./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_rmo.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/safe027_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 04:28:16,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:28:16,725 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:28:16,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:28:16,731 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:28:16,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:28:16,758 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:28:16,759 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:28:16,759 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:28:16,762 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:28:16,763 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:28:16,763 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:28:16,764 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:28:16,765 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:28:16,765 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:28:16,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:28:16,765 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:28:16,766 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:28:16,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:28:16,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:28:16,766 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:28:16,767 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:28:16,767 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:28:16,767 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:28:16,767 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:28:16,767 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:28:16,768 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:28:16,768 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:28:16,768 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:28:16,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:28:16,769 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:28:16,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:28:16,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:28:16,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:28:16,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:28:16,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:28:16,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:28:16,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:28:16,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:28:16,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:28:16,771 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:28:16,771 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:28:16,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:28:16,772 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:28:16,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:28:17,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:28:17,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:28:17,009 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:28:17,010 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:28:17,011 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_rmo.i [2024-06-28 04:28:17,985 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:28:18,158 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:28:18,159 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_rmo.i [2024-06-28 04:28:18,172 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/022206183/7cbdfdd85db642528ca4c845e5a23f77/FLAG7385318f9 [2024-06-28 04:28:18,185 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/022206183/7cbdfdd85db642528ca4c845e5a23f77 [2024-06-28 04:28:18,187 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:28:18,187 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:28:18,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_rmo.yml/witness.yml [2024-06-28 04:28:18,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:28:18,455 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:28:18,457 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:28:18,457 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:28:18,461 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:28:18,461 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:28:18" (1/2) ... [2024-06-28 04:28:18,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701952a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:28:18, skipping insertion in model container [2024-06-28 04:28:18,463 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:28:18" (1/2) ... [2024-06-28 04:28:18,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@89f1266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:28:18, skipping insertion in model container [2024-06-28 04:28:18,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:28:18" (2/2) ... [2024-06-28 04:28:18,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701952a9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:28:18, skipping insertion in model container [2024-06-28 04:28:18,464 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:28:18" (2/2) ... [2024-06-28 04:28:18,464 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:28:18,617 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:28:18,618 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] (((((((((((((((((((((((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_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 || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_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$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_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_buff0_thd4 == (_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$r_buff1_thd4 == (_Bool)0) && y$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$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0) [2024-06-28 04:28:18,619 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] (((((((((((((((((((((((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$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_buff0_thd4 == (_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$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$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$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_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)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0) [2024-06-28 04:28:18,619 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((((((((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_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 || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_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$r_buff0_thd4 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd4 == (_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_buff0_thd4 == (_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$r_buff1_thd4 == (_Bool)0) && y$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$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0) [2024-06-28 04:28:18,619 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] (((((((((((((((((((((((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$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_buff0_thd4 == (_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$r_buff1_thd4 == (_Bool)0) && __unbuffered_p0_EAX$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$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$r_buff1_thd4 == (_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)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0) [2024-06-28 04:28:18,619 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:28:18,620 INFO L106 edCorrectnessWitness]: ghost_update [L864-L864] multithreaded = 1; [2024-06-28 04:28:18,659 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:28:18,925 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:28:18,935 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:28:19,117 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:28:19,158 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:28:19,158 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:28:19 WrapperNode [2024-06-28 04:28:19,158 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:28:19,159 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:28:19,160 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:28:19,160 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:28:19,165 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,200 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,253 INFO L138 Inliner]: procedures = 176, calls = 99, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 246 [2024-06-28 04:28:19,254 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:28:19,255 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:28:19,255 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:28:19,255 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:28:19,263 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,263 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,270 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,293 INFO L175 MemorySlicer]: Split 53 memory accesses to 2 slices as follows [2, 51]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-28 04:28:19,299 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,299 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,324 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,326 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,336 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,338 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,342 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:28:19,350 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:28:19,350 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:28:19,350 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:28:19,351 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 04:28:19" (1/1) ... [2024-06-28 04:28:19,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:28:19,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:28:19,389 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 04:28:19,408 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 04:28:19,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 04:28:19,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 04:28:19,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 04:28:19,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 04:28:19,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:28:19,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:28:19,424 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:28:19,425 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:28:19,425 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:28:19,425 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:28:19,426 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:28:19,426 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:28:19,426 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-28 04:28:19,426 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-28 04:28:19,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:28:19,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 04:28:19,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:28:19,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:28:19,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:28:19,430 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 04:28:19,621 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:28:19,623 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:28:20,161 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:28:20,161 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:28:20,548 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:28:20,548 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:28:20,548 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:28:20 BoogieIcfgContainer [2024-06-28 04:28:20,548 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:28:20,550 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:28:20,550 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:28:20,553 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:28:20,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:28:18" (1/4) ... [2024-06-28 04:28:20,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7941ea51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:28:20, skipping insertion in model container [2024-06-28 04:28:20,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:28:18" (2/4) ... [2024-06-28 04:28:20,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7941ea51 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:28:20, skipping insertion in model container [2024-06-28 04:28:20,554 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 04:28:19" (3/4) ... [2024-06-28 04:28:20,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7941ea51 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:28:20, skipping insertion in model container [2024-06-28 04:28:20,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:28:20" (4/4) ... [2024-06-28 04:28:20,556 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_rmo.i [2024-06-28 04:28:20,569 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:28:20,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 04:28:20,570 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:28:20,629 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:28:20,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-28 04:28:20,696 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-28 04:28:20,696 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:28:20,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 04:28:20,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-28 04:28:20,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-28 04:28:20,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:28:20,718 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;@4df2d390, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:28:20,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 04:28:20,722 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:28:20,722 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 04:28:20,722 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:28:20,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:20,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:28:20,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:28:20,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:20,730 INFO L85 PathProgramCache]: Analyzing trace with hash 786811493, now seen corresponding path program 1 times [2024-06-28 04:28:20,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:20,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125801708] [2024-06-28 04:28:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:20,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:23,101 INFO 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 04:28:23,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:23,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125801708] [2024-06-28 04:28:23,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125801708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:23,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:23,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:28:23,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933257788] [2024-06-28 04:28:23,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:23,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:28:23,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:23,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:28:23,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:28:23,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-28 04:28:23,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 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 04:28:23,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:23,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-28 04:28:23,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:24,024 INFO L124 PetriNetUnfolderBase]: 3447/4934 cut-off events. [2024-06-28 04:28:24,024 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-28 04:28:24,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9932 conditions, 4934 events. 3447/4934 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26469 event pairs, 2102 based on Foata normal form. 2/4844 useless extension candidates. Maximal degree in co-relation 9919. Up to 4797 conditions per place. [2024-06-28 04:28:24,050 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-28 04:28:24,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 241 flow [2024-06-28 04:28:24,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:28:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:28:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-28 04:28:24,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-28 04:28:24,060 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 96 transitions. [2024-06-28 04:28:24,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 241 flow [2024-06-28 04:28:24,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 04:28:24,064 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-28 04:28:24,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-28 04:28:24,067 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-28 04:28:24,068 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-28 04:28:24,068 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 04:28:24,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:24,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:24,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:28:24,068 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:28:24,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:24,069 INFO L85 PathProgramCache]: Analyzing trace with hash 211671044, now seen corresponding path program 1 times [2024-06-28 04:28:24,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:24,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436036101] [2024-06-28 04:28:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:26,686 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 04:28:26,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:26,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436036101] [2024-06-28 04:28:26,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436036101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:26,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:26,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 04:28:26,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933503015] [2024-06-28 04:28:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:26,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 04:28:26,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:26,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 04:28:26,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 04:28:26,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-28 04:28:26,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 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 04:28:26,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:26,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-28 04:28:26,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:27,759 INFO L124 PetriNetUnfolderBase]: 3430/4977 cut-off events. [2024-06-28 04:28:27,760 INFO L125 PetriNetUnfolderBase]: For 1039/1067 co-relation queries the response was YES. [2024-06-28 04:28:27,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11562 conditions, 4977 events. 3430/4977 cut-off events. For 1039/1067 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26814 event pairs, 1986 based on Foata normal form. 6/4964 useless extension candidates. Maximal degree in co-relation 11550. Up to 4730 conditions per place. [2024-06-28 04:28:27,783 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 59 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-06-28 04:28:27,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 349 flow [2024-06-28 04:28:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:28:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:28:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-28 04:28:27,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-28 04:28:27,785 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 128 transitions. [2024-06-28 04:28:27,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 349 flow [2024-06-28 04:28:27,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 78 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:28:27,788 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-28 04:28:27,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-28 04:28:27,788 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-28 04:28:27,789 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-28 04:28:27,789 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 04:28:27,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:27,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:27,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:28:27,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:28:27,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash 882326479, now seen corresponding path program 1 times [2024-06-28 04:28:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:27,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222478178] [2024-06-28 04:28:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:27,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:31,141 INFO 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 04:28:31,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:31,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222478178] [2024-06-28 04:28:31,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222478178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:31,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:31,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:28:31,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915489679] [2024-06-28 04:28:31,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:31,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:28:31,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:31,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:28:31,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:28:31,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 04:28:31,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 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 04:28:31,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:31,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 04:28:31,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:32,682 INFO L124 PetriNetUnfolderBase]: 4421/6343 cut-off events. [2024-06-28 04:28:32,682 INFO L125 PetriNetUnfolderBase]: For 3844/3904 co-relation queries the response was YES. [2024-06-28 04:28:32,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16595 conditions, 6343 events. 4421/6343 cut-off events. For 3844/3904 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 33975 event pairs, 1887 based on Foata normal form. 24/6347 useless extension candidates. Maximal degree in co-relation 16581. Up to 5862 conditions per place. [2024-06-28 04:28:32,718 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 87 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2024-06-28 04:28:32,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 111 transitions, 552 flow [2024-06-28 04:28:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:28:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:28:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-28 04:28:32,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-28 04:28:32,723 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 184 transitions. [2024-06-28 04:28:32,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 111 transitions, 552 flow [2024-06-28 04:28:32,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 111 transitions, 524 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 04:28:32,727 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 231 flow [2024-06-28 04:28:32,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-28 04:28:32,729 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-28 04:28:32,729 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 231 flow [2024-06-28 04:28:32,729 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 04:28:32,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:32,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:32,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:28:32,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:28:32,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:32,730 INFO L85 PathProgramCache]: Analyzing trace with hash -422027617, now seen corresponding path program 1 times [2024-06-28 04:28:32,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:32,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067224087] [2024-06-28 04:28:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:32,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:34,345 INFO 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 04:28:34,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:34,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067224087] [2024-06-28 04:28:34,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067224087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:34,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:34,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:28:34,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146970577] [2024-06-28 04:28:34,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:34,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:28:34,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:34,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:28:34,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:28:34,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:28:34,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 231 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 04:28:34,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:34,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:28:34,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:35,938 INFO L124 PetriNetUnfolderBase]: 5539/7855 cut-off events. [2024-06-28 04:28:35,938 INFO L125 PetriNetUnfolderBase]: For 8059/8059 co-relation queries the response was YES. [2024-06-28 04:28:35,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22197 conditions, 7855 events. 5539/7855 cut-off events. For 8059/8059 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 41280 event pairs, 2800 based on Foata normal form. 3/7855 useless extension candidates. Maximal degree in co-relation 22180. Up to 7625 conditions per place. [2024-06-28 04:28:36,038 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 68 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-28 04:28:36,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 480 flow [2024-06-28 04:28:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:28:36,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:28:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-28 04:28:36,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-28 04:28:36,039 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 231 flow. Second operand 5 states and 122 transitions. [2024-06-28 04:28:36,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 480 flow [2024-06-28 04:28:36,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 450 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:28:36,049 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 290 flow [2024-06-28 04:28:36,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-28 04:28:36,051 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-28 04:28:36,051 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 290 flow [2024-06-28 04:28:36,051 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 04:28:36,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:36,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:36,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:28:36,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:28:36,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1782738528, now seen corresponding path program 1 times [2024-06-28 04:28:36,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:36,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554643269] [2024-06-28 04:28:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:36,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:38,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:38,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554643269] [2024-06-28 04:28:38,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554643269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:38,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:38,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:28:38,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628895876] [2024-06-28 04:28:38,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:38,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:28:38,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:38,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:28:38,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:28:38,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:28:38,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 290 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 04:28:38,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:38,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:28:38,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:40,789 INFO L124 PetriNetUnfolderBase]: 5566/7887 cut-off events. [2024-06-28 04:28:40,789 INFO L125 PetriNetUnfolderBase]: For 11592/11592 co-relation queries the response was YES. [2024-06-28 04:28:40,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24329 conditions, 7887 events. 5566/7887 cut-off events. For 11592/11592 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41498 event pairs, 2657 based on Foata normal form. 3/7885 useless extension candidates. Maximal degree in co-relation 24309. Up to 7594 conditions per place. [2024-06-28 04:28:40,862 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 85 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-28 04:28:40,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 112 transitions, 675 flow [2024-06-28 04:28:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:28:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:28:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-28 04:28:40,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2024-06-28 04:28:40,870 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 290 flow. Second operand 6 states and 155 transitions. [2024-06-28 04:28:40,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 112 transitions, 675 flow [2024-06-28 04:28:40,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 112 transitions, 665 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 04:28:40,876 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 413 flow [2024-06-28 04:28:40,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-28 04:28:40,878 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-28 04:28:40,878 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 413 flow [2024-06-28 04:28:40,878 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 04:28:40,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:40,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:40,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:28:40,879 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:28:40,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1640472736, now seen corresponding path program 2 times [2024-06-28 04:28:40,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:40,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138895795] [2024-06-28 04:28:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:40,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:43,419 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 04:28:43,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:43,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138895795] [2024-06-28 04:28:43,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138895795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:43,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:43,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:28:43,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737349061] [2024-06-28 04:28:43,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:43,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:28:43,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:43,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:28:43,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:28:43,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:28:43,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 413 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 04:28:43,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:43,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:28:43,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:45,267 INFO L124 PetriNetUnfolderBase]: 5557/7883 cut-off events. [2024-06-28 04:28:45,268 INFO L125 PetriNetUnfolderBase]: For 16885/16898 co-relation queries the response was YES. [2024-06-28 04:28:45,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26598 conditions, 7883 events. 5557/7883 cut-off events. For 16885/16898 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41526 event pairs, 2661 based on Foata normal form. 13/7891 useless extension candidates. Maximal degree in co-relation 26574. Up to 7585 conditions per place. [2024-06-28 04:28:45,313 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 78 selfloop transitions, 21 changer transitions 0/106 dead transitions. [2024-06-28 04:28:45,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 106 transitions, 694 flow [2024-06-28 04:28:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:28:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:28:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 04:28:45,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-28 04:28:45,316 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 413 flow. Second operand 6 states and 148 transitions. [2024-06-28 04:28:45,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 106 transitions, 694 flow [2024-06-28 04:28:45,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 648 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 04:28:45,333 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 427 flow [2024-06-28 04:28:45,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-28 04:28:45,334 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-28 04:28:45,334 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 427 flow [2024-06-28 04:28:45,334 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 04:28:45,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:45,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:45,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:28:45,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:28:45,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:45,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1841554050, now seen corresponding path program 1 times [2024-06-28 04:28:45,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:45,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894428751] [2024-06-28 04:28:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:45,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:47,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:47,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894428751] [2024-06-28 04:28:47,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894428751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:47,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:47,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:28:47,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682825085] [2024-06-28 04:28:47,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:47,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:28:47,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:47,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:28:47,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:28:47,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:28:47,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 427 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 04:28:47,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:47,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:28:47,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:49,122 INFO L124 PetriNetUnfolderBase]: 5542/7863 cut-off events. [2024-06-28 04:28:49,122 INFO L125 PetriNetUnfolderBase]: For 19247/19247 co-relation queries the response was YES. [2024-06-28 04:28:49,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26763 conditions, 7863 events. 5542/7863 cut-off events. For 19247/19247 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 41437 event pairs, 2523 based on Foata normal form. 6/7866 useless extension candidates. Maximal degree in co-relation 26738. Up to 7591 conditions per place. [2024-06-28 04:28:49,163 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 90 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2024-06-28 04:28:49,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 110 transitions, 733 flow [2024-06-28 04:28:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:28:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:28:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-28 04:28:49,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-28 04:28:49,165 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 427 flow. Second operand 6 states and 146 transitions. [2024-06-28 04:28:49,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 110 transitions, 733 flow [2024-06-28 04:28:49,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 700 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 04:28:49,177 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 458 flow [2024-06-28 04:28:49,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-28 04:28:49,178 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-28 04:28:49,178 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 458 flow [2024-06-28 04:28:49,178 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 04:28:49,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:49,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:49,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:28:49,178 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:28:49,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:49,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1431096518, now seen corresponding path program 1 times [2024-06-28 04:28:49,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:49,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681377624] [2024-06-28 04:28:49,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:49,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:52,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:52,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681377624] [2024-06-28 04:28:52,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681377624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:52,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:52,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:28:52,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822007790] [2024-06-28 04:28:52,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:52,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:28:52,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:52,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:28:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:28:52,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:28:52,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 458 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 04:28:52,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:52,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:28:52,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:54,715 INFO L124 PetriNetUnfolderBase]: 5607/7986 cut-off events. [2024-06-28 04:28:54,715 INFO L125 PetriNetUnfolderBase]: For 24976/24976 co-relation queries the response was YES. [2024-06-28 04:28:54,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28619 conditions, 7986 events. 5607/7986 cut-off events. For 24976/24976 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 42753 event pairs, 2297 based on Foata normal form. 7/7989 useless extension candidates. Maximal degree in co-relation 28592. Up to 7544 conditions per place. [2024-06-28 04:28:54,752 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 104 selfloop transitions, 25 changer transitions 0/136 dead transitions. [2024-06-28 04:28:54,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 136 transitions, 884 flow [2024-06-28 04:28:54,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:28:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:28:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-28 04:28:54,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-28 04:28:54,754 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 458 flow. Second operand 7 states and 186 transitions. [2024-06-28 04:28:54,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 136 transitions, 884 flow [2024-06-28 04:28:54,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 136 transitions, 846 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 04:28:54,767 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 528 flow [2024-06-28 04:28:54,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-06-28 04:28:54,767 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-28 04:28:54,767 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 528 flow [2024-06-28 04:28:54,768 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 04:28:54,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:54,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:54,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:28:54,768 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:28:54,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:54,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1430976548, now seen corresponding path program 2 times [2024-06-28 04:28:54,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:54,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106639723] [2024-06-28 04:28:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:54,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:57,567 INFO 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 04:28:57,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:57,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106639723] [2024-06-28 04:28:57,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106639723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:57,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:57,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:28:57,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488450140] [2024-06-28 04:28:57,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:57,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:28:57,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:57,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:28:57,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:28:57,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:28:57,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 528 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 04:28:57,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:57,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:28:57,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:59,624 INFO L124 PetriNetUnfolderBase]: 5634/8008 cut-off events. [2024-06-28 04:28:59,625 INFO L125 PetriNetUnfolderBase]: For 32173/32173 co-relation queries the response was YES. [2024-06-28 04:28:59,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31347 conditions, 8008 events. 5634/8008 cut-off events. For 32173/32173 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42364 event pairs, 2484 based on Foata normal form. 3/8006 useless extension candidates. Maximal degree in co-relation 31319. Up to 7601 conditions per place. [2024-06-28 04:28:59,670 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 103 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2024-06-28 04:28:59,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 144 transitions, 1094 flow [2024-06-28 04:28:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:28:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:28:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-28 04:28:59,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-28 04:28:59,673 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 528 flow. Second operand 7 states and 181 transitions. [2024-06-28 04:28:59,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 144 transitions, 1094 flow [2024-06-28 04:28:59,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 144 transitions, 998 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 04:28:59,692 INFO L231 Difference]: Finished difference. Result has 83 places, 97 transitions, 686 flow [2024-06-28 04:28:59,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=686, PETRI_PLACES=83, PETRI_TRANSITIONS=97} [2024-06-28 04:28:59,694 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-28 04:28:59,694 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 97 transitions, 686 flow [2024-06-28 04:28:59,695 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 04:28:59,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:59,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:59,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:28:59,695 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:28:59,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash 684954426, now seen corresponding path program 3 times [2024-06-28 04:28:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:59,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733563995] [2024-06-28 04:28:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:59,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:02,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:02,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733563995] [2024-06-28 04:29:02,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733563995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:02,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:02,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:29:02,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302477142] [2024-06-28 04:29:02,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:02,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:29:02,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:02,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:29:02,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:29:02,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:29:02,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 97 transitions, 686 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 04:29:02,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:02,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:29:02,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:04,790 INFO L124 PetriNetUnfolderBase]: 5625/7999 cut-off events. [2024-06-28 04:29:04,791 INFO L125 PetriNetUnfolderBase]: For 41308/41308 co-relation queries the response was YES. [2024-06-28 04:29:04,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33415 conditions, 7999 events. 5625/7999 cut-off events. For 41308/41308 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42263 event pairs, 2501 based on Foata normal form. 3/7994 useless extension candidates. Maximal degree in co-relation 33384. Up to 7592 conditions per place. [2024-06-28 04:29:04,840 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 96 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2024-06-28 04:29:04,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 138 transitions, 1057 flow [2024-06-28 04:29:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:29:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:29:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 04:29:04,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-28 04:29:04,842 INFO L175 Difference]: Start difference. First operand has 83 places, 97 transitions, 686 flow. Second operand 7 states and 174 transitions. [2024-06-28 04:29:04,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 138 transitions, 1057 flow [2024-06-28 04:29:04,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 138 transitions, 993 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-28 04:29:04,869 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 714 flow [2024-06-28 04:29:04,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=714, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-06-28 04:29:04,869 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-28 04:29:04,869 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 714 flow [2024-06-28 04:29:04,870 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 04:29:04,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:04,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:04,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:29:04,870 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:29:04,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash 655363967, now seen corresponding path program 1 times [2024-06-28 04:29:04,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:04,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584106573] [2024-06-28 04:29:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:04,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:07,144 INFO 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 04:29:07,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:07,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584106573] [2024-06-28 04:29:07,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584106573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:07,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:07,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:29:07,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108455544] [2024-06-28 04:29:07,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:07,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:29:07,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:07,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:29:07,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:29:07,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:29:07,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 714 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 04:29:07,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:07,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:29:07,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:09,765 INFO L124 PetriNetUnfolderBase]: 5958/8466 cut-off events. [2024-06-28 04:29:09,765 INFO L125 PetriNetUnfolderBase]: For 49000/49000 co-relation queries the response was YES. [2024-06-28 04:29:09,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36263 conditions, 8466 events. 5958/8466 cut-off events. For 49000/49000 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 44717 event pairs, 2504 based on Foata normal form. 18/8479 useless extension candidates. Maximal degree in co-relation 36230. Up to 7924 conditions per place. [2024-06-28 04:29:09,822 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 138 selfloop transitions, 54 changer transitions 0/199 dead transitions. [2024-06-28 04:29:09,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 199 transitions, 1616 flow [2024-06-28 04:29:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:29:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:29:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-28 04:29:09,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597902097902098 [2024-06-28 04:29:09,824 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 714 flow. Second operand 11 states and 263 transitions. [2024-06-28 04:29:09,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 199 transitions, 1616 flow [2024-06-28 04:29:09,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 199 transitions, 1530 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 04:29:09,870 INFO L231 Difference]: Finished difference. Result has 99 places, 134 transitions, 1116 flow [2024-06-28 04:29:09,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1116, PETRI_PLACES=99, PETRI_TRANSITIONS=134} [2024-06-28 04:29:09,871 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-28 04:29:09,871 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 134 transitions, 1116 flow [2024-06-28 04:29:09,871 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 04:29:09,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:09,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:09,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:29:09,872 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:29:09,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash 480285759, now seen corresponding path program 2 times [2024-06-28 04:29:09,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:09,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231027816] [2024-06-28 04:29:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:09,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:13,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:13,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231027816] [2024-06-28 04:29:13,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231027816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:13,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:13,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:29:13,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418704965] [2024-06-28 04:29:13,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:13,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:29:13,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:13,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:29:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:29:13,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:29:13,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 134 transitions, 1116 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 04:29:13,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:13,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:29:13,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:15,026 INFO L124 PetriNetUnfolderBase]: 6002/8534 cut-off events. [2024-06-28 04:29:15,027 INFO L125 PetriNetUnfolderBase]: For 66184/66184 co-relation queries the response was YES. [2024-06-28 04:29:15,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40113 conditions, 8534 events. 6002/8534 cut-off events. For 66184/66184 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 45226 event pairs, 2470 based on Foata normal form. 6/8535 useless extension candidates. Maximal degree in co-relation 40074. Up to 8063 conditions per place. [2024-06-28 04:29:15,098 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 136 selfloop transitions, 42 changer transitions 0/185 dead transitions. [2024-06-28 04:29:15,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 185 transitions, 1670 flow [2024-06-28 04:29:15,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:29:15,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:29:15,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 04:29:15,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-28 04:29:15,100 INFO L175 Difference]: Start difference. First operand has 99 places, 134 transitions, 1116 flow. Second operand 7 states and 176 transitions. [2024-06-28 04:29:15,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 185 transitions, 1670 flow [2024-06-28 04:29:15,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 185 transitions, 1612 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-28 04:29:15,181 INFO L231 Difference]: Finished difference. Result has 104 places, 139 transitions, 1226 flow [2024-06-28 04:29:15,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=104, PETRI_TRANSITIONS=139} [2024-06-28 04:29:15,182 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-28 04:29:15,182 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 139 transitions, 1226 flow [2024-06-28 04:29:15,182 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 04:29:15,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:15,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:15,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:29:15,183 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:29:15,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:15,183 INFO L85 PathProgramCache]: Analyzing trace with hash -241241601, now seen corresponding path program 3 times [2024-06-28 04:29:15,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:15,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433676361] [2024-06-28 04:29:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:15,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:18,025 INFO 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 04:29:18,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:18,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433676361] [2024-06-28 04:29:18,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433676361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:18,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:18,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:29:18,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473043875] [2024-06-28 04:29:18,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:18,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:29:18,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:29:18,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:29:18,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:29:18,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 139 transitions, 1226 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 04:29:18,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:18,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:29:18,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:20,067 INFO L124 PetriNetUnfolderBase]: 6046/8608 cut-off events. [2024-06-28 04:29:20,068 INFO L125 PetriNetUnfolderBase]: For 77153/77166 co-relation queries the response was YES. [2024-06-28 04:29:20,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42199 conditions, 8608 events. 6046/8608 cut-off events. For 77153/77166 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 45568 event pairs, 2490 based on Foata normal form. 16/8617 useless extension candidates. Maximal degree in co-relation 42158. Up to 8165 conditions per place. [2024-06-28 04:29:20,124 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 139 selfloop transitions, 40 changer transitions 0/186 dead transitions. [2024-06-28 04:29:20,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 186 transitions, 1766 flow [2024-06-28 04:29:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:29:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:29:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 04:29:20,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-28 04:29:20,126 INFO L175 Difference]: Start difference. First operand has 104 places, 139 transitions, 1226 flow. Second operand 7 states and 172 transitions. [2024-06-28 04:29:20,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 186 transitions, 1766 flow [2024-06-28 04:29:20,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1652 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:20,198 INFO L231 Difference]: Finished difference. Result has 106 places, 142 transitions, 1253 flow [2024-06-28 04:29:20,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1253, PETRI_PLACES=106, PETRI_TRANSITIONS=142} [2024-06-28 04:29:20,199 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-28 04:29:20,200 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 142 transitions, 1253 flow [2024-06-28 04:29:20,200 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 04:29:20,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:20,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:20,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:29:20,200 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:29:20,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:20,201 INFO L85 PathProgramCache]: Analyzing trace with hash -206863971, now seen corresponding path program 4 times [2024-06-28 04:29:20,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:20,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79506040] [2024-06-28 04:29:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:20,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:22,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:22,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79506040] [2024-06-28 04:29:22,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79506040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:22,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:22,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:29:22,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241837625] [2024-06-28 04:29:22,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:22,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:29:22,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:22,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:29:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:29:22,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:29:22,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 1253 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 04:29:22,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:22,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:29:22,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:25,073 INFO L124 PetriNetUnfolderBase]: 6031/8595 cut-off events. [2024-06-28 04:29:25,073 INFO L125 PetriNetUnfolderBase]: For 87165/87178 co-relation queries the response was YES. [2024-06-28 04:29:25,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43340 conditions, 8595 events. 6031/8595 cut-off events. For 87165/87178 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 45614 event pairs, 2285 based on Foata normal form. 16/8604 useless extension candidates. Maximal degree in co-relation 43298. Up to 7974 conditions per place. [2024-06-28 04:29:25,136 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 132 selfloop transitions, 50 changer transitions 0/189 dead transitions. [2024-06-28 04:29:25,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 1799 flow [2024-06-28 04:29:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:29:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:29:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 04:29:25,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-28 04:29:25,138 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 1253 flow. Second operand 7 states and 173 transitions. [2024-06-28 04:29:25,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 1799 flow [2024-06-28 04:29:25,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 189 transitions, 1668 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:25,200 INFO L231 Difference]: Finished difference. Result has 108 places, 145 transitions, 1288 flow [2024-06-28 04:29:25,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1288, PETRI_PLACES=108, PETRI_TRANSITIONS=145} [2024-06-28 04:29:25,201 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-28 04:29:25,201 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 145 transitions, 1288 flow [2024-06-28 04:29:25,201 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 04:29:25,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:25,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:25,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:29:25,202 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:29:25,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:25,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2115616269, now seen corresponding path program 1 times [2024-06-28 04:29:25,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:25,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16632460] [2024-06-28 04:29:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:25,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:28,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:28,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16632460] [2024-06-28 04:29:28,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16632460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:28,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:28,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:28,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624758155] [2024-06-28 04:29:28,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:28,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:28,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:28,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:29:28,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 145 transitions, 1288 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 04:29:28,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:28,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:29:28,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:31,675 INFO L124 PetriNetUnfolderBase]: 7473/10778 cut-off events. [2024-06-28 04:29:31,676 INFO L125 PetriNetUnfolderBase]: For 129416/129416 co-relation queries the response was YES. [2024-06-28 04:29:31,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55422 conditions, 10778 events. 7473/10778 cut-off events. For 129416/129416 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 61445 event pairs, 2129 based on Foata normal form. 78/10852 useless extension candidates. Maximal degree in co-relation 55379. Up to 8230 conditions per place. [2024-06-28 04:29:31,755 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 192 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2024-06-28 04:29:31,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 239 transitions, 2224 flow [2024-06-28 04:29:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:29:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:29:31,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-28 04:29:31,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-06-28 04:29:31,758 INFO L175 Difference]: Start difference. First operand has 108 places, 145 transitions, 1288 flow. Second operand 9 states and 248 transitions. [2024-06-28 04:29:31,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 239 transitions, 2224 flow [2024-06-28 04:29:31,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 239 transitions, 2084 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:31,889 INFO L231 Difference]: Finished difference. Result has 113 places, 151 transitions, 1357 flow [2024-06-28 04:29:31,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1357, PETRI_PLACES=113, PETRI_TRANSITIONS=151} [2024-06-28 04:29:31,890 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-28 04:29:31,890 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 151 transitions, 1357 flow [2024-06-28 04:29:31,890 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 04:29:31,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:31,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:31,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:29:31,891 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:29:31,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash -783341455, now seen corresponding path program 2 times [2024-06-28 04:29:31,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:31,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143391579] [2024-06-28 04:29:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:31,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:35,353 INFO 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 04:29:35,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:35,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143391579] [2024-06-28 04:29:35,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143391579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:35,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:35,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:35,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293244270] [2024-06-28 04:29:35,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:35,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:35,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:35,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:35,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:35,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:29:35,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 151 transitions, 1357 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 04:29:35,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:35,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:29:35,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:37,791 INFO L124 PetriNetUnfolderBase]: 7247/10474 cut-off events. [2024-06-28 04:29:37,792 INFO L125 PetriNetUnfolderBase]: For 137661/137661 co-relation queries the response was YES. [2024-06-28 04:29:37,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54164 conditions, 10474 events. 7247/10474 cut-off events. For 137661/137661 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 59625 event pairs, 2633 based on Foata normal form. 92/10562 useless extension candidates. Maximal degree in co-relation 54119. Up to 9080 conditions per place. [2024-06-28 04:29:37,855 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 178 selfloop transitions, 36 changer transitions 0/221 dead transitions. [2024-06-28 04:29:37,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 221 transitions, 2024 flow [2024-06-28 04:29:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:29:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:29:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-28 04:29:37,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168269230769231 [2024-06-28 04:29:37,857 INFO L175 Difference]: Start difference. First operand has 113 places, 151 transitions, 1357 flow. Second operand 8 states and 215 transitions. [2024-06-28 04:29:37,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 221 transitions, 2024 flow [2024-06-28 04:29:38,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 221 transitions, 1940 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:38,009 INFO L231 Difference]: Finished difference. Result has 116 places, 152 transitions, 1381 flow [2024-06-28 04:29:38,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1381, PETRI_PLACES=116, PETRI_TRANSITIONS=152} [2024-06-28 04:29:38,010 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-28 04:29:38,010 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 152 transitions, 1381 flow [2024-06-28 04:29:38,011 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 04:29:38,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:38,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:38,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:29:38,011 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:29:38,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:38,011 INFO L85 PathProgramCache]: Analyzing trace with hash -778872805, now seen corresponding path program 3 times [2024-06-28 04:29:38,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:38,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327532212] [2024-06-28 04:29:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:38,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:42,183 INFO 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 04:29:42,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:42,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327532212] [2024-06-28 04:29:42,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327532212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:42,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:42,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:42,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317076082] [2024-06-28 04:29:42,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:42,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:42,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:42,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:42,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:42,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:29:42,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 1381 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 04:29:42,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:42,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:29:42,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:44,908 INFO L124 PetriNetUnfolderBase]: 7403/10685 cut-off events. [2024-06-28 04:29:44,908 INFO L125 PetriNetUnfolderBase]: For 135299/135299 co-relation queries the response was YES. [2024-06-28 04:29:44,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55393 conditions, 10685 events. 7403/10685 cut-off events. For 135299/135299 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 60943 event pairs, 2755 based on Foata normal form. 24/10704 useless extension candidates. Maximal degree in co-relation 55346. Up to 9900 conditions per place. [2024-06-28 04:29:44,982 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 155 selfloop transitions, 51 changer transitions 0/213 dead transitions. [2024-06-28 04:29:44,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 213 transitions, 2029 flow [2024-06-28 04:29:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:29:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:29:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 04:29:44,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-28 04:29:44,985 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 1381 flow. Second operand 8 states and 204 transitions. [2024-06-28 04:29:44,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 213 transitions, 2029 flow [2024-06-28 04:29:45,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 213 transitions, 1962 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 04:29:45,131 INFO L231 Difference]: Finished difference. Result has 118 places, 154 transitions, 1476 flow [2024-06-28 04:29:45,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1476, PETRI_PLACES=118, PETRI_TRANSITIONS=154} [2024-06-28 04:29:45,132 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-28 04:29:45,132 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 154 transitions, 1476 flow [2024-06-28 04:29:45,132 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 04:29:45,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:45,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:45,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:29:45,133 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:29:45,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2003958331, now seen corresponding path program 1 times [2024-06-28 04:29:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:45,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299070437] [2024-06-28 04:29:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:45,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:48,441 INFO 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 04:29:48,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:48,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299070437] [2024-06-28 04:29:48,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299070437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:48,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:48,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:48,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494382789] [2024-06-28 04:29:48,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:48,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:48,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:48,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:29:48,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 154 transitions, 1476 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 04:29:48,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:48,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:29:48,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:50,833 INFO L124 PetriNetUnfolderBase]: 7515/10877 cut-off events. [2024-06-28 04:29:50,834 INFO L125 PetriNetUnfolderBase]: For 151057/151057 co-relation queries the response was YES. [2024-06-28 04:29:50,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57492 conditions, 10877 events. 7515/10877 cut-off events. For 151057/151057 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 62546 event pairs, 2737 based on Foata normal form. 18/10890 useless extension candidates. Maximal degree in co-relation 57444. Up to 9632 conditions per place. [2024-06-28 04:29:51,043 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 155 selfloop transitions, 57 changer transitions 0/219 dead transitions. [2024-06-28 04:29:51,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 219 transitions, 2171 flow [2024-06-28 04:29:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:29:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:29:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 04:29:51,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-28 04:29:51,046 INFO L175 Difference]: Start difference. First operand has 118 places, 154 transitions, 1476 flow. Second operand 8 states and 206 transitions. [2024-06-28 04:29:51,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 219 transitions, 2171 flow [2024-06-28 04:29:51,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 219 transitions, 2049 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 04:29:51,179 INFO L231 Difference]: Finished difference. Result has 121 places, 157 transitions, 1569 flow [2024-06-28 04:29:51,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1569, PETRI_PLACES=121, PETRI_TRANSITIONS=157} [2024-06-28 04:29:51,179 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-28 04:29:51,180 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 157 transitions, 1569 flow [2024-06-28 04:29:51,180 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 04:29:51,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:51,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:51,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:29:51,180 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:29:51,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1111262201, now seen corresponding path program 4 times [2024-06-28 04:29:51,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:51,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516723628] [2024-06-28 04:29:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:51,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:54,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:54,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516723628] [2024-06-28 04:29:54,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516723628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:54,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:54,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:29:54,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620482337] [2024-06-28 04:29:54,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:54,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:29:54,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:54,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:29:54,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:29:54,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:29:54,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 157 transitions, 1569 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 04:29:54,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:54,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:29:54,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:57,315 INFO L124 PetriNetUnfolderBase]: 7612/11029 cut-off events. [2024-06-28 04:29:57,316 INFO L125 PetriNetUnfolderBase]: For 167858/167858 co-relation queries the response was YES. [2024-06-28 04:29:57,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59495 conditions, 11029 events. 7612/11029 cut-off events. For 167858/167858 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 63596 event pairs, 2815 based on Foata normal form. 24/11043 useless extension candidates. Maximal degree in co-relation 59445. Up to 10223 conditions per place. [2024-06-28 04:29:57,413 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 158 selfloop transitions, 50 changer transitions 0/215 dead transitions. [2024-06-28 04:29:57,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 215 transitions, 2225 flow [2024-06-28 04:29:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:29:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:29:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 04:29:57,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-28 04:29:57,415 INFO L175 Difference]: Start difference. First operand has 121 places, 157 transitions, 1569 flow. Second operand 8 states and 200 transitions. [2024-06-28 04:29:57,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 215 transitions, 2225 flow [2024-06-28 04:29:57,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 215 transitions, 2093 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 04:29:57,601 INFO L231 Difference]: Finished difference. Result has 124 places, 159 transitions, 1605 flow [2024-06-28 04:29:57,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1605, PETRI_PLACES=124, PETRI_TRANSITIONS=159} [2024-06-28 04:29:57,602 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-28 04:29:57,602 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 159 transitions, 1605 flow [2024-06-28 04:29:57,603 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 04:29:57,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:57,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:57,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:29:57,603 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:29:57,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:57,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1940977821, now seen corresponding path program 2 times [2024-06-28 04:29:57,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:57,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711723430] [2024-06-28 04:29:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:57,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:01,149 INFO 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 04:30:01,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:01,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711723430] [2024-06-28 04:30:01,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711723430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:01,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:01,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:01,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419148678] [2024-06-28 04:30:01,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:01,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:01,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:01,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:01,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:01,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:30:01,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 159 transitions, 1605 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 04:30:01,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:01,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:30:01,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:03,595 INFO L124 PetriNetUnfolderBase]: 7724/11221 cut-off events. [2024-06-28 04:30:03,595 INFO L125 PetriNetUnfolderBase]: For 183391/183391 co-relation queries the response was YES. [2024-06-28 04:30:03,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61228 conditions, 11221 events. 7724/11221 cut-off events. For 183391/183391 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 65031 event pairs, 2815 based on Foata normal form. 18/11229 useless extension candidates. Maximal degree in co-relation 61177. Up to 10205 conditions per place. [2024-06-28 04:30:03,705 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 161 selfloop transitions, 53 changer transitions 0/221 dead transitions. [2024-06-28 04:30:03,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 221 transitions, 2293 flow [2024-06-28 04:30:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-28 04:30:03,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-28 04:30:03,707 INFO L175 Difference]: Start difference. First operand has 124 places, 159 transitions, 1605 flow. Second operand 8 states and 203 transitions. [2024-06-28 04:30:03,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 221 transitions, 2293 flow [2024-06-28 04:30:03,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 221 transitions, 2165 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:03,909 INFO L231 Difference]: Finished difference. Result has 126 places, 161 transitions, 1654 flow [2024-06-28 04:30:03,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1654, PETRI_PLACES=126, PETRI_TRANSITIONS=161} [2024-06-28 04:30:03,909 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-28 04:30:03,910 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 161 transitions, 1654 flow [2024-06-28 04:30:03,910 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 04:30:03,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:03,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:03,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:30:03,910 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:30:03,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:03,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2117814115, now seen corresponding path program 3 times [2024-06-28 04:30:03,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:03,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534885638] [2024-06-28 04:30:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:03,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:07,374 INFO 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 04:30:07,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:07,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534885638] [2024-06-28 04:30:07,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534885638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:07,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:07,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:07,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259524870] [2024-06-28 04:30:07,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:07,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:07,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:07,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:30:07,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 161 transitions, 1654 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 04:30:07,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:07,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:30:07,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:10,062 INFO L124 PetriNetUnfolderBase]: 7685/11164 cut-off events. [2024-06-28 04:30:10,062 INFO L125 PetriNetUnfolderBase]: For 191874/191874 co-relation queries the response was YES. [2024-06-28 04:30:10,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61215 conditions, 11164 events. 7685/11164 cut-off events. For 191874/191874 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 63891 event pairs, 2500 based on Foata normal form. 18/11172 useless extension candidates. Maximal degree in co-relation 61163. Up to 9286 conditions per place. [2024-06-28 04:30:10,166 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 146 selfloop transitions, 68 changer transitions 0/221 dead transitions. [2024-06-28 04:30:10,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 221 transitions, 2294 flow [2024-06-28 04:30:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:10,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 04:30:10,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-28 04:30:10,168 INFO L175 Difference]: Start difference. First operand has 126 places, 161 transitions, 1654 flow. Second operand 8 states and 202 transitions. [2024-06-28 04:30:10,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 221 transitions, 2294 flow [2024-06-28 04:30:10,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 221 transitions, 2147 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:10,364 INFO L231 Difference]: Finished difference. Result has 127 places, 162 transitions, 1674 flow [2024-06-28 04:30:10,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1674, PETRI_PLACES=127, PETRI_TRANSITIONS=162} [2024-06-28 04:30:10,365 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-28 04:30:10,365 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 162 transitions, 1674 flow [2024-06-28 04:30:10,365 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 04:30:10,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:10,365 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 04:30:10,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:30:10,365 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:30:10,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:10,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1979037284, now seen corresponding path program 1 times [2024-06-28 04:30:10,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:10,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393737486] [2024-06-28 04:30:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:10,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:12,371 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 04:30:12,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:12,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393737486] [2024-06-28 04:30:12,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393737486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:12,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:12,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:12,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746545313] [2024-06-28 04:30:12,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:12,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:12,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:12,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:12,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:30:12,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 162 transitions, 1674 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 04:30:12,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:12,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:30:12,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:14,661 INFO L124 PetriNetUnfolderBase]: 7723/11231 cut-off events. [2024-06-28 04:30:14,661 INFO L125 PetriNetUnfolderBase]: For 203653/203653 co-relation queries the response was YES. [2024-06-28 04:30:14,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62381 conditions, 11231 events. 7723/11231 cut-off events. For 203653/203653 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 65200 event pairs, 2814 based on Foata normal form. 4/11230 useless extension candidates. Maximal degree in co-relation 62328. Up to 10733 conditions per place. [2024-06-28 04:30:14,754 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 174 selfloop transitions, 21 changer transitions 0/202 dead transitions. [2024-06-28 04:30:14,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 202 transitions, 2366 flow [2024-06-28 04:30:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-28 04:30:14,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-28 04:30:14,756 INFO L175 Difference]: Start difference. First operand has 127 places, 162 transitions, 1674 flow. Second operand 6 states and 147 transitions. [2024-06-28 04:30:14,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 202 transitions, 2366 flow [2024-06-28 04:30:14,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 202 transitions, 2185 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:14,933 INFO L231 Difference]: Finished difference. Result has 127 places, 170 transitions, 1680 flow [2024-06-28 04:30:14,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1680, PETRI_PLACES=127, PETRI_TRANSITIONS=170} [2024-06-28 04:30:14,935 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-28 04:30:14,940 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 170 transitions, 1680 flow [2024-06-28 04:30:14,940 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 04:30:14,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:14,940 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 04:30:14,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:30:14,941 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:30:14,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:14,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1994408324, now seen corresponding path program 2 times [2024-06-28 04:30:14,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:14,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892507608] [2024-06-28 04:30:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:14,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:16,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:16,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892507608] [2024-06-28 04:30:16,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892507608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:16,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:16,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:16,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620852127] [2024-06-28 04:30:16,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:16,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:16,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:16,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:30:16,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 170 transitions, 1680 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 04:30:16,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:16,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:30:16,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:18,994 INFO L124 PetriNetUnfolderBase]: 7709/11211 cut-off events. [2024-06-28 04:30:18,994 INFO L125 PetriNetUnfolderBase]: For 214482/214482 co-relation queries the response was YES. [2024-06-28 04:30:19,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63302 conditions, 11211 events. 7709/11211 cut-off events. For 214482/214482 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 65061 event pairs, 2810 based on Foata normal form. 4/11210 useless extension candidates. Maximal degree in co-relation 63248. Up to 10743 conditions per place. [2024-06-28 04:30:19,099 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 170 selfloop transitions, 17 changer transitions 0/194 dead transitions. [2024-06-28 04:30:19,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 194 transitions, 2122 flow [2024-06-28 04:30:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:30:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:30:19,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-28 04:30:19,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-06-28 04:30:19,104 INFO L175 Difference]: Start difference. First operand has 127 places, 170 transitions, 1680 flow. Second operand 5 states and 124 transitions. [2024-06-28 04:30:19,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 194 transitions, 2122 flow [2024-06-28 04:30:19,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 194 transitions, 2016 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-28 04:30:19,305 INFO L231 Difference]: Finished difference. Result has 130 places, 170 transitions, 1622 flow [2024-06-28 04:30:19,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1622, PETRI_PLACES=130, PETRI_TRANSITIONS=170} [2024-06-28 04:30:19,305 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-28 04:30:19,305 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 170 transitions, 1622 flow [2024-06-28 04:30:19,306 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 04:30:19,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:19,306 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 04:30:19,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:30:19,306 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:30:19,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1697333617, now seen corresponding path program 1 times [2024-06-28 04:30:19,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:19,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933869184] [2024-06-28 04:30:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:19,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:22,226 INFO 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 04:30:22,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:22,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933869184] [2024-06-28 04:30:22,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933869184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:22,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:22,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:22,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227870459] [2024-06-28 04:30:22,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:22,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:22,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:22,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:22,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:22,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-28 04:30:22,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 170 transitions, 1622 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 04:30:22,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:22,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-28 04:30:22,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:24,416 INFO L124 PetriNetUnfolderBase]: 7300/10746 cut-off events. [2024-06-28 04:30:24,417 INFO L125 PetriNetUnfolderBase]: For 222040/222060 co-relation queries the response was YES. [2024-06-28 04:30:24,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60804 conditions, 10746 events. 7300/10746 cut-off events. For 222040/222060 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 63698 event pairs, 2757 based on Foata normal form. 4/10699 useless extension candidates. Maximal degree in co-relation 60748. Up to 10040 conditions per place. [2024-06-28 04:30:24,500 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 157 selfloop transitions, 12 changer transitions 0/193 dead transitions. [2024-06-28 04:30:24,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 193 transitions, 2074 flow [2024-06-28 04:30:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:30:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:30:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-28 04:30:24,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-28 04:30:24,502 INFO L175 Difference]: Start difference. First operand has 130 places, 170 transitions, 1622 flow. Second operand 5 states and 122 transitions. [2024-06-28 04:30:24,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 193 transitions, 2074 flow [2024-06-28 04:30:24,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 193 transitions, 2040 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:24,687 INFO L231 Difference]: Finished difference. Result has 131 places, 173 transitions, 1684 flow [2024-06-28 04:30:24,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1684, PETRI_PLACES=131, PETRI_TRANSITIONS=173} [2024-06-28 04:30:24,688 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-28 04:30:24,688 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 173 transitions, 1684 flow [2024-06-28 04:30:24,688 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 04:30:24,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:24,689 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 04:30:24,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:30:24,689 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:30:24,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1362530945, now seen corresponding path program 1 times [2024-06-28 04:30:24,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:24,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904764074] [2024-06-28 04:30:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:24,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:27,808 INFO 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 04:30:27,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:27,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904764074] [2024-06-28 04:30:27,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904764074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:27,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:27,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:27,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625276716] [2024-06-28 04:30:27,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:27,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:27,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:27,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:30:27,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 173 transitions, 1684 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 04:30:27,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:27,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:30:27,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:30,296 INFO L124 PetriNetUnfolderBase]: 7787/11361 cut-off events. [2024-06-28 04:30:30,297 INFO L125 PetriNetUnfolderBase]: For 246949/246949 co-relation queries the response was YES. [2024-06-28 04:30:30,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65945 conditions, 11361 events. 7787/11361 cut-off events. For 246949/246949 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 66373 event pairs, 2769 based on Foata normal form. 4/11357 useless extension candidates. Maximal degree in co-relation 65888. Up to 10548 conditions per place. [2024-06-28 04:30:30,392 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 169 selfloop transitions, 58 changer transitions 0/234 dead transitions. [2024-06-28 04:30:30,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 234 transitions, 2708 flow [2024-06-28 04:30:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-28 04:30:30,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-28 04:30:30,395 INFO L175 Difference]: Start difference. First operand has 131 places, 173 transitions, 1684 flow. Second operand 7 states and 181 transitions. [2024-06-28 04:30:30,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 234 transitions, 2708 flow [2024-06-28 04:30:30,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 234 transitions, 2636 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:30,649 INFO L231 Difference]: Finished difference. Result has 135 places, 185 transitions, 1981 flow [2024-06-28 04:30:30,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1981, PETRI_PLACES=135, PETRI_TRANSITIONS=185} [2024-06-28 04:30:30,650 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-28 04:30:30,650 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 185 transitions, 1981 flow [2024-06-28 04:30:30,650 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 04:30:30,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:30,650 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 04:30:30,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:30:30,651 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:30:30,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:30,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1367292545, now seen corresponding path program 2 times [2024-06-28 04:30:30,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:30,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973111659] [2024-06-28 04:30:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:30,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:33,889 INFO 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 04:30:33,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:33,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973111659] [2024-06-28 04:30:33,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973111659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:33,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:33,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:33,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034669232] [2024-06-28 04:30:33,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:33,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:33,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:33,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:30:33,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 185 transitions, 1981 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 04:30:33,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:33,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:30:33,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:36,520 INFO L124 PetriNetUnfolderBase]: 7939/11568 cut-off events. [2024-06-28 04:30:36,521 INFO L125 PetriNetUnfolderBase]: For 270808/270808 co-relation queries the response was YES. [2024-06-28 04:30:36,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69441 conditions, 11568 events. 7939/11568 cut-off events. For 270808/270808 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 67374 event pairs, 2635 based on Foata normal form. 4/11568 useless extension candidates. Maximal degree in co-relation 69383. Up to 10841 conditions per place. [2024-06-28 04:30:36,613 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 195 selfloop transitions, 41 changer transitions 0/243 dead transitions. [2024-06-28 04:30:36,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 243 transitions, 2768 flow [2024-06-28 04:30:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 04:30:36,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-28 04:30:36,616 INFO L175 Difference]: Start difference. First operand has 135 places, 185 transitions, 1981 flow. Second operand 7 states and 173 transitions. [2024-06-28 04:30:36,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 243 transitions, 2768 flow [2024-06-28 04:30:36,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 243 transitions, 2651 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-28 04:30:36,886 INFO L231 Difference]: Finished difference. Result has 140 places, 200 transitions, 2158 flow [2024-06-28 04:30:36,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2158, PETRI_PLACES=140, PETRI_TRANSITIONS=200} [2024-06-28 04:30:36,887 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-28 04:30:36,887 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 200 transitions, 2158 flow [2024-06-28 04:30:36,887 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 04:30:36,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:36,887 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 04:30:36,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:30:36,888 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:30:36,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:36,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1736326527, now seen corresponding path program 3 times [2024-06-28 04:30:36,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:36,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953864090] [2024-06-28 04:30:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:36,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:39,808 INFO 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 04:30:39,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:39,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953864090] [2024-06-28 04:30:39,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953864090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:39,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:39,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:39,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768933112] [2024-06-28 04:30:39,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:39,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:39,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:39,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:39,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:39,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:30:39,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 200 transitions, 2158 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 04:30:39,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:39,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:30:39,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:42,554 INFO L124 PetriNetUnfolderBase]: 7977/11623 cut-off events. [2024-06-28 04:30:42,554 INFO L125 PetriNetUnfolderBase]: For 284980/284999 co-relation queries the response was YES. [2024-06-28 04:30:42,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70110 conditions, 11623 events. 7977/11623 cut-off events. For 284980/284999 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 67808 event pairs, 2757 based on Foata normal form. 18/11632 useless extension candidates. Maximal degree in co-relation 70050. Up to 10738 conditions per place. [2024-06-28 04:30:42,643 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 176 selfloop transitions, 68 changer transitions 0/251 dead transitions. [2024-06-28 04:30:42,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 251 transitions, 3078 flow [2024-06-28 04:30:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 04:30:42,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-28 04:30:42,645 INFO L175 Difference]: Start difference. First operand has 140 places, 200 transitions, 2158 flow. Second operand 7 states and 177 transitions. [2024-06-28 04:30:42,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 251 transitions, 3078 flow [2024-06-28 04:30:42,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 251 transitions, 2969 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:42,950 INFO L231 Difference]: Finished difference. Result has 144 places, 204 transitions, 2275 flow [2024-06-28 04:30:42,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2275, PETRI_PLACES=144, PETRI_TRANSITIONS=204} [2024-06-28 04:30:42,951 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-28 04:30:42,951 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 204 transitions, 2275 flow [2024-06-28 04:30:42,951 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 04:30:42,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:42,951 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 04:30:42,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:30:42,952 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:30:42,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1725851007, now seen corresponding path program 4 times [2024-06-28 04:30:42,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:42,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854518380] [2024-06-28 04:30:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:42,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:45,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:45,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854518380] [2024-06-28 04:30:45,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854518380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:45,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:45,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084943593] [2024-06-28 04:30:45,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:45,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:45,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:45,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:45,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:45,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:30:45,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 204 transitions, 2275 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 04:30:45,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:45,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:30:45,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:48,190 INFO L124 PetriNetUnfolderBase]: 8015/11677 cut-off events. [2024-06-28 04:30:48,190 INFO L125 PetriNetUnfolderBase]: For 300697/300716 co-relation queries the response was YES. [2024-06-28 04:30:48,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71159 conditions, 11677 events. 8015/11677 cut-off events. For 300697/300716 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 68084 event pairs, 2757 based on Foata normal form. 18/11685 useless extension candidates. Maximal degree in co-relation 71098. Up to 10772 conditions per place. [2024-06-28 04:30:48,290 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 167 selfloop transitions, 74 changer transitions 0/248 dead transitions. [2024-06-28 04:30:48,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 248 transitions, 3071 flow [2024-06-28 04:30:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 04:30:48,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697802197802198 [2024-06-28 04:30:48,292 INFO L175 Difference]: Start difference. First operand has 144 places, 204 transitions, 2275 flow. Second operand 7 states and 171 transitions. [2024-06-28 04:30:48,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 248 transitions, 3071 flow [2024-06-28 04:30:48,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 248 transitions, 2829 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:48,567 INFO L231 Difference]: Finished difference. Result has 145 places, 208 transitions, 2278 flow [2024-06-28 04:30:48,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2278, PETRI_PLACES=145, PETRI_TRANSITIONS=208} [2024-06-28 04:30:48,567 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-28 04:30:48,567 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 208 transitions, 2278 flow [2024-06-28 04:30:48,568 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 04:30:48,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:48,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:48,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:30:48,568 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:30:48,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1065335075, now seen corresponding path program 5 times [2024-06-28 04:30:48,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:48,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791663392] [2024-06-28 04:30:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:48,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:51,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:51,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791663392] [2024-06-28 04:30:51,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791663392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:51,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:51,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:51,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291321191] [2024-06-28 04:30:51,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:51,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:51,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:51,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:30:51,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 208 transitions, 2278 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 04:30:51,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:51,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:30:51,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:54,320 INFO L124 PetriNetUnfolderBase]: 8001/11650 cut-off events. [2024-06-28 04:30:54,321 INFO L125 PetriNetUnfolderBase]: For 311121/311121 co-relation queries the response was YES. [2024-06-28 04:30:54,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71072 conditions, 11650 events. 8001/11650 cut-off events. For 311121/311121 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 67882 event pairs, 2638 based on Foata normal form. 4/11650 useless extension candidates. Maximal degree in co-relation 71011. Up to 10696 conditions per place. [2024-06-28 04:30:54,428 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 182 selfloop transitions, 82 changer transitions 0/271 dead transitions. [2024-06-28 04:30:54,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 271 transitions, 3108 flow [2024-06-28 04:30:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-28 04:30:54,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048076923076923 [2024-06-28 04:30:54,430 INFO L175 Difference]: Start difference. First operand has 145 places, 208 transitions, 2278 flow. Second operand 8 states and 210 transitions. [2024-06-28 04:30:54,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 271 transitions, 3108 flow [2024-06-28 04:30:54,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 271 transitions, 2897 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:54,958 INFO L231 Difference]: Finished difference. Result has 149 places, 208 transitions, 2274 flow [2024-06-28 04:30:54,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2274, PETRI_PLACES=149, PETRI_TRANSITIONS=208} [2024-06-28 04:30:54,959 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2024-06-28 04:30:54,959 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 208 transitions, 2274 flow [2024-06-28 04:30:54,960 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 04:30:54,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:54,960 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 04:30:54,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:30:54,960 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:30:54,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:54,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1071048995, now seen corresponding path program 6 times [2024-06-28 04:30:54,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:54,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019705734] [2024-06-28 04:30:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:54,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:57,700 INFO 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 04:30:57,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:57,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019705734] [2024-06-28 04:30:57,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019705734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:57,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:57,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:57,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164428702] [2024-06-28 04:30:57,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:57,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:57,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:57,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:57,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:57,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:30:57,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 208 transitions, 2274 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 04:30:57,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:57,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:30:57,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:00,145 INFO L124 PetriNetUnfolderBase]: 7987/11630 cut-off events. [2024-06-28 04:31:00,146 INFO L125 PetriNetUnfolderBase]: For 325407/325413 co-relation queries the response was YES. [2024-06-28 04:31:00,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71361 conditions, 11630 events. 7987/11630 cut-off events. For 325407/325413 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67675 event pairs, 2712 based on Foata normal form. 4/11620 useless extension candidates. Maximal degree in co-relation 71299. Up to 10684 conditions per place. [2024-06-28 04:31:00,249 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 158 selfloop transitions, 80 changer transitions 0/245 dead transitions. [2024-06-28 04:31:00,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 245 transitions, 2866 flow [2024-06-28 04:31:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:31:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:31:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-28 04:31:00,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-28 04:31:00,251 INFO L175 Difference]: Start difference. First operand has 149 places, 208 transitions, 2274 flow. Second operand 6 states and 154 transitions. [2024-06-28 04:31:00,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 245 transitions, 2866 flow [2024-06-28 04:31:00,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 245 transitions, 2585 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-28 04:31:00,641 INFO L231 Difference]: Finished difference. Result has 146 places, 208 transitions, 2171 flow [2024-06-28 04:31:00,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2171, PETRI_PLACES=146, PETRI_TRANSITIONS=208} [2024-06-28 04:31:00,641 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-28 04:31:00,641 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 208 transitions, 2171 flow [2024-06-28 04:31:00,642 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 04:31:00,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:00,642 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 04:31:00,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:31:00,642 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:31:00,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:00,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1728700031, now seen corresponding path program 1 times [2024-06-28 04:31:00,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:00,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016827389] [2024-06-28 04:31:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:00,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:03,097 INFO 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 04:31:03,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:03,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016827389] [2024-06-28 04:31:03,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016827389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:03,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:03,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:03,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115568008] [2024-06-28 04:31:03,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:03,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:03,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:03,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:03,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:31:03,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 208 transitions, 2171 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 04:31:03,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:03,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:31:03,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:05,658 INFO L124 PetriNetUnfolderBase]: 8219/11982 cut-off events. [2024-06-28 04:31:05,658 INFO L125 PetriNetUnfolderBase]: For 326039/326039 co-relation queries the response was YES. [2024-06-28 04:31:05,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72985 conditions, 11982 events. 8219/11982 cut-off events. For 326039/326039 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70262 event pairs, 2700 based on Foata normal form. 16/11993 useless extension candidates. Maximal degree in co-relation 72923. Up to 11055 conditions per place. [2024-06-28 04:31:05,747 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 227 selfloop transitions, 27 changer transitions 0/261 dead transitions. [2024-06-28 04:31:05,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 261 transitions, 3065 flow [2024-06-28 04:31:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 04:31:05,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-28 04:31:05,749 INFO L175 Difference]: Start difference. First operand has 146 places, 208 transitions, 2171 flow. Second operand 7 states and 176 transitions. [2024-06-28 04:31:05,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 261 transitions, 3065 flow [2024-06-28 04:31:06,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 261 transitions, 2888 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:06,086 INFO L231 Difference]: Finished difference. Result has 147 places, 212 transitions, 2171 flow [2024-06-28 04:31:06,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2171, PETRI_PLACES=147, PETRI_TRANSITIONS=212} [2024-06-28 04:31:06,087 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-28 04:31:06,087 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 212 transitions, 2171 flow [2024-06-28 04:31:06,087 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 04:31:06,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:06,088 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 04:31:06,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:31:06,088 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:31:06,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash -815610621, now seen corresponding path program 2 times [2024-06-28 04:31:06,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:06,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463702816] [2024-06-28 04:31:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:06,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:08,417 INFO 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 04:31:08,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:08,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463702816] [2024-06-28 04:31:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463702816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:08,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:08,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:08,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391712883] [2024-06-28 04:31:08,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:08,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:08,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:08,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:08,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:08,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:31:08,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 212 transitions, 2171 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 04:31:08,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:08,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:31:08,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:10,934 INFO L124 PetriNetUnfolderBase]: 8367/12187 cut-off events. [2024-06-28 04:31:10,935 INFO L125 PetriNetUnfolderBase]: For 334200/334200 co-relation queries the response was YES. [2024-06-28 04:31:11,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74604 conditions, 12187 events. 8367/12187 cut-off events. For 334200/334200 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 71425 event pairs, 2848 based on Foata normal form. 20/12202 useless extension candidates. Maximal degree in co-relation 74542. Up to 11477 conditions per place. [2024-06-28 04:31:11,068 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 224 selfloop transitions, 23 changer transitions 0/254 dead transitions. [2024-06-28 04:31:11,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 254 transitions, 2855 flow [2024-06-28 04:31:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-28 04:31:11,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-28 04:31:11,070 INFO L175 Difference]: Start difference. First operand has 147 places, 212 transitions, 2171 flow. Second operand 7 states and 168 transitions. [2024-06-28 04:31:11,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 254 transitions, 2855 flow [2024-06-28 04:31:11,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 254 transitions, 2792 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:11,481 INFO L231 Difference]: Finished difference. Result has 151 places, 214 transitions, 2224 flow [2024-06-28 04:31:11,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2224, PETRI_PLACES=151, PETRI_TRANSITIONS=214} [2024-06-28 04:31:11,482 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-28 04:31:11,482 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 214 transitions, 2224 flow [2024-06-28 04:31:11,482 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 04:31:11,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:11,482 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 04:31:11,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:31:11,483 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:31:11,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1695509645, now seen corresponding path program 3 times [2024-06-28 04:31:11,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:11,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242536447] [2024-06-28 04:31:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:13,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:13,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242536447] [2024-06-28 04:31:13,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242536447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:13,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:13,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175244305] [2024-06-28 04:31:13,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:13,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:13,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:13,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:31:13,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 214 transitions, 2224 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 04:31:13,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:13,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:31:13,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:16,350 INFO L124 PetriNetUnfolderBase]: 8311/12102 cut-off events. [2024-06-28 04:31:16,351 INFO L125 PetriNetUnfolderBase]: For 339521/339521 co-relation queries the response was YES. [2024-06-28 04:31:16,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73975 conditions, 12102 events. 8311/12102 cut-off events. For 339521/339521 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70787 event pairs, 2718 based on Foata normal form. 20/12117 useless extension candidates. Maximal degree in co-relation 73911. Up to 11385 conditions per place. [2024-06-28 04:31:16,449 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 223 selfloop transitions, 22 changer transitions 0/252 dead transitions. [2024-06-28 04:31:16,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 252 transitions, 2842 flow [2024-06-28 04:31:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:31:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:31:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-28 04:31:16,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-28 04:31:16,451 INFO L175 Difference]: Start difference. First operand has 151 places, 214 transitions, 2224 flow. Second operand 6 states and 152 transitions. [2024-06-28 04:31:16,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 252 transitions, 2842 flow [2024-06-28 04:31:16,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 252 transitions, 2752 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:16,924 INFO L231 Difference]: Finished difference. Result has 152 places, 214 transitions, 2190 flow [2024-06-28 04:31:16,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2190, PETRI_PLACES=152, PETRI_TRANSITIONS=214} [2024-06-28 04:31:16,924 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-28 04:31:16,924 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 214 transitions, 2190 flow [2024-06-28 04:31:16,925 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 04:31:16,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:16,925 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 04:31:16,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:31:16,925 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:31:16,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash 982463554, now seen corresponding path program 1 times [2024-06-28 04:31:16,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:16,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367831469] [2024-06-28 04:31:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:16,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:19,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:19,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367831469] [2024-06-28 04:31:19,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367831469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:19,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:19,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:31:19,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017554189] [2024-06-28 04:31:19,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:19,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:31:19,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:19,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:31:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:31:19,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 04:31:19,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 214 transitions, 2190 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:19,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:19,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 04:31:19,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:21,244 INFO L124 PetriNetUnfolderBase]: 7499/11171 cut-off events. [2024-06-28 04:31:21,244 INFO L125 PetriNetUnfolderBase]: For 340604/340622 co-relation queries the response was YES. [2024-06-28 04:31:21,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68350 conditions, 11171 events. 7499/11171 cut-off events. For 340604/340622 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 68537 event pairs, 2693 based on Foata normal form. 4/10942 useless extension candidates. Maximal degree in co-relation 68285. Up to 9989 conditions per place. [2024-06-28 04:31:21,365 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 163 selfloop transitions, 13 changer transitions 0/237 dead transitions. [2024-06-28 04:31:21,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 237 transitions, 2654 flow [2024-06-28 04:31:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:31:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:31:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-28 04:31:21,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-28 04:31:21,367 INFO L175 Difference]: Start difference. First operand has 152 places, 214 transitions, 2190 flow. Second operand 5 states and 120 transitions. [2024-06-28 04:31:21,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 237 transitions, 2654 flow [2024-06-28 04:31:21,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 237 transitions, 2596 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:21,709 INFO L231 Difference]: Finished difference. Result has 153 places, 222 transitions, 2258 flow [2024-06-28 04:31:21,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2258, PETRI_PLACES=153, PETRI_TRANSITIONS=222} [2024-06-28 04:31:21,710 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-28 04:31:21,710 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 222 transitions, 2258 flow [2024-06-28 04:31:21,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:21,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:21,711 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 04:31:21,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:31:21,711 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:31:21,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash -826771555, now seen corresponding path program 1 times [2024-06-28 04:31:21,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:21,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532022908] [2024-06-28 04:31:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:25,114 INFO 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 04:31:25,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:25,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532022908] [2024-06-28 04:31:25,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532022908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:25,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:25,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:25,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801359883] [2024-06-28 04:31:25,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:25,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:25,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:25,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:31:25,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 222 transitions, 2258 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 04:31:25,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:25,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:31:25,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:27,891 INFO L124 PetriNetUnfolderBase]: 8333/12228 cut-off events. [2024-06-28 04:31:27,891 INFO L125 PetriNetUnfolderBase]: For 356437/356437 co-relation queries the response was YES. [2024-06-28 04:31:27,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76006 conditions, 12228 events. 8333/12228 cut-off events. For 356437/356437 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 72761 event pairs, 2753 based on Foata normal form. 4/12228 useless extension candidates. Maximal degree in co-relation 75939. Up to 11354 conditions per place. [2024-06-28 04:31:28,020 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 225 selfloop transitions, 52 changer transitions 0/284 dead transitions. [2024-06-28 04:31:28,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 284 transitions, 3070 flow [2024-06-28 04:31:28,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-28 04:31:28,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-28 04:31:28,022 INFO L175 Difference]: Start difference. First operand has 153 places, 222 transitions, 2258 flow. Second operand 8 states and 205 transitions. [2024-06-28 04:31:28,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 284 transitions, 3070 flow [2024-06-28 04:31:28,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 284 transitions, 3042 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-28 04:31:28,412 INFO L231 Difference]: Finished difference. Result has 160 places, 226 transitions, 2431 flow [2024-06-28 04:31:28,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2431, PETRI_PLACES=160, PETRI_TRANSITIONS=226} [2024-06-28 04:31:28,413 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2024-06-28 04:31:28,413 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 226 transitions, 2431 flow [2024-06-28 04:31:28,413 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 04:31:28,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:28,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:28,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:31:28,414 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:31:28,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:28,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1581740285, now seen corresponding path program 2 times [2024-06-28 04:31:28,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:28,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527332527] [2024-06-28 04:31:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:28,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:32,468 INFO 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 04:31:32,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527332527] [2024-06-28 04:31:32,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527332527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:32,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:32,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:32,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349073080] [2024-06-28 04:31:32,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:32,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:32,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:32,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:32,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:32,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:31:32,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 226 transitions, 2431 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 04:31:32,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:32,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:31:32,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:35,969 INFO L124 PetriNetUnfolderBase]: 8423/12273 cut-off events. [2024-06-28 04:31:35,970 INFO L125 PetriNetUnfolderBase]: For 385659/385659 co-relation queries the response was YES. [2024-06-28 04:31:36,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79716 conditions, 12273 events. 8423/12273 cut-off events. For 385659/385659 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 72329 event pairs, 2633 based on Foata normal form. 4/12270 useless extension candidates. Maximal degree in co-relation 79646. Up to 10950 conditions per place. [2024-06-28 04:31:36,085 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 182 selfloop transitions, 109 changer transitions 0/298 dead transitions. [2024-06-28 04:31:36,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 298 transitions, 3715 flow [2024-06-28 04:31:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-28 04:31:36,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024038461538461 [2024-06-28 04:31:36,087 INFO L175 Difference]: Start difference. First operand has 160 places, 226 transitions, 2431 flow. Second operand 8 states and 209 transitions. [2024-06-28 04:31:36,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 298 transitions, 3715 flow [2024-06-28 04:31:36,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 298 transitions, 3544 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:36,620 INFO L231 Difference]: Finished difference. Result has 162 places, 238 transitions, 2759 flow [2024-06-28 04:31:36,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2759, PETRI_PLACES=162, PETRI_TRANSITIONS=238} [2024-06-28 04:31:36,620 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2024-06-28 04:31:36,621 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 238 transitions, 2759 flow [2024-06-28 04:31:36,621 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 04:31:36,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:36,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:36,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:31:36,621 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:31:36,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash -711211615, now seen corresponding path program 3 times [2024-06-28 04:31:36,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:36,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409667092] [2024-06-28 04:31:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:36,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:40,297 INFO 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 04:31:40,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:40,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409667092] [2024-06-28 04:31:40,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409667092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:40,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:40,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:40,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447830001] [2024-06-28 04:31:40,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:40,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:40,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:40,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:40,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:40,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:31:40,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 238 transitions, 2759 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 04:31:40,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:40,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:31:40,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:43,659 INFO L124 PetriNetUnfolderBase]: 8461/12335 cut-off events. [2024-06-28 04:31:43,659 INFO L125 PetriNetUnfolderBase]: For 416872/416872 co-relation queries the response was YES. [2024-06-28 04:31:43,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82755 conditions, 12335 events. 8461/12335 cut-off events. For 416872/416872 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 72721 event pairs, 2633 based on Foata normal form. 4/12332 useless extension candidates. Maximal degree in co-relation 82684. Up to 10984 conditions per place. [2024-06-28 04:31:43,771 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 179 selfloop transitions, 112 changer transitions 0/298 dead transitions. [2024-06-28 04:31:43,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 298 transitions, 3871 flow [2024-06-28 04:31:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-28 04:31:43,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-28 04:31:43,773 INFO L175 Difference]: Start difference. First operand has 162 places, 238 transitions, 2759 flow. Second operand 8 states and 205 transitions. [2024-06-28 04:31:43,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 298 transitions, 3871 flow [2024-06-28 04:31:44,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 298 transitions, 3675 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:44,322 INFO L231 Difference]: Finished difference. Result has 167 places, 242 transitions, 2892 flow [2024-06-28 04:31:44,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2892, PETRI_PLACES=167, PETRI_TRANSITIONS=242} [2024-06-28 04:31:44,323 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-28 04:31:44,323 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 242 transitions, 2892 flow [2024-06-28 04:31:44,323 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 04:31:44,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:44,323 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 04:31:44,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:31:44,324 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:31:44,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:44,324 INFO L85 PathProgramCache]: Analyzing trace with hash -563602015, now seen corresponding path program 4 times [2024-06-28 04:31:44,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:44,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012219983] [2024-06-28 04:31:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:44,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:48,059 INFO 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 04:31:48,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:48,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012219983] [2024-06-28 04:31:48,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012219983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:48,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:48,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31715110] [2024-06-28 04:31:48,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:48,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:48,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:48,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:31:48,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 242 transitions, 2892 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 04:31:48,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:48,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:31:48,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:50,929 INFO L124 PetriNetUnfolderBase]: 8499/12400 cut-off events. [2024-06-28 04:31:50,929 INFO L125 PetriNetUnfolderBase]: For 434053/434053 co-relation queries the response was YES. [2024-06-28 04:31:50,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83978 conditions, 12400 events. 8499/12400 cut-off events. For 434053/434053 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 73090 event pairs, 2665 based on Foata normal form. 4/12400 useless extension candidates. Maximal degree in co-relation 83905. Up to 11585 conditions per place. [2024-06-28 04:31:51,051 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 239 selfloop transitions, 48 changer transitions 0/294 dead transitions. [2024-06-28 04:31:51,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 294 transitions, 3701 flow [2024-06-28 04:31:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 04:31:51,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-28 04:31:51,057 INFO L175 Difference]: Start difference. First operand has 167 places, 242 transitions, 2892 flow. Second operand 8 states and 194 transitions. [2024-06-28 04:31:51,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 294 transitions, 3701 flow [2024-06-28 04:31:51,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 294 transitions, 3509 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-28 04:31:51,469 INFO L231 Difference]: Finished difference. Result has 171 places, 246 transitions, 2895 flow [2024-06-28 04:31:51,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2895, PETRI_PLACES=171, PETRI_TRANSITIONS=246} [2024-06-28 04:31:51,469 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2024-06-28 04:31:51,470 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 246 transitions, 2895 flow [2024-06-28 04:31:51,470 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 04:31:51,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:51,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:51,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:31:51,470 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:31:51,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:51,471 INFO L85 PathProgramCache]: Analyzing trace with hash -563386348, now seen corresponding path program 1 times [2024-06-28 04:31:51,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:51,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211970320] [2024-06-28 04:31:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:51,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:55,196 INFO 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 04:31:55,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:55,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211970320] [2024-06-28 04:31:55,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211970320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:55,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:55,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:55,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889315657] [2024-06-28 04:31:55,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:55,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:55,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:55,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:55,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-28 04:31:55,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 246 transitions, 2895 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 04:31:55,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:55,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-28 04:31:55,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:58,296 INFO L124 PetriNetUnfolderBase]: 8288/12253 cut-off events. [2024-06-28 04:31:58,297 INFO L125 PetriNetUnfolderBase]: For 464958/464966 co-relation queries the response was YES. [2024-06-28 04:31:58,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83049 conditions, 12253 events. 8288/12253 cut-off events. For 464958/464966 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 74204 event pairs, 2677 based on Foata normal form. 14/12189 useless extension candidates. Maximal degree in co-relation 82975. Up to 10997 conditions per place. [2024-06-28 04:31:58,416 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 228 selfloop transitions, 46 changer transitions 0/304 dead transitions. [2024-06-28 04:31:58,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 304 transitions, 3769 flow [2024-06-28 04:31:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-28 04:31:58,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-28 04:31:58,418 INFO L175 Difference]: Start difference. First operand has 171 places, 246 transitions, 2895 flow. Second operand 8 states and 197 transitions. [2024-06-28 04:31:58,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 304 transitions, 3769 flow [2024-06-28 04:31:59,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 304 transitions, 3610 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:59,023 INFO L231 Difference]: Finished difference. Result has 174 places, 256 transitions, 3018 flow [2024-06-28 04:31:59,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2746, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3018, PETRI_PLACES=174, PETRI_TRANSITIONS=256} [2024-06-28 04:31:59,023 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 119 predicate places. [2024-06-28 04:31:59,024 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 256 transitions, 3018 flow [2024-06-28 04:31:59,024 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 04:31:59,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:59,024 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 04:31:59,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:31:59,024 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:31:59,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:59,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2008185791, now seen corresponding path program 5 times [2024-06-28 04:31:59,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:59,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065358558] [2024-06-28 04:31:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:59,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:02,404 INFO 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 04:32:02,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:02,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065358558] [2024-06-28 04:32:02,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065358558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:02,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:02,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:02,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898074564] [2024-06-28 04:32:02,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:02,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:02,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:02,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:02,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:32:02,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 256 transitions, 3018 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 04:32:02,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:02,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:32:02,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:05,925 INFO L124 PetriNetUnfolderBase]: 8769/12837 cut-off events. [2024-06-28 04:32:05,925 INFO L125 PetriNetUnfolderBase]: For 485251/485258 co-relation queries the response was YES. [2024-06-28 04:32:06,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88178 conditions, 12837 events. 8769/12837 cut-off events. For 485251/485258 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 76536 event pairs, 2746 based on Foata normal form. 4/12830 useless extension candidates. Maximal degree in co-relation 88102. Up to 11380 conditions per place. [2024-06-28 04:32:06,117 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 185 selfloop transitions, 125 changer transitions 0/317 dead transitions. [2024-06-28 04:32:06,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 317 transitions, 4206 flow [2024-06-28 04:32:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:06,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-28 04:32:06,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-28 04:32:06,125 INFO L175 Difference]: Start difference. First operand has 174 places, 256 transitions, 3018 flow. Second operand 8 states and 205 transitions. [2024-06-28 04:32:06,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 317 transitions, 4206 flow [2024-06-28 04:32:07,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 317 transitions, 4117 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 04:32:07,031 INFO L231 Difference]: Finished difference. Result has 178 places, 260 transitions, 3280 flow [2024-06-28 04:32:07,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3280, PETRI_PLACES=178, PETRI_TRANSITIONS=260} [2024-06-28 04:32:07,032 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-28 04:32:07,032 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 260 transitions, 3280 flow [2024-06-28 04:32:07,033 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 04:32:07,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:07,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:07,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:32:07,034 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:32:07,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:07,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2008454561, now seen corresponding path program 6 times [2024-06-28 04:32:07,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:07,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021371653] [2024-06-28 04:32:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:07,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:11,307 INFO 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 04:32:11,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:11,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021371653] [2024-06-28 04:32:11,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021371653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:11,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:11,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:11,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435628880] [2024-06-28 04:32:11,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:11,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:11,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:11,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:11,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:11,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:32:11,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 260 transitions, 3280 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 04:32:11,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:11,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:32:11,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:14,843 INFO L124 PetriNetUnfolderBase]: 8807/12899 cut-off events. [2024-06-28 04:32:14,843 INFO L125 PetriNetUnfolderBase]: For 506343/506350 co-relation queries the response was YES. [2024-06-28 04:32:14,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89487 conditions, 12899 events. 8807/12899 cut-off events. For 506343/506350 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 76968 event pairs, 2740 based on Foata normal form. 4/12892 useless extension candidates. Maximal degree in co-relation 89410. Up to 11414 conditions per place. [2024-06-28 04:32:14,960 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 184 selfloop transitions, 127 changer transitions 0/318 dead transitions. [2024-06-28 04:32:14,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 318 transitions, 4478 flow [2024-06-28 04:32:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 04:32:14,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-28 04:32:14,979 INFO L175 Difference]: Start difference. First operand has 178 places, 260 transitions, 3280 flow. Second operand 8 states and 202 transitions. [2024-06-28 04:32:14,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 318 transitions, 4478 flow [2024-06-28 04:32:15,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 318 transitions, 4022 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-28 04:32:15,576 INFO L231 Difference]: Finished difference. Result has 179 places, 264 transitions, 3187 flow [2024-06-28 04:32:15,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2850, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3187, PETRI_PLACES=179, PETRI_TRANSITIONS=264} [2024-06-28 04:32:15,578 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2024-06-28 04:32:15,578 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 264 transitions, 3187 flow [2024-06-28 04:32:15,578 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 04:32:15,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:15,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:15,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:32:15,578 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:32:15,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:15,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1478503215, now seen corresponding path program 7 times [2024-06-28 04:32:15,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:15,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571704858] [2024-06-28 04:32:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:15,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:19,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:19,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571704858] [2024-06-28 04:32:19,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571704858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:19,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:19,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:19,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80378034] [2024-06-28 04:32:19,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:19,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:19,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:19,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:32:19,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 264 transitions, 3187 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 04:32:19,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:19,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:32:19,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:22,291 INFO L124 PetriNetUnfolderBase]: 8845/12961 cut-off events. [2024-06-28 04:32:22,291 INFO L125 PetriNetUnfolderBase]: For 521066/521073 co-relation queries the response was YES. [2024-06-28 04:32:22,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89976 conditions, 12961 events. 8845/12961 cut-off events. For 521066/521073 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 77504 event pairs, 2746 based on Foata normal form. 4/12954 useless extension candidates. Maximal degree in co-relation 89898. Up to 11448 conditions per place. [2024-06-28 04:32:22,426 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 172 selfloop transitions, 135 changer transitions 0/314 dead transitions. [2024-06-28 04:32:22,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 314 transitions, 4187 flow [2024-06-28 04:32:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:22,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-28 04:32:22,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-28 04:32:22,443 INFO L175 Difference]: Start difference. First operand has 179 places, 264 transitions, 3187 flow. Second operand 8 states and 195 transitions. [2024-06-28 04:32:22,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 314 transitions, 4187 flow [2024-06-28 04:32:23,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 314 transitions, 3879 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:23,275 INFO L231 Difference]: Finished difference. Result has 181 places, 268 transitions, 3240 flow [2024-06-28 04:32:23,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3240, PETRI_PLACES=181, PETRI_TRANSITIONS=268} [2024-06-28 04:32:23,276 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 126 predicate places. [2024-06-28 04:32:23,276 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 268 transitions, 3240 flow [2024-06-28 04:32:23,276 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 04:32:23,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:23,276 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 04:32:23,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:32:23,276 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:32:23,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:23,277 INFO L85 PathProgramCache]: Analyzing trace with hash 254193695, now seen corresponding path program 8 times [2024-06-28 04:32:23,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:23,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69829557] [2024-06-28 04:32:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:23,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:27,025 INFO 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 04:32:27,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:27,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69829557] [2024-06-28 04:32:27,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69829557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:27,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:27,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:27,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085773888] [2024-06-28 04:32:27,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:27,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:27,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:27,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:27,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:27,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:32:27,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 268 transitions, 3240 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 04:32:27,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:27,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:32:27,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:30,553 INFO L124 PetriNetUnfolderBase]: 8831/12980 cut-off events. [2024-06-28 04:32:30,553 INFO L125 PetriNetUnfolderBase]: For 536937/536937 co-relation queries the response was YES. [2024-06-28 04:32:30,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90116 conditions, 12980 events. 8831/12980 cut-off events. For 536937/536937 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78031 event pairs, 2750 based on Foata normal form. 4/12980 useless extension candidates. Maximal degree in co-relation 90037. Up to 11698 conditions per place. [2024-06-28 04:32:30,741 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 227 selfloop transitions, 107 changer transitions 0/341 dead transitions. [2024-06-28 04:32:30,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 341 transitions, 4302 flow [2024-06-28 04:32:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:32:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:32:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-28 04:32:30,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2024-06-28 04:32:30,744 INFO L175 Difference]: Start difference. First operand has 181 places, 268 transitions, 3240 flow. Second operand 9 states and 237 transitions. [2024-06-28 04:32:30,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 341 transitions, 4302 flow [2024-06-28 04:32:32,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 341 transitions, 4001 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:32,021 INFO L231 Difference]: Finished difference. Result has 185 places, 268 transitions, 3174 flow [2024-06-28 04:32:32,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2939, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3174, PETRI_PLACES=185, PETRI_TRANSITIONS=268} [2024-06-28 04:32:32,022 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-28 04:32:32,022 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 268 transitions, 3174 flow [2024-06-28 04:32:32,022 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 04:32:32,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:32,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:32,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:32:32,022 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:32:32,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:32,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1157217473, now seen corresponding path program 9 times [2024-06-28 04:32:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:32,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361212808] [2024-06-28 04:32:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:32,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:35,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:35,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361212808] [2024-06-28 04:32:35,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361212808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:35,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:35,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:35,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238714368] [2024-06-28 04:32:35,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:35,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:35,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:35,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:35,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:35,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:32:35,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 268 transitions, 3174 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 04:32:35,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:35,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:32:35,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:38,202 INFO L124 PetriNetUnfolderBase]: 8817/12943 cut-off events. [2024-06-28 04:32:38,202 INFO L125 PetriNetUnfolderBase]: For 554070/554077 co-relation queries the response was YES. [2024-06-28 04:32:38,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89968 conditions, 12943 events. 8817/12943 cut-off events. For 554070/554077 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 77651 event pairs, 2806 based on Foata normal form. 4/12936 useless extension candidates. Maximal degree in co-relation 89888. Up to 11686 conditions per place. [2024-06-28 04:32:38,353 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 206 selfloop transitions, 102 changer transitions 0/315 dead transitions. [2024-06-28 04:32:38,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 315 transitions, 3950 flow [2024-06-28 04:32:38,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 04:32:38,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-28 04:32:38,355 INFO L175 Difference]: Start difference. First operand has 185 places, 268 transitions, 3174 flow. Second operand 7 states and 180 transitions. [2024-06-28 04:32:38,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 315 transitions, 3950 flow [2024-06-28 04:32:39,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 315 transitions, 3534 flow, removed 30 selfloop flow, removed 11 redundant places. [2024-06-28 04:32:39,192 INFO L231 Difference]: Finished difference. Result has 181 places, 268 transitions, 2977 flow [2024-06-28 04:32:39,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2977, PETRI_PLACES=181, PETRI_TRANSITIONS=268} [2024-06-28 04:32:39,193 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 126 predicate places. [2024-06-28 04:32:39,193 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 268 transitions, 2977 flow [2024-06-28 04:32:39,194 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 04:32:39,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:39,194 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 04:32:39,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:32:39,195 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:32:39,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:39,195 INFO L85 PathProgramCache]: Analyzing trace with hash 265134122, now seen corresponding path program 2 times [2024-06-28 04:32:39,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:39,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441286597] [2024-06-28 04:32:39,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:39,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:42,833 INFO 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 04:32:42,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:42,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441286597] [2024-06-28 04:32:42,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441286597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:42,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:42,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:42,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119804591] [2024-06-28 04:32:42,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:42,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:42,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:42,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:42,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:42,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-28 04:32:42,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 268 transitions, 2977 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 04:32:42,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:42,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-28 04:32:42,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:45,873 INFO L124 PetriNetUnfolderBase]: 8422/12513 cut-off events. [2024-06-28 04:32:45,874 INFO L125 PetriNetUnfolderBase]: For 540572/540572 co-relation queries the response was YES. [2024-06-28 04:32:45,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86987 conditions, 12513 events. 8422/12513 cut-off events. For 540572/540572 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 76391 event pairs, 2207 based on Foata normal form. 14/12429 useless extension candidates. Maximal degree in co-relation 86907. Up to 10793 conditions per place. [2024-06-28 04:32:46,004 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 235 selfloop transitions, 48 changer transitions 0/313 dead transitions. [2024-06-28 04:32:46,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 313 transitions, 3767 flow [2024-06-28 04:32:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:32:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:32:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-28 04:32:46,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2024-06-28 04:32:46,006 INFO L175 Difference]: Start difference. First operand has 181 places, 268 transitions, 2977 flow. Second operand 6 states and 161 transitions. [2024-06-28 04:32:46,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 313 transitions, 3767 flow [2024-06-28 04:32:46,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 313 transitions, 3524 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 04:32:46,682 INFO L231 Difference]: Finished difference. Result has 179 places, 270 transitions, 2922 flow [2024-06-28 04:32:46,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2922, PETRI_PLACES=179, PETRI_TRANSITIONS=270} [2024-06-28 04:32:46,683 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2024-06-28 04:32:46,683 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 270 transitions, 2922 flow [2024-06-28 04:32:46,683 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 04:32:46,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:46,683 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 04:32:46,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:32:46,683 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:32:46,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:46,684 INFO L85 PathProgramCache]: Analyzing trace with hash -949902896, now seen corresponding path program 3 times [2024-06-28 04:32:46,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:46,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540742696] [2024-06-28 04:32:46,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:46,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:50,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:50,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540742696] [2024-06-28 04:32:50,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540742696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:50,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:50,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:50,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985991893] [2024-06-28 04:32:50,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:50,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:50,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:50,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:50,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-28 04:32:50,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 270 transitions, 2922 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 04:32:50,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:50,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-28 04:32:50,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:53,717 INFO L124 PetriNetUnfolderBase]: 8373/12448 cut-off events. [2024-06-28 04:32:53,718 INFO L125 PetriNetUnfolderBase]: For 532696/532712 co-relation queries the response was YES. [2024-06-28 04:32:53,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86450 conditions, 12448 events. 8373/12448 cut-off events. For 532696/532712 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 76038 event pairs, 2156 based on Foata normal form. 16/12351 useless extension candidates. Maximal degree in co-relation 86370. Up to 10631 conditions per place. [2024-06-28 04:32:53,840 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 230 selfloop transitions, 50 changer transitions 0/310 dead transitions. [2024-06-28 04:32:53,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 310 transitions, 3702 flow [2024-06-28 04:32:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:32:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:32:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-28 04:32:53,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-28 04:32:53,842 INFO L175 Difference]: Start difference. First operand has 179 places, 270 transitions, 2922 flow. Second operand 6 states and 154 transitions. [2024-06-28 04:32:53,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 310 transitions, 3702 flow [2024-06-28 04:32:54,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 310 transitions, 3588 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 04:32:54,414 INFO L231 Difference]: Finished difference. Result has 181 places, 272 transitions, 2989 flow [2024-06-28 04:32:54,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2812, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2989, PETRI_PLACES=181, PETRI_TRANSITIONS=272} [2024-06-28 04:32:54,414 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 126 predicate places. [2024-06-28 04:32:54,414 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 272 transitions, 2989 flow [2024-06-28 04:32:54,415 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 04:32:54,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:54,415 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 04:32:54,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:32:54,415 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:32:54,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash -949896944, now seen corresponding path program 1 times [2024-06-28 04:32:54,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:54,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585090563] [2024-06-28 04:32:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:57,785 INFO 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 04:32:57,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:57,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585090563] [2024-06-28 04:32:57,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585090563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:57,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:57,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:57,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480950040] [2024-06-28 04:32:57,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:57,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:57,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:57,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:57,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:57,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:32:57,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 272 transitions, 2989 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 04:32:57,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:57,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:32:57,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:00,870 INFO L124 PetriNetUnfolderBase]: 8857/13008 cut-off events. [2024-06-28 04:33:00,870 INFO L125 PetriNetUnfolderBase]: For 522048/522048 co-relation queries the response was YES. [2024-06-28 04:33:00,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88886 conditions, 13008 events. 8857/13008 cut-off events. For 522048/522048 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 77959 event pairs, 2598 based on Foata normal form. 12/13015 useless extension candidates. Maximal degree in co-relation 88805. Up to 12029 conditions per place. [2024-06-28 04:33:00,989 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 282 selfloop transitions, 30 changer transitions 0/319 dead transitions. [2024-06-28 04:33:00,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 319 transitions, 3861 flow [2024-06-28 04:33:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:33:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:33:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 04:33:00,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-28 04:33:00,991 INFO L175 Difference]: Start difference. First operand has 181 places, 272 transitions, 2989 flow. Second operand 7 states and 174 transitions. [2024-06-28 04:33:00,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 319 transitions, 3861 flow [2024-06-28 04:33:01,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 319 transitions, 3724 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 04:33:01,653 INFO L231 Difference]: Finished difference. Result has 184 places, 274 transitions, 2991 flow [2024-06-28 04:33:01,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2991, PETRI_PLACES=184, PETRI_TRANSITIONS=274} [2024-06-28 04:33:01,653 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 129 predicate places. [2024-06-28 04:33:01,654 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 274 transitions, 2991 flow [2024-06-28 04:33:01,654 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 04:33:01,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:01,654 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 04:33:01,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:33:01,654 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:33:01,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:01,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1794791522, now seen corresponding path program 1 times [2024-06-28 04:33:01,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:01,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932037405] [2024-06-28 04:33:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:01,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:05,411 INFO 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 04:33:05,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:05,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932037405] [2024-06-28 04:33:05,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932037405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:05,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:05,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:05,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356933025] [2024-06-28 04:33:05,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:05,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:05,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:05,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:05,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:05,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:33:05,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 274 transitions, 2991 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 04:33:05,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:05,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:33:05,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:09,124 INFO L124 PetriNetUnfolderBase]: 9375/13761 cut-off events. [2024-06-28 04:33:09,125 INFO L125 PetriNetUnfolderBase]: For 577338/577340 co-relation queries the response was YES. [2024-06-28 04:33:09,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94614 conditions, 13761 events. 9375/13761 cut-off events. For 577338/577340 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 83157 event pairs, 2753 based on Foata normal form. 16/13765 useless extension candidates. Maximal degree in co-relation 94532. Up to 12150 conditions per place. [2024-06-28 04:33:09,258 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 258 selfloop transitions, 103 changer transitions 0/368 dead transitions. [2024-06-28 04:33:09,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 368 transitions, 4565 flow [2024-06-28 04:33:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:09,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-28 04:33:09,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700854700854701 [2024-06-28 04:33:09,260 INFO L175 Difference]: Start difference. First operand has 184 places, 274 transitions, 2991 flow. Second operand 9 states and 220 transitions. [2024-06-28 04:33:09,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 368 transitions, 4565 flow [2024-06-28 04:33:09,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 368 transitions, 4462 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 04:33:09,900 INFO L231 Difference]: Finished difference. Result has 192 places, 304 transitions, 3641 flow [2024-06-28 04:33:09,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3641, PETRI_PLACES=192, PETRI_TRANSITIONS=304} [2024-06-28 04:33:09,901 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 137 predicate places. [2024-06-28 04:33:09,901 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 304 transitions, 3641 flow [2024-06-28 04:33:09,901 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 04:33:09,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:09,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:09,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:33:09,901 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:33:09,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:09,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2087031244, now seen corresponding path program 2 times [2024-06-28 04:33:09,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:09,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195834641] [2024-06-28 04:33:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:09,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:13,579 INFO 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 04:33:13,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195834641] [2024-06-28 04:33:13,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195834641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:13,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:13,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:13,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994234972] [2024-06-28 04:33:13,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:13,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:13,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:13,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:13,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:33:13,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 304 transitions, 3641 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 04:33:13,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:13,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:33:13,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:16,937 INFO L124 PetriNetUnfolderBase]: 9671/14191 cut-off events. [2024-06-28 04:33:16,938 INFO L125 PetriNetUnfolderBase]: For 634879/634879 co-relation queries the response was YES. [2024-06-28 04:33:17,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99994 conditions, 14191 events. 9671/14191 cut-off events. For 634879/634879 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 85924 event pairs, 2799 based on Foata normal form. 40/14224 useless extension candidates. Maximal degree in co-relation 99907. Up to 12702 conditions per place. [2024-06-28 04:33:17,223 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 253 selfloop transitions, 103 changer transitions 0/363 dead transitions. [2024-06-28 04:33:17,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 363 transitions, 4708 flow [2024-06-28 04:33:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:33:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:33:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 04:33:17,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-28 04:33:17,225 INFO L175 Difference]: Start difference. First operand has 192 places, 304 transitions, 3641 flow. Second operand 8 states and 200 transitions. [2024-06-28 04:33:17,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 363 transitions, 4708 flow [2024-06-28 04:33:18,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 363 transitions, 4650 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-28 04:33:18,255 INFO L231 Difference]: Finished difference. Result has 199 places, 308 transitions, 3955 flow [2024-06-28 04:33:18,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3955, PETRI_PLACES=199, PETRI_TRANSITIONS=308} [2024-06-28 04:33:18,256 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-28 04:33:18,256 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 308 transitions, 3955 flow [2024-06-28 04:33:18,256 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 04:33:18,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:18,257 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 04:33:18,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:33:18,257 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:33:18,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash -291785248, now seen corresponding path program 3 times [2024-06-28 04:33:18,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:18,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121842527] [2024-06-28 04:33:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:22,362 INFO 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 04:33:22,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:22,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121842527] [2024-06-28 04:33:22,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121842527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:22,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:22,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:22,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760210113] [2024-06-28 04:33:22,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:22,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:22,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:22,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:22,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:22,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:33:22,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 308 transitions, 3955 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 04:33:22,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:22,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:33:22,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:26,030 INFO L124 PetriNetUnfolderBase]: 10415/15278 cut-off events. [2024-06-28 04:33:26,031 INFO L125 PetriNetUnfolderBase]: For 686424/686424 co-relation queries the response was YES. [2024-06-28 04:33:26,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108318 conditions, 15278 events. 10415/15278 cut-off events. For 686424/686424 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 93668 event pairs, 2979 based on Foata normal form. 40/15314 useless extension candidates. Maximal degree in co-relation 108228. Up to 13330 conditions per place. [2024-06-28 04:33:26,215 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 292 selfloop transitions, 66 changer transitions 0/365 dead transitions. [2024-06-28 04:33:26,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 365 transitions, 5054 flow [2024-06-28 04:33:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:33:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:33:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-28 04:33:26,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2024-06-28 04:33:26,217 INFO L175 Difference]: Start difference. First operand has 199 places, 308 transitions, 3955 flow. Second operand 8 states and 198 transitions. [2024-06-28 04:33:26,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 365 transitions, 5054 flow [2024-06-28 04:33:27,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 365 transitions, 4782 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:27,279 INFO L231 Difference]: Finished difference. Result has 201 places, 313 transitions, 4014 flow [2024-06-28 04:33:27,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3685, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4014, PETRI_PLACES=201, PETRI_TRANSITIONS=313} [2024-06-28 04:33:27,282 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2024-06-28 04:33:27,282 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 313 transitions, 4014 flow [2024-06-28 04:33:27,287 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 04:33:27,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:27,288 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 04:33:27,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:33:27,288 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:33:27,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1343290069, now seen corresponding path program 1 times [2024-06-28 04:33:27,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:27,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065949731] [2024-06-28 04:33:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:27,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:30,474 INFO 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 04:33:30,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065949731] [2024-06-28 04:33:30,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065949731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:30,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:30,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:33:30,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538758887] [2024-06-28 04:33:30,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:30,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:33:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:30,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:33:30,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:33:30,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-28 04:33:30,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 313 transitions, 4014 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:30,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:30,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-28 04:33:30,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:33,463 INFO L124 PetriNetUnfolderBase]: 9284/13999 cut-off events. [2024-06-28 04:33:33,463 INFO L125 PetriNetUnfolderBase]: For 686649/686805 co-relation queries the response was YES. [2024-06-28 04:33:33,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100652 conditions, 13999 events. 9284/13999 cut-off events. For 686649/686805 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 90732 event pairs, 2788 based on Foata normal form. 18/13715 useless extension candidates. Maximal degree in co-relation 100561. Up to 12178 conditions per place. [2024-06-28 04:33:33,623 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 221 selfloop transitions, 54 changer transitions 0/350 dead transitions. [2024-06-28 04:33:33,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 350 transitions, 4727 flow [2024-06-28 04:33:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:33:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:33:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-28 04:33:33,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-28 04:33:33,625 INFO L175 Difference]: Start difference. First operand has 201 places, 313 transitions, 4014 flow. Second operand 6 states and 153 transitions. [2024-06-28 04:33:33,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 350 transitions, 4727 flow [2024-06-28 04:33:34,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 350 transitions, 4527 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:34,719 INFO L231 Difference]: Finished difference. Result has 201 places, 320 transitions, 4025 flow [2024-06-28 04:33:34,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3814, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4025, PETRI_PLACES=201, PETRI_TRANSITIONS=320} [2024-06-28 04:33:34,719 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2024-06-28 04:33:34,719 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 320 transitions, 4025 flow [2024-06-28 04:33:34,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:34,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:34,720 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 04:33:34,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:33:34,720 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:33:34,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:34,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2129700320, now seen corresponding path program 4 times [2024-06-28 04:33:34,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:34,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839304531] [2024-06-28 04:33:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:34,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:38,348 INFO 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 04:33:38,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:38,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839304531] [2024-06-28 04:33:38,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839304531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:38,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:38,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:38,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156973785] [2024-06-28 04:33:38,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:38,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:38,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:38,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:38,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:38,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:33:38,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 320 transitions, 4025 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 04:33:38,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:38,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:33:38,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:42,659 INFO L124 PetriNetUnfolderBase]: 10760/15757 cut-off events. [2024-06-28 04:33:42,660 INFO L125 PetriNetUnfolderBase]: For 726592/726612 co-relation queries the response was YES. [2024-06-28 04:33:42,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115193 conditions, 15757 events. 10760/15757 cut-off events. For 726592/726612 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 97143 event pairs, 2954 based on Foata normal form. 28/15776 useless extension candidates. Maximal degree in co-relation 115101. Up to 14153 conditions per place. [2024-06-28 04:33:42,871 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 277 selfloop transitions, 102 changer transitions 0/386 dead transitions. [2024-06-28 04:33:42,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 386 transitions, 5376 flow [2024-06-28 04:33:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:33:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:33:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 04:33:42,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-28 04:33:42,873 INFO L175 Difference]: Start difference. First operand has 201 places, 320 transitions, 4025 flow. Second operand 8 states and 204 transitions. [2024-06-28 04:33:42,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 386 transitions, 5376 flow [2024-06-28 04:33:44,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 386 transitions, 5246 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 04:33:44,037 INFO L231 Difference]: Finished difference. Result has 205 places, 324 transitions, 4270 flow [2024-06-28 04:33:44,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4270, PETRI_PLACES=205, PETRI_TRANSITIONS=324} [2024-06-28 04:33:44,038 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 150 predicate places. [2024-06-28 04:33:44,038 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 324 transitions, 4270 flow [2024-06-28 04:33:44,038 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 04:33:44,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:44,038 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 04:33:44,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:33:44,039 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:33:44,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:44,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1406894610, now seen corresponding path program 5 times [2024-06-28 04:33:44,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:44,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511535640] [2024-06-28 04:33:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:44,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:48,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:48,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511535640] [2024-06-28 04:33:48,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511535640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:48,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:48,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:48,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188582069] [2024-06-28 04:33:48,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:48,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:48,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:48,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:48,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:48,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:33:48,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 324 transitions, 4270 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 04:33:48,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:48,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:33:48,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:52,367 INFO L124 PetriNetUnfolderBase]: 10908/15975 cut-off events. [2024-06-28 04:33:52,367 INFO L125 PetriNetUnfolderBase]: For 773998/774018 co-relation queries the response was YES. [2024-06-28 04:33:52,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118496 conditions, 15975 events. 10908/15975 cut-off events. For 773998/774018 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 98725 event pairs, 3000 based on Foata normal form. 32/15998 useless extension candidates. Maximal degree in co-relation 118403. Up to 14601 conditions per place. [2024-06-28 04:33:52,574 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 273 selfloop transitions, 99 changer transitions 0/379 dead transitions. [2024-06-28 04:33:52,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 379 transitions, 5319 flow [2024-06-28 04:33:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:33:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:33:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-28 04:33:52,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-28 04:33:52,576 INFO L175 Difference]: Start difference. First operand has 205 places, 324 transitions, 4270 flow. Second operand 8 states and 196 transitions. [2024-06-28 04:33:52,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 379 transitions, 5319 flow [2024-06-28 04:33:53,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 379 transitions, 5119 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-28 04:33:53,895 INFO L231 Difference]: Finished difference. Result has 209 places, 326 transitions, 4364 flow [2024-06-28 04:33:53,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4364, PETRI_PLACES=209, PETRI_TRANSITIONS=326} [2024-06-28 04:33:53,896 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 154 predicate places. [2024-06-28 04:33:53,896 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 326 transitions, 4364 flow [2024-06-28 04:33:53,896 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 04:33:53,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:53,897 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 04:33:53,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:33:53,897 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:33:53,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:53,897 INFO L85 PathProgramCache]: Analyzing trace with hash 861201888, now seen corresponding path program 6 times [2024-06-28 04:33:53,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:53,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356184312] [2024-06-28 04:33:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:53,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:57,368 INFO 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 04:33:57,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:57,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356184312] [2024-06-28 04:33:57,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356184312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:57,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:57,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:57,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117052443] [2024-06-28 04:33:57,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:57,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:57,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:57,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:33:57,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 326 transitions, 4364 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 04:33:57,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:57,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:33:57,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:01,924 INFO L124 PetriNetUnfolderBase]: 11300/16553 cut-off events. [2024-06-28 04:34:01,924 INFO L125 PetriNetUnfolderBase]: For 804927/804947 co-relation queries the response was YES. [2024-06-28 04:34:02,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123996 conditions, 16553 events. 11300/16553 cut-off events. For 804927/804947 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 102623 event pairs, 2776 based on Foata normal form. 28/16572 useless extension candidates. Maximal degree in co-relation 123901. Up to 12679 conditions per place. [2024-06-28 04:34:02,106 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 258 selfloop transitions, 134 changer transitions 0/399 dead transitions. [2024-06-28 04:34:02,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 399 transitions, 6047 flow [2024-06-28 04:34:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-28 04:34:02,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024038461538461 [2024-06-28 04:34:02,108 INFO L175 Difference]: Start difference. First operand has 209 places, 326 transitions, 4364 flow. Second operand 8 states and 209 transitions. [2024-06-28 04:34:02,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 399 transitions, 6047 flow [2024-06-28 04:34:03,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 399 transitions, 5813 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 04:34:03,643 INFO L231 Difference]: Finished difference. Result has 211 places, 332 transitions, 4655 flow [2024-06-28 04:34:03,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4130, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4655, PETRI_PLACES=211, PETRI_TRANSITIONS=332} [2024-06-28 04:34:03,644 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 156 predicate places. [2024-06-28 04:34:03,644 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 332 transitions, 4655 flow [2024-06-28 04:34:03,644 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 04:34:03,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:03,645 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 04:34:03,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:34:03,645 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:34:03,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash 861500418, now seen corresponding path program 7 times [2024-06-28 04:34:03,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:03,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605748852] [2024-06-28 04:34:03,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:03,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:06,882 INFO 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 04:34:06,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:06,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605748852] [2024-06-28 04:34:06,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605748852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:06,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:06,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:06,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706136462] [2024-06-28 04:34:06,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:06,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:06,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:06,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:34:06,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 332 transitions, 4655 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 04:34:06,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:06,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:34:06,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:11,287 INFO L124 PetriNetUnfolderBase]: 11416/16717 cut-off events. [2024-06-28 04:34:11,287 INFO L125 PetriNetUnfolderBase]: For 845082/845102 co-relation queries the response was YES. [2024-06-28 04:34:11,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127239 conditions, 16717 events. 11416/16717 cut-off events. For 845082/845102 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 103726 event pairs, 2754 based on Foata normal form. 28/16736 useless extension candidates. Maximal degree in co-relation 127143. Up to 12743 conditions per place. [2024-06-28 04:34:11,618 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 251 selfloop transitions, 138 changer transitions 0/396 dead transitions. [2024-06-28 04:34:11,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 396 transitions, 6148 flow [2024-06-28 04:34:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 04:34:11,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-28 04:34:11,619 INFO L175 Difference]: Start difference. First operand has 211 places, 332 transitions, 4655 flow. Second operand 8 states and 204 transitions. [2024-06-28 04:34:11,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 396 transitions, 6148 flow [2024-06-28 04:34:13,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 396 transitions, 5946 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-28 04:34:13,311 INFO L231 Difference]: Finished difference. Result has 216 places, 334 transitions, 4822 flow [2024-06-28 04:34:13,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4465, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4822, PETRI_PLACES=216, PETRI_TRANSITIONS=334} [2024-06-28 04:34:13,311 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 161 predicate places. [2024-06-28 04:34:13,312 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 334 transitions, 4822 flow [2024-06-28 04:34:13,312 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 04:34:13,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:13,312 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 04:34:13,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:34:13,312 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:34:13,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:13,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1403413998, now seen corresponding path program 8 times [2024-06-28 04:34:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:13,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953298326] [2024-06-28 04:34:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:13,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:16,472 INFO 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 04:34:16,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:16,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953298326] [2024-06-28 04:34:16,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953298326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:16,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:16,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:16,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601225524] [2024-06-28 04:34:16,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:16,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:16,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:16,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:16,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:34:16,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 334 transitions, 4822 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 04:34:16,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:16,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:34:16,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:21,028 INFO L124 PetriNetUnfolderBase]: 11768/17201 cut-off events. [2024-06-28 04:34:21,028 INFO L125 PetriNetUnfolderBase]: For 896227/896247 co-relation queries the response was YES. [2024-06-28 04:34:21,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133121 conditions, 17201 events. 11768/17201 cut-off events. For 896227/896247 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 107127 event pairs, 3220 based on Foata normal form. 32/17224 useless extension candidates. Maximal degree in co-relation 133023. Up to 14991 conditions per place. [2024-06-28 04:34:21,214 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 275 selfloop transitions, 110 changer transitions 0/392 dead transitions. [2024-06-28 04:34:21,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 392 transitions, 6189 flow [2024-06-28 04:34:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-28 04:34:21,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-28 04:34:21,216 INFO L175 Difference]: Start difference. First operand has 216 places, 334 transitions, 4822 flow. Second operand 8 states and 197 transitions. [2024-06-28 04:34:21,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 392 transitions, 6189 flow [2024-06-28 04:34:22,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 392 transitions, 5931 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-28 04:34:22,651 INFO L231 Difference]: Finished difference. Result has 221 places, 338 transitions, 4983 flow [2024-06-28 04:34:22,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4983, PETRI_PLACES=221, PETRI_TRANSITIONS=338} [2024-06-28 04:34:22,652 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 166 predicate places. [2024-06-28 04:34:22,652 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 338 transitions, 4983 flow [2024-06-28 04:34:22,656 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 04:34:22,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:22,656 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 04:34:22,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:34:22,656 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:34:22,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:22,657 INFO L85 PathProgramCache]: Analyzing trace with hash 554017636, now seen corresponding path program 9 times [2024-06-28 04:34:22,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:22,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237756987] [2024-06-28 04:34:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:22,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:26,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:26,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237756987] [2024-06-28 04:34:26,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237756987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:26,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:26,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:26,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706644518] [2024-06-28 04:34:26,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:26,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:26,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:26,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:26,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:26,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:34:26,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 338 transitions, 4983 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 04:34:26,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:26,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:34:26,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand