PathProgramCache]: Analyzing trace with hash -299936949, now seen corresponding path program 9 times [2024-06-28 02:12:07,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:07,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304425743] [2024-06-28 02:12:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:07,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:10,065 INFO 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 02:12:10,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:10,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304425743] [2024-06-28 02:12:10,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304425743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:10,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:10,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:12:10,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187410897] [2024-06-28 02:12:10,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:10,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:12:10,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:10,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:12:10,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:12:10,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:12:10,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 475 transitions, 8215 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:10,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:10,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:12:10,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:13,324 INFO L124 PetriNetUnfolderBase]: 7764/12052 cut-off events. [2024-06-28 02:12:13,325 INFO L125 PetriNetUnfolderBase]: For 342835/342837 co-relation queries the response was YES. [2024-06-28 02:12:13,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78415 conditions, 12052 events. 7764/12052 cut-off events. For 342835/342837 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 76623 event pairs, 2784 based on Foata normal form. 2/12053 useless extension candidates. Maximal degree in co-relation 78255. Up to 10838 conditions per place. [2024-06-28 02:12:13,523 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 385 selfloop transitions, 132 changer transitions 0/524 dead transitions. [2024-06-28 02:12:13,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 524 transitions, 9859 flow [2024-06-28 02:12:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:12:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:12:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-28 02:12:13,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384057971014493 [2024-06-28 02:12:13,524 INFO L175 Difference]: Start difference. First operand has 343 places, 475 transitions, 8215 flow. Second operand 12 states and 242 transitions. [2024-06-28 02:12:13,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 524 transitions, 9859 flow [2024-06-28 02:12:15,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 524 transitions, 9449 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-28 02:12:15,163 INFO L231 Difference]: Finished difference. Result has 346 places, 481 transitions, 8197 flow [2024-06-28 02:12:15,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7845, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8197, PETRI_PLACES=346, PETRI_TRANSITIONS=481} [2024-06-28 02:12:15,164 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 296 predicate places. [2024-06-28 02:12:15,164 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 481 transitions, 8197 flow [2024-06-28 02:12:15,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:15,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:15,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:15,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 02:12:15,165 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:15,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1658189537, now seen corresponding path program 10 times [2024-06-28 02:12:15,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:15,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315246304] [2024-06-28 02:12:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:15,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:18,147 INFO 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 02:12:18,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:18,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315246304] [2024-06-28 02:12:18,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315246304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:18,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:18,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:12:18,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705185120] [2024-06-28 02:12:18,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:18,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:12:18,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:18,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:12:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:12:18,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:12:18,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 481 transitions, 8197 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:18,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:18,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:12:18,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:21,428 INFO L124 PetriNetUnfolderBase]: 7758/12050 cut-off events. [2024-06-28 02:12:21,429 INFO L125 PetriNetUnfolderBase]: For 339441/339443 co-relation queries the response was YES. [2024-06-28 02:12:21,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78041 conditions, 12050 events. 7758/12050 cut-off events. For 339441/339443 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 76736 event pairs, 2787 based on Foata normal form. 2/12051 useless extension candidates. Maximal degree in co-relation 77880. Up to 10833 conditions per place. [2024-06-28 02:12:21,602 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 380 selfloop transitions, 131 changer transitions 0/518 dead transitions. [2024-06-28 02:12:21,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 518 transitions, 9529 flow [2024-06-28 02:12:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:12:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:12:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-28 02:12:21,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45217391304347826 [2024-06-28 02:12:21,604 INFO L175 Difference]: Start difference. First operand has 346 places, 481 transitions, 8197 flow. Second operand 10 states and 208 transitions. [2024-06-28 02:12:21,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 518 transitions, 9529 flow [2024-06-28 02:12:23,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 518 transitions, 9244 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-28 02:12:23,189 INFO L231 Difference]: Finished difference. Result has 348 places, 481 transitions, 8180 flow [2024-06-28 02:12:23,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7912, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8180, PETRI_PLACES=348, PETRI_TRANSITIONS=481} [2024-06-28 02:12:23,189 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 298 predicate places. [2024-06-28 02:12:23,190 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 481 transitions, 8180 flow [2024-06-28 02:12:23,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:23,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:23,190 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 02:12:23,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 02:12:23,190 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:23,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:23,191 INFO L85 PathProgramCache]: Analyzing trace with hash -416761777, now seen corresponding path program 7 times [2024-06-28 02:12:23,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:23,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187363095] [2024-06-28 02:12:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:23,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:25,598 INFO 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 02:12:25,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:25,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187363095] [2024-06-28 02:12:25,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187363095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:25,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:25,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:12:25,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58392733] [2024-06-28 02:12:25,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:25,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:12:25,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:12:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:12:25,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:12:25,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 481 transitions, 8180 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:25,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:25,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:12:25,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:28,931 INFO L124 PetriNetUnfolderBase]: 7804/12095 cut-off events. [2024-06-28 02:12:28,931 INFO L125 PetriNetUnfolderBase]: For 345477/345485 co-relation queries the response was YES. [2024-06-28 02:12:29,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78444 conditions, 12095 events. 7804/12095 cut-off events. For 345477/345485 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 76740 event pairs, 2319 based on Foata normal form. 10/12104 useless extension candidates. Maximal degree in co-relation 78282. Up to 10533 conditions per place. [2024-06-28 02:12:29,127 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 433 selfloop transitions, 91 changer transitions 0/531 dead transitions. [2024-06-28 02:12:29,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 531 transitions, 9693 flow [2024-06-28 02:12:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:12:29,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:12:29,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-28 02:12:29,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 02:12:29,129 INFO L175 Difference]: Start difference. First operand has 348 places, 481 transitions, 8180 flow. Second operand 8 states and 184 transitions. [2024-06-28 02:12:29,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 531 transitions, 9693 flow [2024-06-28 02:12:30,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 531 transitions, 9431 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 02:12:30,773 INFO L231 Difference]: Finished difference. Result has 348 places, 485 transitions, 8198 flow [2024-06-28 02:12:30,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7918, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8198, PETRI_PLACES=348, PETRI_TRANSITIONS=485} [2024-06-28 02:12:30,773 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 298 predicate places. [2024-06-28 02:12:30,774 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 485 transitions, 8198 flow [2024-06-28 02:12:30,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:30,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:30,774 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 02:12:30,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 02:12:30,774 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:30,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:30,775 INFO L85 PathProgramCache]: Analyzing trace with hash 632181095, now seen corresponding path program 8 times [2024-06-28 02:12:30,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:30,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103634828] [2024-06-28 02:12:30,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:30,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:33,210 INFO 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 02:12:33,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:33,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103634828] [2024-06-28 02:12:33,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103634828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:33,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:33,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:12:33,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961016204] [2024-06-28 02:12:33,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:33,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:12:33,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:33,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:12:33,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:12:33,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:12:33,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 485 transitions, 8198 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:33,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:33,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:12:33,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:36,666 INFO L124 PetriNetUnfolderBase]: 7842/12187 cut-off events. [2024-06-28 02:12:36,667 INFO L125 PetriNetUnfolderBase]: For 354233/354241 co-relation queries the response was YES. [2024-06-28 02:12:36,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79444 conditions, 12187 events. 7842/12187 cut-off events. For 354233/354241 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 77772 event pairs, 2832 based on Foata normal form. 10/12196 useless extension candidates. Maximal degree in co-relation 79280. Up to 11233 conditions per place. [2024-06-28 02:12:36,857 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 446 selfloop transitions, 63 changer transitions 0/516 dead transitions. [2024-06-28 02:12:36,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 516 transitions, 9393 flow [2024-06-28 02:12:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:12:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:12:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 02:12:36,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453804347826087 [2024-06-28 02:12:36,858 INFO L175 Difference]: Start difference. First operand has 348 places, 485 transitions, 8198 flow. Second operand 8 states and 167 transitions. [2024-06-28 02:12:36,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 516 transitions, 9393 flow [2024-06-28 02:12:38,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 516 transitions, 9248 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 02:12:38,520 INFO L231 Difference]: Finished difference. Result has 352 places, 487 transitions, 8228 flow [2024-06-28 02:12:38,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8055, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8228, PETRI_PLACES=352, PETRI_TRANSITIONS=487} [2024-06-28 02:12:38,520 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 302 predicate places. [2024-06-28 02:12:38,520 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 487 transitions, 8228 flow [2024-06-28 02:12:38,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:38,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:38,521 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 02:12:38,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 02:12:38,521 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:38,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1168412165, now seen corresponding path program 9 times [2024-06-28 02:12:38,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:38,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351230356] [2024-06-28 02:12:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:38,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:41,116 INFO 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 02:12:41,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:41,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351230356] [2024-06-28 02:12:41,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351230356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:41,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:41,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:12:41,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274568005] [2024-06-28 02:12:41,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:41,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:12:41,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:41,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:12:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:12:41,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:12:41,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 487 transitions, 8228 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:41,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:41,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:12:41,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:44,438 INFO L124 PetriNetUnfolderBase]: 7888/12267 cut-off events. [2024-06-28 02:12:44,438 INFO L125 PetriNetUnfolderBase]: For 360500/360508 co-relation queries the response was YES. [2024-06-28 02:12:44,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79528 conditions, 12267 events. 7888/12267 cut-off events. For 360500/360508 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 78445 event pairs, 2828 based on Foata normal form. 10/12276 useless extension candidates. Maximal degree in co-relation 79363. Up to 11186 conditions per place. [2024-06-28 02:12:44,655 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 447 selfloop transitions, 72 changer transitions 0/526 dead transitions. [2024-06-28 02:12:44,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 526 transitions, 9521 flow [2024-06-28 02:12:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:12:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:12:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-28 02:12:44,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701086956521739 [2024-06-28 02:12:44,657 INFO L175 Difference]: Start difference. First operand has 352 places, 487 transitions, 8228 flow. Second operand 8 states and 173 transitions. [2024-06-28 02:12:44,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 526 transitions, 9521 flow [2024-06-28 02:12:46,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 526 transitions, 9382 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 02:12:46,586 INFO L231 Difference]: Finished difference. Result has 355 places, 491 transitions, 8340 flow [2024-06-28 02:12:46,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8089, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8340, PETRI_PLACES=355, PETRI_TRANSITIONS=491} [2024-06-28 02:12:46,587 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 305 predicate places. [2024-06-28 02:12:46,587 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 491 transitions, 8340 flow [2024-06-28 02:12:46,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:46,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:46,587 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 02:12:46,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 02:12:46,587 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:46,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:46,588 INFO L85 PathProgramCache]: Analyzing trace with hash 632185683, now seen corresponding path program 11 times [2024-06-28 02:12:46,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:46,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906013673] [2024-06-28 02:12:46,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:46,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:49,558 INFO 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 02:12:49,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:49,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906013673] [2024-06-28 02:12:49,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906013673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:49,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:49,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:12:49,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054201768] [2024-06-28 02:12:49,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:49,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:12:49,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:49,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:12:49,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:12:49,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:12:49,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 491 transitions, 8340 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:49,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:49,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:12:49,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:53,115 INFO L124 PetriNetUnfolderBase]: 7926/12314 cut-off events. [2024-06-28 02:12:53,115 INFO L125 PetriNetUnfolderBase]: For 374227/374229 co-relation queries the response was YES. [2024-06-28 02:12:53,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80308 conditions, 12314 events. 7926/12314 cut-off events. For 374227/374229 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 78691 event pairs, 2828 based on Foata normal form. 2/12315 useless extension candidates. Maximal degree in co-relation 80141. Up to 11126 conditions per place. [2024-06-28 02:12:53,303 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 393 selfloop transitions, 125 changer transitions 0/525 dead transitions. [2024-06-28 02:12:53,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 525 transitions, 9744 flow [2024-06-28 02:12:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:12:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:12:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-28 02:12:53,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492753623188406 [2024-06-28 02:12:53,304 INFO L175 Difference]: Start difference. First operand has 355 places, 491 transitions, 8340 flow. Second operand 9 states and 186 transitions. [2024-06-28 02:12:53,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 525 transitions, 9744 flow [2024-06-28 02:12:54,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 525 transitions, 9596 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 02:12:54,896 INFO L231 Difference]: Finished difference. Result has 359 places, 497 transitions, 8542 flow [2024-06-28 02:12:54,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8192, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8542, PETRI_PLACES=359, PETRI_TRANSITIONS=497} [2024-06-28 02:12:54,897 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 309 predicate places. [2024-06-28 02:12:54,897 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 497 transitions, 8542 flow [2024-06-28 02:12:54,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:54,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:54,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:54,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 02:12:54,898 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:54,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:54,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1164061687, now seen corresponding path program 12 times [2024-06-28 02:12:54,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:54,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455810489] [2024-06-28 02:12:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:54,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:57,863 INFO 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 02:12:57,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:57,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455810489] [2024-06-28 02:12:57,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455810489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:57,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:57,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:12:57,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045999782] [2024-06-28 02:12:57,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:57,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:12:57,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:57,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:12:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:12:57,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:12:57,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 497 transitions, 8542 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:57,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:57,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:12:57,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:01,470 INFO L124 PetriNetUnfolderBase]: 7942/12342 cut-off events. [2024-06-28 02:13:01,470 INFO L125 PetriNetUnfolderBase]: For 381268/381270 co-relation queries the response was YES. [2024-06-28 02:13:01,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80627 conditions, 12342 events. 7942/12342 cut-off events. For 381268/381270 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 78858 event pairs, 2718 based on Foata normal form. 2/12343 useless extension candidates. Maximal degree in co-relation 80459. Up to 10487 conditions per place. [2024-06-28 02:13:01,678 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 278 selfloop transitions, 247 changer transitions 0/532 dead transitions. [2024-06-28 02:13:01,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 532 transitions, 10123 flow [2024-06-28 02:13:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:13:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:13:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-28 02:13:01,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2024-06-28 02:13:01,680 INFO L175 Difference]: Start difference. First operand has 359 places, 497 transitions, 8542 flow. Second operand 9 states and 192 transitions. [2024-06-28 02:13:01,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 532 transitions, 10123 flow [2024-06-28 02:13:03,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 532 transitions, 9957 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 02:13:03,463 INFO L231 Difference]: Finished difference. Result has 363 places, 500 transitions, 8949 flow [2024-06-28 02:13:03,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8376, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8949, PETRI_PLACES=363, PETRI_TRANSITIONS=500} [2024-06-28 02:13:03,464 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 313 predicate places. [2024-06-28 02:13:03,464 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 500 transitions, 8949 flow [2024-06-28 02:13:03,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:03,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:03,464 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 02:13:03,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 02:13:03,465 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:03,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:03,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1176036367, now seen corresponding path program 13 times [2024-06-28 02:13:03,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:03,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127202320] [2024-06-28 02:13:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:03,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:06,278 INFO 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 02:13:06,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:06,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127202320] [2024-06-28 02:13:06,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127202320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:06,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:06,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:13:06,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977084134] [2024-06-28 02:13:06,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:06,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:13:06,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:06,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:13:06,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:13:06,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:13:06,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 500 transitions, 8949 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:06,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:06,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:13:06,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:09,838 INFO L124 PetriNetUnfolderBase]: 7936/12328 cut-off events. [2024-06-28 02:13:09,838 INFO L125 PetriNetUnfolderBase]: For 383377/383379 co-relation queries the response was YES. [2024-06-28 02:13:09,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81397 conditions, 12328 events. 7936/12328 cut-off events. For 383377/383379 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 78829 event pairs, 2827 based on Foata normal form. 2/12329 useless extension candidates. Maximal degree in co-relation 81227. Up to 11143 conditions per place. [2024-06-28 02:13:10,027 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 396 selfloop transitions, 129 changer transitions 0/532 dead transitions. [2024-06-28 02:13:10,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 532 transitions, 10133 flow [2024-06-28 02:13:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:13:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:13:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-28 02:13:10,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 02:13:10,029 INFO L175 Difference]: Start difference. First operand has 363 places, 500 transitions, 8949 flow. Second operand 12 states and 230 transitions. [2024-06-28 02:13:10,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 532 transitions, 10133 flow [2024-06-28 02:13:11,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 532 transitions, 9506 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-28 02:13:11,649 INFO L231 Difference]: Finished difference. Result has 368 places, 500 transitions, 8586 flow [2024-06-28 02:13:11,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8322, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8586, PETRI_PLACES=368, PETRI_TRANSITIONS=500} [2024-06-28 02:13:11,651 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 318 predicate places. [2024-06-28 02:13:11,652 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 500 transitions, 8586 flow [2024-06-28 02:13:11,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:11,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:11,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:11,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 02:13:11,652 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:11,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:11,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1808873719, now seen corresponding path program 10 times [2024-06-28 02:13:11,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:11,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386847451] [2024-06-28 02:13:11,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:11,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:14,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:14,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386847451] [2024-06-28 02:13:14,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386847451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:14,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:14,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:14,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921191382] [2024-06-28 02:13:14,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:14,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:14,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:14,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:14,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:13:14,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 500 transitions, 8586 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:14,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:14,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:13:14,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:18,022 INFO L124 PetriNetUnfolderBase]: 7931/12321 cut-off events. [2024-06-28 02:13:18,022 INFO L125 PetriNetUnfolderBase]: For 374436/374438 co-relation queries the response was YES. [2024-06-28 02:13:18,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80602 conditions, 12321 events. 7931/12321 cut-off events. For 374436/374438 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 78683 event pairs, 2814 based on Foata normal form. 2/12322 useless extension candidates. Maximal degree in co-relation 80432. Up to 11209 conditions per place. [2024-06-28 02:13:18,247 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 453 selfloop transitions, 74 changer transitions 0/534 dead transitions. [2024-06-28 02:13:18,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 534 transitions, 9835 flow [2024-06-28 02:13:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:13:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:13:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-28 02:13:18,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424901185770751 [2024-06-28 02:13:18,251 INFO L175 Difference]: Start difference. First operand has 368 places, 500 transitions, 8586 flow. Second operand 11 states and 215 transitions. [2024-06-28 02:13:18,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 534 transitions, 9835 flow [2024-06-28 02:13:19,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 534 transitions, 9559 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-28 02:13:19,982 INFO L231 Difference]: Finished difference. Result has 368 places, 500 transitions, 8466 flow [2024-06-28 02:13:19,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8310, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8466, PETRI_PLACES=368, PETRI_TRANSITIONS=500} [2024-06-28 02:13:19,983 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 318 predicate places. [2024-06-28 02:13:19,983 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 500 transitions, 8466 flow [2024-06-28 02:13:19,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:19,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:19,983 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 02:13:19,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 02:13:19,983 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:19,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:19,984 INFO L85 PathProgramCache]: Analyzing trace with hash -214465671, now seen corresponding path program 11 times [2024-06-28 02:13:19,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:19,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187094864] [2024-06-28 02:13:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:19,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:22,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:22,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187094864] [2024-06-28 02:13:22,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187094864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:22,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:22,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:22,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569702758] [2024-06-28 02:13:22,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:22,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:22,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:22,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:22,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:22,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:13:22,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 500 transitions, 8466 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:22,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:22,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:13:22,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:25,745 INFO L124 PetriNetUnfolderBase]: 7926/12313 cut-off events. [2024-06-28 02:13:25,745 INFO L125 PetriNetUnfolderBase]: For 371905/371907 co-relation queries the response was YES. [2024-06-28 02:13:25,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80290 conditions, 12313 events. 7926/12313 cut-off events. For 371905/371907 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 78742 event pairs, 2801 based on Foata normal form. 2/12314 useless extension candidates. Maximal degree in co-relation 80119. Up to 11208 conditions per place. [2024-06-28 02:13:25,927 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 441 selfloop transitions, 88 changer transitions 0/536 dead transitions. [2024-06-28 02:13:25,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 536 transitions, 9685 flow [2024-06-28 02:13:25,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:25,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-28 02:13:25,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031055900621118 [2024-06-28 02:13:25,929 INFO L175 Difference]: Start difference. First operand has 368 places, 500 transitions, 8466 flow. Second operand 7 states and 162 transitions. [2024-06-28 02:13:25,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 536 transitions, 9685 flow [2024-06-28 02:13:27,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 536 transitions, 9458 flow, removed 33 selfloop flow, removed 10 redundant places. [2024-06-28 02:13:27,454 INFO L231 Difference]: Finished difference. Result has 365 places, 500 transitions, 8424 flow [2024-06-28 02:13:27,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8239, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8424, PETRI_PLACES=365, PETRI_TRANSITIONS=500} [2024-06-28 02:13:27,455 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 315 predicate places. [2024-06-28 02:13:27,455 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 500 transitions, 8424 flow [2024-06-28 02:13:27,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:27,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:27,455 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 02:13:27,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 02:13:27,456 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:27,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:27,456 INFO L85 PathProgramCache]: Analyzing trace with hash -605145335, now seen corresponding path program 12 times [2024-06-28 02:13:27,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:27,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117631570] [2024-06-28 02:13:27,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:27,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:29,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:29,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117631570] [2024-06-28 02:13:29,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117631570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:29,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:29,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:29,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892867031] [2024-06-28 02:13:29,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:29,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:29,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:29,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:13:29,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 500 transitions, 8424 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:29,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:29,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:13:29,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:33,319 INFO L124 PetriNetUnfolderBase]: 7921/12267 cut-off events. [2024-06-28 02:13:33,319 INFO L125 PetriNetUnfolderBase]: For 367257/367259 co-relation queries the response was YES. [2024-06-28 02:13:33,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79855 conditions, 12267 events. 7921/12267 cut-off events. For 367257/367259 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 78070 event pairs, 2244 based on Foata normal form. 2/12268 useless extension candidates. Maximal degree in co-relation 79686. Up to 10396 conditions per place. [2024-06-28 02:13:33,488 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 428 selfloop transitions, 109 changer transitions 0/544 dead transitions. [2024-06-28 02:13:33,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 544 transitions, 9734 flow [2024-06-28 02:13:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 02:13:33,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531055900621118 [2024-06-28 02:13:33,489 INFO L175 Difference]: Start difference. First operand has 365 places, 500 transitions, 8424 flow. Second operand 7 states and 171 transitions. [2024-06-28 02:13:33,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 544 transitions, 9734 flow [2024-06-28 02:13:34,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 544 transitions, 9534 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 02:13:34,877 INFO L231 Difference]: Finished difference. Result has 366 places, 500 transitions, 8452 flow [2024-06-28 02:13:34,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8224, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8452, PETRI_PLACES=366, PETRI_TRANSITIONS=500} [2024-06-28 02:13:34,878 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 316 predicate places. [2024-06-28 02:13:34,878 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 500 transitions, 8452 flow [2024-06-28 02:13:34,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:34,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:34,878 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 02:13:34,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 02:13:34,878 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:34,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1808879361, now seen corresponding path program 14 times [2024-06-28 02:13:34,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:34,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533803853] [2024-06-28 02:13:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:34,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:37,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:37,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533803853] [2024-06-28 02:13:37,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533803853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:37,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:37,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:13:37,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305746006] [2024-06-28 02:13:37,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:37,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:13:37,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:13:37,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:13:37,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:13:37,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 500 transitions, 8452 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:37,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:37,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:13:37,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:41,787 INFO L124 PetriNetUnfolderBase]: 7937/12336 cut-off events. [2024-06-28 02:13:41,788 INFO L125 PetriNetUnfolderBase]: For 375888/375888 co-relation queries the response was YES. [2024-06-28 02:13:41,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80519 conditions, 12336 events. 7937/12336 cut-off events. For 375888/375888 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 78901 event pairs, 2766 based on Foata normal form. 2/12337 useless extension candidates. Maximal degree in co-relation 80349. Up to 10839 conditions per place. [2024-06-28 02:13:41,982 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 363 selfloop transitions, 194 changer transitions 0/564 dead transitions. [2024-06-28 02:13:41,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 564 transitions, 10388 flow [2024-06-28 02:13:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 02:13:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 02:13:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 276 transitions. [2024-06-28 02:13:41,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-28 02:13:41,991 INFO L175 Difference]: Start difference. First operand has 366 places, 500 transitions, 8452 flow. Second operand 13 states and 276 transitions. [2024-06-28 02:13:41,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 564 transitions, 10388 flow [2024-06-28 02:13:43,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 564 transitions, 10161 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 02:13:43,805 INFO L231 Difference]: Finished difference. Result has 372 places, 503 transitions, 8673 flow [2024-06-28 02:13:43,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8225, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8673, PETRI_PLACES=372, PETRI_TRANSITIONS=503} [2024-06-28 02:13:43,806 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 322 predicate places. [2024-06-28 02:13:43,806 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 503 transitions, 8673 flow [2024-06-28 02:13:43,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:43,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:43,807 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, 1] [2024-06-28 02:13:43,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 02:13:43,807 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:43,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:43,807 INFO L85 PathProgramCache]: Analyzing trace with hash -257798711, now seen corresponding path program 15 times [2024-06-28 02:13:43,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:43,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717287888] [2024-06-28 02:13:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:43,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:46,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717287888] [2024-06-28 02:13:46,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717287888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:46,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:46,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:13:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006724808] [2024-06-28 02:13:46,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:13:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:46,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:13:46,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:13:46,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:13:46,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 503 transitions, 8673 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:46,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:46,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:13:46,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:50,283 INFO L124 PetriNetUnfolderBase]: 7975/12402 cut-off events. [2024-06-28 02:13:50,283 INFO L125 PetriNetUnfolderBase]: For 391769/391771 co-relation queries the response was YES. [2024-06-28 02:13:50,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80972 conditions, 12402 events. 7975/12402 cut-off events. For 391769/391771 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 79411 event pairs, 2738 based on Foata normal form. 2/12403 useless extension candidates. Maximal degree in co-relation 80803. Up to 10735 conditions per place. [2024-06-28 02:13:50,468 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 333 selfloop transitions, 199 changer transitions 0/539 dead transitions. [2024-06-28 02:13:50,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 539 transitions, 10334 flow [2024-06-28 02:13:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-28 02:13:50,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47282608695652173 [2024-06-28 02:13:50,470 INFO L175 Difference]: Start difference. First operand has 372 places, 503 transitions, 8673 flow. Second operand 8 states and 174 transitions. [2024-06-28 02:13:50,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 539 transitions, 10334 flow [2024-06-28 02:13:52,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 539 transitions, 9731 flow, removed 16 selfloop flow, removed 14 redundant places. [2024-06-28 02:13:52,022 INFO L231 Difference]: Finished difference. Result has 366 places, 509 transitions, 8603 flow [2024-06-28 02:13:52,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8083, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8603, PETRI_PLACES=366, PETRI_TRANSITIONS=509} [2024-06-28 02:13:52,023 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 316 predicate places. [2024-06-28 02:13:52,023 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 509 transitions, 8603 flow [2024-06-28 02:13:52,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:52,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:52,023 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 02:13:52,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 02:13:52,023 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:52,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:52,024 INFO L85 PathProgramCache]: Analyzing trace with hash -269773391, now seen corresponding path program 16 times [2024-06-28 02:13:52,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:52,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923194940] [2024-06-28 02:13:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:52,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:54,686 INFO 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 02:13:54,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:54,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923194940] [2024-06-28 02:13:54,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923194940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:54,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:54,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:13:54,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847954990] [2024-06-28 02:13:54,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:54,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:13:54,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:54,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:13:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:13:54,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:13:54,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 509 transitions, 8603 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:54,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:54,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:13:54,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:58,202 INFO L124 PetriNetUnfolderBase]: 7991/12430 cut-off events. [2024-06-28 02:13:58,203 INFO L125 PetriNetUnfolderBase]: For 392123/392125 co-relation queries the response was YES. [2024-06-28 02:13:58,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80583 conditions, 12430 events. 7991/12430 cut-off events. For 392123/392125 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 79726 event pairs, 2836 based on Foata normal form. 2/12431 useless extension candidates. Maximal degree in co-relation 80415. Up to 11274 conditions per place. [2024-06-28 02:13:58,389 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 442 selfloop transitions, 103 changer transitions 0/552 dead transitions. [2024-06-28 02:13:58,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 552 transitions, 10086 flow [2024-06-28 02:13:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:13:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:13:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-28 02:13:58,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543478260869565 [2024-06-28 02:13:58,390 INFO L175 Difference]: Start difference. First operand has 366 places, 509 transitions, 8603 flow. Second operand 10 states and 209 transitions. [2024-06-28 02:13:58,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 552 transitions, 10086 flow [2024-06-28 02:14:00,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 552 transitions, 9646 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 02:14:00,137 INFO L231 Difference]: Finished difference. Result has 371 places, 512 transitions, 8428 flow [2024-06-28 02:14:00,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8169, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8428, PETRI_PLACES=371, PETRI_TRANSITIONS=512} [2024-06-28 02:14:00,138 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 321 predicate places. [2024-06-28 02:14:00,138 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 512 transitions, 8428 flow [2024-06-28 02:14:00,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:00,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:00,138 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 02:14:00,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 02:14:00,139 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:00,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash 757050831, now seen corresponding path program 17 times [2024-06-28 02:14:00,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:00,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076086443] [2024-06-28 02:14:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:03,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:03,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076086443] [2024-06-28 02:14:03,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076086443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:03,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:03,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:14:03,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607590896] [2024-06-28 02:14:03,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:03,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:14:03,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:03,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:14:03,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:14:03,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:14:03,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 512 transitions, 8428 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:03,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:03,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:14:03,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:06,858 INFO L124 PetriNetUnfolderBase]: 7985/12420 cut-off events. [2024-06-28 02:14:06,859 INFO L125 PetriNetUnfolderBase]: For 385751/385751 co-relation queries the response was YES. [2024-06-28 02:14:07,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79822 conditions, 12420 events. 7985/12420 cut-off events. For 385751/385751 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 79629 event pairs, 2772 based on Foata normal form. 2/12421 useless extension candidates. Maximal degree in co-relation 79653. Up to 10891 conditions per place. [2024-06-28 02:14:07,086 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 366 selfloop transitions, 193 changer transitions 0/566 dead transitions. [2024-06-28 02:14:07,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 566 transitions, 10122 flow [2024-06-28 02:14:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:14:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:14:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-28 02:14:07,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46195652173913043 [2024-06-28 02:14:07,088 INFO L175 Difference]: Start difference. First operand has 371 places, 512 transitions, 8428 flow. Second operand 12 states and 255 transitions. [2024-06-28 02:14:07,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 566 transitions, 10122 flow [2024-06-28 02:14:09,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 566 transitions, 9794 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-28 02:14:09,391 INFO L231 Difference]: Finished difference. Result has 373 places, 512 transitions, 8496 flow [2024-06-28 02:14:09,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8100, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8496, PETRI_PLACES=373, PETRI_TRANSITIONS=512} [2024-06-28 02:14:09,391 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 323 predicate places. [2024-06-28 02:14:09,392 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 512 transitions, 8496 flow [2024-06-28 02:14:09,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:09,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:09,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:14:09,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 02:14:09,392 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:09,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash -468891971, now seen corresponding path program 18 times [2024-06-28 02:14:09,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:09,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267423918] [2024-06-28 02:14:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:09,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:12,199 INFO 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 02:14:12,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:12,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267423918] [2024-06-28 02:14:12,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267423918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:12,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:12,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:14:12,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543279111] [2024-06-28 02:14:12,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:12,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:14:12,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:14:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:14:12,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:14:12,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 512 transitions, 8496 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:12,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:12,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:14:12,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:16,056 INFO L124 PetriNetUnfolderBase]: 7979/12412 cut-off events. [2024-06-28 02:14:16,057 INFO L125 PetriNetUnfolderBase]: For 383160/383160 co-relation queries the response was YES. [2024-06-28 02:14:16,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79964 conditions, 12412 events. 7979/12412 cut-off events. For 383160/383160 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 79532 event pairs, 2778 based on Foata normal form. 2/12413 useless extension candidates. Maximal degree in co-relation 79794. Up to 10886 conditions per place. [2024-06-28 02:14:16,492 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 355 selfloop transitions, 193 changer transitions 0/555 dead transitions. [2024-06-28 02:14:16,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 555 transitions, 10124 flow [2024-06-28 02:14:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:14:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:14:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-28 02:14:16,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673913043478261 [2024-06-28 02:14:16,494 INFO L175 Difference]: Start difference. First operand has 373 places, 512 transitions, 8496 flow. Second operand 10 states and 215 transitions. [2024-06-28 02:14:16,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 555 transitions, 10124 flow [2024-06-28 02:14:18,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 555 transitions, 9692 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-28 02:14:18,354 INFO L231 Difference]: Finished difference. Result has 372 places, 512 transitions, 8464 flow [2024-06-28 02:14:18,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8068, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8464, PETRI_PLACES=372, PETRI_TRANSITIONS=512} [2024-06-28 02:14:18,354 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 322 predicate places. [2024-06-28 02:14:18,354 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 512 transitions, 8464 flow [2024-06-28 02:14:18,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:18,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:18,354 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 02:14:18,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 02:14:18,355 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:18,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash -612759307, now seen corresponding path program 19 times [2024-06-28 02:14:18,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:18,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181596965] [2024-06-28 02:14:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:18,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:21,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:21,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181596965] [2024-06-28 02:14:21,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181596965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:21,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:21,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:14:21,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445646696] [2024-06-28 02:14:21,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:21,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:14:21,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:21,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:14:21,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:14:21,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:14:21,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 512 transitions, 8464 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:21,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:21,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:14:21,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:25,288 INFO L124 PetriNetUnfolderBase]: 7973/12403 cut-off events. [2024-06-28 02:14:25,288 INFO L125 PetriNetUnfolderBase]: For 374266/374268 co-relation queries the response was YES. [2024-06-28 02:14:25,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79697 conditions, 12403 events. 7973/12403 cut-off events. For 374266/374268 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 79521 event pairs, 2834 based on Foata normal form. 2/12404 useless extension candidates. Maximal degree in co-relation 79527. Up to 11253 conditions per place. [2024-06-28 02:14:25,479 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 436 selfloop transitions, 100 changer transitions 0/543 dead transitions. [2024-06-28 02:14:25,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 543 transitions, 9664 flow [2024-06-28 02:14:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:14:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:14:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-28 02:14:25,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673913043478261 [2024-06-28 02:14:25,481 INFO L175 Difference]: Start difference. First operand has 372 places, 512 transitions, 8464 flow. Second operand 8 states and 172 transitions. [2024-06-28 02:14:25,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 543 transitions, 9664 flow [2024-06-28 02:14:27,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 543 transitions, 9144 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-28 02:14:27,358 INFO L231 Difference]: Finished difference. Result has 368 places, 512 transitions, 8150 flow [2024-06-28 02:14:27,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7944, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8150, PETRI_PLACES=368, PETRI_TRANSITIONS=512} [2024-06-28 02:14:27,359 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 318 predicate places. [2024-06-28 02:14:27,359 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 512 transitions, 8150 flow [2024-06-28 02:14:27,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:27,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:27,360 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 02:14:27,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 02:14:27,360 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:27,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1802560011, now seen corresponding path program 20 times [2024-06-28 02:14:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:27,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124333671] [2024-06-28 02:14:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:30,193 INFO 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 02:14:30,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:30,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124333671] [2024-06-28 02:14:30,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124333671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:30,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:30,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:14:30,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595416177] [2024-06-28 02:14:30,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:30,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:14:30,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:30,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:14:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:14:30,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:14:30,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 512 transitions, 8150 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:30,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:30,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:14:30,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:34,215 INFO L124 PetriNetUnfolderBase]: 7967/12384 cut-off events. [2024-06-28 02:14:34,216 INFO L125 PetriNetUnfolderBase]: For 363055/363055 co-relation queries the response was YES. [2024-06-28 02:14:34,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78759 conditions, 12384 events. 7967/12384 cut-off events. For 363055/363055 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 79319 event pairs, 2772 based on Foata normal form. 2/12385 useless extension candidates. Maximal degree in co-relation 78589. Up to 11302 conditions per place. [2024-06-28 02:14:34,393 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 433 selfloop transitions, 102 changer transitions 0/542 dead transitions. [2024-06-28 02:14:34,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 542 transitions, 9337 flow [2024-06-28 02:14:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:14:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:14:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 02:14:34,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2024-06-28 02:14:34,395 INFO L175 Difference]: Start difference. First operand has 368 places, 512 transitions, 8150 flow. Second operand 8 states and 168 transitions. [2024-06-28 02:14:34,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 542 transitions, 9337 flow [2024-06-28 02:14:36,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 542 transitions, 9123 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 02:14:36,201 INFO L231 Difference]: Finished difference. Result has 369 places, 512 transitions, 8153 flow [2024-06-28 02:14:36,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7936, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8153, PETRI_PLACES=369, PETRI_TRANSITIONS=512} [2024-06-28 02:14:36,202 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 319 predicate places. [2024-06-28 02:14:36,202 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 512 transitions, 8153 flow [2024-06-28 02:14:36,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:36,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:36,215 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 02:14:36,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 02:14:36,215 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:36,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -91564931, now seen corresponding path program 21 times [2024-06-28 02:14:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:36,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379845974] [2024-06-28 02:14:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:39,675 INFO 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 02:14:39,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379845974] [2024-06-28 02:14:39,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379845974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:39,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:39,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:14:39,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335257998] [2024-06-28 02:14:39,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:39,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:14:39,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:14:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:14:39,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:14:39,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 512 transitions, 8153 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:39,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:39,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:14:39,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:43,603 INFO L124 PetriNetUnfolderBase]: 7983/12426 cut-off events. [2024-06-28 02:14:43,603 INFO L125 PetriNetUnfolderBase]: For 368969/368971 co-relation queries the response was YES. [2024-06-28 02:14:43,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79062 conditions, 12426 events. 7983/12426 cut-off events. For 368969/368971 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 79742 event pairs, 2697 based on Foata normal form. 2/12427 useless extension candidates. Maximal degree in co-relation 78891. Up to 10745 conditions per place. [2024-06-28 02:14:43,815 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 324 selfloop transitions, 217 changer transitions 0/548 dead transitions. [2024-06-28 02:14:43,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 548 transitions, 9620 flow [2024-06-28 02:14:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:14:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:14:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-28 02:14:43,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 02:14:43,817 INFO L175 Difference]: Start difference. First operand has 369 places, 512 transitions, 8153 flow. Second operand 10 states and 207 transitions. [2024-06-28 02:14:43,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 548 transitions, 9620 flow [2024-06-28 02:14:45,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 548 transitions, 9301 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 02:14:45,736 INFO L231 Difference]: Finished difference. Result has 372 places, 515 transitions, 8343 flow [2024-06-28 02:14:45,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7834, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8343, PETRI_PLACES=372, PETRI_TRANSITIONS=515} [2024-06-28 02:14:45,737 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 322 predicate places. [2024-06-28 02:14:45,737 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 515 transitions, 8343 flow [2024-06-28 02:14:45,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:45,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:45,737 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 02:14:45,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 02:14:45,738 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:45,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1105461817, now seen corresponding path program 22 times [2024-06-28 02:14:45,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:45,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942875751] [2024-06-28 02:14:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:45,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:48,970 INFO 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 02:14:48,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:48,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942875751] [2024-06-28 02:14:48,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942875751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:48,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:48,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:14:48,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103293411] [2024-06-28 02:14:48,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:48,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:14:48,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:48,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:14:48,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:14:49,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-06-28 02:14:49,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 515 transitions, 8343 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:49,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:49,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-06-28 02:14:49,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:53,261 INFO L124 PetriNetUnfolderBase]: 7977/12418 cut-off events. [2024-06-28 02:14:53,261 INFO L125 PetriNetUnfolderBase]: For 366649/366651 co-relation queries the response was YES. [2024-06-28 02:14:53,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79040 conditions, 12418 events. 7977/12418 cut-off events. For 366649/366651 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 79748 event pairs, 2685 based on Foata normal form. 2/12419 useless extension candidates. Maximal degree in co-relation 78869. Up to 10740 conditions per place. [2024-06-28 02:14:53,448 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 324 selfloop transitions, 219 changer transitions 0/550 dead transitions. [2024-06-28 02:14:53,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 550 transitions, 9569 flow [2024-06-28 02:14:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:14:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:14:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-28 02:14:53,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426877470355731 [2024-06-28 02:14:53,449 INFO L175 Difference]: Start difference. First operand has 372 places, 515 transitions, 8343 flow. Second operand 11 states and 224 transitions. [2024-06-28 02:14:53,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 550 transitions, 9569 flow [2024-06-28 02:14:55,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 550 transitions, 8984 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-28 02:14:55,676 INFO L231 Difference]: Finished difference. Result has 375 places, 515 transitions, 8202 flow [2024-06-28 02:14:55,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7758, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8202, PETRI_PLACES=375, PETRI_TRANSITIONS=515} [2024-06-28 02:14:55,677 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 325 predicate places. [2024-06-28 02:14:55,677 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 515 transitions, 8202 flow [2024-06-28 02:14:55,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:55,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:55,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:14:55,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 02:14:55,678 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:55,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:55,678 INFO L85 PathProgramCache]: Analyzing trace with hash -343344960, now seen corresponding path program 1 times [2024-06-28 02:14:55,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:55,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431601607] [2024-06-28 02:14:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:55,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms