./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe014_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe014_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 01:59:56,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:59:56,977 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:59:56,981 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:59:56,982 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:59:57,005 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:59:57,006 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:59:57,007 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:59:57,007 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:59:57,010 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:59:57,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:59:57,011 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:59:57,011 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:59:57,012 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:59:57,012 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:59:57,013 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:59:57,013 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:59:57,013 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:59:57,013 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:59:57,013 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:59:57,013 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:59:57,014 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:59:57,014 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:59:57,014 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:59:57,014 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:59:57,014 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:59:57,015 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:59:57,015 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:59:57,015 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:59:57,015 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:59:57,016 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:59:57,016 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:59:57,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:59:57,016 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:59:57,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:59:57,017 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:59:57,017 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:59:57,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:59:57,017 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:59:57,017 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:59:57,017 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:59:57,018 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:59:57,018 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:59:57,018 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:59:57,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:59:57,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:59:57,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:59:57,242 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:59:57,242 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:59:57,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe014_rmo.oepc.yml/witness.yml [2024-06-28 01:59:57,473 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:59:57,474 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:59:57,474 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i [2024-06-28 01:59:58,557 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:59:58,791 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:59:58,792 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i [2024-06-28 01:59:58,806 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e182c650/7690acb9eb6f4571a3659871ce739e1d/FLAGc656abb72 [2024-06-28 01:59:58,817 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e182c650/7690acb9eb6f4571a3659871ce739e1d [2024-06-28 01:59:58,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:59:58,818 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:59:58,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:59:58,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:59:58,823 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:59:58,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:59:57" (1/2) ... [2024-06-28 01:59:58,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e2c280 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:58, skipping insertion in model container [2024-06-28 01:59:58,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:59:57" (1/2) ... [2024-06-28 01:59:58,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4365cfe3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:59:58, skipping insertion in model container [2024-06-28 01:59:58,825 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:59:58" (2/2) ... [2024-06-28 01:59:58,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e2c280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:58, skipping insertion in model container [2024-06-28 01:59:58,826 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:59:58" (2/2) ... [2024-06-28 01:59:58,826 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:59:58,934 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:59:58,935 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 01:59:58,936 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 01:59:58,936 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 01:59:58,936 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:59:58,937 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-28 01:59:58,972 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:59:59,111 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i[993,1006] [2024-06-28 01:59:59,312 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:59:59,321 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 01:59:59,349 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i[993,1006] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:59:59,460 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:59:59,505 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:59:59,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59 WrapperNode [2024-06-28 01:59:59,506 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:59:59,506 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:59:59,506 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:59:59,507 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:59:59,512 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,580 INFO L138 Inliner]: procedures = 175, calls = 79, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 206 [2024-06-28 01:59:59,581 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:59:59,581 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:59:59,581 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:59:59,581 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:59:59,597 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,603 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,624 INFO L175 MemorySlicer]: Split 39 memory accesses to 2 slices as follows [2, 37]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-28 01:59:59,630 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,630 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,645 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,647 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,649 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,650 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:59:59,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:59:59,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:59:59,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:59:59,655 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (1/1) ... [2024-06-28 01:59:59,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:59:59,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:59:59,677 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 01:59:59,717 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 01:59:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 01:59:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 01:59:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 01:59:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 01:59:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:59:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:59:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 01:59:59,748 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 01:59:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 01:59:59,748 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 01:59:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 01:59:59,749 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 01:59:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:59:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 01:59:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:59:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:59:59,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:59:59,752 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 01:59:59,893 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:59:59,895 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:00:00,254 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:00:00,254 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:00:00,531 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:00:00,531 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:00:00,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:00:00 BoogieIcfgContainer [2024-06-28 02:00:00,532 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:00:00,535 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:00:00,535 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:00:00,537 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:00:00,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:59:57" (1/4) ... [2024-06-28 02:00:00,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ba4457 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:00:00, skipping insertion in model container [2024-06-28 02:00:00,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:59:58" (2/4) ... [2024-06-28 02:00:00,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ba4457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:00:00, skipping insertion in model container [2024-06-28 02:00:00,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:59:59" (3/4) ... [2024-06-28 02:00:00,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ba4457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:00:00, skipping insertion in model container [2024-06-28 02:00:00,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:00:00" (4/4) ... [2024-06-28 02:00:00,541 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_rmo.oepc.i [2024-06-28 02:00:00,556 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:00:00,557 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 02:00:00,557 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:00:00,640 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:00:00,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-28 02:00:00,699 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-28 02:00:00,699 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:00:00,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-28 02:00:00,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-28 02:00:00,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-28 02:00:00,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:00:00,745 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;@32332656, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:00:00,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 02:00:00,750 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:00:00,750 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:00:00,750 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:00:00,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:00,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:00:00,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:00,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:00,755 INFO L85 PathProgramCache]: Analyzing trace with hash 628559119, now seen corresponding path program 1 times [2024-06-28 02:00:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:00,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982845497] [2024-06-28 02:00:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:00,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:02,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:02,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982845497] [2024-06-28 02:00:02,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982845497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:02,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:02,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:00:02,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54592986] [2024-06-28 02:00:02,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:02,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:00:02,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:02,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:00:02,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:00:02,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-28 02:00:02,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:02,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:02,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-28 02:00:02,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:03,273 INFO L124 PetriNetUnfolderBase]: 2180/3473 cut-off events. [2024-06-28 02:00:03,273 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-28 02:00:03,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 3473 events. 2180/3473 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19800 event pairs, 1317 based on Foata normal form. 0/3340 useless extension candidates. Maximal degree in co-relation 6714. Up to 3184 conditions per place. [2024-06-28 02:00:03,294 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-28 02:00:03,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 227 flow [2024-06-28 02:00:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:00:03,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:00:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-28 02:00:03,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-28 02:00:03,305 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 93 transitions. [2024-06-28 02:00:03,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 227 flow [2024-06-28 02:00:03,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 222 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:00:03,310 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-28 02:00:03,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-28 02:00:03,313 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-28 02:00:03,313 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-28 02:00:03,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:03,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:03,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:03,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:00:03,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:03,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:03,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1545027122, now seen corresponding path program 1 times [2024-06-28 02:00:03,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:03,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182718833] [2024-06-28 02:00:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:03,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:05,374 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 02:00:05,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:05,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182718833] [2024-06-28 02:00:05,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182718833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:05,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:05,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:00:05,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697783475] [2024-06-28 02:00:05,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:05,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:00:05,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:05,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:00:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:00:05,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-28 02:00:05,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:05,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:05,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-28 02:00:05,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:06,160 INFO L124 PetriNetUnfolderBase]: 2174/3323 cut-off events. [2024-06-28 02:00:06,160 INFO L125 PetriNetUnfolderBase]: For 604/614 co-relation queries the response was YES. [2024-06-28 02:00:06,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7442 conditions, 3323 events. 2174/3323 cut-off events. For 604/614 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18278 event pairs, 893 based on Foata normal form. 6/3323 useless extension candidates. Maximal degree in co-relation 7430. Up to 3142 conditions per place. [2024-06-28 02:00:06,190 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 60 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-28 02:00:06,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 355 flow [2024-06-28 02:00:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:00:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:00:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-28 02:00:06,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-06-28 02:00:06,205 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 126 transitions. [2024-06-28 02:00:06,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 355 flow [2024-06-28 02:00:06,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:00:06,207 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-28 02:00:06,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-28 02:00:06,208 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-28 02:00:06,208 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-28 02:00:06,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:06,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:06,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:06,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:00:06,209 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:06,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:06,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1263078770, now seen corresponding path program 1 times [2024-06-28 02:00:06,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:06,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997957807] [2024-06-28 02:00:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:06,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:08,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:08,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997957807] [2024-06-28 02:00:08,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997957807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:08,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:08,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:00:08,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89350416] [2024-06-28 02:00:08,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:08,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:00:08,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:08,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:00:08,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:00:08,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-28 02:00:08,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:08,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:08,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-28 02:00:08,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:09,996 INFO L124 PetriNetUnfolderBase]: 2769/4162 cut-off events. [2024-06-28 02:00:09,996 INFO L125 PetriNetUnfolderBase]: For 2308/2338 co-relation queries the response was YES. [2024-06-28 02:00:10,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10435 conditions, 4162 events. 2769/4162 cut-off events. For 2308/2338 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22509 event pairs, 709 based on Foata normal form. 15/4169 useless extension candidates. Maximal degree in co-relation 10420. Up to 3890 conditions per place. [2024-06-28 02:00:10,019 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 87 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2024-06-28 02:00:10,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 546 flow [2024-06-28 02:00:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 02:00:10,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-28 02:00:10,025 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 6 states and 180 transitions. [2024-06-28 02:00:10,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 546 flow [2024-06-28 02:00:10,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 111 transitions, 546 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 02:00:10,033 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 258 flow [2024-06-28 02:00:10,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-28 02:00:10,035 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2024-06-28 02:00:10,035 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 258 flow [2024-06-28 02:00:10,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:10,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:10,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:10,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:00:10,036 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:10,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:10,036 INFO L85 PathProgramCache]: Analyzing trace with hash 663194688, now seen corresponding path program 1 times [2024-06-28 02:00:10,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:10,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387318106] [2024-06-28 02:00:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:10,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:11,468 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 02:00:11,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:11,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387318106] [2024-06-28 02:00:11,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387318106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:11,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:11,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:00:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792724554] [2024-06-28 02:00:11,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:11,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:00:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:11,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:00:11,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:00:11,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:11,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:11,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:11,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:11,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:12,738 INFO L124 PetriNetUnfolderBase]: 3310/5149 cut-off events. [2024-06-28 02:00:12,739 INFO L125 PetriNetUnfolderBase]: For 4482/4482 co-relation queries the response was YES. [2024-06-28 02:00:12,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13605 conditions, 5149 events. 3310/5149 cut-off events. For 4482/4482 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29256 event pairs, 1324 based on Foata normal form. 2/5147 useless extension candidates. Maximal degree in co-relation 13585. Up to 4735 conditions per place. [2024-06-28 02:00:12,771 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 70 selfloop transitions, 13 changer transitions 0/90 dead transitions. [2024-06-28 02:00:12,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 542 flow [2024-06-28 02:00:12,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:00:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:00:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 02:00:12,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234042553191489 [2024-06-28 02:00:12,774 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 258 flow. Second operand 5 states and 123 transitions. [2024-06-28 02:00:12,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 542 flow [2024-06-28 02:00:12,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 509 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 02:00:12,780 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 337 flow [2024-06-28 02:00:12,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-28 02:00:12,781 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2024-06-28 02:00:12,782 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 337 flow [2024-06-28 02:00:12,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:12,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:12,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:12,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:00:12,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:12,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash -914281457, now seen corresponding path program 1 times [2024-06-28 02:00:12,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:12,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418060243] [2024-06-28 02:00:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:12,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:14,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:14,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418060243] [2024-06-28 02:00:14,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418060243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:14,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:14,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:00:14,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204708761] [2024-06-28 02:00:14,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:14,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:00:14,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:14,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:00:14,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:00:14,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:14,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:14,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:14,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:14,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:15,211 INFO L124 PetriNetUnfolderBase]: 3305/5151 cut-off events. [2024-06-28 02:00:15,211 INFO L125 PetriNetUnfolderBase]: For 6141/6144 co-relation queries the response was YES. [2024-06-28 02:00:15,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14872 conditions, 5151 events. 3305/5151 cut-off events. For 6141/6144 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29384 event pairs, 1337 based on Foata normal form. 4/5152 useless extension candidates. Maximal degree in co-relation 14849. Up to 4730 conditions per place. [2024-06-28 02:00:15,243 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 69 selfloop transitions, 13 changer transitions 0/89 dead transitions. [2024-06-28 02:00:15,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 556 flow [2024-06-28 02:00:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:00:15,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:00:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-28 02:00:15,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-28 02:00:15,247 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 337 flow. Second operand 5 states and 121 transitions. [2024-06-28 02:00:15,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 556 flow [2024-06-28 02:00:15,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 548 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 02:00:15,261 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 369 flow [2024-06-28 02:00:15,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-28 02:00:15,263 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2024-06-28 02:00:15,263 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 369 flow [2024-06-28 02:00:15,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:15,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:15,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:15,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:00:15,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:15,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:15,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1674752225, now seen corresponding path program 1 times [2024-06-28 02:00:15,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:15,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732644792] [2024-06-28 02:00:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:17,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:17,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732644792] [2024-06-28 02:00:17,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732644792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:17,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:17,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:17,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669016669] [2024-06-28 02:00:17,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:17,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:17,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:17,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:17,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:17,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 369 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:17,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:17,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:17,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:19,146 INFO L124 PetriNetUnfolderBase]: 3336/4962 cut-off events. [2024-06-28 02:00:19,147 INFO L125 PetriNetUnfolderBase]: For 7002/7002 co-relation queries the response was YES. [2024-06-28 02:00:19,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15002 conditions, 4962 events. 3336/4962 cut-off events. For 7002/7002 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26734 event pairs, 1003 based on Foata normal form. 2/4959 useless extension candidates. Maximal degree in co-relation 14976. Up to 4633 conditions per place. [2024-06-28 02:00:19,169 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 96 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-06-28 02:00:19,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 124 transitions, 802 flow [2024-06-28 02:00:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 02:00:19,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-28 02:00:19,171 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 369 flow. Second operand 6 states and 157 transitions. [2024-06-28 02:00:19,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 124 transitions, 802 flow [2024-06-28 02:00:19,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 124 transitions, 783 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 02:00:19,178 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 501 flow [2024-06-28 02:00:19,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=501, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-28 02:00:19,179 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-06-28 02:00:19,179 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 501 flow [2024-06-28 02:00:19,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:19,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:19,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:19,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:00:19,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:19,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:19,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1721808365, now seen corresponding path program 2 times [2024-06-28 02:00:19,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:19,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330507795] [2024-06-28 02:00:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:19,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:21,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:21,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330507795] [2024-06-28 02:00:21,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330507795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:21,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:21,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:21,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282502682] [2024-06-28 02:00:21,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:21,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:21,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:21,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:21,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:21,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 501 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:21,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:21,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:21,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:22,353 INFO L124 PetriNetUnfolderBase]: 3331/4946 cut-off events. [2024-06-28 02:00:22,353 INFO L125 PetriNetUnfolderBase]: For 10708/10715 co-relation queries the response was YES. [2024-06-28 02:00:22,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16660 conditions, 4946 events. 3331/4946 cut-off events. For 10708/10715 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26547 event pairs, 1017 based on Foata normal form. 8/4947 useless extension candidates. Maximal degree in co-relation 16630. Up to 4630 conditions per place. [2024-06-28 02:00:22,402 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 92 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2024-06-28 02:00:22,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 125 transitions, 911 flow [2024-06-28 02:00:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-28 02:00:22,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-06-28 02:00:22,404 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 501 flow. Second operand 6 states and 152 transitions. [2024-06-28 02:00:22,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 125 transitions, 911 flow [2024-06-28 02:00:22,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 903 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 02:00:22,419 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 641 flow [2024-06-28 02:00:22,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=641, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-28 02:00:22,420 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-06-28 02:00:22,420 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 641 flow [2024-06-28 02:00:22,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:22,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:22,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:22,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:00:22,421 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:22,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1769036280, now seen corresponding path program 1 times [2024-06-28 02:00:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059948793] [2024-06-28 02:00:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:22,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:24,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:24,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059948793] [2024-06-28 02:00:24,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059948793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:24,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:24,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:24,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329962008] [2024-06-28 02:00:24,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:24,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:24,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:24,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:24,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 641 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:24,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:24,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:24,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:26,359 INFO L124 PetriNetUnfolderBase]: 3615/5427 cut-off events. [2024-06-28 02:00:26,360 INFO L125 PetriNetUnfolderBase]: For 13781/13787 co-relation queries the response was YES. [2024-06-28 02:00:26,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19283 conditions, 5427 events. 3615/5427 cut-off events. For 13781/13787 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 30208 event pairs, 876 based on Foata normal form. 9/5434 useless extension candidates. Maximal degree in co-relation 19248. Up to 4887 conditions per place. [2024-06-28 02:00:26,424 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 143 selfloop transitions, 40 changer transitions 0/190 dead transitions. [2024-06-28 02:00:26,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 190 transitions, 1425 flow [2024-06-28 02:00:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:00:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:00:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-28 02:00:26,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-06-28 02:00:26,426 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 641 flow. Second operand 9 states and 240 transitions. [2024-06-28 02:00:26,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 190 transitions, 1425 flow [2024-06-28 02:00:26,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 190 transitions, 1415 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 02:00:26,442 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 921 flow [2024-06-28 02:00:26,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=921, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-28 02:00:26,443 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 41 predicate places. [2024-06-28 02:00:26,443 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 921 flow [2024-06-28 02:00:26,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:26,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:26,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:26,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:00:26,444 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:26,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:26,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1596755312, now seen corresponding path program 2 times [2024-06-28 02:00:26,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:26,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838786523] [2024-06-28 02:00:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:26,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:28,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:28,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838786523] [2024-06-28 02:00:28,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838786523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:28,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:28,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:28,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509185420] [2024-06-28 02:00:28,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:28,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:28,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:28,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:28,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:28,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:28,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 921 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:28,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:28,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:28,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:30,510 INFO L124 PetriNetUnfolderBase]: 3731/5608 cut-off events. [2024-06-28 02:00:30,510 INFO L125 PetriNetUnfolderBase]: For 20441/20449 co-relation queries the response was YES. [2024-06-28 02:00:30,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22446 conditions, 5608 events. 3731/5608 cut-off events. For 20441/20449 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31296 event pairs, 806 based on Foata normal form. 11/5617 useless extension candidates. Maximal degree in co-relation 22405. Up to 4947 conditions per place. [2024-06-28 02:00:30,540 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 134 selfloop transitions, 47 changer transitions 0/188 dead transitions. [2024-06-28 02:00:30,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 188 transitions, 1619 flow [2024-06-28 02:00:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:00:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:00:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-28 02:00:30,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-28 02:00:30,543 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 921 flow. Second operand 8 states and 212 transitions. [2024-06-28 02:00:30,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 188 transitions, 1619 flow [2024-06-28 02:00:30,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 188 transitions, 1584 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 02:00:30,564 INFO L231 Difference]: Finished difference. Result has 99 places, 116 transitions, 1087 flow [2024-06-28 02:00:30,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1087, PETRI_PLACES=99, PETRI_TRANSITIONS=116} [2024-06-28 02:00:30,565 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 48 predicate places. [2024-06-28 02:00:30,565 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 116 transitions, 1087 flow [2024-06-28 02:00:30,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:30,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:30,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:30,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:00:30,566 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:30,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:30,567 INFO L85 PathProgramCache]: Analyzing trace with hash 212956272, now seen corresponding path program 3 times [2024-06-28 02:00:30,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:30,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977198927] [2024-06-28 02:00:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:30,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:33,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:33,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977198927] [2024-06-28 02:00:33,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977198927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:33,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:33,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:33,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140540162] [2024-06-28 02:00:33,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:33,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:33,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:33,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:33,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:33,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:33,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 116 transitions, 1087 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:33,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:33,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:33,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:35,185 INFO L124 PetriNetUnfolderBase]: 3762/5627 cut-off events. [2024-06-28 02:00:35,185 INFO L125 PetriNetUnfolderBase]: For 27928/27930 co-relation queries the response was YES. [2024-06-28 02:00:35,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24793 conditions, 5627 events. 3762/5627 cut-off events. For 27928/27930 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30751 event pairs, 918 based on Foata normal form. 2/5623 useless extension candidates. Maximal degree in co-relation 24749. Up to 4920 conditions per place. [2024-06-28 02:00:35,221 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 136 selfloop transitions, 47 changer transitions 0/190 dead transitions. [2024-06-28 02:00:35,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 190 transitions, 1872 flow [2024-06-28 02:00:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:00:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:00:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-28 02:00:35,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5592705167173252 [2024-06-28 02:00:35,223 INFO L175 Difference]: Start difference. First operand has 99 places, 116 transitions, 1087 flow. Second operand 7 states and 184 transitions. [2024-06-28 02:00:35,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 190 transitions, 1872 flow [2024-06-28 02:00:35,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 190 transitions, 1782 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 02:00:35,257 INFO L231 Difference]: Finished difference. Result has 104 places, 136 transitions, 1398 flow [2024-06-28 02:00:35,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1398, PETRI_PLACES=104, PETRI_TRANSITIONS=136} [2024-06-28 02:00:35,259 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 53 predicate places. [2024-06-28 02:00:35,259 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 136 transitions, 1398 flow [2024-06-28 02:00:35,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:35,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:35,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:35,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:00:35,259 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:35,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:35,260 INFO L85 PathProgramCache]: Analyzing trace with hash 212956458, now seen corresponding path program 1 times [2024-06-28 02:00:35,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:35,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128694008] [2024-06-28 02:00:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:35,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:37,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:37,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128694008] [2024-06-28 02:00:37,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128694008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:37,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:37,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:37,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692130274] [2024-06-28 02:00:37,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:37,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:37,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:37,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:37,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:37,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 136 transitions, 1398 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:37,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:37,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:37,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:38,805 INFO L124 PetriNetUnfolderBase]: 3793/5685 cut-off events. [2024-06-28 02:00:38,805 INFO L125 PetriNetUnfolderBase]: For 32435/32443 co-relation queries the response was YES. [2024-06-28 02:00:38,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26514 conditions, 5685 events. 3793/5685 cut-off events. For 32435/32443 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31212 event pairs, 902 based on Foata normal form. 10/5690 useless extension candidates. Maximal degree in co-relation 26466. Up to 5232 conditions per place. [2024-06-28 02:00:38,872 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 147 selfloop transitions, 29 changer transitions 0/183 dead transitions. [2024-06-28 02:00:38,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 183 transitions, 1956 flow [2024-06-28 02:00:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 02:00:38,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-28 02:00:38,878 INFO L175 Difference]: Start difference. First operand has 104 places, 136 transitions, 1398 flow. Second operand 6 states and 157 transitions. [2024-06-28 02:00:38,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 183 transitions, 1956 flow [2024-06-28 02:00:38,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 183 transitions, 1906 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 02:00:38,936 INFO L231 Difference]: Finished difference. Result has 108 places, 139 transitions, 1449 flow [2024-06-28 02:00:38,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1449, PETRI_PLACES=108, PETRI_TRANSITIONS=139} [2024-06-28 02:00:38,937 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 57 predicate places. [2024-06-28 02:00:38,937 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 139 transitions, 1449 flow [2024-06-28 02:00:38,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:38,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:38,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:38,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:00:38,937 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:38,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:38,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1797365798, now seen corresponding path program 2 times [2024-06-28 02:00:38,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:38,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569880309] [2024-06-28 02:00:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:38,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:41,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:41,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569880309] [2024-06-28 02:00:41,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569880309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:41,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:41,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:41,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852975044] [2024-06-28 02:00:41,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:41,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:41,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:41,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:41,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:41,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:41,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 139 transitions, 1449 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:41,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:41,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:41,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:42,344 INFO L124 PetriNetUnfolderBase]: 3788/5688 cut-off events. [2024-06-28 02:00:42,344 INFO L125 PetriNetUnfolderBase]: For 33085/33126 co-relation queries the response was YES. [2024-06-28 02:00:42,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26314 conditions, 5688 events. 3788/5688 cut-off events. For 33085/33126 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31422 event pairs, 921 based on Foata normal form. 34/5715 useless extension candidates. Maximal degree in co-relation 26264. Up to 5227 conditions per place. [2024-06-28 02:00:42,384 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 145 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2024-06-28 02:00:42,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 181 transitions, 1951 flow [2024-06-28 02:00:42,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 02:00:42,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-28 02:00:42,386 INFO L175 Difference]: Start difference. First operand has 108 places, 139 transitions, 1449 flow. Second operand 6 states and 150 transitions. [2024-06-28 02:00:42,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 181 transitions, 1951 flow [2024-06-28 02:00:42,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 1910 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 02:00:42,420 INFO L231 Difference]: Finished difference. Result has 111 places, 141 transitions, 1503 flow [2024-06-28 02:00:42,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1503, PETRI_PLACES=111, PETRI_TRANSITIONS=141} [2024-06-28 02:00:42,421 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 60 predicate places. [2024-06-28 02:00:42,421 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 141 transitions, 1503 flow [2024-06-28 02:00:42,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:42,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:42,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:42,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:00:42,421 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:42,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:42,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1836452582, now seen corresponding path program 4 times [2024-06-28 02:00:42,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:42,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401395535] [2024-06-28 02:00:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:42,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:44,920 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 02:00:44,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:44,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401395535] [2024-06-28 02:00:44,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401395535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:44,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:44,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:44,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381854557] [2024-06-28 02:00:44,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:44,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:44,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:44,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:44,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:44,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:44,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 141 transitions, 1503 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:44,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:44,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:44,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:46,499 INFO L124 PetriNetUnfolderBase]: 3783/5629 cut-off events. [2024-06-28 02:00:46,499 INFO L125 PetriNetUnfolderBase]: For 34980/34988 co-relation queries the response was YES. [2024-06-28 02:00:46,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26424 conditions, 5629 events. 3783/5629 cut-off events. For 34980/34988 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30331 event pairs, 965 based on Foata normal form. 4/5615 useless extension candidates. Maximal degree in co-relation 26373. Up to 4934 conditions per place. [2024-06-28 02:00:46,533 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 133 selfloop transitions, 55 changer transitions 0/195 dead transitions. [2024-06-28 02:00:46,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 195 transitions, 2115 flow [2024-06-28 02:00:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:00:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:00:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 02:00:46,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-28 02:00:46,535 INFO L175 Difference]: Start difference. First operand has 111 places, 141 transitions, 1503 flow. Second operand 7 states and 179 transitions. [2024-06-28 02:00:46,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 195 transitions, 2115 flow [2024-06-28 02:00:46,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 195 transitions, 2072 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 02:00:46,573 INFO L231 Difference]: Finished difference. Result has 115 places, 144 transitions, 1618 flow [2024-06-28 02:00:46,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1618, PETRI_PLACES=115, PETRI_TRANSITIONS=144} [2024-06-28 02:00:46,574 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2024-06-28 02:00:46,574 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 144 transitions, 1618 flow [2024-06-28 02:00:46,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:46,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:46,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:46,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:00:46,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:46,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:46,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1843848686, now seen corresponding path program 1 times [2024-06-28 02:00:46,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:46,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823593856] [2024-06-28 02:00:46,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:46,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:48,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:48,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823593856] [2024-06-28 02:00:48,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823593856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:48,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:48,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:00:48,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043021797] [2024-06-28 02:00:48,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:48,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:00:48,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:48,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:00:48,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:00:48,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:48,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 144 transitions, 1618 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:48,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:48,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:48,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:49,556 INFO L124 PetriNetUnfolderBase]: 3775/5892 cut-off events. [2024-06-28 02:00:49,556 INFO L125 PetriNetUnfolderBase]: For 40260/40268 co-relation queries the response was YES. [2024-06-28 02:00:49,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27318 conditions, 5892 events. 3775/5892 cut-off events. For 40260/40268 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 33852 event pairs, 1132 based on Foata normal form. 8/5897 useless extension candidates. Maximal degree in co-relation 27266. Up to 5340 conditions per place. [2024-06-28 02:00:49,591 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 156 selfloop transitions, 16 changer transitions 0/179 dead transitions. [2024-06-28 02:00:49,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 179 transitions, 2078 flow [2024-06-28 02:00:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:00:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:00:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 02:00:49,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-28 02:00:49,593 INFO L175 Difference]: Start difference. First operand has 115 places, 144 transitions, 1618 flow. Second operand 6 states and 145 transitions. [2024-06-28 02:00:49,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 179 transitions, 2078 flow [2024-06-28 02:00:49,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 179 transitions, 1987 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:00:49,628 INFO L231 Difference]: Finished difference. Result has 117 places, 147 transitions, 1603 flow [2024-06-28 02:00:49,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1603, PETRI_PLACES=117, PETRI_TRANSITIONS=147} [2024-06-28 02:00:49,628 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-06-28 02:00:49,628 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 147 transitions, 1603 flow [2024-06-28 02:00:49,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:49,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:49,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:49,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:00:49,629 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:49,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:49,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1992008225, now seen corresponding path program 1 times [2024-06-28 02:00:49,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:49,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401371393] [2024-06-28 02:00:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:49,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:00:52,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:52,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401371393] [2024-06-28 02:00:52,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401371393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:52,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:52,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:00:52,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149481338] [2024-06-28 02:00:52,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:52,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:00:52,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:52,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:00:52,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:00:52,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:52,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 147 transitions, 1603 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:52,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:52,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:52,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:53,704 INFO L124 PetriNetUnfolderBase]: 3759/5644 cut-off events. [2024-06-28 02:00:53,705 INFO L125 PetriNetUnfolderBase]: For 41163/41171 co-relation queries the response was YES. [2024-06-28 02:00:53,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27098 conditions, 5644 events. 3759/5644 cut-off events. For 41163/41171 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31020 event pairs, 881 based on Foata normal form. 14/5656 useless extension candidates. Maximal degree in co-relation 27044. Up to 4991 conditions per place. [2024-06-28 02:00:53,757 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 147 selfloop transitions, 61 changer transitions 0/215 dead transitions. [2024-06-28 02:00:53,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 215 transitions, 2243 flow [2024-06-28 02:00:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:00:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:00:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-28 02:00:53,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-28 02:00:53,759 INFO L175 Difference]: Start difference. First operand has 117 places, 147 transitions, 1603 flow. Second operand 8 states and 210 transitions. [2024-06-28 02:00:53,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 215 transitions, 2243 flow [2024-06-28 02:00:53,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 215 transitions, 2177 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 02:00:53,800 INFO L231 Difference]: Finished difference. Result has 121 places, 147 transitions, 1679 flow [2024-06-28 02:00:53,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1679, PETRI_PLACES=121, PETRI_TRANSITIONS=147} [2024-06-28 02:00:53,801 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2024-06-28 02:00:53,801 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 147 transitions, 1679 flow [2024-06-28 02:00:53,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:53,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:53,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:53,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:00:53,802 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:53,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:53,802 INFO L85 PathProgramCache]: Analyzing trace with hash 656831209, now seen corresponding path program 2 times [2024-06-28 02:00:53,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:53,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257440529] [2024-06-28 02:00:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:53,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:00:57,141 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 02:00:57,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:00:57,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257440529] [2024-06-28 02:00:57,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257440529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:00:57,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:00:57,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:00:57,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132810205] [2024-06-28 02:00:57,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:00:57,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:00:57,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:00:57,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:00:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:00:57,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:00:57,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 147 transitions, 1679 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:57,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:00:57,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:00:57,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:00:59,122 INFO L124 PetriNetUnfolderBase]: 3790/5677 cut-off events. [2024-06-28 02:00:59,122 INFO L125 PetriNetUnfolderBase]: For 45254/45256 co-relation queries the response was YES. [2024-06-28 02:00:59,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27803 conditions, 5677 events. 3790/5677 cut-off events. For 45254/45256 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 31101 event pairs, 906 based on Foata normal form. 2/5673 useless extension candidates. Maximal degree in co-relation 27748. Up to 4936 conditions per place. [2024-06-28 02:00:59,160 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 151 selfloop transitions, 56 changer transitions 0/214 dead transitions. [2024-06-28 02:00:59,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 214 transitions, 2381 flow [2024-06-28 02:00:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:00:59,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:00:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-28 02:00:59,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-28 02:00:59,162 INFO L175 Difference]: Start difference. First operand has 121 places, 147 transitions, 1679 flow. Second operand 8 states and 209 transitions. [2024-06-28 02:00:59,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 214 transitions, 2381 flow [2024-06-28 02:00:59,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 214 transitions, 2243 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 02:00:59,197 INFO L231 Difference]: Finished difference. Result has 122 places, 150 transitions, 1701 flow [2024-06-28 02:00:59,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1701, PETRI_PLACES=122, PETRI_TRANSITIONS=150} [2024-06-28 02:00:59,197 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 71 predicate places. [2024-06-28 02:00:59,198 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 150 transitions, 1701 flow [2024-06-28 02:00:59,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:00:59,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:00:59,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:00:59,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:00:59,198 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:00:59,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:00:59,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1988283575, now seen corresponding path program 3 times [2024-06-28 02:00:59,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:00:59,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021046200] [2024-06-28 02:00:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:00:59,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:00:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:02,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021046200] [2024-06-28 02:01:02,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021046200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:02,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:02,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:02,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827036386] [2024-06-28 02:01:02,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:02,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:02,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:02,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:02,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:02,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:02,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 150 transitions, 1701 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:02,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:02,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:02,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:03,851 INFO L124 PetriNetUnfolderBase]: 3857/5806 cut-off events. [2024-06-28 02:01:03,851 INFO L125 PetriNetUnfolderBase]: For 45221/45223 co-relation queries the response was YES. [2024-06-28 02:01:03,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28078 conditions, 5806 events. 3857/5806 cut-off events. For 45221/45223 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 32114 event pairs, 908 based on Foata normal form. 2/5803 useless extension candidates. Maximal degree in co-relation 28022. Up to 5005 conditions per place. [2024-06-28 02:01:03,893 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 145 selfloop transitions, 59 changer transitions 0/211 dead transitions. [2024-06-28 02:01:03,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 211 transitions, 2471 flow [2024-06-28 02:01:03,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-28 02:01:03,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653495440729484 [2024-06-28 02:01:03,895 INFO L175 Difference]: Start difference. First operand has 122 places, 150 transitions, 1701 flow. Second operand 7 states and 186 transitions. [2024-06-28 02:01:03,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 211 transitions, 2471 flow [2024-06-28 02:01:03,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 211 transitions, 2333 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 02:01:03,937 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1769 flow [2024-06-28 02:01:03,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1769, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2024-06-28 02:01:03,944 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 72 predicate places. [2024-06-28 02:01:03,944 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1769 flow [2024-06-28 02:01:03,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:03,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:03,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:03,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:01:03,945 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:03,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash -123591521, now seen corresponding path program 4 times [2024-06-28 02:01:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:03,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361239852] [2024-06-28 02:01:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:07,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:07,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361239852] [2024-06-28 02:01:07,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361239852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:07,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:07,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:07,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893510201] [2024-06-28 02:01:07,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:07,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:07,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:07,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:07,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1769 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:07,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:07,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:07,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:09,031 INFO L124 PetriNetUnfolderBase]: 3852/5750 cut-off events. [2024-06-28 02:01:09,031 INFO L125 PetriNetUnfolderBase]: For 47978/47986 co-relation queries the response was YES. [2024-06-28 02:01:09,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28029 conditions, 5750 events. 3852/5750 cut-off events. For 47978/47986 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 31214 event pairs, 973 based on Foata normal form. 4/5736 useless extension candidates. Maximal degree in co-relation 27972. Up to 5000 conditions per place. [2024-06-28 02:01:09,069 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 147 selfloop transitions, 64 changer transitions 0/218 dead transitions. [2024-06-28 02:01:09,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 218 transitions, 2447 flow [2024-06-28 02:01:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:01:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:01:09,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:01:09,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-28 02:01:09,071 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1769 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:01:09,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 218 transitions, 2447 flow [2024-06-28 02:01:09,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 218 transitions, 2363 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 02:01:09,113 INFO L231 Difference]: Finished difference. Result has 128 places, 156 transitions, 1821 flow [2024-06-28 02:01:09,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1821, PETRI_PLACES=128, PETRI_TRANSITIONS=156} [2024-06-28 02:01:09,114 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 77 predicate places. [2024-06-28 02:01:09,114 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 156 transitions, 1821 flow [2024-06-28 02:01:09,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:09,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:09,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:09,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:01:09,115 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:09,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:09,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1324458469, now seen corresponding path program 5 times [2024-06-28 02:01:09,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:09,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389363182] [2024-06-28 02:01:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:09,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:11,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:11,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389363182] [2024-06-28 02:01:11,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389363182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:11,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:11,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:11,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556383375] [2024-06-28 02:01:11,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:11,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:11,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:11,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:11,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 156 transitions, 1821 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:11,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:11,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:11,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:13,083 INFO L124 PetriNetUnfolderBase]: 3847/5787 cut-off events. [2024-06-28 02:01:13,084 INFO L125 PetriNetUnfolderBase]: For 52690/52723 co-relation queries the response was YES. [2024-06-28 02:01:13,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28221 conditions, 5787 events. 3847/5787 cut-off events. For 52690/52723 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 32027 event pairs, 962 based on Foata normal form. 15/5789 useless extension candidates. Maximal degree in co-relation 28163. Up to 4995 conditions per place. [2024-06-28 02:01:13,125 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 141 selfloop transitions, 58 changer transitions 0/206 dead transitions. [2024-06-28 02:01:13,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 206 transitions, 2388 flow [2024-06-28 02:01:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:01:13,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-06-28 02:01:13,129 INFO L175 Difference]: Start difference. First operand has 128 places, 156 transitions, 1821 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:01:13,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 206 transitions, 2388 flow [2024-06-28 02:01:13,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 206 transitions, 2244 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 02:01:13,181 INFO L231 Difference]: Finished difference. Result has 129 places, 157 transitions, 1816 flow [2024-06-28 02:01:13,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1816, PETRI_PLACES=129, PETRI_TRANSITIONS=157} [2024-06-28 02:01:13,182 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 78 predicate places. [2024-06-28 02:01:13,182 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 157 transitions, 1816 flow [2024-06-28 02:01:13,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:13,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:13,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:13,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:01:13,182 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:13,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:13,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2122041323, now seen corresponding path program 1 times [2024-06-28 02:01:13,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:13,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176926473] [2024-06-28 02:01:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:13,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:16,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:16,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176926473] [2024-06-28 02:01:16,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176926473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:16,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:16,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:16,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63069164] [2024-06-28 02:01:16,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:16,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:16,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:16,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:16,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:16,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:16,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 157 transitions, 1816 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:16,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:16,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:16,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:17,901 INFO L124 PetriNetUnfolderBase]: 4432/6689 cut-off events. [2024-06-28 02:01:17,902 INFO L125 PetriNetUnfolderBase]: For 60930/60938 co-relation queries the response was YES. [2024-06-28 02:01:17,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32657 conditions, 6689 events. 4432/6689 cut-off events. For 60930/60938 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 38397 event pairs, 570 based on Foata normal form. 14/6701 useless extension candidates. Maximal degree in co-relation 32598. Up to 5083 conditions per place. [2024-06-28 02:01:17,955 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 179 selfloop transitions, 64 changer transitions 0/250 dead transitions. [2024-06-28 02:01:17,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 250 transitions, 2732 flow [2024-06-28 02:01:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:01:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:01:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-28 02:01:17,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-06-28 02:01:17,957 INFO L175 Difference]: Start difference. First operand has 129 places, 157 transitions, 1816 flow. Second operand 9 states and 243 transitions. [2024-06-28 02:01:17,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 250 transitions, 2732 flow [2024-06-28 02:01:18,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 250 transitions, 2640 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 02:01:18,037 INFO L231 Difference]: Finished difference. Result has 135 places, 164 transitions, 1967 flow [2024-06-28 02:01:18,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1967, PETRI_PLACES=135, PETRI_TRANSITIONS=164} [2024-06-28 02:01:18,038 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 84 predicate places. [2024-06-28 02:01:18,038 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 164 transitions, 1967 flow [2024-06-28 02:01:18,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:18,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:18,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:18,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:01:18,038 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:18,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:18,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1625513265, now seen corresponding path program 2 times [2024-06-28 02:01:18,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:18,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910672162] [2024-06-28 02:01:18,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:18,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:20,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:20,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910672162] [2024-06-28 02:01:20,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910672162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:20,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:20,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:20,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642888600] [2024-06-28 02:01:20,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:20,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:20,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:20,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:20,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:20,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:20,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 164 transitions, 1967 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:20,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:20,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:20,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:22,655 INFO L124 PetriNetUnfolderBase]: 4419/6670 cut-off events. [2024-06-28 02:01:22,655 INFO L125 PetriNetUnfolderBase]: For 68403/68411 co-relation queries the response was YES. [2024-06-28 02:01:22,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33785 conditions, 6670 events. 4419/6670 cut-off events. For 68403/68411 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 38075 event pairs, 859 based on Foata normal form. 14/6682 useless extension candidates. Maximal degree in co-relation 33723. Up to 5869 conditions per place. [2024-06-28 02:01:22,710 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 175 selfloop transitions, 64 changer transitions 0/246 dead transitions. [2024-06-28 02:01:22,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 246 transitions, 2735 flow [2024-06-28 02:01:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:01:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:01:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-28 02:01:22,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2024-06-28 02:01:22,712 INFO L175 Difference]: Start difference. First operand has 135 places, 164 transitions, 1967 flow. Second operand 9 states and 236 transitions. [2024-06-28 02:01:22,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 246 transitions, 2735 flow [2024-06-28 02:01:22,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 246 transitions, 2633 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 02:01:22,812 INFO L231 Difference]: Finished difference. Result has 139 places, 167 transitions, 2056 flow [2024-06-28 02:01:22,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2056, PETRI_PLACES=139, PETRI_TRANSITIONS=167} [2024-06-28 02:01:22,813 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 88 predicate places. [2024-06-28 02:01:22,813 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 167 transitions, 2056 flow [2024-06-28 02:01:22,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:22,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:22,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:22,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:01:22,813 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:22,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:22,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1113072925, now seen corresponding path program 3 times [2024-06-28 02:01:22,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:22,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737800157] [2024-06-28 02:01:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:22,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:26,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:26,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737800157] [2024-06-28 02:01:26,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737800157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:26,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:26,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:26,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426053231] [2024-06-28 02:01:26,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:26,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:26,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:26,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:26,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:26,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:26,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 167 transitions, 2056 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:26,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:26,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:26,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:28,011 INFO L124 PetriNetUnfolderBase]: 4469/6722 cut-off events. [2024-06-28 02:01:28,012 INFO L125 PetriNetUnfolderBase]: For 76006/76008 co-relation queries the response was YES. [2024-06-28 02:01:28,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34916 conditions, 6722 events. 4469/6722 cut-off events. For 76006/76008 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 38075 event pairs, 886 based on Foata normal form. 4/6720 useless extension candidates. Maximal degree in co-relation 34852. Up to 5875 conditions per place. [2024-06-28 02:01:28,058 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 160 selfloop transitions, 65 changer transitions 0/232 dead transitions. [2024-06-28 02:01:28,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 232 transitions, 2730 flow [2024-06-28 02:01:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:01:28,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:01:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-28 02:01:28,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-28 02:01:28,060 INFO L175 Difference]: Start difference. First operand has 139 places, 167 transitions, 2056 flow. Second operand 8 states and 207 transitions. [2024-06-28 02:01:28,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 232 transitions, 2730 flow [2024-06-28 02:01:28,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 232 transitions, 2583 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 02:01:28,147 INFO L231 Difference]: Finished difference. Result has 140 places, 169 transitions, 2084 flow [2024-06-28 02:01:28,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2084, PETRI_PLACES=140, PETRI_TRANSITIONS=169} [2024-06-28 02:01:28,148 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 89 predicate places. [2024-06-28 02:01:28,148 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 169 transitions, 2084 flow [2024-06-28 02:01:28,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:28,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:28,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:28,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:01:28,149 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:28,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:28,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1507240887, now seen corresponding path program 1 times [2024-06-28 02:01:28,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:28,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010449529] [2024-06-28 02:01:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:28,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:30,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:30,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010449529] [2024-06-28 02:01:30,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010449529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:30,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:30,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:30,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569745013] [2024-06-28 02:01:30,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:30,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:30,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:30,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:30,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:30,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:30,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 169 transitions, 2084 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:30,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:30,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:30,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:32,512 INFO L124 PetriNetUnfolderBase]: 4519/6811 cut-off events. [2024-06-28 02:01:32,512 INFO L125 PetriNetUnfolderBase]: For 81769/81777 co-relation queries the response was YES. [2024-06-28 02:01:32,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35553 conditions, 6811 events. 4519/6811 cut-off events. For 81769/81777 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 38904 event pairs, 849 based on Foata normal form. 12/6818 useless extension candidates. Maximal degree in co-relation 35488. Up to 6262 conditions per place. [2024-06-28 02:01:32,579 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 185 selfloop transitions, 33 changer transitions 0/225 dead transitions. [2024-06-28 02:01:32,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 225 transitions, 2712 flow [2024-06-28 02:01:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 02:01:32,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-28 02:01:32,581 INFO L175 Difference]: Start difference. First operand has 140 places, 169 transitions, 2084 flow. Second operand 7 states and 180 transitions. [2024-06-28 02:01:32,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 225 transitions, 2712 flow [2024-06-28 02:01:32,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 225 transitions, 2559 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 02:01:32,722 INFO L231 Difference]: Finished difference. Result has 141 places, 171 transitions, 2032 flow [2024-06-28 02:01:32,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2032, PETRI_PLACES=141, PETRI_TRANSITIONS=171} [2024-06-28 02:01:32,723 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 90 predicate places. [2024-06-28 02:01:32,723 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 171 transitions, 2032 flow [2024-06-28 02:01:32,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:32,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:32,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:32,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:01:32,724 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:32,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash -278845981, now seen corresponding path program 4 times [2024-06-28 02:01:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:32,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990837416] [2024-06-28 02:01:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:32,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:35,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990837416] [2024-06-28 02:01:35,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990837416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:35,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:35,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568601350] [2024-06-28 02:01:35,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:35,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:35,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:35,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:35,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:35,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:35,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 171 transitions, 2032 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:35,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:35,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:35,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:37,627 INFO L124 PetriNetUnfolderBase]: 4511/6739 cut-off events. [2024-06-28 02:01:37,628 INFO L125 PetriNetUnfolderBase]: For 85651/85659 co-relation queries the response was YES. [2024-06-28 02:01:37,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35274 conditions, 6739 events. 4511/6739 cut-off events. For 85651/85659 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 37668 event pairs, 952 based on Foata normal form. 6/6725 useless extension candidates. Maximal degree in co-relation 35208. Up to 5937 conditions per place. [2024-06-28 02:01:37,678 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 160 selfloop transitions, 67 changer transitions 0/234 dead transitions. [2024-06-28 02:01:37,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 234 transitions, 2716 flow [2024-06-28 02:01:37,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:01:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:01:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:01:37,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-28 02:01:37,680 INFO L175 Difference]: Start difference. First operand has 141 places, 171 transitions, 2032 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:01:37,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 234 transitions, 2716 flow [2024-06-28 02:01:37,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 234 transitions, 2637 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 02:01:37,789 INFO L231 Difference]: Finished difference. Result has 144 places, 173 transitions, 2138 flow [2024-06-28 02:01:37,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2138, PETRI_PLACES=144, PETRI_TRANSITIONS=173} [2024-06-28 02:01:37,790 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2024-06-28 02:01:37,790 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 173 transitions, 2138 flow [2024-06-28 02:01:37,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:37,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:37,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:37,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:01:37,791 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:37,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:37,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1891452627, now seen corresponding path program 2 times [2024-06-28 02:01:37,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:37,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574213891] [2024-06-28 02:01:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:37,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:40,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:40,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574213891] [2024-06-28 02:01:40,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574213891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:40,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:40,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:40,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674592984] [2024-06-28 02:01:40,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:40,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:40,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:40,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:40,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 173 transitions, 2138 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:40,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:40,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:40,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:42,121 INFO L124 PetriNetUnfolderBase]: 4561/6887 cut-off events. [2024-06-28 02:01:42,121 INFO L125 PetriNetUnfolderBase]: For 94191/94232 co-relation queries the response was YES. [2024-06-28 02:01:42,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36512 conditions, 6887 events. 4561/6887 cut-off events. For 94191/94232 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 39535 event pairs, 886 based on Foata normal form. 36/6916 useless extension candidates. Maximal degree in co-relation 36445. Up to 6324 conditions per place. [2024-06-28 02:01:42,170 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 189 selfloop transitions, 31 changer transitions 0/227 dead transitions. [2024-06-28 02:01:42,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 227 transitions, 2776 flow [2024-06-28 02:01:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:01:42,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-28 02:01:42,171 INFO L175 Difference]: Start difference. First operand has 144 places, 173 transitions, 2138 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:01:42,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 227 transitions, 2776 flow [2024-06-28 02:01:42,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 227 transitions, 2613 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 02:01:42,302 INFO L231 Difference]: Finished difference. Result has 145 places, 175 transitions, 2078 flow [2024-06-28 02:01:42,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2078, PETRI_PLACES=145, PETRI_TRANSITIONS=175} [2024-06-28 02:01:42,302 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 94 predicate places. [2024-06-28 02:01:42,303 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 175 transitions, 2078 flow [2024-06-28 02:01:42,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:42,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:42,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:42,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:01:42,303 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:42,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:42,304 INFO L85 PathProgramCache]: Analyzing trace with hash 700282949, now seen corresponding path program 3 times [2024-06-28 02:01:42,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:42,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042696948] [2024-06-28 02:01:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:42,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:44,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:44,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042696948] [2024-06-28 02:01:44,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042696948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:44,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:44,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:01:44,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376616051] [2024-06-28 02:01:44,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:44,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:01:44,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:01:44,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:01:44,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:44,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 175 transitions, 2078 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:44,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:44,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:44,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:46,160 INFO L124 PetriNetUnfolderBase]: 4553/6875 cut-off events. [2024-06-28 02:01:46,160 INFO L125 PetriNetUnfolderBase]: For 95241/95282 co-relation queries the response was YES. [2024-06-28 02:01:46,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36187 conditions, 6875 events. 4553/6875 cut-off events. For 95241/95282 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 39459 event pairs, 782 based on Foata normal form. 36/6904 useless extension candidates. Maximal degree in co-relation 36119. Up to 6162 conditions per place. [2024-06-28 02:01:46,222 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 188 selfloop transitions, 37 changer transitions 0/232 dead transitions. [2024-06-28 02:01:46,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 232 transitions, 2768 flow [2024-06-28 02:01:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:01:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:01:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 02:01:46,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-06-28 02:01:46,224 INFO L175 Difference]: Start difference. First operand has 145 places, 175 transitions, 2078 flow. Second operand 7 states and 176 transitions. [2024-06-28 02:01:46,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 232 transitions, 2768 flow [2024-06-28 02:01:46,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 232 transitions, 2687 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 02:01:46,377 INFO L231 Difference]: Finished difference. Result has 148 places, 179 transitions, 2167 flow [2024-06-28 02:01:46,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2167, PETRI_PLACES=148, PETRI_TRANSITIONS=179} [2024-06-28 02:01:46,378 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 97 predicate places. [2024-06-28 02:01:46,378 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 179 transitions, 2167 flow [2024-06-28 02:01:46,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:46,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:46,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:46,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:01:46,379 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:46,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:46,379 INFO L85 PathProgramCache]: Analyzing trace with hash -533244863, now seen corresponding path program 1 times [2024-06-28 02:01:46,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:46,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338949130] [2024-06-28 02:01:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:46,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:47,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:47,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338949130] [2024-06-28 02:01:47,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338949130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:47,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:47,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:01:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882243749] [2024-06-28 02:01:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:47,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:01:47,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:47,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:01:47,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:01:47,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:01:47,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 179 transitions, 2167 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:47,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:47,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:01:47,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:49,311 INFO L124 PetriNetUnfolderBase]: 4256/6818 cut-off events. [2024-06-28 02:01:49,312 INFO L125 PetriNetUnfolderBase]: For 97454/97492 co-relation queries the response was YES. [2024-06-28 02:01:49,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35072 conditions, 6818 events. 4256/6818 cut-off events. For 97454/97492 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 42137 event pairs, 1191 based on Foata normal form. 38/6846 useless extension candidates. Maximal degree in co-relation 35002. Up to 6074 conditions per place. [2024-06-28 02:01:49,369 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 170 selfloop transitions, 13 changer transitions 0/202 dead transitions. [2024-06-28 02:01:49,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 202 transitions, 2615 flow [2024-06-28 02:01:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:01:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:01:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-28 02:01:49,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-28 02:01:49,371 INFO L175 Difference]: Start difference. First operand has 148 places, 179 transitions, 2167 flow. Second operand 5 states and 121 transitions. [2024-06-28 02:01:49,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 202 transitions, 2615 flow [2024-06-28 02:01:49,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 202 transitions, 2539 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-28 02:01:49,527 INFO L231 Difference]: Finished difference. Result has 150 places, 183 transitions, 2164 flow [2024-06-28 02:01:49,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2164, PETRI_PLACES=150, PETRI_TRANSITIONS=183} [2024-06-28 02:01:49,528 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 99 predicate places. [2024-06-28 02:01:49,528 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 183 transitions, 2164 flow [2024-06-28 02:01:49,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:49,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:49,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:49,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:01:49,528 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:49,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:49,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1146823392, now seen corresponding path program 1 times [2024-06-28 02:01:49,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:49,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192149143] [2024-06-28 02:01:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:49,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:52,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:52,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192149143] [2024-06-28 02:01:52,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192149143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:52,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:52,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:52,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138098103] [2024-06-28 02:01:52,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:52,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:52,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:52,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:52,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:52,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:52,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 183 transitions, 2164 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:52,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:52,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:52,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:54,289 INFO L124 PetriNetUnfolderBase]: 4771/7216 cut-off events. [2024-06-28 02:01:54,289 INFO L125 PetriNetUnfolderBase]: For 109284/109292 co-relation queries the response was YES. [2024-06-28 02:01:54,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39220 conditions, 7216 events. 4771/7216 cut-off events. For 109284/109292 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 41774 event pairs, 577 based on Foata normal form. 26/7240 useless extension candidates. Maximal degree in co-relation 39148. Up to 5365 conditions per place. [2024-06-28 02:01:54,348 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 197 selfloop transitions, 68 changer transitions 0/272 dead transitions. [2024-06-28 02:01:54,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 272 transitions, 3120 flow [2024-06-28 02:01:54,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:01:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:01:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-28 02:01:54,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768321513002365 [2024-06-28 02:01:54,351 INFO L175 Difference]: Start difference. First operand has 150 places, 183 transitions, 2164 flow. Second operand 9 states and 244 transitions. [2024-06-28 02:01:54,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 272 transitions, 3120 flow [2024-06-28 02:01:54,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 272 transitions, 3075 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 02:01:54,512 INFO L231 Difference]: Finished difference. Result has 156 places, 185 transitions, 2295 flow [2024-06-28 02:01:54,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2295, PETRI_PLACES=156, PETRI_TRANSITIONS=185} [2024-06-28 02:01:54,513 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 105 predicate places. [2024-06-28 02:01:54,513 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 185 transitions, 2295 flow [2024-06-28 02:01:54,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:54,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:54,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:54,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:01:54,513 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:54,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash 575567594, now seen corresponding path program 2 times [2024-06-28 02:01:54,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:54,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247687123] [2024-06-28 02:01:54,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:54,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:01:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:01:57,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:01:57,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247687123] [2024-06-28 02:01:57,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247687123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:01:57,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:01:57,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:01:57,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708231904] [2024-06-28 02:01:57,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:01:57,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:01:57,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:01:57,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:01:57,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:01:57,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:01:57,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 185 transitions, 2295 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:57,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:01:57,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:01:57,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:01:59,262 INFO L124 PetriNetUnfolderBase]: 4725/7146 cut-off events. [2024-06-28 02:01:59,263 INFO L125 PetriNetUnfolderBase]: For 109582/109590 co-relation queries the response was YES. [2024-06-28 02:01:59,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39239 conditions, 7146 events. 4725/7146 cut-off events. For 109582/109590 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 41225 event pairs, 869 based on Foata normal form. 32/7176 useless extension candidates. Maximal degree in co-relation 39166. Up to 6005 conditions per place. [2024-06-28 02:01:59,321 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 198 selfloop transitions, 63 changer transitions 0/268 dead transitions. [2024-06-28 02:01:59,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 268 transitions, 3112 flow [2024-06-28 02:01:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:01:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:01:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-28 02:01:59,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626477541371159 [2024-06-28 02:01:59,323 INFO L175 Difference]: Start difference. First operand has 156 places, 185 transitions, 2295 flow. Second operand 9 states and 238 transitions. [2024-06-28 02:01:59,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 268 transitions, 3112 flow [2024-06-28 02:01:59,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 268 transitions, 2990 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 02:01:59,485 INFO L231 Difference]: Finished difference. Result has 159 places, 186 transitions, 2336 flow [2024-06-28 02:01:59,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2336, PETRI_PLACES=159, PETRI_TRANSITIONS=186} [2024-06-28 02:01:59,488 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 108 predicate places. [2024-06-28 02:01:59,488 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 186 transitions, 2336 flow [2024-06-28 02:01:59,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:01:59,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:01:59,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:01:59,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:01:59,489 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:01:59,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:01:59,489 INFO L85 PathProgramCache]: Analyzing trace with hash -140011052, now seen corresponding path program 3 times [2024-06-28 02:01:59,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:01:59,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575211080] [2024-06-28 02:01:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:01:59,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:01:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:02,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:02,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575211080] [2024-06-28 02:02:02,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575211080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:02,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:02,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:02,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524189660] [2024-06-28 02:02:02,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:02,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:02,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:02,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:02,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:02,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:02,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 186 transitions, 2336 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:02,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:02,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:02,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:04,421 INFO L124 PetriNetUnfolderBase]: 4901/7424 cut-off events. [2024-06-28 02:02:04,422 INFO L125 PetriNetUnfolderBase]: For 116032/116034 co-relation queries the response was YES. [2024-06-28 02:02:04,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40736 conditions, 7424 events. 4901/7424 cut-off events. For 116032/116034 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43264 event pairs, 928 based on Foata normal form. 16/7435 useless extension candidates. Maximal degree in co-relation 40662. Up to 6351 conditions per place. [2024-06-28 02:02:04,490 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 185 selfloop transitions, 61 changer transitions 0/253 dead transitions. [2024-06-28 02:02:04,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 253 transitions, 3072 flow [2024-06-28 02:02:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-28 02:02:04,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-28 02:02:04,492 INFO L175 Difference]: Start difference. First operand has 159 places, 186 transitions, 2336 flow. Second operand 8 states and 209 transitions. [2024-06-28 02:02:04,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 253 transitions, 3072 flow [2024-06-28 02:02:04,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 253 transitions, 2950 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 02:02:04,686 INFO L231 Difference]: Finished difference. Result has 160 places, 187 transitions, 2371 flow [2024-06-28 02:02:04,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2371, PETRI_PLACES=160, PETRI_TRANSITIONS=187} [2024-06-28 02:02:04,687 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 109 predicate places. [2024-06-28 02:02:04,687 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 187 transitions, 2371 flow [2024-06-28 02:02:04,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:04,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:04,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:04,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:02:04,688 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:04,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash -145373432, now seen corresponding path program 4 times [2024-06-28 02:02:04,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:04,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273200974] [2024-06-28 02:02:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:04,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:08,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:08,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273200974] [2024-06-28 02:02:08,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273200974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:08,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:08,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:02:08,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848549868] [2024-06-28 02:02:08,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:08,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:02:08,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:02:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:02:08,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:08,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 187 transitions, 2371 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:08,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:08,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:08,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:11,025 INFO L124 PetriNetUnfolderBase]: 5077/7708 cut-off events. [2024-06-28 02:02:11,026 INFO L125 PetriNetUnfolderBase]: For 126693/126695 co-relation queries the response was YES. [2024-06-28 02:02:11,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42493 conditions, 7708 events. 5077/7708 cut-off events. For 126693/126695 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 45365 event pairs, 966 based on Foata normal form. 16/7718 useless extension candidates. Maximal degree in co-relation 42418. Up to 6623 conditions per place. [2024-06-28 02:02:11,093 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 194 selfloop transitions, 64 changer transitions 0/265 dead transitions. [2024-06-28 02:02:11,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 265 transitions, 3169 flow [2024-06-28 02:02:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:02:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:02:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-28 02:02:11,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-28 02:02:11,095 INFO L175 Difference]: Start difference. First operand has 160 places, 187 transitions, 2371 flow. Second operand 9 states and 234 transitions. [2024-06-28 02:02:11,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 265 transitions, 3169 flow [2024-06-28 02:02:11,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 265 transitions, 3036 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 02:02:11,301 INFO L231 Difference]: Finished difference. Result has 163 places, 188 transitions, 2403 flow [2024-06-28 02:02:11,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2238, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=163, PETRI_TRANSITIONS=188} [2024-06-28 02:02:11,302 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 112 predicate places. [2024-06-28 02:02:11,302 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 188 transitions, 2403 flow [2024-06-28 02:02:11,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:11,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:11,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:11,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:02:11,303 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:11,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:11,303 INFO L85 PathProgramCache]: Analyzing trace with hash 514448126, now seen corresponding path program 5 times [2024-06-28 02:02:11,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:11,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267383106] [2024-06-28 02:02:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:11,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:14,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:14,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267383106] [2024-06-28 02:02:14,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267383106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:14,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:14,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:02:14,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074746074] [2024-06-28 02:02:14,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:14,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:02:14,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:14,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:02:14,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:02:14,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:14,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 188 transitions, 2403 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:14,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:14,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:14,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:17,211 INFO L124 PetriNetUnfolderBase]: 5203/7906 cut-off events. [2024-06-28 02:02:17,212 INFO L125 PetriNetUnfolderBase]: For 131202/131204 co-relation queries the response was YES. [2024-06-28 02:02:17,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43588 conditions, 7906 events. 5203/7906 cut-off events. For 131202/131204 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 46809 event pairs, 954 based on Foata normal form. 12/7912 useless extension candidates. Maximal degree in co-relation 43512. Up to 6601 conditions per place. [2024-06-28 02:02:17,283 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 206 selfloop transitions, 67 changer transitions 0/280 dead transitions. [2024-06-28 02:02:17,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 280 transitions, 3283 flow [2024-06-28 02:02:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:02:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:02:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-28 02:02:17,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553191489361702 [2024-06-28 02:02:17,285 INFO L175 Difference]: Start difference. First operand has 163 places, 188 transitions, 2403 flow. Second operand 10 states and 261 transitions. [2024-06-28 02:02:17,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 280 transitions, 3283 flow [2024-06-28 02:02:17,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 280 transitions, 3142 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 02:02:17,503 INFO L231 Difference]: Finished difference. Result has 166 places, 189 transitions, 2434 flow [2024-06-28 02:02:17,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2434, PETRI_PLACES=166, PETRI_TRANSITIONS=189} [2024-06-28 02:02:17,505 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 115 predicate places. [2024-06-28 02:02:17,505 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 189 transitions, 2434 flow [2024-06-28 02:02:17,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:17,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:17,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:17,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:02:17,505 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:17,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash -139795850, now seen corresponding path program 1 times [2024-06-28 02:02:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:17,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271183738] [2024-06-28 02:02:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:17,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:20,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:20,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271183738] [2024-06-28 02:02:20,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271183738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:20,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:20,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:20,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772055225] [2024-06-28 02:02:20,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:20,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:20,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:20,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:20,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:20,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:20,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 189 transitions, 2434 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:20,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:20,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:20,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:22,842 INFO L124 PetriNetUnfolderBase]: 5533/8456 cut-off events. [2024-06-28 02:02:22,843 INFO L125 PetriNetUnfolderBase]: For 154051/154053 co-relation queries the response was YES. [2024-06-28 02:02:22,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47175 conditions, 8456 events. 5533/8456 cut-off events. For 154051/154053 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51146 event pairs, 1012 based on Foata normal form. 12/8463 useless extension candidates. Maximal degree in co-relation 47098. Up to 6359 conditions per place. [2024-06-28 02:02:22,912 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 189 selfloop transitions, 66 changer transitions 0/262 dead transitions. [2024-06-28 02:02:22,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 262 transitions, 3364 flow [2024-06-28 02:02:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-28 02:02:22,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664893617021277 [2024-06-28 02:02:22,914 INFO L175 Difference]: Start difference. First operand has 166 places, 189 transitions, 2434 flow. Second operand 8 states and 213 transitions. [2024-06-28 02:02:22,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 262 transitions, 3364 flow [2024-06-28 02:02:23,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 262 transitions, 3212 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-28 02:02:23,165 INFO L231 Difference]: Finished difference. Result has 166 places, 191 transitions, 2486 flow [2024-06-28 02:02:23,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2486, PETRI_PLACES=166, PETRI_TRANSITIONS=191} [2024-06-28 02:02:23,166 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 115 predicate places. [2024-06-28 02:02:23,166 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 191 transitions, 2486 flow [2024-06-28 02:02:23,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:23,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:23,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:23,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:02:23,167 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:23,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:23,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1487659838, now seen corresponding path program 6 times [2024-06-28 02:02:23,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:23,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793376611] [2024-06-28 02:02:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:23,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:26,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793376611] [2024-06-28 02:02:26,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793376611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:26,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:26,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:02:26,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898445247] [2024-06-28 02:02:26,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:26,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:02:26,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:26,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:02:26,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:02:26,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:26,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 191 transitions, 2486 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:26,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:26,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:26,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:29,079 INFO L124 PetriNetUnfolderBase]: 5505/8343 cut-off events. [2024-06-28 02:02:29,079 INFO L125 PetriNetUnfolderBase]: For 153008/153016 co-relation queries the response was YES. [2024-06-28 02:02:29,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46325 conditions, 8343 events. 5505/8343 cut-off events. For 153008/153016 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 49628 event pairs, 1103 based on Foata normal form. 18/8343 useless extension candidates. Maximal degree in co-relation 46247. Up to 7291 conditions per place. [2024-06-28 02:02:29,161 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 193 selfloop transitions, 66 changer transitions 0/266 dead transitions. [2024-06-28 02:02:29,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 266 transitions, 3260 flow [2024-06-28 02:02:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:02:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:02:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-28 02:02:29,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541371158392435 [2024-06-28 02:02:29,163 INFO L175 Difference]: Start difference. First operand has 166 places, 191 transitions, 2486 flow. Second operand 9 states and 229 transitions. [2024-06-28 02:02:29,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 266 transitions, 3260 flow [2024-06-28 02:02:29,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 266 transitions, 3154 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 02:02:29,500 INFO L231 Difference]: Finished difference. Result has 171 places, 191 transitions, 2519 flow [2024-06-28 02:02:29,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2519, PETRI_PLACES=171, PETRI_TRANSITIONS=191} [2024-06-28 02:02:29,501 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-28 02:02:29,501 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 191 transitions, 2519 flow [2024-06-28 02:02:29,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:29,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:29,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:29,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:02:29,502 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:29,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:29,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1856962446, now seen corresponding path program 7 times [2024-06-28 02:02:29,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:29,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150479777] [2024-06-28 02:02:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:29,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:32,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:32,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150479777] [2024-06-28 02:02:32,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150479777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:32,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:32,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:32,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588863431] [2024-06-28 02:02:32,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:32,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:32,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:32,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:32,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:32,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:32,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 191 transitions, 2519 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:32,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:32,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:32,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:34,987 INFO L124 PetriNetUnfolderBase]: 5681/8715 cut-off events. [2024-06-28 02:02:34,988 INFO L125 PetriNetUnfolderBase]: For 158138/158171 co-relation queries the response was YES. [2024-06-28 02:02:35,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48109 conditions, 8715 events. 5681/8715 cut-off events. For 158138/158171 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 53248 event pairs, 1152 based on Foata normal form. 29/8731 useless extension candidates. Maximal degree in co-relation 48029. Up to 7563 conditions per place. [2024-06-28 02:02:35,076 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 190 selfloop transitions, 59 changer transitions 0/256 dead transitions. [2024-06-28 02:02:35,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 256 transitions, 3271 flow [2024-06-28 02:02:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:02:35,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-28 02:02:35,078 INFO L175 Difference]: Start difference. First operand has 171 places, 191 transitions, 2519 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:02:35,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 256 transitions, 3271 flow [2024-06-28 02:02:35,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 256 transitions, 3132 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 02:02:35,358 INFO L231 Difference]: Finished difference. Result has 172 places, 192 transitions, 2541 flow [2024-06-28 02:02:35,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2541, PETRI_PLACES=172, PETRI_TRANSITIONS=192} [2024-06-28 02:02:35,359 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 121 predicate places. [2024-06-28 02:02:35,359 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 192 transitions, 2541 flow [2024-06-28 02:02:35,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:35,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:35,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:35,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:02:35,360 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:35,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:35,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1487511968, now seen corresponding path program 8 times [2024-06-28 02:02:35,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:35,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813716625] [2024-06-28 02:02:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:35,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:38,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:38,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813716625] [2024-06-28 02:02:38,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813716625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:38,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:38,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:02:38,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482137966] [2024-06-28 02:02:38,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:38,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:02:38,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:38,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:02:38,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:02:38,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:38,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 192 transitions, 2541 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:38,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:38,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:38,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:40,964 INFO L124 PetriNetUnfolderBase]: 5749/8771 cut-off events. [2024-06-28 02:02:40,964 INFO L125 PetriNetUnfolderBase]: For 160734/160742 co-relation queries the response was YES. [2024-06-28 02:02:41,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48572 conditions, 8771 events. 5749/8771 cut-off events. For 160734/160742 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 53128 event pairs, 1135 based on Foata normal form. 14/8767 useless extension candidates. Maximal degree in co-relation 48491. Up to 7455 conditions per place. [2024-06-28 02:02:41,056 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 206 selfloop transitions, 69 changer transitions 0/282 dead transitions. [2024-06-28 02:02:41,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 282 transitions, 3433 flow [2024-06-28 02:02:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:02:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:02:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-28 02:02:41,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446808510638298 [2024-06-28 02:02:41,058 INFO L175 Difference]: Start difference. First operand has 172 places, 192 transitions, 2541 flow. Second operand 10 states and 256 transitions. [2024-06-28 02:02:41,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 282 transitions, 3433 flow [2024-06-28 02:02:41,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 282 transitions, 3296 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 02:02:41,416 INFO L231 Difference]: Finished difference. Result has 176 places, 193 transitions, 2586 flow [2024-06-28 02:02:41,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2586, PETRI_PLACES=176, PETRI_TRANSITIONS=193} [2024-06-28 02:02:41,416 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 125 predicate places. [2024-06-28 02:02:41,416 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 193 transitions, 2586 flow [2024-06-28 02:02:41,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:41,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:41,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:41,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:02:41,417 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:41,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1494511526, now seen corresponding path program 2 times [2024-06-28 02:02:41,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:41,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306520017] [2024-06-28 02:02:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:41,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:44,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:44,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306520017] [2024-06-28 02:02:44,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306520017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:44,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:44,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:44,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739216333] [2024-06-28 02:02:44,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:44,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:44,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:44,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:44,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:44,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:44,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 193 transitions, 2586 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:44,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:44,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:44,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:46,484 INFO L124 PetriNetUnfolderBase]: 5875/9045 cut-off events. [2024-06-28 02:02:46,485 INFO L125 PetriNetUnfolderBase]: For 168658/168691 co-relation queries the response was YES. [2024-06-28 02:02:46,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49741 conditions, 9045 events. 5875/9045 cut-off events. For 168658/168691 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 55736 event pairs, 1174 based on Foata normal form. 25/9057 useless extension candidates. Maximal degree in co-relation 49659. Up to 7653 conditions per place. [2024-06-28 02:02:46,567 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 193 selfloop transitions, 61 changer transitions 0/261 dead transitions. [2024-06-28 02:02:46,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 261 transitions, 3364 flow [2024-06-28 02:02:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-28 02:02:46,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-28 02:02:46,572 INFO L175 Difference]: Start difference. First operand has 176 places, 193 transitions, 2586 flow. Second operand 8 states and 207 transitions. [2024-06-28 02:02:46,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 261 transitions, 3364 flow [2024-06-28 02:02:46,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 261 transitions, 3202 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 02:02:46,885 INFO L231 Difference]: Finished difference. Result has 176 places, 194 transitions, 2592 flow [2024-06-28 02:02:46,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2592, PETRI_PLACES=176, PETRI_TRANSITIONS=194} [2024-06-28 02:02:46,886 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 125 predicate places. [2024-06-28 02:02:46,886 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 194 transitions, 2592 flow [2024-06-28 02:02:46,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:46,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:46,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:46,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:02:46,887 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:46,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:46,888 INFO L85 PathProgramCache]: Analyzing trace with hash 152784358, now seen corresponding path program 3 times [2024-06-28 02:02:46,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:46,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30138711] [2024-06-28 02:02:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:46,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:49,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:49,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30138711] [2024-06-28 02:02:49,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30138711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:49,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:49,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:02:49,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533680131] [2024-06-28 02:02:49,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:49,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:02:49,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:49,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:02:49,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:02:49,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:49,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 194 transitions, 2592 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:49,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:49,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:49,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:51,200 INFO L124 PetriNetUnfolderBase]: 5855/9005 cut-off events. [2024-06-28 02:02:51,200 INFO L125 PetriNetUnfolderBase]: For 160573/160606 co-relation queries the response was YES. [2024-06-28 02:02:51,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48666 conditions, 9005 events. 5855/9005 cut-off events. For 160573/160606 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 55365 event pairs, 1001 based on Foata normal form. 25/9017 useless extension candidates. Maximal degree in co-relation 48583. Up to 6171 conditions per place. [2024-06-28 02:02:51,286 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 183 selfloop transitions, 71 changer transitions 0/261 dead transitions. [2024-06-28 02:02:51,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 261 transitions, 3262 flow [2024-06-28 02:02:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:02:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:02:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 02:02:51,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-28 02:02:51,288 INFO L175 Difference]: Start difference. First operand has 176 places, 194 transitions, 2592 flow. Second operand 8 states and 206 transitions. [2024-06-28 02:02:51,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 261 transitions, 3262 flow [2024-06-28 02:02:51,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 261 transitions, 3112 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 02:02:51,629 INFO L231 Difference]: Finished difference. Result has 177 places, 193 transitions, 2516 flow [2024-06-28 02:02:51,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2516, PETRI_PLACES=177, PETRI_TRANSITIONS=193} [2024-06-28 02:02:51,629 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 126 predicate places. [2024-06-28 02:02:51,629 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 193 transitions, 2516 flow [2024-06-28 02:02:51,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:51,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:51,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:51,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:02:51,630 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:51,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1386745695, now seen corresponding path program 1 times [2024-06-28 02:02:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:51,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006549702] [2024-06-28 02:02:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:51,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:53,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:53,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006549702] [2024-06-28 02:02:53,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006549702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:53,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:53,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:02:53,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670499554] [2024-06-28 02:02:53,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:53,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:02:53,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:53,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:02:53,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:02:53,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:53,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 193 transitions, 2516 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:53,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:53,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:53,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:54,988 INFO L124 PetriNetUnfolderBase]: 5873/9337 cut-off events. [2024-06-28 02:02:54,988 INFO L125 PetriNetUnfolderBase]: For 152454/152456 co-relation queries the response was YES. [2024-06-28 02:02:55,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49042 conditions, 9337 events. 5873/9337 cut-off events. For 152454/152456 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 60462 event pairs, 1598 based on Foata normal form. 1/9334 useless extension candidates. Maximal degree in co-relation 48958. Up to 8521 conditions per place. [2024-06-28 02:02:55,076 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 199 selfloop transitions, 28 changer transitions 0/234 dead transitions. [2024-06-28 02:02:55,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 234 transitions, 3362 flow [2024-06-28 02:02:55,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:02:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:02:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 02:02:55,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070921985815603 [2024-06-28 02:02:55,078 INFO L175 Difference]: Start difference. First operand has 177 places, 193 transitions, 2516 flow. Second operand 6 states and 143 transitions. [2024-06-28 02:02:55,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 234 transitions, 3362 flow [2024-06-28 02:02:55,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 234 transitions, 3123 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-28 02:02:55,353 INFO L231 Difference]: Finished difference. Result has 176 places, 205 transitions, 2536 flow [2024-06-28 02:02:55,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2277, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2536, PETRI_PLACES=176, PETRI_TRANSITIONS=205} [2024-06-28 02:02:55,354 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 125 predicate places. [2024-06-28 02:02:55,354 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 205 transitions, 2536 flow [2024-06-28 02:02:55,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:55,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:55,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:55,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:02:55,354 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:55,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:55,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1164954977, now seen corresponding path program 2 times [2024-06-28 02:02:55,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:55,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90016248] [2024-06-28 02:02:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:55,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:02:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:02:56,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:02:56,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90016248] [2024-06-28 02:02:56,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90016248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:02:56,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:02:56,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:02:56,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494386814] [2024-06-28 02:02:56,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:02:56,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:02:56,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:02:56,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:02:56,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:02:56,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:02:56,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 205 transitions, 2536 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:56,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:02:56,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:02:56,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:02:58,720 INFO L124 PetriNetUnfolderBase]: 5891/9375 cut-off events. [2024-06-28 02:02:58,720 INFO L125 PetriNetUnfolderBase]: For 149185/149187 co-relation queries the response was YES. [2024-06-28 02:02:58,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48117 conditions, 9375 events. 5891/9375 cut-off events. For 149185/149187 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 60758 event pairs, 1585 based on Foata normal form. 1/9374 useless extension candidates. Maximal degree in co-relation 48033. Up to 8570 conditions per place. [2024-06-28 02:02:58,796 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 209 selfloop transitions, 25 changer transitions 0/241 dead transitions. [2024-06-28 02:02:58,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 241 transitions, 3226 flow [2024-06-28 02:02:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:02:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:02:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-28 02:02:58,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-28 02:02:58,798 INFO L175 Difference]: Start difference. First operand has 176 places, 205 transitions, 2536 flow. Second operand 6 states and 146 transitions. [2024-06-28 02:02:58,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 241 transitions, 3226 flow [2024-06-28 02:02:59,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 241 transitions, 3118 flow, removed 53 selfloop flow, removed 1 redundant places. [2024-06-28 02:02:59,024 INFO L231 Difference]: Finished difference. Result has 182 places, 209 transitions, 2568 flow [2024-06-28 02:02:59,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2434, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2568, PETRI_PLACES=182, PETRI_TRANSITIONS=209} [2024-06-28 02:02:59,024 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 131 predicate places. [2024-06-28 02:02:59,025 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 209 transitions, 2568 flow [2024-06-28 02:02:59,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:02:59,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:02:59,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:02:59,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:02:59,025 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:02:59,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:02:59,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1701826014, now seen corresponding path program 1 times [2024-06-28 02:02:59,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:02:59,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887965456] [2024-06-28 02:02:59,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:02:59,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:02:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:01,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887965456] [2024-06-28 02:03:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887965456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:01,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:01,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:01,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743434609] [2024-06-28 02:03:01,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:01,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:01,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:01,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:03:01,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 209 transitions, 2568 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:01,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:01,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:03:01,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:03,658 INFO L124 PetriNetUnfolderBase]: 5792/9044 cut-off events. [2024-06-28 02:03:03,659 INFO L125 PetriNetUnfolderBase]: For 156021/156077 co-relation queries the response was YES. [2024-06-28 02:03:03,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47829 conditions, 9044 events. 5792/9044 cut-off events. For 156021/156077 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 57368 event pairs, 1126 based on Foata normal form. 52/9023 useless extension candidates. Maximal degree in co-relation 47741. Up to 8049 conditions per place. [2024-06-28 02:03:03,744 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 206 selfloop transitions, 56 changer transitions 0/281 dead transitions. [2024-06-28 02:03:03,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 281 transitions, 3568 flow [2024-06-28 02:03:03,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:03:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:03:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 02:03:03,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-28 02:03:03,745 INFO L175 Difference]: Start difference. First operand has 182 places, 209 transitions, 2568 flow. Second operand 8 states and 199 transitions. [2024-06-28 02:03:03,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 281 transitions, 3568 flow [2024-06-28 02:03:04,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 281 transitions, 3528 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 02:03:04,029 INFO L231 Difference]: Finished difference. Result has 188 places, 230 transitions, 2918 flow [2024-06-28 02:03:04,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2918, PETRI_PLACES=188, PETRI_TRANSITIONS=230} [2024-06-28 02:03:04,029 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 137 predicate places. [2024-06-28 02:03:04,030 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 230 transitions, 2918 flow [2024-06-28 02:03:04,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:04,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:04,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:04,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:03:04,030 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:04,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:04,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1754099358, now seen corresponding path program 2 times [2024-06-28 02:03:04,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:04,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059543559] [2024-06-28 02:03:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:04,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:06,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:06,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059543559] [2024-06-28 02:03:06,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059543559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:06,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:06,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:06,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966106356] [2024-06-28 02:03:06,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:06,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:06,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:06,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:06,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:06,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:03:06,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 230 transitions, 2918 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:06,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:06,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:03:06,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:08,344 INFO L124 PetriNetUnfolderBase]: 5792/9033 cut-off events. [2024-06-28 02:03:08,344 INFO L125 PetriNetUnfolderBase]: For 165548/165613 co-relation queries the response was YES. [2024-06-28 02:03:08,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49557 conditions, 9033 events. 5792/9033 cut-off events. For 165548/165613 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 57124 event pairs, 1119 based on Foata normal form. 61/9016 useless extension candidates. Maximal degree in co-relation 49466. Up to 7967 conditions per place. [2024-06-28 02:03:08,433 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 194 selfloop transitions, 65 changer transitions 0/278 dead transitions. [2024-06-28 02:03:08,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 278 transitions, 3781 flow [2024-06-28 02:03:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:03:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:03:08,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-28 02:03:08,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-28 02:03:08,435 INFO L175 Difference]: Start difference. First operand has 188 places, 230 transitions, 2918 flow. Second operand 8 states and 184 transitions. [2024-06-28 02:03:08,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 278 transitions, 3781 flow [2024-06-28 02:03:08,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 278 transitions, 3719 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-28 02:03:08,715 INFO L231 Difference]: Finished difference. Result has 196 places, 239 transitions, 3133 flow [2024-06-28 02:03:08,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3133, PETRI_PLACES=196, PETRI_TRANSITIONS=239} [2024-06-28 02:03:08,716 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 145 predicate places. [2024-06-28 02:03:08,716 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 239 transitions, 3133 flow [2024-06-28 02:03:08,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:08,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:08,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:08,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:03:08,716 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:08,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1347562974, now seen corresponding path program 3 times [2024-06-28 02:03:08,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:08,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287086175] [2024-06-28 02:03:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:08,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:11,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:11,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287086175] [2024-06-28 02:03:11,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287086175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:11,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:11,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:11,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026068881] [2024-06-28 02:03:11,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:11,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:11,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:11,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:11,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:03:11,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 239 transitions, 3133 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:11,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:11,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:03:11,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:13,173 INFO L124 PetriNetUnfolderBase]: 5772/9025 cut-off events. [2024-06-28 02:03:13,174 INFO L125 PetriNetUnfolderBase]: For 173464/173510 co-relation queries the response was YES. [2024-06-28 02:03:13,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50857 conditions, 9025 events. 5772/9025 cut-off events. For 173464/173510 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 57361 event pairs, 1146 based on Foata normal form. 41/8993 useless extension candidates. Maximal degree in co-relation 50762. Up to 8043 conditions per place. [2024-06-28 02:03:13,264 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 199 selfloop transitions, 55 changer transitions 0/273 dead transitions. [2024-06-28 02:03:13,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 273 transitions, 3741 flow [2024-06-28 02:03:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:03:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:03:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-28 02:03:13,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-28 02:03:13,266 INFO L175 Difference]: Start difference. First operand has 196 places, 239 transitions, 3133 flow. Second operand 6 states and 153 transitions. [2024-06-28 02:03:13,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 273 transitions, 3741 flow [2024-06-28 02:03:13,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 273 transitions, 3614 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-28 02:03:13,586 INFO L231 Difference]: Finished difference. Result has 199 places, 239 transitions, 3136 flow [2024-06-28 02:03:13,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3006, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3136, PETRI_PLACES=199, PETRI_TRANSITIONS=239} [2024-06-28 02:03:13,587 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 148 predicate places. [2024-06-28 02:03:13,588 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 239 transitions, 3136 flow [2024-06-28 02:03:13,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:13,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:13,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:13,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:03:13,588 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:13,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash 239514952, now seen corresponding path program 1 times [2024-06-28 02:03:13,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:13,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413957890] [2024-06-28 02:03:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:13,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:15,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:15,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413957890] [2024-06-28 02:03:15,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413957890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:15,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:15,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:03:15,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160171576] [2024-06-28 02:03:15,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:15,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:03:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:15,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:03:15,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:03:15,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:15,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 239 transitions, 3136 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:15,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:15,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:15,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:17,375 INFO L124 PetriNetUnfolderBase]: 6198/9829 cut-off events. [2024-06-28 02:03:17,376 INFO L125 PetriNetUnfolderBase]: For 180122/180129 co-relation queries the response was YES. [2024-06-28 02:03:17,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53419 conditions, 9829 events. 6198/9829 cut-off events. For 180122/180129 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 63950 event pairs, 1890 based on Foata normal form. 4/9830 useless extension candidates. Maximal degree in co-relation 53323. Up to 8951 conditions per place. [2024-06-28 02:03:17,485 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 229 selfloop transitions, 34 changer transitions 0/270 dead transitions. [2024-06-28 02:03:17,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 270 transitions, 3878 flow [2024-06-28 02:03:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:03:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:03:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-28 02:03:17,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035460992907801 [2024-06-28 02:03:17,487 INFO L175 Difference]: Start difference. First operand has 199 places, 239 transitions, 3136 flow. Second operand 6 states and 142 transitions. [2024-06-28 02:03:17,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 270 transitions, 3878 flow [2024-06-28 02:03:17,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 270 transitions, 3762 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 02:03:17,881 INFO L231 Difference]: Finished difference. Result has 200 places, 243 transitions, 3157 flow [2024-06-28 02:03:17,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3020, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3157, PETRI_PLACES=200, PETRI_TRANSITIONS=243} [2024-06-28 02:03:17,881 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 149 predicate places. [2024-06-28 02:03:17,881 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 243 transitions, 3157 flow [2024-06-28 02:03:17,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:17,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:17,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:17,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:03:17,882 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:17,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:17,882 INFO L85 PathProgramCache]: Analyzing trace with hash -22806434, now seen corresponding path program 1 times [2024-06-28 02:03:17,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:17,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025666365] [2024-06-28 02:03:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:17,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:19,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025666365] [2024-06-28 02:03:19,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025666365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:19,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:19,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:19,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245086980] [2024-06-28 02:03:19,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:19,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:19,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:19,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:19,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:19,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 243 transitions, 3157 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:19,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:19,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:19,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:21,965 INFO L124 PetriNetUnfolderBase]: 6234/9817 cut-off events. [2024-06-28 02:03:21,965 INFO L125 PetriNetUnfolderBase]: For 185331/185335 co-relation queries the response was YES. [2024-06-28 02:03:22,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53530 conditions, 9817 events. 6234/9817 cut-off events. For 185331/185335 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 63085 event pairs, 1887 based on Foata normal form. 3/9816 useless extension candidates. Maximal degree in co-relation 53433. Up to 8853 conditions per place. [2024-06-28 02:03:22,098 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 237 selfloop transitions, 47 changer transitions 0/291 dead transitions. [2024-06-28 02:03:22,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 291 transitions, 4173 flow [2024-06-28 02:03:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:03:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:03:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-28 02:03:22,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-28 02:03:22,100 INFO L175 Difference]: Start difference. First operand has 200 places, 243 transitions, 3157 flow. Second operand 7 states and 168 transitions. [2024-06-28 02:03:22,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 291 transitions, 4173 flow [2024-06-28 02:03:22,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 291 transitions, 4049 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 02:03:22,490 INFO L231 Difference]: Finished difference. Result has 204 places, 255 transitions, 3362 flow [2024-06-28 02:03:22,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3362, PETRI_PLACES=204, PETRI_TRANSITIONS=255} [2024-06-28 02:03:22,491 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 153 predicate places. [2024-06-28 02:03:22,491 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 255 transitions, 3362 flow [2024-06-28 02:03:22,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:22,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:22,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:22,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:03:22,491 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:22,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:22,492 INFO L85 PathProgramCache]: Analyzing trace with hash 568870720, now seen corresponding path program 2 times [2024-06-28 02:03:22,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:22,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713059834] [2024-06-28 02:03:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:22,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:24,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:24,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713059834] [2024-06-28 02:03:24,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713059834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:24,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:24,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:24,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205456672] [2024-06-28 02:03:24,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:24,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:24,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:24,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:24,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:24,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 255 transitions, 3362 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:24,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:24,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:24,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:26,627 INFO L124 PetriNetUnfolderBase]: 6231/9822 cut-off events. [2024-06-28 02:03:26,627 INFO L125 PetriNetUnfolderBase]: For 194441/194445 co-relation queries the response was YES. [2024-06-28 02:03:26,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55013 conditions, 9822 events. 6231/9822 cut-off events. For 194441/194445 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 63303 event pairs, 1891 based on Foata normal form. 2/9820 useless extension candidates. Maximal degree in co-relation 54915. Up to 8996 conditions per place. [2024-06-28 02:03:26,728 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 244 selfloop transitions, 36 changer transitions 0/287 dead transitions. [2024-06-28 02:03:26,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 287 transitions, 4092 flow [2024-06-28 02:03:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:03:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:03:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-28 02:03:26,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49240121580547114 [2024-06-28 02:03:26,730 INFO L175 Difference]: Start difference. First operand has 204 places, 255 transitions, 3362 flow. Second operand 7 states and 162 transitions. [2024-06-28 02:03:26,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 287 transitions, 4092 flow [2024-06-28 02:03:27,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 287 transitions, 4007 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-28 02:03:27,175 INFO L231 Difference]: Finished difference. Result has 209 places, 255 transitions, 3356 flow [2024-06-28 02:03:27,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3277, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3356, PETRI_PLACES=209, PETRI_TRANSITIONS=255} [2024-06-28 02:03:27,176 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2024-06-28 02:03:27,176 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 255 transitions, 3356 flow [2024-06-28 02:03:27,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:27,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:27,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:27,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:03:27,176 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:27,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1754105310, now seen corresponding path program 2 times [2024-06-28 02:03:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:27,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939031513] [2024-06-28 02:03:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:27,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:29,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:29,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939031513] [2024-06-28 02:03:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939031513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:29,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:29,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:29,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588085283] [2024-06-28 02:03:29,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:29,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:29,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:29,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 255 transitions, 3356 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:29,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:29,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:29,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:31,425 INFO L124 PetriNetUnfolderBase]: 6309/9936 cut-off events. [2024-06-28 02:03:31,425 INFO L125 PetriNetUnfolderBase]: For 200225/200229 co-relation queries the response was YES. [2024-06-28 02:03:31,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55363 conditions, 9936 events. 6309/9936 cut-off events. For 200225/200229 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 63996 event pairs, 1848 based on Foata normal form. 3/9937 useless extension candidates. Maximal degree in co-relation 55262. Up to 9006 conditions per place. [2024-06-28 02:03:31,532 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 259 selfloop transitions, 38 changer transitions 0/304 dead transitions. [2024-06-28 02:03:31,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 304 transitions, 4355 flow [2024-06-28 02:03:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:03:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:03:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-28 02:03:31,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973404255319149 [2024-06-28 02:03:31,534 INFO L175 Difference]: Start difference. First operand has 209 places, 255 transitions, 3356 flow. Second operand 8 states and 187 transitions. [2024-06-28 02:03:31,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 304 transitions, 4355 flow [2024-06-28 02:03:31,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 304 transitions, 4229 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 02:03:31,944 INFO L231 Difference]: Finished difference. Result has 211 places, 263 transitions, 3456 flow [2024-06-28 02:03:31,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3230, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3456, PETRI_PLACES=211, PETRI_TRANSITIONS=263} [2024-06-28 02:03:31,945 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 160 predicate places. [2024-06-28 02:03:31,945 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 263 transitions, 3456 flow [2024-06-28 02:03:31,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:31,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:31,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:31,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:03:31,945 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:31,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash 759958762, now seen corresponding path program 3 times [2024-06-28 02:03:31,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:31,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891637745] [2024-06-28 02:03:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:31,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:33,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:33,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891637745] [2024-06-28 02:03:33,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891637745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:33,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:33,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:03:33,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658038854] [2024-06-28 02:03:33,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:33,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:03:33,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:33,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:03:33,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:03:33,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:33,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 263 transitions, 3456 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:33,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:33,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:33,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:35,764 INFO L124 PetriNetUnfolderBase]: 6306/9944 cut-off events. [2024-06-28 02:03:35,764 INFO L125 PetriNetUnfolderBase]: For 203473/203477 co-relation queries the response was YES. [2024-06-28 02:03:35,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55473 conditions, 9944 events. 6306/9944 cut-off events. For 203473/203477 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 64175 event pairs, 1879 based on Foata normal form. 2/9944 useless extension candidates. Maximal degree in co-relation 55371. Up to 9130 conditions per place. [2024-06-28 02:03:35,922 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 261 selfloop transitions, 25 changer transitions 0/293 dead transitions. [2024-06-28 02:03:35,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 293 transitions, 4108 flow [2024-06-28 02:03:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:03:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:03:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 02:03:35,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-28 02:03:35,924 INFO L175 Difference]: Start difference. First operand has 211 places, 263 transitions, 3456 flow. Second operand 6 states and 145 transitions. [2024-06-28 02:03:35,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 293 transitions, 4108 flow [2024-06-28 02:03:36,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 293 transitions, 3951 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-28 02:03:36,446 INFO L231 Difference]: Finished difference. Result has 211 places, 263 transitions, 3361 flow [2024-06-28 02:03:36,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3361, PETRI_PLACES=211, PETRI_TRANSITIONS=263} [2024-06-28 02:03:36,447 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 160 predicate places. [2024-06-28 02:03:36,447 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 263 transitions, 3361 flow [2024-06-28 02:03:36,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:36,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:36,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:36,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:03:36,448 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:36,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:36,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1753868160, now seen corresponding path program 3 times [2024-06-28 02:03:36,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:36,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977500939] [2024-06-28 02:03:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:36,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:38,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:38,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977500939] [2024-06-28 02:03:38,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977500939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:38,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:38,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:38,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477810942] [2024-06-28 02:03:38,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:38,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:38,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:38,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:38,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:38,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:38,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 263 transitions, 3361 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:38,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:38,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:38,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:40,444 INFO L124 PetriNetUnfolderBase]: 6300/9936 cut-off events. [2024-06-28 02:03:40,445 INFO L125 PetriNetUnfolderBase]: For 205632/205636 co-relation queries the response was YES. [2024-06-28 02:03:40,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55018 conditions, 9936 events. 6300/9936 cut-off events. For 205632/205636 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 64129 event pairs, 1857 based on Foata normal form. 3/9937 useless extension candidates. Maximal degree in co-relation 54916. Up to 9001 conditions per place. [2024-06-28 02:03:40,596 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 257 selfloop transitions, 39 changer transitions 0/303 dead transitions. [2024-06-28 02:03:40,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 303 transitions, 4149 flow [2024-06-28 02:03:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:03:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:03:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:03:40,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258358662613982 [2024-06-28 02:03:40,597 INFO L175 Difference]: Start difference. First operand has 211 places, 263 transitions, 3361 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:03:40,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 303 transitions, 4149 flow [2024-06-28 02:03:41,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 303 transitions, 4058 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 02:03:41,173 INFO L231 Difference]: Finished difference. Result has 212 places, 263 transitions, 3357 flow [2024-06-28 02:03:41,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3272, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3357, PETRI_PLACES=212, PETRI_TRANSITIONS=263} [2024-06-28 02:03:41,174 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 161 predicate places. [2024-06-28 02:03:41,174 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 263 transitions, 3357 flow [2024-06-28 02:03:41,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:41,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:41,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:41,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:03:41,174 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:41,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:41,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1754114238, now seen corresponding path program 1 times [2024-06-28 02:03:41,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:41,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252522984] [2024-06-28 02:03:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:41,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:44,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:44,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252522984] [2024-06-28 02:03:44,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252522984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:44,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:44,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:03:44,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824770680] [2024-06-28 02:03:44,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:44,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:03:44,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:44,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:03:44,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:03:44,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:03:44,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 263 transitions, 3357 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:44,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:44,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:03:44,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:46,350 INFO L124 PetriNetUnfolderBase]: 5876/9350 cut-off events. [2024-06-28 02:03:46,350 INFO L125 PetriNetUnfolderBase]: For 199616/199670 co-relation queries the response was YES. [2024-06-28 02:03:46,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52108 conditions, 9350 events. 5876/9350 cut-off events. For 199616/199670 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 60907 event pairs, 1765 based on Foata normal form. 47/9330 useless extension candidates. Maximal degree in co-relation 52006. Up to 8473 conditions per place. [2024-06-28 02:03:46,464 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 255 selfloop transitions, 16 changer transitions 0/290 dead transitions. [2024-06-28 02:03:46,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 290 transitions, 4011 flow [2024-06-28 02:03:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:03:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:03:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-28 02:03:46,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 02:03:46,466 INFO L175 Difference]: Start difference. First operand has 212 places, 263 transitions, 3357 flow. Second operand 6 states and 141 transitions. [2024-06-28 02:03:46,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 290 transitions, 4011 flow [2024-06-28 02:03:46,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 290 transitions, 3923 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 02:03:46,939 INFO L231 Difference]: Finished difference. Result has 213 places, 266 transitions, 3365 flow [2024-06-28 02:03:46,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3269, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3365, PETRI_PLACES=213, PETRI_TRANSITIONS=266} [2024-06-28 02:03:46,940 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 162 predicate places. [2024-06-28 02:03:46,940 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 266 transitions, 3365 flow [2024-06-28 02:03:46,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:46,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:46,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:46,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:03:46,941 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:46,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:46,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1222718466, now seen corresponding path program 1 times [2024-06-28 02:03:46,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:46,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016857512] [2024-06-28 02:03:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:46,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:49,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:49,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016857512] [2024-06-28 02:03:49,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016857512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:49,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:49,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:49,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762065163] [2024-06-28 02:03:49,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:49,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:49,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:49,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:49,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:49,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:49,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 266 transitions, 3365 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:49,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:49,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:49,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:51,926 INFO L124 PetriNetUnfolderBase]: 6344/9867 cut-off events. [2024-06-28 02:03:51,926 INFO L125 PetriNetUnfolderBase]: For 212102/212108 co-relation queries the response was YES. [2024-06-28 02:03:51,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55772 conditions, 9867 events. 6344/9867 cut-off events. For 212102/212108 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 62200 event pairs, 1555 based on Foata normal form. 7/9869 useless extension candidates. Maximal degree in co-relation 55669. Up to 8756 conditions per place. [2024-06-28 02:03:52,019 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 262 selfloop transitions, 61 changer transitions 0/330 dead transitions. [2024-06-28 02:03:52,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 330 transitions, 4640 flow [2024-06-28 02:03:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:03:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:03:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 02:03:52,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-28 02:03:52,020 INFO L175 Difference]: Start difference. First operand has 213 places, 266 transitions, 3365 flow. Second operand 7 states and 179 transitions. [2024-06-28 02:03:52,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 330 transitions, 4640 flow [2024-06-28 02:03:52,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 330 transitions, 4562 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 02:03:52,447 INFO L231 Difference]: Finished difference. Result has 218 places, 278 transitions, 3660 flow [2024-06-28 02:03:52,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3660, PETRI_PLACES=218, PETRI_TRANSITIONS=278} [2024-06-28 02:03:52,448 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 167 predicate places. [2024-06-28 02:03:52,448 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 278 transitions, 3660 flow [2024-06-28 02:03:52,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:52,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:52,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:52,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:03:52,449 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:52,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:52,449 INFO L85 PathProgramCache]: Analyzing trace with hash 470862860, now seen corresponding path program 2 times [2024-06-28 02:03:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:52,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870077504] [2024-06-28 02:03:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:52,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:03:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:03:55,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:03:55,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870077504] [2024-06-28 02:03:55,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870077504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:03:55,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:03:55,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:03:55,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275564350] [2024-06-28 02:03:55,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:03:55,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:03:55,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:03:55,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:03:55,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:03:55,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:03:55,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 278 transitions, 3660 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:55,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:03:55,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:03:55,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:03:57,487 INFO L124 PetriNetUnfolderBase]: 6473/10004 cut-off events. [2024-06-28 02:03:57,488 INFO L125 PetriNetUnfolderBase]: For 228853/228857 co-relation queries the response was YES. [2024-06-28 02:03:57,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59033 conditions, 10004 events. 6473/10004 cut-off events. For 228853/228857 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 62732 event pairs, 1208 based on Foata normal form. 2/10004 useless extension candidates. Maximal degree in co-relation 58927. Up to 9045 conditions per place. [2024-06-28 02:03:57,621 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 274 selfloop transitions, 67 changer transitions 0/348 dead transitions. [2024-06-28 02:03:57,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 348 transitions, 4925 flow [2024-06-28 02:03:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:03:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:03:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 02:03:57,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-28 02:03:57,623 INFO L175 Difference]: Start difference. First operand has 218 places, 278 transitions, 3660 flow. Second operand 8 states and 194 transitions. [2024-06-28 02:03:57,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 348 transitions, 4925 flow [2024-06-28 02:03:58,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 348 transitions, 4839 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-28 02:03:58,203 INFO L231 Difference]: Finished difference. Result has 226 places, 296 transitions, 4036 flow [2024-06-28 02:03:58,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4036, PETRI_PLACES=226, PETRI_TRANSITIONS=296} [2024-06-28 02:03:58,204 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 175 predicate places. [2024-06-28 02:03:58,204 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 296 transitions, 4036 flow [2024-06-28 02:03:58,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:03:58,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:03:58,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:03:58,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:03:58,205 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:03:58,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:03:58,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1172685700, now seen corresponding path program 3 times [2024-06-28 02:03:58,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:03:58,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906278356] [2024-06-28 02:03:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:03:58,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:03:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:00,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:00,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906278356] [2024-06-28 02:04:00,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906278356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:00,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:00,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:00,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809006676] [2024-06-28 02:04:00,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:00,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:00,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:00,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:00,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:00,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:00,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 296 transitions, 4036 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:00,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:00,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:00,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:03,303 INFO L124 PetriNetUnfolderBase]: 6496/10105 cut-off events. [2024-06-28 02:04:03,303 INFO L125 PetriNetUnfolderBase]: For 242266/242278 co-relation queries the response was YES. [2024-06-28 02:04:03,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59827 conditions, 10105 events. 6496/10105 cut-off events. For 242266/242278 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 63889 event pairs, 1619 based on Foata normal form. 11/10107 useless extension candidates. Maximal degree in co-relation 59717. Up to 8923 conditions per place. [2024-06-28 02:04:03,424 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 272 selfloop transitions, 75 changer transitions 0/354 dead transitions. [2024-06-28 02:04:03,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 354 transitions, 5427 flow [2024-06-28 02:04:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:04:03,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-28 02:04:03,426 INFO L175 Difference]: Start difference. First operand has 226 places, 296 transitions, 4036 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:04:03,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 354 transitions, 5427 flow [2024-06-28 02:04:04,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 354 transitions, 5293 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 02:04:04,048 INFO L231 Difference]: Finished difference. Result has 230 places, 305 transitions, 4286 flow [2024-06-28 02:04:04,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4286, PETRI_PLACES=230, PETRI_TRANSITIONS=305} [2024-06-28 02:04:04,049 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 179 predicate places. [2024-06-28 02:04:04,049 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 305 transitions, 4286 flow [2024-06-28 02:04:04,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:04,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:04,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:04,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:04:04,050 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:04,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1078499646, now seen corresponding path program 4 times [2024-06-28 02:04:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:04,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384464540] [2024-06-28 02:04:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:04,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:06,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:06,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384464540] [2024-06-28 02:04:06,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384464540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:06,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:06,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:06,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931900420] [2024-06-28 02:04:06,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:06,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:06,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:06,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:06,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:06,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:06,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 305 transitions, 4286 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:06,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:06,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:06,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:08,939 INFO L124 PetriNetUnfolderBase]: 6524/10147 cut-off events. [2024-06-28 02:04:08,940 INFO L125 PetriNetUnfolderBase]: For 253796/253808 co-relation queries the response was YES. [2024-06-28 02:04:09,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60647 conditions, 10147 events. 6524/10147 cut-off events. For 253796/253808 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 64213 event pairs, 1619 based on Foata normal form. 11/10149 useless extension candidates. Maximal degree in co-relation 60535. Up to 8941 conditions per place. [2024-06-28 02:04:09,045 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 268 selfloop transitions, 80 changer transitions 0/355 dead transitions. [2024-06-28 02:04:09,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 355 transitions, 5520 flow [2024-06-28 02:04:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-28 02:04:09,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167173252279635 [2024-06-28 02:04:09,046 INFO L175 Difference]: Start difference. First operand has 230 places, 305 transitions, 4286 flow. Second operand 7 states and 170 transitions. [2024-06-28 02:04:09,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 355 transitions, 5520 flow [2024-06-28 02:04:09,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 355 transitions, 5424 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-28 02:04:09,644 INFO L231 Difference]: Finished difference. Result has 237 places, 311 transitions, 4516 flow [2024-06-28 02:04:09,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4212, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4516, PETRI_PLACES=237, PETRI_TRANSITIONS=311} [2024-06-28 02:04:09,644 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 186 predicate places. [2024-06-28 02:04:09,644 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 311 transitions, 4516 flow [2024-06-28 02:04:09,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:09,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:09,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:09,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:04:09,645 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:09,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:09,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1304153644, now seen corresponding path program 5 times [2024-06-28 02:04:09,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:09,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375589939] [2024-06-28 02:04:09,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:09,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:12,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:12,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375589939] [2024-06-28 02:04:12,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375589939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:12,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:12,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:12,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105469335] [2024-06-28 02:04:12,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:12,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:12,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:12,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:12,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:12,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:12,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 311 transitions, 4516 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:12,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:12,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:12,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:15,154 INFO L124 PetriNetUnfolderBase]: 6552/10125 cut-off events. [2024-06-28 02:04:15,154 INFO L125 PetriNetUnfolderBase]: For 251564/251574 co-relation queries the response was YES. [2024-06-28 02:04:15,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61020 conditions, 10125 events. 6552/10125 cut-off events. For 251564/251574 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 63496 event pairs, 1226 based on Foata normal form. 6/10124 useless extension candidates. Maximal degree in co-relation 60904. Up to 8994 conditions per place. [2024-06-28 02:04:15,296 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 270 selfloop transitions, 96 changer transitions 0/373 dead transitions. [2024-06-28 02:04:15,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 373 transitions, 5885 flow [2024-06-28 02:04:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:04:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:04:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-28 02:04:15,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829787234042553 [2024-06-28 02:04:15,298 INFO L175 Difference]: Start difference. First operand has 237 places, 311 transitions, 4516 flow. Second operand 10 states and 227 transitions. [2024-06-28 02:04:15,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 373 transitions, 5885 flow [2024-06-28 02:04:16,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 373 transitions, 5667 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-28 02:04:16,134 INFO L231 Difference]: Finished difference. Result has 246 places, 317 transitions, 4683 flow [2024-06-28 02:04:16,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4314, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4683, PETRI_PLACES=246, PETRI_TRANSITIONS=317} [2024-06-28 02:04:16,135 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 195 predicate places. [2024-06-28 02:04:16,135 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 317 transitions, 4683 flow [2024-06-28 02:04:16,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:16,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:16,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:16,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:04:16,135 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:16,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:16,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1180929022, now seen corresponding path program 6 times [2024-06-28 02:04:16,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:16,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800098627] [2024-06-28 02:04:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:16,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:18,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:18,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800098627] [2024-06-28 02:04:18,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800098627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:18,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:18,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:18,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134561153] [2024-06-28 02:04:18,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:18,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:18,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:18,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:18,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 317 transitions, 4683 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:18,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:18,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:18,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:20,937 INFO L124 PetriNetUnfolderBase]: 6549/10085 cut-off events. [2024-06-28 02:04:20,938 INFO L125 PetriNetUnfolderBase]: For 258998/259006 co-relation queries the response was YES. [2024-06-28 02:04:21,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61265 conditions, 10085 events. 6549/10085 cut-off events. For 258998/259006 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 63187 event pairs, 1220 based on Foata normal form. 3/10080 useless extension candidates. Maximal degree in co-relation 61146. Up to 8726 conditions per place. [2024-06-28 02:04:21,063 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 232 selfloop transitions, 126 changer transitions 0/365 dead transitions. [2024-06-28 02:04:21,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 365 transitions, 5699 flow [2024-06-28 02:04:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-28 02:04:21,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501519756838906 [2024-06-28 02:04:21,065 INFO L175 Difference]: Start difference. First operand has 246 places, 317 transitions, 4683 flow. Second operand 7 states and 181 transitions. [2024-06-28 02:04:21,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 365 transitions, 5699 flow [2024-06-28 02:04:21,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 365 transitions, 5437 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-28 02:04:21,680 INFO L231 Difference]: Finished difference. Result has 247 places, 317 transitions, 4685 flow [2024-06-28 02:04:21,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4421, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4685, PETRI_PLACES=247, PETRI_TRANSITIONS=317} [2024-06-28 02:04:21,681 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-06-28 02:04:21,681 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 317 transitions, 4685 flow [2024-06-28 02:04:21,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:21,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:21,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:21,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:04:21,686 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:21,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:21,686 INFO L85 PathProgramCache]: Analyzing trace with hash -18891781, now seen corresponding path program 1 times [2024-06-28 02:04:21,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:21,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427695177] [2024-06-28 02:04:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:21,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:23,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:23,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427695177] [2024-06-28 02:04:23,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427695177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:23,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:23,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:23,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006604323] [2024-06-28 02:04:23,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:23,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:23,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:23,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:23,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 317 transitions, 4685 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:23,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:23,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:23,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:26,027 INFO L124 PetriNetUnfolderBase]: 6585/10369 cut-off events. [2024-06-28 02:04:26,027 INFO L125 PetriNetUnfolderBase]: For 271300/271307 co-relation queries the response was YES. [2024-06-28 02:04:26,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61839 conditions, 10369 events. 6585/10369 cut-off events. For 271300/271307 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 67193 event pairs, 1929 based on Foata normal form. 5/10371 useless extension candidates. Maximal degree in co-relation 61721. Up to 9271 conditions per place. [2024-06-28 02:04:26,161 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 293 selfloop transitions, 56 changer transitions 0/356 dead transitions. [2024-06-28 02:04:26,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 356 transitions, 5645 flow [2024-06-28 02:04:26,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 02:04:26,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075987841945289 [2024-06-28 02:04:26,162 INFO L175 Difference]: Start difference. First operand has 247 places, 317 transitions, 4685 flow. Second operand 7 states and 167 transitions. [2024-06-28 02:04:26,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 356 transitions, 5645 flow [2024-06-28 02:04:26,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 356 transitions, 5490 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 02:04:26,939 INFO L231 Difference]: Finished difference. Result has 249 places, 321 transitions, 4717 flow [2024-06-28 02:04:26,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4532, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4717, PETRI_PLACES=249, PETRI_TRANSITIONS=321} [2024-06-28 02:04:26,939 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 198 predicate places. [2024-06-28 02:04:26,939 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 321 transitions, 4717 flow [2024-06-28 02:04:26,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:26,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:26,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:26,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:04:26,940 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:26,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:26,940 INFO L85 PathProgramCache]: Analyzing trace with hash -706997399, now seen corresponding path program 2 times [2024-06-28 02:04:26,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:26,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534579667] [2024-06-28 02:04:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:26,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:29,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:29,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534579667] [2024-06-28 02:04:29,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534579667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:29,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:29,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:04:29,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296187357] [2024-06-28 02:04:29,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:29,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:04:29,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:04:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:04:29,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:29,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 321 transitions, 4717 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:29,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:29,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:29,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:32,462 INFO L124 PetriNetUnfolderBase]: 6621/10410 cut-off events. [2024-06-28 02:04:32,463 INFO L125 PetriNetUnfolderBase]: For 269620/269624 co-relation queries the response was YES. [2024-06-28 02:04:32,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61867 conditions, 10410 events. 6621/10410 cut-off events. For 269620/269624 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 67275 event pairs, 1921 based on Foata normal form. 3/10409 useless extension candidates. Maximal degree in co-relation 61749. Up to 9303 conditions per place. [2024-06-28 02:04:32,583 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 307 selfloop transitions, 64 changer transitions 0/378 dead transitions. [2024-06-28 02:04:32,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 378 transitions, 5879 flow [2024-06-28 02:04:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:04:32,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:04:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-28 02:04:32,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-28 02:04:32,585 INFO L175 Difference]: Start difference. First operand has 249 places, 321 transitions, 4717 flow. Second operand 10 states and 230 transitions. [2024-06-28 02:04:32,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 378 transitions, 5879 flow [2024-06-28 02:04:33,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 378 transitions, 5689 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 02:04:33,289 INFO L231 Difference]: Finished difference. Result has 254 places, 325 transitions, 4736 flow [2024-06-28 02:04:33,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4541, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4736, PETRI_PLACES=254, PETRI_TRANSITIONS=325} [2024-06-28 02:04:33,292 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 203 predicate places. [2024-06-28 02:04:33,292 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 325 transitions, 4736 flow [2024-06-28 02:04:33,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:33,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:33,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:33,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:04:33,293 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:33,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:33,295 INFO L85 PathProgramCache]: Analyzing trace with hash -802714089, now seen corresponding path program 3 times [2024-06-28 02:04:33,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:33,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490146928] [2024-06-28 02:04:33,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:33,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:35,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:35,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490146928] [2024-06-28 02:04:35,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490146928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:35,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:35,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:04:35,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413287877] [2024-06-28 02:04:35,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:35,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:04:35,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:35,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:04:35,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:04:35,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:35,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 325 transitions, 4736 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:35,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:35,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:35,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:38,067 INFO L124 PetriNetUnfolderBase]: 6615/10397 cut-off events. [2024-06-28 02:04:38,068 INFO L125 PetriNetUnfolderBase]: For 270833/270837 co-relation queries the response was YES. [2024-06-28 02:04:38,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61627 conditions, 10397 events. 6615/10397 cut-off events. For 270833/270837 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 67196 event pairs, 1920 based on Foata normal form. 3/10396 useless extension candidates. Maximal degree in co-relation 61509. Up to 9298 conditions per place. [2024-06-28 02:04:38,193 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 297 selfloop transitions, 63 changer transitions 0/367 dead transitions. [2024-06-28 02:04:38,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 367 transitions, 5670 flow [2024-06-28 02:04:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:04:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:04:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:04:38,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-06-28 02:04:38,194 INFO L175 Difference]: Start difference. First operand has 254 places, 325 transitions, 4736 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:04:38,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 367 transitions, 5670 flow [2024-06-28 02:04:38,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 367 transitions, 5408 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-28 02:04:38,863 INFO L231 Difference]: Finished difference. Result has 252 places, 325 transitions, 4607 flow [2024-06-28 02:04:38,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4607, PETRI_PLACES=252, PETRI_TRANSITIONS=325} [2024-06-28 02:04:38,864 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 201 predicate places. [2024-06-28 02:04:38,864 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 325 transitions, 4607 flow [2024-06-28 02:04:38,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:38,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:38,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:38,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:04:38,864 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:38,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1457308183, now seen corresponding path program 4 times [2024-06-28 02:04:38,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:38,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373594859] [2024-06-28 02:04:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:38,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:40,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:40,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373594859] [2024-06-28 02:04:40,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373594859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:40,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:40,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:40,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009036949] [2024-06-28 02:04:40,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:40,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:40,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:40,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:40,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:40,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:40,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 325 transitions, 4607 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:40,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:40,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:40,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:43,378 INFO L124 PetriNetUnfolderBase]: 6651/10460 cut-off events. [2024-06-28 02:04:43,379 INFO L125 PetriNetUnfolderBase]: For 274130/274134 co-relation queries the response was YES. [2024-06-28 02:04:43,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61485 conditions, 10460 events. 6651/10460 cut-off events. For 274130/274134 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67668 event pairs, 1872 based on Foata normal form. 3/10461 useless extension candidates. Maximal degree in co-relation 61368. Up to 9457 conditions per place. [2024-06-28 02:04:43,489 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 319 selfloop transitions, 43 changer transitions 0/369 dead transitions. [2024-06-28 02:04:43,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 369 transitions, 5591 flow [2024-06-28 02:04:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:04:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:04:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-28 02:04:43,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946808510638298 [2024-06-28 02:04:43,490 INFO L175 Difference]: Start difference. First operand has 252 places, 325 transitions, 4607 flow. Second operand 8 states and 186 transitions. [2024-06-28 02:04:43,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 369 transitions, 5591 flow [2024-06-28 02:04:44,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 369 transitions, 5453 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 02:04:44,233 INFO L231 Difference]: Finished difference. Result has 253 places, 329 transitions, 4611 flow [2024-06-28 02:04:44,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4611, PETRI_PLACES=253, PETRI_TRANSITIONS=329} [2024-06-28 02:04:44,234 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 202 predicate places. [2024-06-28 02:04:44,234 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 329 transitions, 4611 flow [2024-06-28 02:04:44,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:44,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:44,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:44,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:04:44,234 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:44,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:44,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1132197853, now seen corresponding path program 5 times [2024-06-28 02:04:44,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:44,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119502348] [2024-06-28 02:04:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:44,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:46,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:46,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119502348] [2024-06-28 02:04:46,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119502348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:46,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:46,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:04:46,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173016464] [2024-06-28 02:04:46,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:46,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:04:46,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:46,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:04:46,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:04:46,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:46,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 329 transitions, 4611 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:46,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:46,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:46,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:48,285 INFO L124 PetriNetUnfolderBase]: 6645/10452 cut-off events. [2024-06-28 02:04:48,286 INFO L125 PetriNetUnfolderBase]: For 273342/273346 co-relation queries the response was YES. [2024-06-28 02:04:48,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60755 conditions, 10452 events. 6645/10452 cut-off events. For 273342/273346 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67571 event pairs, 1881 based on Foata normal form. 3/10453 useless extension candidates. Maximal degree in co-relation 60637. Up to 9452 conditions per place. [2024-06-28 02:04:48,411 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 318 selfloop transitions, 43 changer transitions 0/368 dead transitions. [2024-06-28 02:04:48,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 368 transitions, 5433 flow [2024-06-28 02:04:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:04:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:04:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:04:48,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-28 02:04:48,412 INFO L175 Difference]: Start difference. First operand has 253 places, 329 transitions, 4611 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:04:48,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 368 transitions, 5433 flow [2024-06-28 02:04:48,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 368 transitions, 5336 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 02:04:48,971 INFO L231 Difference]: Finished difference. Result has 255 places, 329 transitions, 4607 flow [2024-06-28 02:04:48,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4607, PETRI_PLACES=255, PETRI_TRANSITIONS=329} [2024-06-28 02:04:48,987 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 204 predicate places. [2024-06-28 02:04:48,987 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 329 transitions, 4607 flow [2024-06-28 02:04:48,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:48,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:48,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:48,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:04:48,988 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:48,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:48,988 INFO L85 PathProgramCache]: Analyzing trace with hash 745667907, now seen corresponding path program 1 times [2024-06-28 02:04:48,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:48,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126109874] [2024-06-28 02:04:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:48,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:52,307 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 02:04:52,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:52,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126109874] [2024-06-28 02:04:52,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126109874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:52,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:52,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:04:52,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149727140] [2024-06-28 02:04:52,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:52,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:04:52,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:52,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:04:52,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:04:52,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:52,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 329 transitions, 4607 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:52,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:52,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:52,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:04:54,853 INFO L124 PetriNetUnfolderBase]: 6694/10445 cut-off events. [2024-06-28 02:04:54,853 INFO L125 PetriNetUnfolderBase]: For 276256/276262 co-relation queries the response was YES. [2024-06-28 02:04:54,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61320 conditions, 10445 events. 6694/10445 cut-off events. For 276256/276262 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 66466 event pairs, 1575 based on Foata normal form. 7/10450 useless extension candidates. Maximal degree in co-relation 61201. Up to 9164 conditions per place. [2024-06-28 02:04:54,977 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 311 selfloop transitions, 91 changer transitions 0/409 dead transitions. [2024-06-28 02:04:54,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 409 transitions, 5911 flow [2024-06-28 02:04:54,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:04:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:04:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-28 02:04:54,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2024-06-28 02:04:54,979 INFO L175 Difference]: Start difference. First operand has 255 places, 329 transitions, 4607 flow. Second operand 9 states and 230 transitions. [2024-06-28 02:04:54,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 409 transitions, 5911 flow [2024-06-28 02:04:55,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 409 transitions, 5782 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 02:04:55,732 INFO L231 Difference]: Finished difference. Result has 257 places, 335 transitions, 4793 flow [2024-06-28 02:04:55,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4478, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4793, PETRI_PLACES=257, PETRI_TRANSITIONS=335} [2024-06-28 02:04:55,732 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 206 predicate places. [2024-06-28 02:04:55,732 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 335 transitions, 4793 flow [2024-06-28 02:04:55,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:55,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:04:55,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:04:55,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:04:55,733 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:04:55,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:04:55,733 INFO L85 PathProgramCache]: Analyzing trace with hash 750136557, now seen corresponding path program 2 times [2024-06-28 02:04:55,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:04:55,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241085309] [2024-06-28 02:04:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:04:55,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:04:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:04:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:04:58,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:04:58,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241085309] [2024-06-28 02:04:58,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241085309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:04:58,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:04:58,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:04:58,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127611576] [2024-06-28 02:04:58,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:04:58,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:04:58,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:04:58,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:04:58,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:04:58,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:04:58,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 335 transitions, 4793 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:04:58,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:04:58,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:04:58,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:01,130 INFO L124 PetriNetUnfolderBase]: 6743/10346 cut-off events. [2024-06-28 02:05:01,131 INFO L125 PetriNetUnfolderBase]: For 299949/299953 co-relation queries the response was YES. [2024-06-28 02:05:01,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63669 conditions, 10346 events. 6743/10346 cut-off events. For 299949/299953 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 64760 event pairs, 1247 based on Foata normal form. 2/10342 useless extension candidates. Maximal degree in co-relation 63548. Up to 8462 conditions per place. [2024-06-28 02:05:01,243 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 243 selfloop transitions, 153 changer transitions 0/403 dead transitions. [2024-06-28 02:05:01,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 403 transitions, 6233 flow [2024-06-28 02:05:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-28 02:05:01,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-28 02:05:01,245 INFO L175 Difference]: Start difference. First operand has 257 places, 335 transitions, 4793 flow. Second operand 8 states and 207 transitions. [2024-06-28 02:05:01,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 403 transitions, 6233 flow [2024-06-28 02:05:01,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 403 transitions, 6094 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:01,974 INFO L231 Difference]: Finished difference. Result has 262 places, 344 transitions, 5258 flow [2024-06-28 02:05:01,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4654, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5258, PETRI_PLACES=262, PETRI_TRANSITIONS=344} [2024-06-28 02:05:01,975 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 211 predicate places. [2024-06-28 02:05:01,975 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 344 transitions, 5258 flow [2024-06-28 02:05:01,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:01,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:01,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:01,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:05:01,977 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:01,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:01,977 INFO L85 PathProgramCache]: Analyzing trace with hash 417942855, now seen corresponding path program 1 times [2024-06-28 02:05:01,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:01,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552508787] [2024-06-28 02:05:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:01,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:04,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:04,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552508787] [2024-06-28 02:05:04,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552508787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:04,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:04,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:04,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600052745] [2024-06-28 02:05:04,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:04,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:04,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:04,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:04,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 344 transitions, 5258 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:04,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:04,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:04,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:07,620 INFO L124 PetriNetUnfolderBase]: 6818/10581 cut-off events. [2024-06-28 02:05:07,620 INFO L125 PetriNetUnfolderBase]: For 324963/324969 co-relation queries the response was YES. [2024-06-28 02:05:07,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67902 conditions, 10581 events. 6818/10581 cut-off events. For 324963/324969 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 67200 event pairs, 1566 based on Foata normal form. 7/10583 useless extension candidates. Maximal degree in co-relation 67777. Up to 9306 conditions per place. [2024-06-28 02:05:07,742 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 306 selfloop transitions, 90 changer transitions 0/403 dead transitions. [2024-06-28 02:05:07,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 403 transitions, 6657 flow [2024-06-28 02:05:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:05:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:05:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 02:05:07,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-28 02:05:07,744 INFO L175 Difference]: Start difference. First operand has 262 places, 344 transitions, 5258 flow. Second operand 7 states and 179 transitions. [2024-06-28 02:05:07,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 403 transitions, 6657 flow [2024-06-28 02:05:08,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 403 transitions, 6500 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-28 02:05:08,570 INFO L231 Difference]: Finished difference. Result has 266 places, 353 transitions, 5460 flow [2024-06-28 02:05:08,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5101, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5460, PETRI_PLACES=266, PETRI_TRANSITIONS=353} [2024-06-28 02:05:08,571 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 215 predicate places. [2024-06-28 02:05:08,571 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 353 transitions, 5460 flow [2024-06-28 02:05:08,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:08,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:08,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:08,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 02:05:08,572 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:08,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash 750435459, now seen corresponding path program 1 times [2024-06-28 02:05:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:08,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730941303] [2024-06-28 02:05:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:11,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:11,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730941303] [2024-06-28 02:05:11,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730941303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:11,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:11,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:11,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004024391] [2024-06-28 02:05:11,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:11,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:11,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:11,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:11,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:11,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:11,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 353 transitions, 5460 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:11,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:11,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:11,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:14,532 INFO L124 PetriNetUnfolderBase]: 7020/10863 cut-off events. [2024-06-28 02:05:14,533 INFO L125 PetriNetUnfolderBase]: For 344074/344080 co-relation queries the response was YES. [2024-06-28 02:05:14,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69341 conditions, 10863 events. 7020/10863 cut-off events. For 344074/344080 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 68766 event pairs, 1587 based on Foata normal form. 8/10866 useless extension candidates. Maximal degree in co-relation 69214. Up to 9234 conditions per place. [2024-06-28 02:05:14,659 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 327 selfloop transitions, 110 changer transitions 0/444 dead transitions. [2024-06-28 02:05:14,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 444 transitions, 7226 flow [2024-06-28 02:05:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:05:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:05:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-28 02:05:14,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276595744680851 [2024-06-28 02:05:14,661 INFO L175 Difference]: Start difference. First operand has 266 places, 353 transitions, 5460 flow. Second operand 10 states and 248 transitions. [2024-06-28 02:05:14,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 444 transitions, 7226 flow [2024-06-28 02:05:15,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 444 transitions, 7105 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-28 02:05:15,502 INFO L231 Difference]: Finished difference. Result has 276 places, 371 transitions, 5875 flow [2024-06-28 02:05:15,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5339, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5875, PETRI_PLACES=276, PETRI_TRANSITIONS=371} [2024-06-28 02:05:15,503 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 225 predicate places. [2024-06-28 02:05:15,503 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 371 transitions, 5875 flow [2024-06-28 02:05:15,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:15,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:15,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:15,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 02:05:15,504 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:15,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1534717307, now seen corresponding path program 2 times [2024-06-28 02:05:15,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:15,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601697632] [2024-06-28 02:05:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:15,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:19,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:19,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601697632] [2024-06-28 02:05:19,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601697632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:19,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:19,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:19,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53785919] [2024-06-28 02:05:19,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:19,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:19,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:19,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:19,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:19,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 371 transitions, 5875 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:19,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:19,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:19,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:22,218 INFO L124 PetriNetUnfolderBase]: 7043/10894 cut-off events. [2024-06-28 02:05:22,218 INFO L125 PetriNetUnfolderBase]: For 372600/372606 co-relation queries the response was YES. [2024-06-28 02:05:22,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72299 conditions, 10894 events. 7043/10894 cut-off events. For 372600/372606 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 68963 event pairs, 1594 based on Foata normal form. 7/10896 useless extension candidates. Maximal degree in co-relation 72168. Up to 9602 conditions per place. [2024-06-28 02:05:22,356 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 328 selfloop transitions, 95 changer transitions 0/430 dead transitions. [2024-06-28 02:05:22,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 430 transitions, 7159 flow [2024-06-28 02:05:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 02:05:22,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-28 02:05:22,358 INFO L175 Difference]: Start difference. First operand has 276 places, 371 transitions, 5875 flow. Second operand 8 states and 199 transitions. [2024-06-28 02:05:22,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 430 transitions, 7159 flow [2024-06-28 02:05:23,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 430 transitions, 6929 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:23,409 INFO L231 Difference]: Finished difference. Result has 279 places, 374 transitions, 5905 flow [2024-06-28 02:05:23,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5648, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5905, PETRI_PLACES=279, PETRI_TRANSITIONS=374} [2024-06-28 02:05:23,410 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 228 predicate places. [2024-06-28 02:05:23,410 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 374 transitions, 5905 flow [2024-06-28 02:05:23,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:23,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:23,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:23,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 02:05:23,411 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:23,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:23,411 INFO L85 PathProgramCache]: Analyzing trace with hash 750435087, now seen corresponding path program 3 times [2024-06-28 02:05:23,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:23,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935399003] [2024-06-28 02:05:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:23,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:26,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:26,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935399003] [2024-06-28 02:05:26,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935399003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:26,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:26,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:26,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034645523] [2024-06-28 02:05:26,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:26,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:26,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:26,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:26,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 374 transitions, 5905 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:26,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:26,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:26,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:29,889 INFO L124 PetriNetUnfolderBase]: 7066/10817 cut-off events. [2024-06-28 02:05:29,890 INFO L125 PetriNetUnfolderBase]: For 378293/378297 co-relation queries the response was YES. [2024-06-28 02:05:29,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72380 conditions, 10817 events. 7066/10817 cut-off events. For 378293/378297 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 67779 event pairs, 1285 based on Foata normal form. 2/10813 useless extension candidates. Maximal degree in co-relation 72247. Up to 8818 conditions per place. [2024-06-28 02:05:30,039 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 261 selfloop transitions, 164 changer transitions 0/432 dead transitions. [2024-06-28 02:05:30,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 432 transitions, 7327 flow [2024-06-28 02:05:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:05:30,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:05:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-28 02:05:30,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-28 02:05:30,041 INFO L175 Difference]: Start difference. First operand has 279 places, 374 transitions, 5905 flow. Second operand 8 states and 203 transitions. [2024-06-28 02:05:30,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 432 transitions, 7327 flow [2024-06-28 02:05:31,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 432 transitions, 7111 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 02:05:31,022 INFO L231 Difference]: Finished difference. Result has 281 places, 377 transitions, 6075 flow [2024-06-28 02:05:31,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5689, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6075, PETRI_PLACES=281, PETRI_TRANSITIONS=377} [2024-06-28 02:05:31,023 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 230 predicate places. [2024-06-28 02:05:31,023 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 377 transitions, 6075 flow [2024-06-28 02:05:31,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:31,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:31,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:31,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 02:05:31,024 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:31,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:31,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1712086163, now seen corresponding path program 2 times [2024-06-28 02:05:31,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:31,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461408686] [2024-06-28 02:05:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:31,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:34,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:34,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461408686] [2024-06-28 02:05:34,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461408686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:34,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:34,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:34,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719276719] [2024-06-28 02:05:34,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:34,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:34,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:34,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:34,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:34,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:34,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 377 transitions, 6075 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:34,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:34,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:34,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:37,349 INFO L124 PetriNetUnfolderBase]: 7396/11350 cut-off events. [2024-06-28 02:05:37,349 INFO L125 PetriNetUnfolderBase]: For 415198/415202 co-relation queries the response was YES. [2024-06-28 02:05:37,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77011 conditions, 11350 events. 7396/11350 cut-off events. For 415198/415202 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 71526 event pairs, 1250 based on Foata normal form. 5/11353 useless extension candidates. Maximal degree in co-relation 76877. Up to 9828 conditions per place. [2024-06-28 02:05:37,475 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 387 selfloop transitions, 98 changer transitions 0/492 dead transitions. [2024-06-28 02:05:37,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 492 transitions, 8372 flow [2024-06-28 02:05:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:05:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:05:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-28 02:05:37,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164410058027079 [2024-06-28 02:05:37,477 INFO L175 Difference]: Start difference. First operand has 281 places, 377 transitions, 6075 flow. Second operand 11 states and 267 transitions. [2024-06-28 02:05:37,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 492 transitions, 8372 flow [2024-06-28 02:05:38,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 492 transitions, 8041 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:38,529 INFO L231 Difference]: Finished difference. Result has 289 places, 412 transitions, 6714 flow [2024-06-28 02:05:38,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5768, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6714, PETRI_PLACES=289, PETRI_TRANSITIONS=412} [2024-06-28 02:05:38,530 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 238 predicate places. [2024-06-28 02:05:38,530 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 412 transitions, 6714 flow [2024-06-28 02:05:38,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:38,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:38,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:38,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 02:05:38,530 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:38,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1711848827, now seen corresponding path program 3 times [2024-06-28 02:05:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:38,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639867819] [2024-06-28 02:05:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:38,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:41,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:41,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639867819] [2024-06-28 02:05:41,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639867819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:41,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:41,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:05:41,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094512529] [2024-06-28 02:05:41,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:41,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:05:41,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:41,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:05:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:05:41,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:41,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 412 transitions, 6714 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:41,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:41,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:41,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:44,892 INFO L124 PetriNetUnfolderBase]: 7714/11870 cut-off events. [2024-06-28 02:05:44,892 INFO L125 PetriNetUnfolderBase]: For 449725/449733 co-relation queries the response was YES. [2024-06-28 02:05:44,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84713 conditions, 11870 events. 7714/11870 cut-off events. For 449725/449733 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 75460 event pairs, 1323 based on Foata normal form. 6/11871 useless extension candidates. Maximal degree in co-relation 84576. Up to 10620 conditions per place. [2024-06-28 02:05:45,037 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 410 selfloop transitions, 97 changer transitions 0/514 dead transitions. [2024-06-28 02:05:45,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 514 transitions, 9328 flow [2024-06-28 02:05:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:05:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:05:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-28 02:05:45,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-28 02:05:45,040 INFO L175 Difference]: Start difference. First operand has 289 places, 412 transitions, 6714 flow. Second operand 9 states and 207 transitions. [2024-06-28 02:05:45,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 514 transitions, 9328 flow [2024-06-28 02:05:46,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 514 transitions, 9072 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-28 02:05:46,288 INFO L231 Difference]: Finished difference. Result has 296 places, 461 transitions, 8083 flow [2024-06-28 02:05:46,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6495, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8083, PETRI_PLACES=296, PETRI_TRANSITIONS=461} [2024-06-28 02:05:46,288 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 245 predicate places. [2024-06-28 02:05:46,289 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 461 transitions, 8083 flow [2024-06-28 02:05:46,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:46,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:46,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:46,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 02:05:46,289 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:46,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:46,289 INFO L85 PathProgramCache]: Analyzing trace with hash 927566979, now seen corresponding path program 3 times [2024-06-28 02:05:46,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:46,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123507293] [2024-06-28 02:05:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:46,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:49,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:49,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123507293] [2024-06-28 02:05:49,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123507293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:49,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:49,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:49,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375588501] [2024-06-28 02:05:49,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:49,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:49,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:49,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:49,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:49,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:49,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 461 transitions, 8083 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:49,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:49,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:49,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:05:52,504 INFO L124 PetriNetUnfolderBase]: 7702/11811 cut-off events. [2024-06-28 02:05:52,505 INFO L125 PetriNetUnfolderBase]: For 454002/454004 co-relation queries the response was YES. [2024-06-28 02:05:52,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84712 conditions, 11811 events. 7702/11811 cut-off events. For 454002/454004 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 74669 event pairs, 1250 based on Foata normal form. 4/11813 useless extension candidates. Maximal degree in co-relation 84569. Up to 10008 conditions per place. [2024-06-28 02:05:52,643 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 406 selfloop transitions, 135 changer transitions 0/548 dead transitions. [2024-06-28 02:05:52,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 548 transitions, 9874 flow [2024-06-28 02:05:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:05:52,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:05:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-28 02:05:52,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164410058027079 [2024-06-28 02:05:52,645 INFO L175 Difference]: Start difference. First operand has 296 places, 461 transitions, 8083 flow. Second operand 11 states and 267 transitions. [2024-06-28 02:05:52,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 548 transitions, 9874 flow [2024-06-28 02:05:54,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 548 transitions, 9772 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 02:05:54,291 INFO L231 Difference]: Finished difference. Result has 305 places, 473 transitions, 8606 flow [2024-06-28 02:05:54,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7981, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8606, PETRI_PLACES=305, PETRI_TRANSITIONS=473} [2024-06-28 02:05:54,291 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 254 predicate places. [2024-06-28 02:05:54,291 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 473 transitions, 8606 flow [2024-06-28 02:05:54,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:54,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:05:54,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:05:54,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 02:05:54,292 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:05:54,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:05:54,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1192378441, now seen corresponding path program 4 times [2024-06-28 02:05:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:05:54,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269741568] [2024-06-28 02:05:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:05:54,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:05:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:05:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:05:57,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:05:57,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269741568] [2024-06-28 02:05:57,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269741568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:05:57,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:05:57,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:05:57,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365374144] [2024-06-28 02:05:57,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:05:57,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:05:57,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:05:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:05:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:05:57,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:05:57,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 473 transitions, 8606 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:05:57,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:05:57,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:05:57,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:00,973 INFO L124 PetriNetUnfolderBase]: 7751/11897 cut-off events. [2024-06-28 02:06:00,973 INFO L125 PetriNetUnfolderBase]: For 470755/470757 co-relation queries the response was YES. [2024-06-28 02:06:01,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86643 conditions, 11897 events. 7751/11897 cut-off events. For 470755/470757 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 75426 event pairs, 1276 based on Foata normal form. 1/11896 useless extension candidates. Maximal degree in co-relation 86498. Up to 10503 conditions per place. [2024-06-28 02:06:01,125 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 391 selfloop transitions, 139 changer transitions 0/537 dead transitions. [2024-06-28 02:06:01,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 537 transitions, 10197 flow [2024-06-28 02:06:01,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:06:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:06:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-28 02:06:01,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508274231678487 [2024-06-28 02:06:01,127 INFO L175 Difference]: Start difference. First operand has 305 places, 473 transitions, 8606 flow. Second operand 9 states and 215 transitions. [2024-06-28 02:06:01,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 537 transitions, 10197 flow [2024-06-28 02:06:02,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 537 transitions, 9853 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-28 02:06:03,002 INFO L231 Difference]: Finished difference. Result has 308 places, 479 transitions, 8715 flow [2024-06-28 02:06:03,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8262, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8715, PETRI_PLACES=308, PETRI_TRANSITIONS=479} [2024-06-28 02:06:03,004 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 257 predicate places. [2024-06-28 02:06:03,004 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 479 transitions, 8715 flow [2024-06-28 02:06:03,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:03,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:03,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:03,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 02:06:03,005 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:03,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:03,005 INFO L85 PathProgramCache]: Analyzing trace with hash 927813057, now seen corresponding path program 1 times [2024-06-28 02:06:03,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:03,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149102508] [2024-06-28 02:06:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:03,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:06,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:06,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149102508] [2024-06-28 02:06:06,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149102508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:06,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:06,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:06:06,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810497102] [2024-06-28 02:06:06,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:06,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:06:06,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:06:06,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:06:07,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-28 02:06:07,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 479 transitions, 8715 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:07,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:07,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-28 02:06:07,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:10,351 INFO L124 PetriNetUnfolderBase]: 7541/11636 cut-off events. [2024-06-28 02:06:10,351 INFO L125 PetriNetUnfolderBase]: For 501392/501458 co-relation queries the response was YES. [2024-06-28 02:06:10,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84550 conditions, 11636 events. 7541/11636 cut-off events. For 501392/501458 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 74669 event pairs, 1183 based on Foata normal form. 70/11638 useless extension candidates. Maximal degree in co-relation 84403. Up to 9869 conditions per place. [2024-06-28 02:06:10,507 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 416 selfloop transitions, 81 changer transitions 0/541 dead transitions. [2024-06-28 02:06:10,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 541 transitions, 9985 flow [2024-06-28 02:06:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:06:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:06:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-28 02:06:10,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271867612293144 [2024-06-28 02:06:10,508 INFO L175 Difference]: Start difference. First operand has 308 places, 479 transitions, 8715 flow. Second operand 9 states and 223 transitions. [2024-06-28 02:06:10,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 541 transitions, 9985 flow [2024-06-28 02:06:12,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 541 transitions, 9690 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 02:06:12,099 INFO L231 Difference]: Finished difference. Result has 311 places, 481 transitions, 8639 flow [2024-06-28 02:06:12,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8420, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8639, PETRI_PLACES=311, PETRI_TRANSITIONS=481} [2024-06-28 02:06:12,099 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 260 predicate places. [2024-06-28 02:06:12,100 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 481 transitions, 8639 flow [2024-06-28 02:06:12,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:12,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:12,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:12,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 02:06:12,100 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:12,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:12,101 INFO L85 PathProgramCache]: Analyzing trace with hash -825164563, now seen corresponding path program 5 times [2024-06-28 02:06:12,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:12,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103552590] [2024-06-28 02:06:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:12,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:15,353 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 02:06:15,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:15,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103552590] [2024-06-28 02:06:15,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103552590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:15,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:15,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:15,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64019009] [2024-06-28 02:06:15,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:15,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:15,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:15,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:15,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:06:15,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:15,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 481 transitions, 8639 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:15,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:15,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:15,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:18,699 INFO L124 PetriNetUnfolderBase]: 7986/12161 cut-off events. [2024-06-28 02:06:18,700 INFO L125 PetriNetUnfolderBase]: For 510574/510580 co-relation queries the response was YES. [2024-06-28 02:06:18,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88588 conditions, 12161 events. 7986/12161 cut-off events. For 510574/510580 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 76661 event pairs, 1538 based on Foata normal form. 2/12141 useless extension candidates. Maximal degree in co-relation 88440. Up to 9789 conditions per place. [2024-06-28 02:06:18,884 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 296 selfloop transitions, 241 changer transitions 0/544 dead transitions. [2024-06-28 02:06:18,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 544 transitions, 10593 flow [2024-06-28 02:06:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:06:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:06:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-28 02:06:18,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-28 02:06:18,885 INFO L175 Difference]: Start difference. First operand has 311 places, 481 transitions, 8639 flow. Second operand 8 states and 203 transitions. [2024-06-28 02:06:18,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 544 transitions, 10593 flow [2024-06-28 02:06:20,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 544 transitions, 10398 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 02:06:20,803 INFO L231 Difference]: Finished difference. Result has 312 places, 487 transitions, 9098 flow [2024-06-28 02:06:20,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8444, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9098, PETRI_PLACES=312, PETRI_TRANSITIONS=487} [2024-06-28 02:06:20,803 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 261 predicate places. [2024-06-28 02:06:20,804 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 487 transitions, 9098 flow [2024-06-28 02:06:20,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:20,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:20,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:20,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 02:06:20,804 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:20,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:20,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1604402857, now seen corresponding path program 4 times [2024-06-28 02:06:20,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:20,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025503068] [2024-06-28 02:06:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:20,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:23,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:23,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025503068] [2024-06-28 02:06:23,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025503068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:23,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:23,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:23,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383572024] [2024-06-28 02:06:23,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:23,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:23,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:06:23,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:23,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 487 transitions, 9098 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:23,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:23,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:23,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:27,224 INFO L124 PetriNetUnfolderBase]: 8009/12251 cut-off events. [2024-06-28 02:06:27,224 INFO L125 PetriNetUnfolderBase]: For 520821/520836 co-relation queries the response was YES. [2024-06-28 02:06:27,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89776 conditions, 12251 events. 8009/12251 cut-off events. For 520821/520836 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 77750 event pairs, 1406 based on Foata normal form. 13/12254 useless extension candidates. Maximal degree in co-relation 89627. Up to 10852 conditions per place. [2024-06-28 02:06:27,440 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 417 selfloop transitions, 122 changer transitions 0/546 dead transitions. [2024-06-28 02:06:27,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 546 transitions, 10716 flow [2024-06-28 02:06:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:06:27,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:06:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 02:06:27,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-28 02:06:27,442 INFO L175 Difference]: Start difference. First operand has 312 places, 487 transitions, 9098 flow. Second operand 8 states and 194 transitions. [2024-06-28 02:06:27,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 546 transitions, 10716 flow [2024-06-28 02:06:29,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 546 transitions, 10404 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-28 02:06:29,289 INFO L231 Difference]: Finished difference. Result has 315 places, 490 transitions, 9101 flow [2024-06-28 02:06:29,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8789, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9101, PETRI_PLACES=315, PETRI_TRANSITIONS=490} [2024-06-28 02:06:29,290 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 264 predicate places. [2024-06-28 02:06:29,290 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 490 transitions, 9101 flow [2024-06-28 02:06:29,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:29,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:29,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:29,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 02:06:29,291 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:29,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash -706618901, now seen corresponding path program 5 times [2024-06-28 02:06:29,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:29,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664932475] [2024-06-28 02:06:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:29,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:32,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:32,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664932475] [2024-06-28 02:06:32,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664932475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:32,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:32,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:32,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515633201] [2024-06-28 02:06:32,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:32,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:32,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:32,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:32,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:32,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:32,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 490 transitions, 9101 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:32,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:32,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:32,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:35,428 INFO L124 PetriNetUnfolderBase]: 8032/12325 cut-off events. [2024-06-28 02:06:35,429 INFO L125 PetriNetUnfolderBase]: For 529104/529133 co-relation queries the response was YES. [2024-06-28 02:06:35,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89454 conditions, 12325 events. 8032/12325 cut-off events. For 529104/529133 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 78822 event pairs, 1381 based on Foata normal form. 23/12340 useless extension candidates. Maximal degree in co-relation 89304. Up to 10876 conditions per place. [2024-06-28 02:06:35,715 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 422 selfloop transitions, 114 changer transitions 0/543 dead transitions. [2024-06-28 02:06:35,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 543 transitions, 10816 flow [2024-06-28 02:06:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:35,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:06:35,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-28 02:06:35,717 INFO L175 Difference]: Start difference. First operand has 315 places, 490 transitions, 9101 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:06:35,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 543 transitions, 10816 flow [2024-06-28 02:06:38,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 543 transitions, 10540 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 02:06:38,031 INFO L231 Difference]: Finished difference. Result has 316 places, 493 transitions, 9129 flow [2024-06-28 02:06:38,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8831, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9129, PETRI_PLACES=316, PETRI_TRANSITIONS=493} [2024-06-28 02:06:38,032 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 265 predicate places. [2024-06-28 02:06:38,032 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 493 transitions, 9129 flow [2024-06-28 02:06:38,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:38,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:38,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:38,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 02:06:38,032 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:38,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:38,033 INFO L85 PathProgramCache]: Analyzing trace with hash 636162019, now seen corresponding path program 6 times [2024-06-28 02:06:38,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:38,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345801668] [2024-06-28 02:06:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:38,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:40,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:40,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345801668] [2024-06-28 02:06:40,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345801668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:40,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:40,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:06:40,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342290851] [2024-06-28 02:06:40,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:40,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:06:40,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:06:40,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:06:40,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:40,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 493 transitions, 9129 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:40,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:40,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:40,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:43,839 INFO L124 PetriNetUnfolderBase]: 8060/12383 cut-off events. [2024-06-28 02:06:43,839 INFO L125 PetriNetUnfolderBase]: For 535853/535882 co-relation queries the response was YES. [2024-06-28 02:06:44,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89842 conditions, 12383 events. 8060/12383 cut-off events. For 535853/535882 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 79403 event pairs, 1389 based on Foata normal form. 23/12398 useless extension candidates. Maximal degree in co-relation 89691. Up to 10904 conditions per place. [2024-06-28 02:06:44,082 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 420 selfloop transitions, 117 changer transitions 0/544 dead transitions. [2024-06-28 02:06:44,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 544 transitions, 10765 flow [2024-06-28 02:06:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:06:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:06:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-28 02:06:44,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513677811550152 [2024-06-28 02:06:44,084 INFO L175 Difference]: Start difference. First operand has 316 places, 493 transitions, 9129 flow. Second operand 7 states and 169 transitions. [2024-06-28 02:06:44,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 544 transitions, 10765 flow [2024-06-28 02:06:46,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 544 transitions, 10388 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-28 02:06:46,525 INFO L231 Difference]: Finished difference. Result has 317 places, 499 transitions, 9154 flow [2024-06-28 02:06:46,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8779, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9154, PETRI_PLACES=317, PETRI_TRANSITIONS=499} [2024-06-28 02:06:46,526 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 266 predicate places. [2024-06-28 02:06:46,526 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 499 transitions, 9154 flow [2024-06-28 02:06:46,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:46,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:46,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:46,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 02:06:46,526 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:46,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:46,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1304849009, now seen corresponding path program 4 times [2024-06-28 02:06:46,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:46,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916713592] [2024-06-28 02:06:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:46,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:49,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:49,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916713592] [2024-06-28 02:06:49,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916713592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:49,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:49,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:49,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482185238] [2024-06-28 02:06:49,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:49,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:49,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:49,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:49,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:06:49,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:49,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 499 transitions, 9154 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:49,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:49,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:49,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:06:52,699 INFO L124 PetriNetUnfolderBase]: 8106/12379 cut-off events. [2024-06-28 02:06:52,699 INFO L125 PetriNetUnfolderBase]: For 546295/546310 co-relation queries the response was YES. [2024-06-28 02:06:52,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90031 conditions, 12379 events. 8106/12379 cut-off events. For 546295/546310 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 78543 event pairs, 1400 based on Foata normal form. 14/12383 useless extension candidates. Maximal degree in co-relation 89881. Up to 10899 conditions per place. [2024-06-28 02:06:52,912 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 426 selfloop transitions, 138 changer transitions 0/571 dead transitions. [2024-06-28 02:06:52,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 571 transitions, 11073 flow [2024-06-28 02:06:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:06:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:06:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-28 02:06:52,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153664302600472 [2024-06-28 02:06:52,913 INFO L175 Difference]: Start difference. First operand has 317 places, 499 transitions, 9154 flow. Second operand 9 states and 218 transitions. [2024-06-28 02:06:52,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 571 transitions, 11073 flow [2024-06-28 02:06:54,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 571 transitions, 10893 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 02:06:54,906 INFO L231 Difference]: Finished difference. Result has 323 places, 507 transitions, 9443 flow [2024-06-28 02:06:54,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8974, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9443, PETRI_PLACES=323, PETRI_TRANSITIONS=507} [2024-06-28 02:06:54,906 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 272 predicate places. [2024-06-28 02:06:54,907 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 507 transitions, 9443 flow [2024-06-28 02:06:54,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:54,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:06:54,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:06:54,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 02:06:54,907 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:06:54,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:06:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash 873453615, now seen corresponding path program 6 times [2024-06-28 02:06:54,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:06:54,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059750258] [2024-06-28 02:06:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:06:54,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:06:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:06:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:06:57,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:06:57,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059750258] [2024-06-28 02:06:57,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059750258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:06:57,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:06:57,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:06:57,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447285571] [2024-06-28 02:06:57,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:06:57,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:06:57,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:06:57,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:06:57,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:06:57,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:06:57,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 507 transitions, 9443 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:06:57,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:06:57,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:06:57,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:01,337 INFO L124 PetriNetUnfolderBase]: 8129/12361 cut-off events. [2024-06-28 02:07:01,338 INFO L125 PetriNetUnfolderBase]: For 567166/567172 co-relation queries the response was YES. [2024-06-28 02:07:01,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90948 conditions, 12361 events. 8129/12361 cut-off events. For 567166/567172 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 77840 event pairs, 1545 based on Foata normal form. 2/12341 useless extension candidates. Maximal degree in co-relation 90797. Up to 9919 conditions per place. [2024-06-28 02:07:01,587 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 306 selfloop transitions, 250 changer transitions 0/563 dead transitions. [2024-06-28 02:07:01,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 563 transitions, 11353 flow [2024-06-28 02:07:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:07:01,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-28 02:07:01,589 INFO L175 Difference]: Start difference. First operand has 323 places, 507 transitions, 9443 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:07:01,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 563 transitions, 11353 flow [2024-06-28 02:07:03,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 563 transitions, 11090 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:03,701 INFO L231 Difference]: Finished difference. Result has 326 places, 510 transitions, 9750 flow [2024-06-28 02:07:03,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9180, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9750, PETRI_PLACES=326, PETRI_TRANSITIONS=510} [2024-06-28 02:07:03,705 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 275 predicate places. [2024-06-28 02:07:03,705 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 510 transitions, 9750 flow [2024-06-28 02:07:03,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:03,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:03,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:03,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 02:07:03,706 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:03,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:03,707 INFO L85 PathProgramCache]: Analyzing trace with hash -470186911, now seen corresponding path program 5 times [2024-06-28 02:07:03,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:03,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177791955] [2024-06-28 02:07:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:03,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:06,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:06,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177791955] [2024-06-28 02:07:06,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177791955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:06,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:06,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:06,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562401560] [2024-06-28 02:07:06,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:06,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:06,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:06,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:06,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 510 transitions, 9750 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:06,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:06,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:06,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:10,032 INFO L124 PetriNetUnfolderBase]: 8247/12595 cut-off events. [2024-06-28 02:07:10,032 INFO L125 PetriNetUnfolderBase]: For 588755/588770 co-relation queries the response was YES. [2024-06-28 02:07:10,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93844 conditions, 12595 events. 8247/12595 cut-off events. For 588755/588770 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 80084 event pairs, 1490 based on Foata normal form. 14/12599 useless extension candidates. Maximal degree in co-relation 93691. Up to 9985 conditions per place. [2024-06-28 02:07:10,837 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 423 selfloop transitions, 160 changer transitions 0/590 dead transitions. [2024-06-28 02:07:10,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 590 transitions, 12092 flow [2024-06-28 02:07:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 02:07:10,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-28 02:07:10,839 INFO L175 Difference]: Start difference. First operand has 326 places, 510 transitions, 9750 flow. Second operand 8 states and 199 transitions. [2024-06-28 02:07:10,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 590 transitions, 12092 flow [2024-06-28 02:07:12,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 590 transitions, 11576 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 02:07:12,585 INFO L231 Difference]: Finished difference. Result has 331 places, 530 transitions, 10074 flow [2024-06-28 02:07:12,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9234, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10074, PETRI_PLACES=331, PETRI_TRANSITIONS=530} [2024-06-28 02:07:12,586 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 280 predicate places. [2024-06-28 02:07:12,586 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 530 transitions, 10074 flow [2024-06-28 02:07:12,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:12,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:12,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:12,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 02:07:12,586 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:12,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:12,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1223973183, now seen corresponding path program 7 times [2024-06-28 02:07:12,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:12,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500886455] [2024-06-28 02:07:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:15,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:15,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500886455] [2024-06-28 02:07:15,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500886455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:15,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:15,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:15,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688239024] [2024-06-28 02:07:15,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:15,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:15,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:15,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:15,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:15,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:15,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 530 transitions, 10074 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:15,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:15,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:15,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:19,597 INFO L124 PetriNetUnfolderBase]: 8244/12626 cut-off events. [2024-06-28 02:07:19,597 INFO L125 PetriNetUnfolderBase]: For 596223/596238 co-relation queries the response was YES. [2024-06-28 02:07:19,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95646 conditions, 12626 events. 8244/12626 cut-off events. For 596223/596238 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 80649 event pairs, 1395 based on Foata normal form. 13/12629 useless extension candidates. Maximal degree in co-relation 95490. Up to 11154 conditions per place. [2024-06-28 02:07:19,895 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 447 selfloop transitions, 129 changer transitions 0/583 dead transitions. [2024-06-28 02:07:19,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 583 transitions, 11855 flow [2024-06-28 02:07:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-28 02:07:19,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-28 02:07:19,896 INFO L175 Difference]: Start difference. First operand has 331 places, 530 transitions, 10074 flow. Second operand 8 states and 192 transitions. [2024-06-28 02:07:19,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 583 transitions, 11855 flow [2024-06-28 02:07:21,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 583 transitions, 11754 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-28 02:07:21,637 INFO L231 Difference]: Finished difference. Result has 337 places, 530 transitions, 10238 flow [2024-06-28 02:07:21,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9973, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10238, PETRI_PLACES=337, PETRI_TRANSITIONS=530} [2024-06-28 02:07:21,638 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 286 predicate places. [2024-06-28 02:07:21,638 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 530 transitions, 10238 flow [2024-06-28 02:07:21,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:21,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:21,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:21,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 02:07:21,639 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:21,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:21,639 INFO L85 PathProgramCache]: Analyzing trace with hash -470602621, now seen corresponding path program 6 times [2024-06-28 02:07:21,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:21,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053726342] [2024-06-28 02:07:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:21,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:24,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:24,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053726342] [2024-06-28 02:07:24,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053726342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:24,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:24,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:24,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860926407] [2024-06-28 02:07:24,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:24,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:24,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:24,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:24,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:24,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:24,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 530 transitions, 10238 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:24,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:24,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:24,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:28,906 INFO L124 PetriNetUnfolderBase]: 8238/12578 cut-off events. [2024-06-28 02:07:28,906 INFO L125 PetriNetUnfolderBase]: For 601459/601474 co-relation queries the response was YES. [2024-06-28 02:07:29,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95415 conditions, 12578 events. 8238/12578 cut-off events. For 601459/601474 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 79922 event pairs, 1412 based on Foata normal form. 14/12582 useless extension candidates. Maximal degree in co-relation 95256. Up to 11118 conditions per place. [2024-06-28 02:07:29,363 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 443 selfloop transitions, 133 changer transitions 0/583 dead transitions. [2024-06-28 02:07:29,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 583 transitions, 11852 flow [2024-06-28 02:07:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:29,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:07:29,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-06-28 02:07:29,368 INFO L175 Difference]: Start difference. First operand has 337 places, 530 transitions, 10238 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:07:29,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 583 transitions, 11852 flow [2024-06-28 02:07:31,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 583 transitions, 11395 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-28 02:07:31,875 INFO L231 Difference]: Finished difference. Result has 336 places, 531 transitions, 10073 flow [2024-06-28 02:07:31,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9781, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10073, PETRI_PLACES=336, PETRI_TRANSITIONS=531} [2024-06-28 02:07:31,875 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 285 predicate places. [2024-06-28 02:07:31,875 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 531 transitions, 10073 flow [2024-06-28 02:07:31,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:31,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:31,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:31,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 02:07:31,876 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:31,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1639253423, now seen corresponding path program 7 times [2024-06-28 02:07:31,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:31,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968516666] [2024-06-28 02:07:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:31,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:34,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:34,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968516666] [2024-06-28 02:07:34,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968516666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:34,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:34,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:34,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864992619] [2024-06-28 02:07:34,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:34,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:34,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:34,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:34,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:34,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:34,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 531 transitions, 10073 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:34,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:34,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:34,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:38,142 INFO L124 PetriNetUnfolderBase]: 8261/12554 cut-off events. [2024-06-28 02:07:38,142 INFO L125 PetriNetUnfolderBase]: For 613164/613170 co-relation queries the response was YES. [2024-06-28 02:07:38,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94646 conditions, 12554 events. 8261/12554 cut-off events. For 613164/613170 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 79230 event pairs, 1560 based on Foata normal form. 2/12534 useless extension candidates. Maximal degree in co-relation 94490. Up to 10085 conditions per place. [2024-06-28 02:07:38,476 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 320 selfloop transitions, 255 changer transitions 0/582 dead transitions. [2024-06-28 02:07:38,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 582 transitions, 11878 flow [2024-06-28 02:07:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:07:38,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:07:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 02:07:38,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-28 02:07:38,487 INFO L175 Difference]: Start difference. First operand has 336 places, 531 transitions, 10073 flow. Second operand 8 states and 194 transitions. [2024-06-28 02:07:38,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 582 transitions, 11878 flow [2024-06-28 02:07:40,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 582 transitions, 11603 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 02:07:40,338 INFO L231 Difference]: Finished difference. Result has 338 places, 534 transitions, 10381 flow [2024-06-28 02:07:40,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9798, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10381, PETRI_PLACES=338, PETRI_TRANSITIONS=534} [2024-06-28 02:07:40,339 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 287 predicate places. [2024-06-28 02:07:40,339 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 534 transitions, 10381 flow [2024-06-28 02:07:40,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:40,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:40,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:40,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 02:07:40,340 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:40,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash -298344791, now seen corresponding path program 8 times [2024-06-28 02:07:40,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:40,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331333807] [2024-06-28 02:07:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:40,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:43,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:43,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331333807] [2024-06-28 02:07:43,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331333807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:43,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:43,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:43,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896696138] [2024-06-28 02:07:43,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:43,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:43,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:43,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:43,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 534 transitions, 10381 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:43,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:43,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:43,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:07:47,847 INFO L124 PetriNetUnfolderBase]: 8258/12637 cut-off events. [2024-06-28 02:07:47,848 INFO L125 PetriNetUnfolderBase]: For 618221/618236 co-relation queries the response was YES. [2024-06-28 02:07:47,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95622 conditions, 12637 events. 8258/12637 cut-off events. For 618221/618236 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 80604 event pairs, 1392 based on Foata normal form. 13/12640 useless extension candidates. Maximal degree in co-relation 95465. Up to 11174 conditions per place. [2024-06-28 02:07:48,013 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 462 selfloop transitions, 131 changer transitions 0/600 dead transitions. [2024-06-28 02:07:48,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 600 transitions, 12144 flow [2024-06-28 02:07:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:07:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:07:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-28 02:07:48,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957446808510638 [2024-06-28 02:07:48,015 INFO L175 Difference]: Start difference. First operand has 338 places, 534 transitions, 10381 flow. Second operand 10 states and 233 transitions. [2024-06-28 02:07:48,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 600 transitions, 12144 flow [2024-06-28 02:07:50,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 600 transitions, 11876 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 02:07:50,203 INFO L231 Difference]: Finished difference. Result has 344 places, 534 transitions, 10381 flow [2024-06-28 02:07:50,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10113, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10381, PETRI_PLACES=344, PETRI_TRANSITIONS=534} [2024-06-28 02:07:50,204 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 293 predicate places. [2024-06-28 02:07:50,204 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 534 transitions, 10381 flow [2024-06-28 02:07:50,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:50,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:07:50,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:07:50,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 02:07:50,205 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:07:50,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:07:50,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1662869503, now seen corresponding path program 7 times [2024-06-28 02:07:50,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:07:50,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213734360] [2024-06-28 02:07:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:07:50,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:07:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:07:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:07:53,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:07:53,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213734360] [2024-06-28 02:07:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213734360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:07:53,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:07:53,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:07:53,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996005071] [2024-06-28 02:07:53,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:07:53,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:07:53,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:07:53,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:07:53,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:07:53,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-28 02:07:53,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 534 transitions, 10381 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:07:53,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:07:53,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-28 02:07:53,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand